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Trial verification procedure for cantilever electronic belt scale.IG 560—1988
Trial verification procedure for cantilever electronic belt scale
WerificatinnBtrguhetion nf SnspendHand Electronicnlc eliseale
J.IG-198
The standard procedure was approved by the State Bureau of Metrology on April 9, 1988, and was put into implementation on January 1, 1989. Responsible unit: China Institute of Metrology Drafting unit: Hangzhou Standard Design Institute
The drafting unit of this procedure is responsible for the interpretation of the technical content of the document. The main drafters of this regulation:
Equal water approval (for state and city standard metrology quality)
Zhu Xing (Hangzhou City Measurement Bureau)
Participating drafters:
Luo Guangsheng (China Measurement Science Research Institute)
Feng Yanchu (Hangzhou Building Materials Equipment Factory) 1439
Technical requirements
Verification conditions
Pulling items and verification force method
Verification result processing and verification cycle
Record 1 Initial record format
Verification results
Appendix 2
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Trial verification regulations for suspended electronic belt scales
This standard is suitable for new manufacturing in Hangzhou. The crown number style during use and after use is based on the annual belt evaluation (with flow beads Belt scales should be manufactured in accordance with national standards and relevant technical documents, and the accessories should be in accordance with the relevant drawings: 2.1 ... There is no friction and it is solid. The belt tensioner is adjusted and installed. The lifting and roller should be tangent to the belt in the plane. The straightness error should not be greater than 0.5r; the radial gauge of the roller should not be less than 10.31mT, and the transmission error should not be greater than 0.2mm. 3.3 The annular leather joint must be used without a joint. The thickness of the joint cannot exceed 1/10 of the thickness of the ring bead. 4 Weighing car sensor
The weighing sensor must be sealed, and there should be no looseness on the outlet. The technical level of the corresponding monitoring sensor (or single sensor) meets the technical requirements of the verification regulations and meets the requirements of the measurement accuracy of the scale. 5 Basic control instrument
5.1 The appearance of the measuring and control instrument is complete and the surface is intact. All signs and symbols should be clear. 5. 2 Each control pin, knob, and meter should be installed with a semi-circular design, especially the dynamic image, and can be operated freely. 5.3 The flow display and metering value display should clearly indicate the measurement position. The flow unit is g/s, kg/min or :/h: the cumulative value is used or t
5.4 The flow rate should comply with the recording unit expressed by the following formula, and the numerical value should be: [: 10, 2×100\, where it can be an integer: a negative integer or the like, F machine parameters
6,1 Effective flow of belt rating: calibrated (201 music) 6.2 Sensitivity
h.2.1 Pre-state sensitivity
When the belt is not running properly, the effective gate is .2% of the rated flow minus (1), and the 3min cumulative value of the belt rate is read, which should be clearly distinguished from the cumulative value when the scale is empty. 6.2.2 Dynamic sensitivity
When the belt is in normal rotation, the small code of 0.4% rated flow load (): At this time, the 3in cumulative sequence of the belt group is different from the calculated value when it is accompanied by the product. 6.3.1 Static linear seat 6
When the belt is not rotating, measure the static change, and its value shall not be greater than 6.5.2 Dynamic linear avoidance 8
When the belt is stopped, measure the dynamic repeatability, and its value shall not be greater than +1%. 6.4 Dynamic modification
6.4.1 Dynamic sensitivity "
When the belt is not rotating, measure the static repeatability, and its value shall not be greater than 6.5.2 Dynamic repeatability*
When the belt is in normal rotation, measure the dynamic change Its value shall not be greater than 6.5.1 When the belt is running at no-load end, the stability of the short-term stability (about 3min) of the point shall not exceed 0.007% of the fixed flow value. 6.5.2 When the belt is running at no-load, the 3h stability of the point shall not exceed 0.009% of the 1h fixed flow value. 6.6 Calibration accuracy of products 6.6.1 For the evaluation of newly manufactured and used belts, the calibration accuracy of the materials shall not exceed 1% within the effective flow range. 6.2 For the belts in use, the calibration accuracy of the materials shall not exceed 2% within the effective flow range. Second, the calibration conditions 7 Stable environment requirements Environmental smoothness: U~351: t||7.2 Humidity, <85%;
7.3 Atmospheric positive pressure; G-~I0GkPa;
8 Power supply station
Yu.1 Power supply network: 187.-230V
8.2 Output voltage: 50±1112
Open without strong micro field-washing.
Attached certificate: No large mechanical vibration source
11 Move according to the specified setting
High quality wind vane thruster with an accuracy of more than 3 times: 11.1
Commercial belt scale with an accuracy of more than 3 times the corresponding weighing equipment: 1t.3
Stopwatch for one second,
12 The actual material can be selected according to the required particle size, the particle size is not more than 20mm 13 Appearance inspection
3 Inspection items and methods
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23 Inspection items and methods
24 Inspection items and methods www.bzxz.net
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2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods
2A Inspection items and methods | Determination of static performance
Add 25%, 50%, 75% to 100% rated load on the base frame in turn, record the flow display value of each test point (trace, three times on each side of the test), then the static performance of the whole system. Calculate according to formula (t): Dg-[2g Im × 100%
Station:
1, 2, 3.4 represent 25%, 50%, 75%, 1U0% rated flow points in turn: P: the theoretical value of the first test point. Its value is calculated according to formula (2): Dm =i×2
In the formula, is the arithmetic mean of the measured values of the fourth test point: The static performance should comply with the provisions of 6.3.1. 17 Verification of static repeatability
When adding a load of 25%, 50%, 75%, 10% of the rated flow, repeat the measurement for each test point once. Their static repeatability is calculated according to the formula (3): Da - Par × 10%
Where: "one point maximum display value:
[) - normal point minimum display value.
Static repeatability verification meets the requirements of 6.4.1 18 The machine is driven by the belt: the belt runs for 10m, and the network is adjusted to the dynamic zero point 19 Verification of dynamic sensitivity
The dynamic sensitivity is carried out under no-load conditions. 9.1 Zero the instrument, start the stopwatch, and obtain the accumulated value of the instrument 3 M19.2 Place a small weight on the weight rack, and the value is 0.4% of the rated flow load (P). Read the meter 3rm. The dynamic sensitivity should meet the requirements of 6.2.2 20. Verification of dynamic linearity
Under belt running state, the verification shall be carried out by the method of No. 16. Dynamic linearity shall comply with the provisions of 6.7.2. 21. Verification of dynamic repeatability
Under belt running state, the verification shall be carried out according to the method of No. 17. The dynamic repeatability shall comply with the provisions of 6.4.2. 22. Verification of hand-point stability
22.1 Zero-point stability
Under belt running until the whole number is reached, the number of wells and the base are compared for nearly 3 minutes, and the side and volume indication values are respectively 5 times. The difference between the confirmed display value and the small display value shall be 6.5.1. Regulations: 22.2. 3h qualitative test After the belt continues to run for 3h, without zeroing, repeat the test of 22.1. The result should meet the requirements of 6.5.2. 25. Verification of the actual material calibration accuracy Read the feeding control system and make the hourly flow rate check 30%, 60% and 90% of the rated flow rate respectively. All measuring points are effective. In case of special circumstances, according to the actual situation The flow is only three times, and the amount of material delivered at each measuring point shall not be less than the largest value below: 500 scale value:
.2% of the maximum flow 11 cumulative value:
actual material calibration accuracy (4) before this calculation: W.-We.Is×100%
where: W-the measured flow, the three cumulative display values of the value ... 25 For belt scales used, only the verifications in Articles 16, 17, 20, 21 and 23 shall be carried out. The verification result processing and verification cycle shall be as follows: 26 For belt scales that have passed the verification test, a verification certificate shall be issued; for unqualified belt scales, a verification result circular shall be issued, but they shall not be issued, sold or used. 27 The verification cycle of belt scales is half a year. Appendix: Verification record format. Permitted seat number. Verification period. Source of the static and static seat. Static weight production. (3 hours. Zero period. (3 hours. 2 hours. Zero point. Change of the actual time. This point period can be changed. Light and automatic. New certificate quantity. Micro-flow rate. t||H!！ Number
Xu Jing Aluminum Transformer
Theory
Power Supply
Abnormal Discharge
Sick Carbon Parts 3
Half Position
Follow the Theory System
R Collection mw-M
Net Parts
Sensitive Collection M, · M:
Multi-point Period (-1 meter) Run Accurate
Zero Change Ratio Period (hours) Point Temporary
Actual Material Calibration for Confirmation
Appendix 2
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