Yunnan's local calibration specification "Qualification of smart cold water meter verification" draft
November 17 00:00:49, 2024
[China Instrument Network Instrument Standards] On November 20, the Yunnan Provincial Bureau of Quality and Technical Supervision issued the draft of the local metrology technical specification “Verification Regulations for Intelligent Cold Water Meters†for consultation drafts, and it was requested by various measurement agencies, research institutes, and other relevant units. opinion.
(Image from the Internet, invaded)
The intelligent cold water meter is a cold water meter that consists of a base meter and additional electronic components. It has certain functions such as on-site digital display or remote digital display, prepayment, and multi-fees (ladder) billing.
This verification procedure is based on GB/T 778.1, “Drinkable Cold Water Meters and Hot Water Meters Part 1: Specifications for Measurement of Water Flow in Closed Full Ducts,†JJG 162 “Cold Water Metersâ€, CJ/T 224 “Electronic Remote Water Metersâ€. The relevant content, combined with the actual situation of Yunnan smart cold water meter manufacturing and application of the verification procedures.
The verification procedure belongs to the Yunnan Provincial Technical Supervision Bureau. Drafters include the Yunnan Institute of Metrology and Measurement Technology, Kunming Water Supply Equipment Manufacturing and Installation Co., Ltd.
The reference documents for the preparation of this verification procedure include GB/T 778.1, “Drinking Water Meters and Hot Water Meters for Drinking Water Measurements in Closed Full Pipes, Part 1: Specificationsâ€; CJ/T 133 “IC Card Cold Water Metersâ€; CJ/T. 224 Electronic Water Meter; JJG 162 Cold Water Meter; JJG 164 Liquid Flow Standard Equipment; JJG 1113 Water Meter Verification Equipment;
This verification procedure is applicable to the first verification, subsequent verification and in-service inspection of the intelligent cold water meter.
This verification procedure includes the introduction, scope, reference documents, terminology and unit of measure, overview, measurement performance requirements, general technical requirements, measurement instrument control, and appendices in the organizational structure. (For more details, please see the attachment).
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316 Stainless Steel Shot
Chemical Composition (%)
C
Si
Mn
P
S
Ni
Cr
N
Mo
Cu
0.066
0.39
1.10
0.035
0.002
10.06
16.36
0.049
2.06
0.62
Size: 0.25mm-3.0mm Other size could also be customized.
Shape: ac cut, G1, G2, G3 and G4.
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