Verification Regulation of Digital Temperaure Indicators and Controllers
Some standard content:
The People's Republic of China National Order Verification Regulations JJG617—1996
Digital Temperature Indicators and Controllers
1996-09-12 Issued
1997-04-1 Implementation
National Technical Supervision Bureau Issued
JJG617—1996
Verification Regulations of Digital Temperature Indicators and Controllers JJG 617—1996
Busy for JJG 617-1989
This standard is approved by the user's technical supervision department in 2009 and will be implemented from April 1, 1997:
Responsible unit: Shanghai Technical Supervision Department
Drafting unit: Shanghai Municipal Planning and Technology Research Institute The unit that drafts the technical provisions of this regulation is responsible for interpreting the main drafters of this regulation:
Zhu Jialiang
Lu Bubiwww.bzxz.net
Xin Jia Drafting person:
JJG 617-1996
(1 Shanghai Planning and Technology Research Institute)
([Shanghai Planning and Technology Research Institute)
[Hangzhou Qianjiang Instrument and Meter! ）
【Youpinfeng Gongshanzi Instrument】
(Hangzhou Quality Assurance Center)
Technical requirements
Verification conditions
Verification objectives and verification methods
Result processing and verification cycle
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Terms and definitions
Verification method selection table
JIG617-1996
E of different scales of thermoelectric and thermoelectric positive, 2. The value of
The limit of the displayed value measured by stopwatch
and R,
Appendix 6 The effectiveness table of proportional control The calibration of the proportional band is relatively accurate The calibration of the set point error is attached: Example, re-adjustment time, graphic method of calibration of the question B Digital temperature indicator regulator calibration record format (
(（20）
（24）
JJC617—1996
Verification procedures for digital temperature indicator regulators
This procedure is applicable to new manufacturing: Use Chuanzhong and Xiu The digital temperature indicating and indicating regulator which is matched with the thermocouple and the thermal resistor after processing and has analog-to-digital conversion is also suitable for the specification of the digital temperature indicating and indicating regulator which takes DC self-flowing and electric power as the analog. The digital temperature indicating and indicating regulator (hereinafter referred to as the instrument) includes desktop, panel-mounted and portable instruments, which are generally equipped with thermocouples or thermal resistors to measure the temperature, and are assisted by the phase point resistance to form a computer control system to accept the standardized analog DC signal or the sensor which generates the resistance change. The instrument can measure and control other physical objects:
According to the working principle, it can be divided into two types: without microprocessor and with potential microprocessor: the principle diagram is shown in the figure "control
nonlinear correction
wide comparison
evaluation code, dynamic verification. The display
Figure 1 also indicates the original number of the medical instrument
without microprocessor, usually realized by operational amplifiers and medium and large-scale integrated circuits: with microprocessor, it is implemented by software. According to the difference in the principle diagram, the control mode signal can be divided into two categories: intermittent (switch signals such as relay protection points) and continuous (such as -10A and 4-21A DC multiples. According to the regulation specifications, the passband is in a positional manner, time ratio, ratio measurement, integral differential (), etc.,
2 Technical requirements
() Instrument indication part
1 Appearance
The appearance and structure of the instrument should be intact: the name, model, specification, measurement range, graduation number of the instrument, manufacturer 1
JJG 6171996
The name or trademark, serial number, and year of manufacture should all be clearly marked. 1.2 The external parts of the instrument (terminals, panels, switches, etc.) should not be loose or knocked. The display panel should not have defects that affect the readings.
1.3 There should be no signs of moving parts inside the instrument when the meter is tilted. 1.4 Each switch should have its corresponding function and a certain adjustment range when it is in the specified state. 1.5 The instrument display value should be clear, without missing characters, and the brightness should be uniform. There should be no incomplete or missing strokes, etc. The decimal point and the overload status display should be correct. 2 Insulation resistance
In an environment with a temperature of 15-35 and a relative humidity of 15-35, the display value should be clear and have a uniform brightness. There should be no incomplete or missing strokes, etc. The display value should be clear and have no incomplete or missing strokes, etc. The display value should be clear and have a uniform brightness. There should be no incomplete or missing strokes, etc. The display value should be clear and have a uniform brightness ... Under the condition of 45%-75%, the insulation resistance between the power, input, output and grounding terminals (or casing) of the meter [except the input terminal and output terminal are not isolated] shall not be less than 202
3 Absolute strength
Under the condition of environmental degradation of 15-35℃ and relative humidity of 45%-75%, the test voltage specified in Table 1 is applied between the power, input, output and grounding terminals (or casing) of the meter (except the input terminal and output terminal are not isolated) and the power is maintained without breakdown. 4. Basic error 2
The allowable basic error of the instrument can be expressed in three ways. Table 1
Our belt Bi Le Gong you compensate (V)
GO: 130
13U<250
Use the table containing the leakage accuracy level as the formula
4-+a%FS
Test stock voltage (V)
Where: One-to-one allowable basic error () (should be rounded to the last digit and the resolution mechanism): One-to-one: select the maximum number as 1,.2, (3): 0.5: 1. Center; FS—The range of the instrument, that is, the difference between the recording range and the limit (), expressed in a way related to the instrument range and resolution 4.2
4 =±{FS-)
Formula: —The resolution of the instrument display! 【：
--Except the basic error, the maximum comprehensive error coefficient, the slope fee is the same as the 《, only when the user is not below 0.1 FS, the small can be used as an accurate number. 4.3 Use the allowable temperature error value expression
Only the small program opens the modification
Output protection body
In the war: 2
JK:617
Allowable temperature error value ()
Discussion and try to invite the last digit, the number sequence corresponding to the input change constant (change the chips into the corresponding temperature carefully) to meet the following requirements:
5.1 When>2, it is not proved that we,3: The lower limit value of this table is less than 0, then the point! The value should not exceed 2 (
2.1% when 2S, should be less than 11=5: the lower limit is less than 0, then the upper limit should be less than 12 1.
.35,1%F instrument can not be verified for this purpose. Stability design
center 1 display labor wave crack
1.1 false table small detailed work to the rate of counting the hall jump. 6,12 display careful wave intensity does not receive part of the force, and for the high resolution instrument (< center .1a FS!, the main wave can not be counted two components. The wave before the world is the large deviation of the wave value Small German workers, 6, 2 standard time display ticket shift, 11 within the value of the flow shift does not rely on the person under the allowable recognition error of 14:7 continuous operation
no meter in 24h continuous work, its error should meet the requirements of the following 4 items. () Instrument booth control part
8 set point recognition scheme
8.1, analog side I set the instrument, its set virtual recognition error 4, into the whole through the formula (4) requirements: 4.-1W
digital way no set instrument, its point error should not be through the formula (5! The requirement, 8.2
4=±t%FS +)
8.3 The digital method is to set the table, and its setting value can be measured. The monthly setting point difference is used to represent the image of the set control point. The expression of its allowable value is the same as formula (5) 8.4 The maximum comprehensive error coefficient of the set point is always equal to and equal to. 9 According to the book
91 The difference should not be collected; the table of the night of the scale 1 should not be in [9.2 The table can be replaced by the word, and the requirements of the replacement difference can be met: the replacement difference setting Calibration value of the instrument: Unless otherwise specified by the manufacturer, the set value is allowed to be raised. The version of the reverse switching difference set value is the first (, the village question is the moment control part
10 set point error test
10.1 analog reporting mode is set to the instrument, H set point setting difference 4, the result should not easily exceed the requirements of formula (6): 4: =-ea%FS
10.2 digital mode I set the instrument, the set point reading difference 4, should not tend to meet the requirements of formula (7): 4,-1(%s+)
J.IG 611—1996
10.3 For the meter set in digital mode, if the setting can be quantitative, the deviation of the fixed point can be characterized by the fixed point deviation. The expression of its allowable value is the same as that of formula (). 10.4 Assume that the maximum comprehensive error coefficient of the point is 3, the passband and! , u, etc.: I proportional band
11,1 The proportional band is a meter with fixed values. Its rated value has a band of 4, 10, 20%. The actual proportional band should be within the range of (1+0.25)P: minimum +0%: the actual proportional band should be within the range of (1+0.5)P (for the rated proportional band!
The instrument with a proportional range value should be within this range. 11,2 For the meter with adjustable proportional band, the upper and lower limits of the actual proportional valve band should be able to cover the range, and the instrument with proportional band setting scale value The difference between the actual proportional band and the set value of the proportional band shall not exceed 1/4 of the set value; for a proportional band less than 10%, the maximum value shall exceed 1/2 of the set value. 12 Zero cycle || tt || 12.1 The zero cycle is a fixed value. Its micro-set value band is 2.5, 5s, 1U8, 20s, 30s, 40s, 50, and 60s. The actual zero cycle less than 10 (including 10) should be within (1+(.5). Within the range: the actual zero cycle of 20s (including 20s) should be within (1+0.5). . Within the Fan Jia (for zero cycle) instruments with seasonal range values: the actual case cycle should be within this range. 12.2 For instruments with adjustable periods, the upper and lower limits of the actual standard cycle can actually cover the adjustable range: for instruments with zero cycle setting scale values: the deviation between the actual required cycle and the zero cycle setting value (except for manufacturing and regulations) generally does not exceed 1./4 of the setting value: for zero cycles less than 10s, the maximum deviation is no more than 1/2 of the setting value. For instruments with automatic readjustment, when the deviation is When, only the signal is received and then adjusted, the time ratio of the input should be within -1, which can be changed.
The instrument that can be stored in the dynamic and re-excited side does not need to be tested for the point error. (IV) Instrument continuous and intermittent (one-position) proportional and differential control part 14 static error
14.1 The static error of the instrument set by the model withdrawal method shall not exceed the requirements of formula (K) 4-FS
14,2 The static error of the instrument set by the number left or set shall not exceed the requirements of formula (9). 3,==(a,%FS1 5)
14.3 The maximum comprehensive error coefficient u in the steady state of the output is usually equal to. 15 Extraction and output step response
15.1PIL continuous control meter when the output load is 1k (output is [mA-1)mA instrument) or 50 (output is 4mA·-21A instrument), its output current ratio is (0.-J0)mA, or (4-20)m4 limit, the lower limit value error does not exceed +1 of the output range, PII) intermittent control meter, the output discrimination ratio of on and off (or high and low levels): 0·-1.15.2 The output step response ear has a proportional, visual, differential box characteristics: the output characteristic curve is shown in Figure 2,
forward characteristic mountain practice
JJG: 617--1996
Reverse curve
(in reality, P is the continuous power transmission, and P is the time ratio of intermittent power transmission): 16 Proportional band
16.1 For this example, the proportional band is a fixed value instrument, and the actual proportional band should be within the P range of (1-0.25): The bottom of the proportional band is less than or equal to 10 years and is within the range of (11-0.5), or within the range of: The P of the intermittent PID instrument is doubled: 16.2 For the commonly used adjustable instruments, the upper and lower limits of the actual proportional band should be able to cover the adjustable range. For the instruments with proportional band set scale values, the actual deviation from the proportional band set value shall not exceed 0.5 of the set value (P is 5%-10%) unless otherwise specified by the manufacturer: The intermittent PID instrument generally does not exceed 4/5 of the set value. 17 Re-adjustment time (only time-sharing)
17.! For instruments with fixed readjustment time, the actual readjustment time shall be within the range of (1±0.5)T or the specified range. For instruments with fixed pre-adjustment time, the upper and lower limits of the actual readjustment time shall be able to cover the adjustable range. For instruments with fixed calibration values, the actual readjustment time shall not deviate from the set value of the readjustment time. Unless otherwise specified by the manufacturer, it shall generally not exceed 0.5 (T, for 2min) of the set value. For other instruments in the PIT section, the actual readjustment time shall not exceed 0.8.18. Differential time 1
18.1: For instruments with fixed pre-adjustment time, the actual readjustment time shall be within the range of (1±0.5)T or the specified range. 18.2 For instruments with adjustable preset time, the upper and lower limits of the actual preset time should be able to cover the range of adjustment. For instruments with preset time and no calibration, the actual preset time and the preset time are not directly different, unless otherwise specified by the manufacturer, and generally exceed 0.5 (in hours) of the set value. 1&.3 Instruments with intermittent PID control cannot be calibrated for this project. III. Calibration conditions
Calibration equipment
The actual requirements and equipment required for the instrument to be tested are shown in Table 2. The total uncertainty of the selected calibration instrument, including the entire calibration equipment, should be less than 0.2 of the allowable error of the instrument under test. The uncertainty of the instrument under test with level 0.1 should be less than 13 of its allowable error. 20 Environmental conditions and small conditions
20, "Ambient temperature: (212[0,5 level 1.0 instrument ring temperature is 2015) Serial number
Civil section name
Ring point current voltage ticket ||tt ||: or DC low potential electric
position room let
DC standard current source
digital self-piece table
on the generator
jiang said electricity to sell
compensation level line and
gate th resistance
a frame false combustion filter
rate synchronous multilateral energy
JJG617—196
1. Carbon shortage small About the difference between the measured value and the measured value: the measured value should be 1.2, with a resolution of 2.0, and a DC potential difference meter signal. When the DC potential difference meter signal is used, its impedance should not be greater than 1000. 1. It can be connected to the auxiliary signal U8m. 2. The current wave should be stable and small, so that the resolution is within one. The standard guarantee error of the last digit of the
mother grade of the test instrument is less than 0.2, the
compensation wire of the test meter has a small resolution of 20T, the resistance value of the three connected
wires cannot exceed 0.1. The meter allows the reading to be changed according to the procedure
//. The standard of the traditional creation section is 1.005 -0.995. The allowable error is 10.001. Test analyzer (. Value measurement: white automatic position (long picture) shrinkage resistance meter. Small size is not large. 1. Measured range: 0-101AX (-- 20 m1 JX
Strictness: 0.3 level
Paper ball seat is not held for more than 2min
Ring output voltage: 500VDC.1V1K
Strictness: 1 level
And method, electric power transmission
personal meter calibration
your standard instrument
equipped with thermal and electric power
electrical input type instrument
calibration standard
its right reference end temperature|| tt||Figure micro compensation instrument inspection
fixed piece abandoned connection practice
hundred! First line board thermal resistance
This is in the correct connection
Ha Zong time ratio instrument
1. When determining H with reference shop
identification and compensation model instrument
table, the standard change pipe
hou steaming should live compensation and
my ice hunting protection error good
(±0.25)
2. Check the current low potential potential difference meter is not male standard clinic number source question use value is not correct package refused to manufacture technical wire production 0-50 matching I) continue: the setting of the equipment clothing point recognition process, the price response, static film measurement shrinkage current machine does not scan print #.5
Record level response
Testing rules
Level related standards
Electric current meter
Equipment name
Wuhan Inspection and Quarantine Company
AC running voltage
JJG617—1996
2 (for)
Technical requirements
Output voltage: (01V
Rate: (45 -55: =1z
Raising power: minimum 0.25
Dushan voltage: 220V
Starting frequency: low W
Electric temperature: 1%
20.2Relative temperature: 45%75%:
Test accuracy
Power supply for meter
203Power supply for meter: voltage change does not exceed 1% of the rated value; frequency change does not exceed 1% of the rated value
20.4: Except for the geomagnetic field, there are no external field verification items and verification methods that affect the verification of the instrument.
Verification items
This meter's verification items are shown in the figure.
Set type
Verification items
Type
New design
After verification
Definition:
The whole book
Proposal
The indication part of the meter
The quality of the instrument
Indicates the position control
Setting standard
|tt||The meter can be adjusted
Change the light point error
FI interval example
Control all
Manual re
Pi control part
Output by and hit
Use a copy of the street version
Test time
Adjust time
(I) After the meter indicates the part of the pull
22 Appearance inspection
JJG617—1996
According to the requirements of the 1st clause of the situation, use H force inspection: 1.4 and 1.5 items can be in the basic difference and set point Observe the error during the calibration process.
23 Insulation resistance calibration
The power switch of the instrument is in the on position, and the ends of the circuit are regulated. For the instrument with a power supply within the range of (50500)V, it is necessary to use an insulation resistance meter with a rated DC of 500V (for instruments with a power supply less than 50V, use an insulation self-insulating meter with a rated DC of 100V). Control the temperature of the specified part in the third paragraph: when measuring, the bottom is stable at 5, and read the insulation resistance.
24 Insulation strength calibration
Instrument When the source is connected, short-circuit each circuit, and measure the voltage on the withstand voltage tester according to the specified position of the three lines. When measuring, the voltage should be reduced as needed, and the voltage should be evenly reduced to the specified position in the test within (510)3 (the error is not more than 10 years). After maintaining for 1n, the voltage should be smoothly reduced to the same level, and the test source should be disconnected:
Note: In order to ensure that the test measurement does not require the start of the test, a warning device can be used to set the value of the alarm or test: Generally, 1A is used to make the monthly value ten, so as to report the meal as a record. 25 Caomuxi error calibration
5.1 According to the provisions of the line
5.E.1 The instrument with self-compensation at the end of the test is connected as shown in Figure 3. Compensation line
Standard DC source
(current potentiometer)
Pin conductor
DC density
generator
Standard digital voltmeter
or DC: L pull difference meter
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