Some standard content:
National Metrology Verification Standard of the People's Republic of China JJG 1002—2005
Rotational Viscometers
2005-09-05 Issued
2005-12-05 Implementation
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JJG 1002—200S
Verification Regulation of
Rotatianal Viscometers
JJG 1002—2005
JJG 215—1981
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 5, 2005, and will be implemented on December 5, 2005:
Responsible unit:
Drafting unit:
National Physical and Chemical Metrology Technical Committee
National Center for Standard Materials
This regulation is entrusted to the National Committee for Physical and Chemical Metrology to be responsible for the interpretation. Drafting person of this regulation:
Lv Zhong"
JJG1002—2005
【National Center for Standard Materials】
! Scope
2 Overview
2.1 Coaxial cylinder internal rotation viscometer
2.2 Single cylinder rotation viscometer||t t||2.3 External Rotational Viscometer
2.4 Cone/Plate Viscometer
2.5 Torque-Free Viscometer
3 Metrological Performance Requirements
4 General Technical Requirements
Appearance Requirements
4.2 Safety Requirements·
5 Control of Measuring Instruments
Verification Conditions
Verification Items
Verification Methods·
Handling of Verification Results
Verification Period
Appendix A
Appendix
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Basic Parameters of Viscometer
JJG 1002—2005
Brookfield viscometer tolerance calculation formula, and tolerance coefficient tableStormer viscometer measurement of coating viscosity value (Ku) and load value (g) conversion tableStandard viscosity liquid preparation methodExample
Calculation example of verification result
Uncertainty evaluation and calculation example
Rotational viscometer verification certificate form
Rotational viscometer verification result notification form (1)
1Scope
JJG 1002:2005
Verification Procedure for Rotational Viscometers
This procedure applies to the initial verification, subsequent verification and re-use inspection of rotational viscometers (hereinafter referred to as instruments). This procedure takes NDJ series, Brookfield, LV, RV, HA, HB, KU series, as well as FANN-35.NN-D6, cone/plate, blood viscometer, and Stormer viscometer as examples. The calibration of other rotational viscometers can refer to this procedure.
2 Overview
This procedure uses the relative method, that is, using a standard (Newtonian fluid) with a known viscosity to determine the viscometer band number or using the viscosity value of the standard liquid measured by the viscometer to be tested to compare with the standard value to verify (calibrate) the viscometer. The working principles of the viscometers covered by this procedure can be divided into the following types. 2.1 The measuring element of the instrument consists of a dial, a motor movable frame (motor housing), and an elastic light element (hairspring) installed between the pointer connected to the motor movable frame and the dial. The measuring element is suspended on a solid wire. A certain amount of liquid is added between the inner cylinder (rotor) and the outer cylinder installed with the same auxiliary. When the motor drives the inner cylinder to rotate at a constant speed, the viscous torque generated by the shear of the liquid causes the motor movable cabinet to deflect, and the elastic element generates torque. When the elastic torque is balanced with the viscous torque, the pointer points to a certain value on the dial, and the value is used to calculate the viscosity of the measured liquid and the rotor constant, such as: VxS-11, NIJ-79, NDJ-type rotary viscometer, etc. Its structure is shown in Figure 1. 2.2 Single-circular rotary viscometer
The synchronous motor drives the rotating shaft, balance element, disc and pointer through a speed change gear set or a stepping motor. The rotor rotates at a constant speed. The liquid to be measured is placed in a straight-type container of specified size, and the rotor is placed in its center. When the liquid is sheared, it generates a viscous torque, which causes the elastic element to deflect and generate torque. When the viscous torque is balanced with this torque, the viscosity of the measured liquid or the instrument constant is calculated by measuring the deflection angle of the elastic element: This type of instrument belongs to the coaxial circular cylinder internal rotation structure, such as: NDJ series, SMC series rotational viscometers, Bruukfeld viscometers, LV, RV, HA, HB, KII series rotational viscometers, B-type viscometers, etc. Its structure is shown in Figure 2. 2.3 External cylinder rotational viscometer
One end of the elastic element of the instrument is connected to the dial and the inner cylinder, and the other end is suspended on a stationary hanging wire with a pointer. The measured liquid is added to the gap between the inner and outer cylinders. When the motor drives the outer cylinder to rotate at a constant speed, the viscous torque generated by the liquid when it is sheared is balanced by the elastic torsional torque. The angle of deflection of the inner cylinder is indicated by the pointer on the dial. The viscosity of the measured liquid can be calculated according to the formula.
For example 1: FANN-35, ZNN-D6 The structure of the viscometer is shown in Figure 3. 2.4 Cone/plate viscometer
The structure of the instrument is: a cone with a certain cone angle is coaxially installed with a plate, and there is a small angle and gap between the cone and the plate, and the liquid to be measured is injected into the gap between the cone and the plate. The working principle of the instrument is the same as that of the coaxial cylinder internal rotation viscometer. For example: NxF-I type, Bronktield-CP series, E type rotation viscometer, etc. 1
Scale dial
Measuring spring
JJG 1002—2005
Motor and movable frame
Coupling 1
—Material
Pallet,
A reducer bracket
Cabinet 1 Coaxial cylinder internal rotation viscometer
Insertion mark 1
Jewel bearing
According to the case
Test filter cup
Figure 2 Single cylinder rotation viscometer
2.5 Torqueless viscometer
2.5.1 Special cone/plate viscometer
JJG1002—Z005
The cone is directly driven by a low inertia torque motor [or according to the principle of the motor] to rotate, and the viscosity of the liquid is measured by comparing it with the standard curve determined by standard substances of different viscosities. For example, blood viscometer. 2.5.2 Stormer viscometer
The instrument applies a certain mass load to the rotor through the transmission of pulleys and gears to make it rotate, and the rotor speed reaches 200 by increasing the load mass. r/min. Using the relationship between mass and viscosity, determine the load mass required to produce 200 r/rmin to calculate the viscosity or K' value. The calculation formula is shown in formula (5), and its structure is shown in Figure 4. The dial is sensitive to the window
Speed lever
Compliance indicator
Resistance 3 External rotary viscometer
Viscosity range and factory technical indicators are shown in Appendix A. 3 Measurement performance requirements
The instrument calibration results shall meet the requirements of Table 1:
Tachometer
Figure 4 Stormer viscometer
Table 1 Instrument calibration results Allowable error (relative error) Repeatability
Instrument model
NIJ series, FANN= 35,
ZNN-D6, cone/plate viscometer,
blood viscosity juice, etc.
Stormer viscometer
Reproducibility
Difference between nominal values
Instrument model
JJG 12—2005
Table 2 Allowable error (reference error) of instrument calibration results
Type B, Type E, NXS-I1, SNI-1,
NXE-1B, cone/plate viscometer, etc.
*: The calibration results of Stormer viscometer series shall be calculated according to Appendix B. 4 General technical requirements
4.1 Appearance requirements
Reproducibility
4.1.1 The instrument should have a nameplate, clearly indicating the instrument name, instrument serial number, factory number, measuring instrument production license, manufacturer name, power supply voltage, frequency, etc. 4.1.2 The instrument appearance should not have obvious damage or rust, the switch adjustment components of the instrument should be flexible, the instrument function keys should be installed firmly, accurately positioned, work normally, and the software information output should be correct. 4.1.3 The instrument rotation axis is concentric and flexible, and the rotation speed is uniform. The rotor should not be deformed, and its surface should not have obvious scratches. 4.1.4: When the instrument is driven to idle, the pointer should be at zero position. If it is not at zero position, it should be adjustable or corrected. 4.2 Safety requirements
Safety information that needs to be noted during normal use and maintenance of the instrument should be clearly marked. 5 Measuring instrument control
The control of the measuring instrument includes: initial calibration, subsequent calibration and in-use inspection. 5.1 Calibration conditions
5.1.1 Calibration standard substances (standard viscosity liquid, referred to as standard liquid) 5.1.1.1 National, secondary or internationally recognized certified Newtonian fluid standard substances should be used. 5.1.1.2 Standard liquid should be used once at a fixed temperature. 5.1.1.3 Standard liquid should be placed in a dry, light-proof, sealed glass bottle and stored at room temperature. 5.1.1.4 Standard liquid should be used within the validity period. 5.1.2 Ambient temperature: within the range of ±2 of the calibration temperature. Relative humidity: not more than 75% RH.
No strong electromagnetic interference.
5.1.3 Calibration equipment
5.1.3.1 Constant temperature equipment
At the calibration temperature, the temperature fluctuation should not be greater than 0,1C. For the calibration constant temperature bath without outer cylinder, the constant temperature zone depth should not be less than 130mm, and the diameter is (95100)mm. The thermostat used for the viscometer with outer cylinder or without outer cylinder and overflow sleeve should have the function of constant temperature liquid external circulation. 5.1.3.2 Temperature measuring equipment
J3G 1002—2005
Use glass thermometers or digital thermometers with a graduation value (or resolution) not greater than 0.5:. They should be calibrated by the metrology department before use.
5.1.3.3 External cylinder [applicable to the calibration of single-circular cylinder viscometers], cylinder containers with a diameter not less than 70 mm and a sample liquid level not less than 110 mm (applicable to NDJ series), straight cylinder containers with a diameter not less than 2.5 mm (applicable to Bronkfield series) or 85 mm [applicable to BH type), and a sample liquid level not less than 121 mm, and other containers with dimensions as required by the instructions. 5.1.3.4 Frequency meter
Frequency measuring instruments with a resolution not less than 0.5 Hz should be calibrated by the metrology department before use. 5.1.3.5 Other equipment
Balances with a sensitivity not greater than 10 m or graduation values not greater than 10 μL pipette, level, 110 V voltage regulator, hair dryer, lint-free cloth and organic solvents such as gasoline and ethylenediamine. 5.2 Verification items See Table 3 for verification items. Table 3 Verification items Verification items Instrument zero drift Only instrument repeatability Only instrument reproducibility, the difference between the nominal value of or the second verification is the value to be verified. Verification: 5.3 Verification method 5.3, 1 Preparation before verification Subsequent verification Verification during use The following is the main purpose: Repair the instrument, according to the requirements of the verification items, store the instrument under verification environment for 2 hours Clean the inner and outer cylinders and the sample plate with industrial solvent gasoline or organic solvent, and use a hair dryer or lint-free cloth to make the surface dry. 5.3.2 Installation of the instrument
Install the instrument on the support stand, and use the horizontal adjustment device to adjust the level of the measuring head. The digital viscometer should be turned on and preheated for more than 20mm. Connect the protective frame to the main machine according to the requirements of Table 4. When installing the rotor, use your left hand to support the shaft upward, and use your right hand to rotate the rotor to be tested in the clockwise direction (looking down at the machine head). Install the cone/plate viscometer, and use a drooping hand to load and unload the sample plate. Do not turn it horizontally in advance to avoid damaging the shaft and cone rotor. When the cone rotor of the blood viscometer is inserted into the shaft, avoid colliding with the shaft core. 5.3.3 Zero point and cone/plate gap adjustment
Instrument model
NDJ-1 Series
NDJ- 79
NXS-II (A)
Brookfield Series
ZNN - D6
FANN - 35
Stormer Viscometer
Chain/Plate Viscometer
Blood Viscometer
JJG 1002—2005
Table 4 External dimensions, liquid volume, and protection frame type of viscometer No.
1, 2, 3, 4
1，10，100
0.1,0.2,0.4,
Round type
Cylindrical type
Cone/Plate type
External dimensions
Not less than $7U mm, depth not less than 110 mm
Ⅱ unit with outer cylinder
Ⅱ unit special outer cylinder
System (outer cylinder)
Ultra-low viscosity special outer cylinder:
or not less than 82.5 rum.
Deep not less than 121 mm
Special outer cylinder
not less than ±82.5 mm
Deep not less than 121 mmz
Special matching cone/plate
Liquid container
about 15 rnl.
about 70 mL
about 60 mL
about 9mL
about 10 mL
about 12 ml.
About 16L (ultra-low
viscosity)
In addition 500mL
500 mL
The liquid surface is level with the
marking line inside the outer tube (about
400 mL)
1 mL; .8 mL or
According to the requirements of the instruction manual
According to the requirements of the instruction manual, adjust the point and cone/plate of the viscometer. 5.3.4 Loading
Protective frame type
Special for ultra-low viscosity;
Fixed type (LV series);
Wide type [RV series)
(Not available for HA and HB series)
BL; BM;
4 rotors (narrow type)
7 rotors (wide type)
Select the appropriate standard viscosity liquid from Table 5, and fill it into a container of specified size (special) along the inner wall of the container according to the liquid filling amount specified in Limit 4. For chain/plate type viscometer, when the sample viscosity is less than 500mPa·, use a sampler to add the sample. When the sample viscosity is greater than 50mPa-, use the weighing method to add the sample. When adding the sample, avoid bubbles in the sample tip.
Instrument model
NDI-I, NDI-5S,
NJ-9S,
BL etc.
NDJ-79 etc.
NDJ-4
NJ-&S
Rmokfield
LV series
Hmnktield
RV series
Brookticld
HIA series
J.IG 1(H2-—2H5
Table 5 Value range of the applicator and calibration standard solution (reference, number) Rotor number
F10 × 100 | | tt | |10 way 98%
10%~98%
Reference standard/(mPa*s)
200, 50
5 000. 000 | |tt | 000, 100 000
200,500
5 0. 000, 100 000)
40000,100 000
200, 2 000
2 00, 5 00)
5 000,g 000 | |Reference speed gear
6, 12
12,30,60
1.5, 3,6,12
6, 12, 30, 60||tt| |6, 121 30, 60
3, 6, 3, 60
12, 30, 6
5,10,20, 50
20,50,100
5, 10, 20
2. 4, 5, 10
10, 21
10. 20,50, 10)
5,10,20
3, 10, 20, 50
5, 10, 20, 50
10, 20, 50, 10|| tt||20,50,100
Instrument model
Jrnakfield
HB series
Brnkfiel
(low viscosity)
BH series|| tt||BIBM Series
NXF-1R (catalyst/plate type)
Blood viscosity meter (special)
Stoner (ku)
2X- D6
FANN - 35
NXS - I1A Series
Rotor No.
JJG 1002—2005
Table 5 (continued)
. Value range
10%-98%
50% -98%
50% - 98 %
30~200 (division)
20 ~ 300 (minutes)
20%95%
Reference standard solution/（mPa-s）
5 000, 8 000
5 000: 8 000
8 000, 40 000
40 000, 100 000www.bzxz.net
40 0000.100 000
40 (X0, F00 000
200 00, 500 000
K), 1 (OC)
500,200
2 0M. S (H)
5 (X, H0)
8 000, 40 000
8 000, 40 000
40 000, 10 000
40 (000,10 0000
500. 5 000
5 000, 8 000
8 000, 40 (00
10: 100. 1000
10, 100, 100
10. 100. 1000
2,5,10,20. 30
: 500. 2 000
200,2)
500,1 000
500, 1 000
40 000, 100 000
40 000, 100 000
100000
parameter speed gear
10,20,50||tt ||10,20.50,100
10,20.50
20.50.100
20.50. 100
Depending on the model, select
the speed that is close to the full scale
20,10, 4, 2
20,10, 4 , 2
20，10，4
20，10，4，2
20. 10, 4, 2
20.10,4、2||tt| |20，10
60，30
30. 3, 0.3
60, 6,0.6
60, 6, 0.6
3, 6 , 100, 200,2
20, 10, 4
20, 10, 4, 2
20. 10, 4, 2
20.10,4, 2
20, 10
60, 30
30. 3, 0.3
60, 6,0.6
60, 6, 0.6
3, 6, 100, 200,2
20, 10, 4
20, 10, 4, 2
20. 10, 4, 2
20.10,4, 2
20, 10
60, 30
30. 3, 0.3
60, 6,0.6
60, 6, 0.6
3, 6, 100, 200,
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