JJG 974-2002 Verification Regulations for Cement Softening Equipment Measuring Instruments JJG974-2002 Standard download decompression password: www.bzxz.net
This regulation is applicable to the finalization and appraisal, prototype test, initial verification, subsequent verification and in-use inspection of cement softening equipment measuring instruments.

National Metrology Verification Standard of the People's Republic of China JJG 974—2002 Measuring Instrument for Cement Bright Degumming Equipment Issued on 2002-11-04 Implementation on 2003-02-04 Issued by the General Administration of Quality Supervision, Inspection and Quarantine JFJG 974—2002 Measuring Instrument for Cement Bright Degumming Equipment JJG 974
This regulation was approved by the General Administration of Weight Supervision, Inspection and Quarantine on November 4, 2002, and came into force on February 4, 2003.
Responsible for: National Technical Committee on Vibration and Shock Tachometers Main drafting unit: Beijing Institute of Measurement and Reform This regulation is entrusted to the National Technical Committee on Vibration and Shock Tachometers Main drafters of this regulation:
Li Xuerui
Sun Luxin
Yang Wenwu
Additional drafters:
Fan Jianwu
J.IG974—24M2
(Beijing Institute of Measurement and Reform (Beijing Institute of Metrology)
(Beijing Institute of Metrology)
(Beijing Institute of Metrology)
(Beijing Institute of Metrology)
User's Manual
Basic performance requirements
General technical requirements
6.1 Appearance and accessories
Technical specifications drawn up by the manufacturerWww.bzxZ.net
Adaptability to the measuring environment
Electromagnetic compatibility requirements for measuring instruments
6.5 Adaptability requirements for measuring sources
Control of measuring instruments
Type identification or prototype test
.JJG 974—2002
Handling of initial verification, final verification and in-use verification results
Verification cycle
Format of the inner page of the verification certificate
1 Scope
JH: 974—24MI2
Verification procedure for cement softening equipment measuring instrument
This standard applies to water humidity measuring instruments (water-wet measuring instruments), sample inspection, initial inspection, continuous inspection and use-1 Inspection 2 References
229x—194!
Intended use and questions, Terminology
2422—1995
Terminology for environmental testing of electrical products
2421.5—1995
1 Environmental testing of electrical products - Part A: Test methods and procedures Director Liu: Initial
Self-production of Meng I cover the first part: test method 2423.tr—1995
Test and guidelines: industry collision
6587.1--1986
6587.2—1986
6587.4—1986
6587.5--1986
17626.2-1998
17626.3 -1998
Neutron tester
Environmental test summary
Neutron tester
Temperature test
Measuring instrument
Humidity test
Electronic instrument
Dynamic test
Electronic product instrument
Electronic test
Compatibility test: test and measurement technology
Electrical field immunity test
17626.4 -1998
Electrical field: test and measurement technology
Electrical rapid condensation group heat resistance test
17626.5 -1999
Electromagnetic detection and measurement technology
Hongjiang (Chongyun) Dynamic disturbance test
1726.11—1999 Electromagnetic penetration test and measurement technology Immunity test for temporary dips, interruptions and voltage changes 676—2000
Working test calibration specification
1015—1990 General quality standard for standardization of equipment 18-[99G Water-mixed mortar vibration table calibration procedure 1105—24MX) Tachometer calibration procedure
Use the indicated procedure with caution! The above article is based on the existing effective requirements. 3. Terminology
Water-reducing dynamic testing equipment: a general term for equipment such as water-reducing sand and water-mixing slurry 1
Micro-longitudinal testing equipment
4. Overview
JJG:9T4-2M)2
Cement soft cement slurry length measuring equipment is a multi-parameter measuring instrument, which mainly detects the dynamic position and vibration frequency of the water-reducing dynamic testing platform, the stirring rotation speed of the cement slurry and the test time and other dynamic parameters: it is composed of piezoelectric sensors, photoelectric speed sensors and signal processing and display parts.
5 Metrological performance requirements
5.1 Measuring instrument perturbation velocity sensitivity expansion uncertainty (in the range of 40-10): 3 bags (-2) 5.2 Measuring probe digital indication error: no more than 1.0%; 5.3 Measuring instrument vibration amplitude indication error (in the range of 45x-55Hz): no more than 1.5; 5.4 Measuring instrument rotation indication error (in the range of 60r/min-999.9/min): no more than 1.0%; 5.5 Measuring time indication error: no more than 0.1% (General technical requirements
6.1 Appearance and accessories
.11 The test equipment should have a complete brand, indicating the product name, specification, model, manufacturer, date of manufacture and manufacturer, and the manufacturer's license and its scientific and technical documents. G.12 The test equipment should be complete and all connectors should have instructions. 6.1 The measuring keys, buttons, and buttons should be able to function normally and the operation should be flexible. There should be clear text or symbols to indicate the operation. The technical instructions should be clear and complete. 6.2 The manufacturer should provide the technical specifications of the test equipment. Acceleration end-frequency characteristics, vibration displacement value amplitude-frequency persistence and dynamic position response value nonlinearity and other technical indicators:
6.3 Test environment
6.3.1 Test instrument normal working environment
Humidity: (0-403: Humidity: (2090)5R1.6.3.1 Test instrument competition adaptability requirements
Test instrument environment quality requirements, according to G, a 986 Zhongchuan gathering requirements, 6.4 Test epidemic prevention and compatibility requirements
Test electromagnetic full customer safety requirements GB/T17626.2-1998, GB/T17626.3·--1998, GB/T17626.4—1998, GB/T17616.5—1999 and GB/T17626.11—1999. The instrument adaptability requirements are as follows: The instrument should work normally within the range of ±10% of the power supply voltage change. The meter control instrument production includes: finalization or prototype test, initial verification, subsequent verification and return to service inspection. 3. Finalization identification or prototype test 974—2002
7.1.1 Type identification or prototype testing shall be carried out in accordance with the requirements of J.IG1015—1990 "General Specification for Type Apparatus Testing".
7.1.2 Type identification or prototype testing shall be carried out in accordance with the requirements of J.IG1015—1990 "General Specification for Type Apparatus Testing". 1.7.1.3 Type identification or prototype testing shall be carried out in accordance with the requirements of J.IG1015—1990 "General Specification for Type Apparatus Testing". 1.7.1.3.1 Items 1 to 6 in Table 1 shall be carried out in accordance with Items 7, 2.2.1 of this Regulation respectively. 7.1.3.2 Environmental suitability test a) Temperature test b) Temperature test c) Wetness test c) Vibration test c) Impact and tilt drop ... |tt||Perform electromagnetic compatibility test according to the method of 1:H/16587.5-19K6. 7.1.3.3.
Perform electromagnetic compatibility test according to the method of 15/T17626.2-1998, (-H/117626.3-199x, GB/T17626.4-1998, 15T17626.5-1994 and 1117A26.11-1999. 7.1.4. The report of type inspection or prototype test shall be shortened according to the requirements of SS-1015199. 7.2 First calibration and subsequent calibration The purpose of the first calibration is to determine whether the performance of the newly produced measuring instrument meets the requirements of the type specified in its batch. The purpose of the subsequent calibration is to determine whether the measuring instrument meets the requirements after it has been calibrated and used within the validity period. The subsequent calibration includes the calibration within the validity period, the periodic calibration and the calibration of the repair user. If the performance of the measuring instrument is significantly affected after the repair and readjustment, the subsequent calibration shall be carried out according to the specifications. The purpose of the inspection during use is to check whether the calibration mark or calibration certificate of the instrument is valid, and whether the measurement status during the inspection has changed. The reading error exceeds the maximum allowable reading during use. 7.2.1 Qualified conditions
7.2.1.1 Environmental conditions
1) Temperature: (15-.25)℃, humidity: 75%RH2) Voltage change does not exceed 10% of the rated voltage: 3) No power source, magnetic field, gas or liquid is required on site. 2.2.1.2: Calibration instrument settings
1) Intermediate frequency comparison standard device:
2) Standard speed device: 0.1 number:
3) Electric stopwatch: Resolution: 0.019
7.2.2 Methods and inspection methods
JJG 974·-2002
First inspection, subsequent inspection and standard inspection items are shown in Table 1. Finalization or initial inspection, initial inspection, subsequent inspection and unique inspection items. Items
Appearance and time
Vibration state efficiency technology
Vibration problem rate indication reading difference
Vibration displacement loss constant indication difference
Speed ​​water loss tea
Time blood indication medical care
Competition virtual length
Child compatibility
Finalization monitoring home improvement prototype quality
Kidney second inspection "Heart continuous inspection! Those with " " in the table must complete the test, and those with: " are not allowed to complete the test! 。 7.2.2.1 Appearance and accessories inspection
Appearance, brand, connectors and other methods shall be used for inspection to check whether the Vimi bottom meets the requirements of Section 6 of this Regulation! .2.2.2 The vibration acceleration calibration shall be carried out on the medium frequency perturbation method standard device (hereinafter referred to as the device). First, connect the non-standard acceleration sensor and the standard sensor in series at the center of the standard operating table, remove the test device, and select the "acceleration" gear for measurement: turn on the power to preheat for 30 minutes: at a point within the rate range (not recommended) on the measuring instrument, read the measurement value when the vibration acceleration is given, and determine whether the sensitivity test is carried out based on the measured value. The calibration results shall comply with the requirements of Section 5.1 of this regulation. 7.2.2.3 The vibration frequency indication error detection shall be carried out by installing the sensor and connecting the test device according to the above method: within the working rate range of the measuring instrument The average vibration frequency value is: according to the rate of return, the value of the instrument's lifting and lowering rate is taken, and the formula (1) is used to calculate the frequency indication value of the first point:
in: one-point measurement single and double (point frequency value, H: standard installation consultation gives the first point root frequency value of the mountain, Hz, the maximum indication value of the station result is set, and it should comply with the requirements of Article 5.2 of the cloud plan. 7.2.2.4 The detection of the displacement cap value and the second difference (
technology "technical method for installing the sensor hunting and connecting the measurement, the measuring instrument plan Xietang selects the bone "position tax" when, the vibration points are selected 451, 5H, 55H: the basis for the measuring instrument to use the mutual process, the withering section needs to be accurate, give a vibration or C97422
should be stable, the clothing drink determines the maximum measurement three instrument dynamic maintenance standard indication, according to formula (2) calculation? Point vibration test ball situation value setting ticket: || tt||5-44×100%
Formula: A——The dynamic displacement indication of the dating instrument at the first point, (mu-A. The dynamic displacement indication given by the standard device is continuous, (mm),-r1 The maximum indication error of the result shall comply with the requirements of Article 5.3 of this regulation, 7.2.?.5 The inspection room for the indication error meter
The standard device is inspected and tested quickly. The door has no dedicated photoelectric sensor terminal. The support worker on the sliding cup note transfer installation of fake shoes plate of Thailand Li point, the transmission most device towing plan pong fake: receive the source, the case light rotten point is still, preheat 2mn, adjust the book standard dream into the installation Jin, the production of the continent presents the instrument brick continuous quantity, are about to select no less than 6 transfer violation values! Also refers to ", small items must be beautiful), according to the actual encounter Lang measurement presents the speed small value, receive the public discussion (3: the first, Jie speed small road with the difference: u-\\ws
Wu Zhong: - one Taolan proposed the first point of the small elimination, min: standard parts speed device through the mountain, point speed calculation, m: the result of the light error estimation, should be in accordance with this regulation 5.4 source request..? .2.2.6 time error calculation standard specification
use the electric meter to detect the degree of elimination of electric heat 2 certificate: can be used to measure the time piece and the ball meter inside the world! About, about 2 ~, for the installation of the amount and the timing meter, the period recorder asks you to display the ball meter directly, repeat the measurement with no less than 3 times, and receive the maximum value of the indication as the time indication: should not be given to the original process shear change request.
7.3 test three results
after three, meet the requirements of the welding test to receive the verification certificate, the verification certificate page see the system: after the structure: the learning process to send a small inspection notice, service accounting unqualified items. 7.4 Verification cycle
The test period is 1 unit, and the test period is 5 units.
Appearance Appendix:
Perturbation acceleration sensitivity:
Seismic frequency indication error:
Rate standard estimate 1
Leading saint indication low/Hx
Indication also related%
Report displacement value indication error
Vibration frequency/H||tt| |Standard temperature: (mr),
tea building),
small load normal%
speed display error:
standard temperature:min')
element value mm
immersion temperature/%
time small error:
calibration environment conditions: temperature
JJG974—2002
calibration certificate inner page format
C, condensation2. The vibration acceleration calibration is carried out on the medium frequency perturbation method standard device (hereinafter referred to as the device). First, connect the non-standard acceleration sensor and the standard sensor in series at the center of the standard operating table, remove the test device, and measure until the test base selects the "acceleration" gear: turn on the power and preheat for 30 minutes: at a point within the rate range of the test instrument (not recommended), read the measurement value when the vibration acceleration is given, and determine whether the measurement sensitivity is recorded based on the measured value. The calibration results meet the requirements of Section 5.1 of this regulation. 7.2.2.3 The vibration frequency indication error detection is to install the sensor according to the above method and connect the test device: within the working rate range of the test instrument, the average Send a few vibration frequency values: according to the rate of return, take the value of the instrument's lifting and lowering rate, calculate the frequency indication value of the first point according to formula (1):
: one-point measurement single and double (point frequency value, H: standard installation consultation mountain point root frequency direct, Hz, the maximum indication value of the station result is set, it should comply with the requirements of Article 5.2 of the cloud plan, 7.2.2.4 report displacement cap value indication value detection (
technology "described method to install the sensor hunting and connect the measurement, the measuring instrument plan Xietang selects the bone "position tax" when, the vibration points are selected 451, 5H, 55H: the basis for the measuring instrument to use the mutual process, the withering section needs to be accurate, give a vibration or C97422
should be stable, the clothing drink determines the maximum measurement three instrument dynamic maintenance standard indication, according to formula (2) calculate? Point vibration test ball situation value setting ticket: ||tt| |5-44×100%
Formula: A——The measuring instrument reports the displacement indication at the first point, (mu-A. The standard installation gives the displacement indication, (mm), -r1 The maximum indication error of the result shall comply with the requirements of Article 5.3 of this regulation, 7.2.?.5 The inspection room for the error meter of the speed indicator
The standard speed indicator is inspected and determined. The door has no photoelectric sensor end and is installed on the special support case for the sliding cup. The fake shoe tray of the Thai Li point is transferred to the device for delivery: the source of the case light is still, preheating 2mn, adjusting the book standard dream installation Jin, the production of the instrument brick is continuous, and about 6 speed violation values ​​are selected! Also refers to ", small item speed must be correct), according to the actual measurement speed value, the public discussion (3: the first, the speed difference: u-\\ws
Wu Zhong: -Yi Tao The first point of the proposal encounters a small elimination, min: standard speed device through the mountain, the point speed calculation, m: the result of the slight error of the estimated error, should be in accordance with this regulation 5.4 source requirements..? .2.2.6 Time error calculation standard specification
use the power transfer meter to detect the degree of elimination of power through the heat 2 certificate: can be used to measure the time piece and the ball meter inside the world! About, about 2 ~, for the installation of the timing meter, the period recorder asks you to display the ball meter directly, repeat the measurement with no less than 3 times, and receive the maximum value of the indication as the time indication: the observation process should not be changed.
7.3 The third result of the inspection is
, and the test results meet the requirements of the welding process. The certificate is issued. The certificate page shows the structure: the certificate is issued. The key points of the inspection are small, and the service plan indicates the unqualified items. 7.4 Verification cycle
The test period is 1 unit, and the test period is 5 units.
Appearance Appendix:
Perturbation acceleration sensitivity:
Seismic frequency indication error:
Rate standard estimate 1
Leading saint indication low/Hx
Indication also related%
Report displacement value indication error
Vibration frequency/H||tt| |Standard temperature: (mr),
tea building),
small load normal%
speed display error:
standard temperature:min')
element value mm
immersion temperature/%
time small error:
calibration environment conditions: temperature
JJG974—2002
calibration certificate inner page format
C, condensation2. The vibration acceleration calibration is carried out on the medium frequency perturbation method standard device (hereinafter referred to as the device). First, connect the non-standard acceleration sensor and the standard sensor in series at the center of the standard operating table, remove the test device, and measure until the test base selects the "acceleration" gear: turn on the power and preheat for 30 minutes: at a point within the rate range of the test instrument (not recommended), read the measurement value when the vibration acceleration is given, and determine whether the measurement sensitivity is recorded based on the measured value. The calibration results meet the requirements of Section 5.1 of this regulation. 7.2.2.3 The vibration frequency indication error detection is to install the sensor according to the above method and connect the test device: within the working rate range of the test instrument, the average Send a few vibration frequency values: according to the rate of return, take the value of the instrument's lifting and lowering rate, calculate the frequency indication value of the first point according to formula (1):
: one-point measurement single and double (point frequency value, H: standard installation consultation mountain point root frequency direct, Hz, the maximum indication value of the station result is set, it should comply with the requirements of Article 5.2 of the cloud plan, 7.2.2.4 report displacement cap value indication value detection (
technology "described method to install the sensor hunting and connect the measurement, the measuring instrument plan Xietang selects the bone "position tax" when, the vibration points are selected 451, 5H, 55H: the basis for the measuring instrument to use the mutual process, the withering section needs to be accurate, give a vibration or C97422
should be stable, the clothing drink determines the maximum measurement three instrument dynamic maintenance standard indication, according to formula (2) calculate? Point vibration test ball situation value setting ticket: ||tt| |5-44×100%
Formula: A——The measuring instrument reports the displacement indication at the first point, (mu-A. The standard installation gives the displacement indication, (mm), -r1 The maximum indication error of the result shall comply with the requirements of Article 5.3 of this regulation, 7.2.?.5 The inspection room for the error meter of the speed indicator
The standard speed indicator is inspected and determined. The door has no photoelectric sensor end and is installed on the special support case for the sliding cup. The fake shoe tray of the Thai Li point is transferred to the device for delivery: the source of the case light is still, preheating 2mn, adjusting the book standard dream installation Jin, the production of the instrument brick is continuous, and about 6 speed violation values ​​are selected! Also refers to ", small item speed must be correct), according to the actual measurement speed value, the public discussion (3: the first, the speed difference: u-\\ws
Wu Zhong: -Yi Tao The first point of the proposal encounters a small elimination, min: standard speed device through the mountain, the point speed calculation, m: the result of the slight error of the estimated error, should be in accordance with this regulation 5.4 source requirements..? .2.2.6 Time error calculation standard specification
use the power transfer meter to detect the degree of elimination of power through the heat 2 certificate: can be used to measure the time piece and the ball meter inside the world! About, about 2 ~, for the installation of the timing meter, the period recorder asks you to display the ball meter directly, repeat the measurement with no less than 3 times, and receive the maximum value of the indication as the time indication: the observation process should not be changed.
7.3 The third result of the inspection is
, and the test results meet the requirements of the welding process. The certificate is issued. The certificate page shows the structure: the certificate is issued. The key points of the inspection are small, and the service plan indicates the unqualified items. 7.4 Verification cycle
The test period is 1 unit, and the test period is 5 units.
Appearance Appendix:
Perturbation acceleration sensitivity:
Seismic frequency indication error:
Rate standard estimate 1
Leading saint indication low/Hx
Indication also related%
Report displacement value indication error
Vibration frequency/H||tt| |Standard temperature: (mr),
tea building),
small load normal%
speed display error:
standard temperature:min')
element value mm
immersion temperature/%
time small error:
calibration environment conditions: temperature
JJG974—2002
calibration certificate inner page format
C, condensation
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