Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG897-1995
Mass Flow Meters
Issued on July 5, 1995
Implementation on December 1, 1995
Issued by the State Bureau of Technical Supervision
JE:897
Verification Regulations of Mass Flow Meters
VerificationRcgulatinnof
Mass Flow Meters
JJG897-1995
This verification regulation was approved by the State Bureau of Technical Supervision on July 5, 1995, and came into effect on December 1, 1995.
Responsible unit: Chinese Academy of Planning and Engineering Drafting unit: Taihang Instrument Factory, Chinese Academy of Metrology
The drafting unit is responsible for interpreting the technical provisions of this regulation. The main drafters of this regulation:
Zhai Xiuzhen
Yang Zongxia
Participating drafters:
Lin Zhenxin
Li Niukuan
JJG897—1995
(Chinese Academy of Metrology)
(Taihang Instrument Factory)
(Beijing Chemical Research Institute) Institute of Chemical Engineering)
(Beijing Yanshan Chemical Industry Co., Ltd.)
(Sinopec Industrial Engineering Institute)
(Shanxi Provincial Institute of Basic Engineering)
Technical Requirements
Verification Items
Verification Items and Verification Methods
Verification Results and Verification Periods
[.1G897—1995
Appendix Actual Mass or Volume Values of Fluids Measured by Common Standard Instruments and Calculation Formulas for Flow Flow Flow Meter 1 Density Test
Appendix 3 Flow Meter 3 Static test is
Appendix 4 Verification format
Appendix 5 Range coefficient α, table·…
(4)
:(10)
. (i4)
G897—1995
Mass flowmeter verification procedure
This procedure is applicable to the verification of new, used and repaired mass flowmeters. Overview
Mass flowmeter (hereinafter referred to as this meter) is a flowmeter used to measure the quality, flow rate or total amount of fluid flowing through a certain cross-section.
2 Original
2.1 Coriolis or mass flow meter (CF) 1) Its principle is to use the Coriolis force generated when the fluid flows in the flow tube to measure the mass flow of the fluid directly or indirectly. The flow meter is composed of a flow sensor (hereinafter referred to as a sensor) and a transmitter: it can directly measure the mass and total mass of the fluid, and some can also measure the density of the fluid. 2.2 Thermal flow meter (hereinafter referred to as flow meter 2) Its original principle is to set a heat source outside the wall, use the dependence of heat and mass transfer of flowing gas, and produce temperature changes in the upstream and downstream to obtain the mass flow and total mass of the gas. The flow meter is generally composed of a sensor and a transmitter. 3.3 Impulse flow meter (hereinafter referred to as flow meter 3) is a kind of meter for measuring bulk or granular fluids. The main purpose is to obtain the total flow rate by measuring the force caused by the impact of the material flowing freely at a high altitude and the force generated by the material when it moves under the detection technology. The flow meter is generally composed of an impact type flow transmitter and an impact type flow meter. For example: variable component test mass flow meter; differential pressure type, angular motion type mass flow meter, etc. 2 Technical requirements
3: Appearance and random delivery requirements
3.1 Appearance requirements
3.1.1 The flow meter should have a nameplate, which should indicate the manufacturer, factory mark, trademark, flow meter name and number, manufacturing year and month, industry number, nominal value, flow specification, accuracy grade, and meter type manufacturing certification mark. If it is an explosion-proof instrument, it should have an explosion-proof mark. 3.1.2 The sensor should have a flow direction mark on the measuring part of the shell: 3.1.3 The appearance of the flow meter is neat and tidy, the mark is correct, the surface coating layer is evenly colored, and there should be no peeling, flaking, rust, etc.
3.1.4 The font symbols on the panels of the transmitter and flow meter should be clear and beautiful, and the display port should not have scratches, scratches and other defects that affect the reading. The glass of the reading device should have good transparency. 1
JIG971995
3.2 The flow product should have an instruction manual, technical specifications, sensor materials, etc. 3.3 The flow meter that is periodically calibrated should also have the last calibration certificate: 1 Compressive strength
After the pressure resistance test, the shell and seal of the sensor should not have leakage or cracking. 5 Basic error
5. [Convection meter 2, flow meter 3, the basic error of the flow meter within the specified flow range should not exceed the basic error limit specified in Table 1.
Accuracy level
Basic error limit
F (%)
=0.25±0.32
: () The non-accurate level and basic error of the month are not necessary and can be used. 5.2 The basic error of the flow meter 1 shall not exceed the error limit calculated according to formula (1), - ( +9
Wherein: Ea.bzxZ.net
The error limit of the first point:
The basic error limit in Table 1 (or the instruction manual); 9.
The weight of the first point;
The isotropic stability of flowmeter 1.
5.5The basic error limit may be specified by the manufacturer or in accordance with the instructions. Repeatability
6.1The repeatability of each point of flowmeter 1 shall not exceed 12 of the basic error limit specified in Article 5.3.6.2The repeatability of flowmeter 2 shall not exceed 12 of the basic error in Table 1.2.5
G.3The singleness of the actual flow calibration of flowmeter 3 on site shall not exceed the set error limit in Table 1, and the static calibration shall not exceed the basic error limit in Table 1!/2
Three calibration conditions
7Setting capital
7.1Standard 7.1.1 Standard equipment for calibrating flowmeter 1: Mass method liquid density standard device; 1: Volumetric method filter current standard device; 2: Volume tube method liquid flow standard device; 3: Standard thermocouple flow standard device; 4: Standard flowmeter method gas flow standard device; 5: Standard flowmeter method gas flow standard device; 6: Standard flowmeter method gas flow standard device; 7.1.2 Standard equipment for calibrating flowmeter 1: Soap film gas flow standard device; 7.1.3 Standard equipment for calibrating flowmeter 3: 7.1.3.1 Current calibration and inspection; 8: Basic science; 9: Basic science; 10: Basic science; 11: Basic science; 12: Basic science; 13: Basic science; 14: Basic science; 15: Basic science; 16: Basic science; 17: Basic science; 18: Basic science; 19: Basic science; 20: Basic science; 21: Basic science; 22: Basic science; 23: Basic science; 24: Basic science; 25: Basic science; 26: Basic science; 27: Basic science; 28: Basic science; 29: Basic science; 30: Basic science; 31: Basic science; 32: Basic science; 33: Basic science; 34: Basic science; 35: Basic science; 36: Basic science; 37: Basic science; 38: Basic science; 39: Basic science; 40: Basic science; 41: Basic science; 42: Basic science; 43: Basic science; 44: Basic science; 45: Basic science; 46: Basic science; 47: Basic science; 48: Basic science; 49: Basic science; 50: Basic science; 51: Basic science; 52: Basic science; 53: Basic science; 54: Basic science; 55: Basic science; 56: Basic science; 57: Basic science; 58: Basic science; 59: Basic science Article 7.2: Main auxiliary equipment
7.2.1: For calibration of meter 1
JJC18971995
. Second-class standard density or better than 0.05 grade in the money density (with the same as Article 7.1. "Item bc standard who is equipped with h measurement range division value (, 1 thermometer; pressure test bench
7.2.2: For calibration flow meter 2
a: Measuring range 0-5t division value .1t thermometer + seven. Second clothes;
Account mountain test bench:
7.2.3: Flow meter 13 on-site actual flow calibration
H. Weighing container:
h. Water meter;
|Secret table:
d, thermometer.
3Standard equipment and case meters, thermometers, etc. should have valid calibration certificates. ? .4The accuracy of the standard equipment should be better than 1/3 of the error limit of the micro-flowmeter. 8Test medium requirements
8.1For the standard sections of 7.1.1 and 7.1.2, the medium should be filled with test pipes and flowmeters. .2The medium should be clean and free of fibers or other impurities. B.3For powdery solid materials, the physical properties should remain unchanged, the particles should be uniform, and the maximum diameter should not exceed 20mm; .1The temperature change of the medium should not exceed 1 during the calibration process of a point, and should not exceed 5 during the completion of the entire calibration process.
! Environmental preparation
JIG 897—1995
9.1 Gas conditions: Temperature is generally 1535: Relative mud is generally 45%~75%: Atmospheric pressure is generally 86~106 kPa:
9.2 Site conditions: Electric field and dynamic interference should not affect the test results of the flow meter. Verification items and verification methods
1 Inspection of external specifications and accompanying parts:
10.1 Appearance inspection
Use the test method to inspect the appearance of the flow meter, and the results should meet the requirements of Section 3.1. 10.2 Random document inspection
The system should meet the requirements of Section 3.2.3.11 Pressure resistance test
11 Newly manufactured sensors shall be subjected to pressure resistance test: all replaced main pipes and other parts of the body shall be subjected to pressure resistance test.
11.2 Install the sensor on the pressure test bench and pass 1.5 times the nominal pressure for 5 minutes. The result shall meet the requirements of Article 4.
12.1 Selection of verification equipment
12.1.1 Select verification equipment according to Article 7 based on the flow meter form. 12.1.2 Select verification equipment according to Article 2.4: 12.2.1 The flow meter shall be installed according to the technical requirements in the instruction manual. 12.2.2 For item 7.1.E, 7.1.2 the standard equipment should be installed upstream and downstream of the flow meter: the length of the straight pipe section must be verified, 12.2.3 The flow meter 1 and flow meter 2 should be installed axially with the upstream and downstream pipe sections, and the light-insulating and sealed small seat should be placed in the pipe,
12.2.4 The level adjustment of flow meter 3 should be carried out under 1~10m (or 4~20mA), and the deviation should be less than -0.3%.
[2.2.5 Connect the calibration system to receive the flow meter and preheat for about 30 minutes. 12.3 Trial run
Before calibration, the flowmeter should be run at least 50% of the flow rate for a period of time, generally not less than 10 minutes (not less than 5 times), and then zero adjustment and calibration should be carried out: 12,4 Check the standard setting. There should be no seepage at the connection: the temperature and pressure of the calibration medium should be stable, and the system operation and display should be stable.
12.5 Flow and calibration points
12.5. The calibration point of the flow function F1 and the flow meter 2 is generally the maximum flow, 0.57+0.2 and then back to 9 or the user-specified calibration point
JJC897—1995
When the range of the basic meter exceeds 5-1, a minimum flow calibration point 4mc12.5,2 flow meter 3 on-site actual flow calibration, a section of the common flow is selected as the calibration point, and the calibration should not be less than Ding 60%c
12.6 Standard European efficiency
Each calibration point should be calibrated at least 3 times:
1.3 Inspection method
13,1 Flowmeter 1 inspection implementation
13,1.1 Flowmeter 1 indication calibration can be carried out using the measured method, volumetric method plus density, only pulse input [random meter should also refer to the book regulations, mass method
Suitable mass method and method of connecting the mass basis of the mass flowing through the flowmeter 1. Or by: calculate the mass flow through the flowmeter 1 as long as there are components to use this treatment 6, volumetric method and meter matching: currency volumetric method measures the standard instantaneous rest value of the flowmeter 1 (according to Appendix [(3) meter potential) and the medium output, and then press the formula! 4) Calculate the mass M of the standard instrument or calculate the mass flow measured by the standard instrument according to formula (3). This is an indirect measurement method. It is best to select a standard density meter for variable measurement.
c, volume tube method and density meter: use the volume tube method to measure the volume Vs (calculated according to the attached calculation) and the density value \ through the flow meter 1. Calculate the mass M of the standard instrument using formula (4) or calculate the mass M measured by the small standard instrument using formula (3). Mother flow year, this is to measure the method: it is best to choose the line density meter,
d. Standard meter method: use the standard flow meter as the standard to compare with the flow meter 1: it is best to choose the standard flow meter of the same type as the flow meter 1, with the same specifications. 13.1.2 Orange Chu rate
currency method, the flow charts of the internal calibration of the density meter, the volume tube method and the density meter are shown in Figure 1, Figure 2 and Figure 3 respectively.
The following is an example:
a, start the program and open valves 2, 6.9, 1 at the same time to make the flow longer. Test the program in the system cycle, h. Adjust valve 6 to adjust the flow to qx, run the lock, and reset the independent timer;. Replace the reversing device with a bypass pipe, close 10, eliminate the excess of the weighing container, start the reversing device to replace the weighing container, and at the same time use the timer and flow meter [or meter ball, flow bean, mass plate);
e, when the set time is reached, the water mark is replaced with a bypass pipe, and then the stop timer f is used to determine the final positive mass of the flow meter, and at the same time record the pulse number (or mass flow) of the flow meter 1, the timing time and the blueness (medium, environment), pressure user, 2, only accept the inspection and the overall record: &: Use formula (2) to calculate the mass method to obtain the medium mass M flowing through the flow meter = m-mi
wide flow meter
cut-off time
just stop
to the scale juice
J.JG H97—1995
thermometer
exchange device
figure quality calibration flow chart
juice resistance device
you naturally good absorption meter
benefit spot
my limit
thank you 2 Ben visual method calibration process range
press to the
floor stop road
h. The actual mass of the medium Ms is calculated according to formula (1) or (2) in Appendix 1. Flow indication 4 is calculated according to formula (3); i. Repeat bh and do two more steps:
regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat -i until the calibration is completed:
13, 2 Flow rate 2 calibration
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 81.E, 7.1.2 The standard equipment is installed upstream and downstream of the flowmeter: the length of the straight pipe section must be verified, 12.2.3 The flowmeter 1 and the flow meter 2 are installed in parallel with the upstream and downstream pipe sections, and the light is formed, the sealing seat is placed in the pipe,
12.2.4 The level adjustment of the flowmeter 3 should be carried out at 1~10m (or 4~20mA) and its deviation should be less than 0.3%.
[2.2.5 Connect the calibration system to receive the flowmeter and preheat for 30min. 12.3 Trial operation
Before calibration, the flowmeter should be tested for a period of time at a flow rate of at least 50%, generally not less than 10min (not less than 5 times), and then zero adjustment and calibration should be carried out: 12, 4 Check that there is no seepage at the connection of the standard equipment: the temperature and pressure of the calibration medium should be stable, and the system operation and display should be stable.
12.5 flow and calibration point
12.5. The calibration point of flow function F1 and flow meter 2 is generally the maximum flow, 0.57+0.2 and then back to 9 or the user-specified calibration point
JJC897—1995
When the application range of the soil-based meter exceeds 5-1, a minimum flow calibration point 4mc12.5,2 flow meter 3 on-site actual flow calibration, a section of the common flow bamboo is selected as the calibration point, and the calibration should not be less than Ding 60%c
12.6 Standard European efficiency
Each calibration point should be calibrated at least 3 times:
1.3 Inspection method
13,1 Flowmeter 1 inspection implementation
13,1.1 Flowmeter 1 indication calibration can be carried out using the measured method, volumetric method plus density, only pulse input [random meter should also refer to the book regulations, mass method
Suitable mass method and method of connecting the mass basis of the mass flowing through the flowmeter 1. Or by: calculate the mass flow through the flowmeter 1 as long as there are components to use this treatment 6, volumetric method and meter matching: currency volumetric method measures the standard instantaneous rest value of the flowmeter 1 (according to Appendix [(3) meter potential) and the medium output, and then press the formula! 4) Calculate the mass M of the standard instrument or calculate the mass flow measured by the standard instrument according to formula (3). This is an indirect measurement method. It is best to select a standard density meter for variable measurement.
c, volume tube method and density meter: use the volume tube method to measure the volume Vs (calculated according to the attached calculation) and the density value \ through the flow meter 1. Calculate the mass M of the standard instrument using formula (4) or calculate the mass M measured by the small standard instrument using formula (3). Mother flow year, this is to measure the method: it is best to choose the line density meter,
d. Standard meter method: use the standard flow meter as the standard to compare with the flow meter 1: it is best to choose the standard flow meter of the same type as the flow meter 1, with the same specifications. 13.1.2 Orange Chu rate
currency method, the flow charts of the internal calibration of the density meter, the volume tube method and the density meter are shown in Figure 1, Figure 2 and Figure 3 respectively.
The following is an example:
a, start the program and open valves 2, 6.9, 1 at the same time to make the flow longer. Test the program in the system cycle, h. Adjust valve 6 to adjust the flow to qx, run the lock, and reset the independent timer;. Replace the reversing device with a bypass pipe, close 10, eliminate the excess of the weighing container, start the reversing device to replace the weighing container, and at the same time use the timer and flow meter [or meter ball, flow bean, mass plate);
e, when the set time is reached, the water mark is replaced with a bypass pipe, and then the stop timer f is used to determine the final positive mass of the flow meter, and at the same time record the pulse number (or mass flow) of the flow meter 1, the timing time and the blueness (medium, environment), pressure user, 2, only accept the inspection and the overall record: &: Use formula (2) to calculate the mass method to obtain the medium mass M flowing through the flow meter = m-mi
wide flow meter
cut-off time
just stop
to the scale juice
J.JG H97—1995
thermometer
exchange device
figure quality calibration flow chart
juice resistance device
you naturally good absorption meter
benefit spot
my limit
thank you 2 Ben visual method calibration process range
press to the
floor stop road
h. The actual mass of the medium Ms is calculated according to formula (1) or (2) in Appendix 1. Flow indication 4 is calculated according to formula (3); i. Repeat bh and do two more steps:
regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat -i until the calibration is completed:
13, 2 Flow rate 2 calibration
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 81.E, 7.1.2 The standard equipment is installed upstream and downstream of the flowmeter: the length of the straight pipe section must be verified, 12.2.3 The flowmeter 1 and the flow meter 2 are installed in parallel with the upstream and downstream pipe sections, and the light is formed, the sealing seat is placed in the pipe,
12.2.4 The level adjustment of the flowmeter 3 should be carried out at 1~10m (or 4~20mA) and its deviation should be less than 0.3%.
[2.2.5 Connect the calibration system to receive the flowmeter and preheat for 30min. 12.3 Trial operation
Before calibration, the flowmeter should be tested for a period of time at a flow rate of at least 50%, generally not less than 10min (not less than 5 times), and then zero adjustment and calibration should be carried out: 12, 4 Check that there is no seepage at the connection of the standard equipment: the temperature and pressure of the calibration medium should be stable, and the system operation and display should be stable.
12.5 flow and calibration point
12.5. The calibration point of flow function F1 and flow meter 2 is generally the maximum flow, 0.57+0.2 and then back to 9 or the user-specified calibration point
JJC897—1995
When the application range of the soil-based meter exceeds 5-1, a minimum flow calibration point 4mc12.5,2 flow meter 3 on-site actual flow calibration, a section of the common flow bamboo is selected as the calibration point, and the calibration should not be less than Ding 60%c
12.6 Standard European efficiency
Each calibration point should be calibrated at least 3 times:
1.3 Inspection method
13,1 Flowmeter 1 inspection implementation
13,1.1 Flowmeter 1 indication calibration can be carried out using the measured method, volumetric method plus density, only pulse input [random meter should also refer to the book regulations, mass method
Suitable mass method and method of connecting the mass basis of the mass flowing through the flowmeter 1. Or by: calculate the mass flow through the flowmeter 1 as long as there are components to use this treatment 6, volumetric method and meter matching: currency volumetric method measures the standard instantaneous rest value of the flowmeter 1 (according to Appendix [(3) meter potential) and the medium output, and then press the formula! 4) Calculate the mass M of the standard instrument or calculate the mass flow measured by the standard instrument according to formula (3). This is an indirect measurement method. It is best to select a standard density meter for variable measurement.
c, volume tube method and density meter: use the volume tube method to measure the volume Vs (calculated according to the attached calculation) and the density value \ through the flow meter 1. Calculate the mass M of the standard instrument using formula (4) or calculate the mass M measured by the small standard instrument using formula (3). Mother flow year, this is to measure the method: it is best to choose the line density meter,
d. Standard meter method: use the standard flow meter as the standard to compare with the flow meter 1: it is best to choose the standard flow meter of the same type as the flow meter 1, with the same specifications. 13.1.2 Orange Chu rate
currency method, the flow charts of the internal calibration of the density meter, the volume tube method and the density meter are shown in Figure 1, Figure 2 and Figure 3 respectively.
The following is an example:
a, start the program and open valves 2, 6.9, 1 at the same time to make the flow longer. Test the program in the system cycle, h. Adjust valve 6 to adjust the flow to qx, run the lock, and reset the independent timer;. Replace the reversing device with a bypass pipe, close 10, eliminate the excess of the weighing container, start the reversing device to replace the weighing container, and at the same time use the timer and flow meter [or meter ball, flow bean, mass plate);
e, when the set time is reached, the water mark is replaced with a bypass pipe, and then the stop timer f is used to determine the final positive mass of the flow meter, and at the same time record the pulse number (or mass flow) of the flow meter 1, the timing time and the blueness (medium, environment), pressure user, 2, only accept the inspection and the overall record: &: Use formula (2) to calculate the mass method to obtain the medium mass M flowing through the flow meter = m-mi
wide flow meter
cut-off time
just stop
to the scale juice
J.JG H97—1995
thermometer
exchange device
figure quality calibration flow chart
juice resistance device
you naturally good absorption meter
benefit spot
my limit
thank you 2 Ben visual method calibration process range
press to the
floor stop road
h. The actual mass of the medium Ms is calculated according to formula (1) or (2) in Appendix 1. Flow indication 4 is calculated according to formula (3); i. Repeat bh and do two more steps:
regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat -i until the calibration is completed:
13, 2 Flow rate 2 calibration
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 83 Inspection method
13,1 Inspection of flowmeter 1
13,1.1 The indication of flowmeter 1 can be verified by the measured method, volumetric method plus density, only pulse input [random meter should also refer to the book regulations, mass method
is sufficient and the mass method is connected to the mass basis of flowmeter 1. Or by: calculate the mass flow through flowmeter 1 as long as there are components to use this treatment 6, volumetric method and meter matching: currency volumetric method measures the standard instantaneous value of flowmeter 1 (according to Appendix [(3) meter potential) and medium output, and then press the formula! 4) Calculate the mass M of the standard instrument or calculate the mass flow measured by the standard instrument according to formula (3). This is an indirect measurement method. It is best to select a standard density meter for variable measurement.
c, volume tube method and density meter: use the volume tube method to measure the volume Vs (calculated according to the attached calculation) and the density value \ through the flow meter 1. Calculate the mass M of the standard instrument using formula (4) or calculate the mass M measured by the small standard instrument using formula (3). Mother flow year, this is to measure the method: it is best to choose the line density meter,
d. Standard meter method: use the standard flow meter as the standard to compare with the flow meter 1: it is best to choose the standard flow meter of the same type as the flow meter 1, with the same specifications. 13.1.2 Orange Chu rate
currency method, the flow charts of the internal calibration of the density meter, the volume tube method and the density meter are shown in Figure 1, Figure 2 and Figure 3 respectively.
The following is an example:
a, start the program and open valves 2, 6.9, 1 at the same time to make the flow longer. Test the program in the system cycle, h. Adjust valve 6 to adjust the flow to qx, run the lock, and reset the independent timer;. Replace the reversing device with a bypass pipe, close 10, eliminate the excess of the weighing container, start the reversing device to replace the weighing container, and at the same time use the timer and flow meter [or meter ball, flow bean, mass plate);
e, when the set time is reached, the water mark is replaced with a bypass pipe, and then the stop timer f is used to determine the final positive mass of the flow meter, and at the same time record the pulse number (or mass flow) of the flow meter 1, the timing time and the blueness (medium, environment), pressure user, 2, only accept the inspection and the overall record: &: Use formula (2) to calculate the mass method to obtain the medium mass M flowing through the flow meter = m-mi
wide flow meter
cut-off time
just stop
to the scale juice
J.JG H97—1995
thermometer
exchange device
figure quality calibration flow chart
juice resistance device
you naturally good absorption meter
benefit spot
my limit
thank you 2 Ben visual method calibration process range
press to the
floor stop road
h. The actual mass of the medium Ms is calculated according to formula (1) or (2) in Appendix 1. Flow indication 4 is calculated according to formula (3); i. Repeat bh and do two more steps:
regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat -i until the calibration is completed:
13, 2 Flow rate 2 calibration
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 83 Inspection method
13,1 Inspection of flowmeter 1
13,1.1 The indication of flowmeter 1 can be verified by the measured method, volumetric method plus density, only pulse input [random meter should also refer to the book regulations, mass method
is sufficient and the mass method is connected to the mass basis of flowmeter 1. Or by: calculate the mass flow through flowmeter 1 as long as there are components to use this treatment 6, volumetric method and meter matching: currency volumetric method measures the standard instantaneous value of flowmeter 1 (according to Appendix [(3) meter potential) and medium output, and then press the formula! 4) Calculate the mass M of the standard instrument or calculate the mass flow measured by the standard instrument according to formula (3). This is an indirect measurement method. It is best to select a standard density meter for variable measurement.
c, volume tube method and density meter: use the volume tube method to measure the volume Vs (calculated according to the attached calculation) and the density value \ through the flow meter 1. Calculate the mass M of the standard instrument using formula (4) or calculate the mass M measured by the small standard instrument using formula (3). Mother flow year, this is to measure the method: it is best to choose the line density meter,
d. Standard meter method: use the standard flow meter as the standard to compare with the flow meter 1: it is best to choose the standard flow meter of the same type as the flow meter 1, with the same specifications. 13.1.2 Orange Chu rate
currency method, the flow charts of the internal calibration of the density meter, the volume tube method and the density meter are shown in Figure 1, Figure 2 and Figure 3 respectively.
The following is an example:
a, start the program and open valves 2, 6.9, 1 at the same time to make the flow longer. Test the program in the system cycle, h. Adjust valve 6 to adjust the flow to qx, run the lock, and reset the independent timer;. Replace the reversing device with a bypass pipe, close 10, eliminate the excess of the weighing container, start the reversing device to replace the weighing container, and at the same time use the timer and flow meter [or meter ball, flow bean, mass plate);
e, when the set time is reached, the water mark is replaced with a bypass pipe, and then the stop timer f is used to determine the final positive mass of the flow meter, and at the same time record the pulse number (or mass flow) of the flow meter 1, the timing time and the blueness (medium, environment), pressure user, 2, only accept the inspection and the overall record: &: Use formula (2) to calculate the mass method to obtain the medium mass M flowing through the flow meter = m-mi
wide flow meter
cut-off time
just stop
to the scale juice
J.JG H97—1995
thermometer
exchange device
figure quality calibration flow chart
juice resistance device
you naturally good absorption meter
benefit spot
my limit
thank you 2 Ben visual method calibration process range
press to the
floor stop road
h. The actual mass of the medium Ms is calculated according to formula (1) or (2) in Appendix 1. Flow indication 4 is calculated according to formula (3); i. Repeat bh and do two more steps:
regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat -i until the calibration is completed:
13, 2 Flow rate 2 calibration
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 8Repeat the process for two more steps:
Regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat until the calibration is completed:
13,2 Flow rate calibration 2
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 8Repeat the process for two more steps:
Regulating valve 6, adjust the core flow base to 0.5, (.24 and then to 4. Repeat until the calibration is completed:
13,2 Flow rate calibration 2
13.2.1 Flow meter 2 indication calibration The first level adopts daily accumulation method plus density meter, standard subsurface meter method, V7 method, etc. 6
Pass the German version
Make the version
JG B97-1995
Standard volume receiving
Pressure measuring
(number) instrument
Figure 3 Flow chart of the volumetric tube method
Measurement area meter
Thermal measuring switch
Measurement design
Playing rescue meter
Measurement verification meter
Zhentongma
3 Volumetric method is matched with density sensing method: Use the volumetric method to measure the volume value of the standard instrument of the volume meter 2 and the medium density value Ps, and then calculate the mass Ms or flow rate measured by the standard instrument according to formula (4), with a soap film test gas flow standard slurry device and a bell-shaped gas flow standard device. A gas flow standard device with temperature and pressure force P is obtained, h, standard method: the standard flow meter is used as the standard and compared with the meter in 2. The standard flow meter is preferably selected from the flow meter 2 with the same type and specification, and the flow meter is used for performance. For other matters, please refer to the textbook 643-1994.
tVTI method: the mass and temperature change of the gas in the container with known volume are measured to obtain the mass 13.2.2 Verification procedure
Use the uniform product method to add density meter, the verification flow chart of the standard table method is shown in Figure 4, Figure 5, and Figure 6 respectively. The following takes the soap film flow standard filter as an example: This device is mainly used for small gas and small volume flow (not exceeding 12[1./m), a, outflow Select a good soap, wash it clean, and connect the system according to Figure 4;
b. Adjust the flow rate to the maximum of 4mx by valve 6, run for 10min, and let the timer (or stopwatch) repeat; squeeze the ball to form a film from the liquid, and the air pressure will drive the soap film to rise at a uniform speed along the soap film. After running for a few seconds, start the calibration:
d. Gently squeeze the rubber ball to form a film. When the film rises to the lower mark of the film tube, start the timer (or stopwatch), and the counter (or flow, quality) recorder: e. When the soap film reaches the upper mark of the film, stop the timing circuit (or stopwatch), and the counter (or flow meter) recorder; Flow meter
meter blue A
light volume crime
in, quality in) recorder;
1. Chongyoushan again the most twice:
JJG897-1995
creation is meter
control cost
type light installation repair
on H device
national military type flow rate look at the calibration process diagram
cargo than the density ball
. Record the measurement time, the volume of the mold tube, the temperature of the mother meter and the installation 9, force; meter
and the source
l according to Appendix 1 formula (5) to calculate the single-mode method to obtain the standard instrument volume signal V of the mother card 2. And density value: connect formula (4) to calculate the quality Ms: connect formula (3) to calculate the quality base s; 8
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