Introduction of service and process of water flowmeter inspection

INTRODUCTION OF SERVICES AND WATER FLOWMETER INSPECTION PROCESS

 1. WATER FLOWMETER OVERVIEW

  - Water flowmeter includes: mechanical cold water meter, cold water meter with electronic mechanism is an instrument used to measure consecutively, memorize and display the volume or volume of water passing through the measuring converter. under measuring conditions. To ensure proper functioning of the equipment, the water meter must be periodically checked.

- According to regulations, water meters belong to the list of equipment required to be tested issued by the General Department of Standards, Metrology and Quality and under the state management authority of the Ministry of Science and Technology.

2. WHY HAS TO INSPECTION OF DEVICES? 

• Ensure reliability, stable and accurate operation of measuring instruments.

• Timely detection of damage to prevent possible problems during the working process.

• Serving practically, accurately and effectively for production, business and scientific research activities of the industry, the basis of benefits for consumers as well as the reputation of the product.

• Comply and strictly comply with the provisions of the law.

3. TESTING CONDITIONS

When conducting the test, the following conditions must be met:

• Mechanical cold water meter, cold water meter with electronic structure must have decision on approval of measuring instrument model.

• The meter must be installed into the test system in accordance with the manufacturer's instructions.

• Gaskets must not encroach on the inside of the duct.

• The straight front and rear pipe segments of the meter shall have a length not less than the values ​​specified in the manufacturer's manual and shall have the same nominal diameter as the meter.

• Water used for meter testing must be free of impurities and may be obtained from an overhead storage tank, pumped from a pipeline or a source tank of the testing system.

• The meter is tested at ambient and water temperatures not exceeding 40ºC for cold water meters, untreated water and not exceeding the manufacturer's permissible temperature for hot water meters. The temperature of the water is measured directly at the inlet or outlet of the metered pipe segment.

• During the measurement, the pressure behind the meter is not less than the atmospheric pressure.

• The maximum pressure of the system must not exceed the maximum working pressure of the meter.

4. PREPARATION OF CHECKLIST

Before conducting the inspection, the inspection system must be operated to ensure that the technology system does not leak test liquid, and the water source is stable.

 5. SMALL INSPECTION PROCESS

When conducting water meter testing, the testing organization must comply with DLVN 17: 2017 including the following steps:

Step 1: External check:

• Visually observe and determine the meter's compliance with regulatory requirements. regulation: size, shape, indicator,

Step 2: Technical check:

• Check for tightness.

• Check digital stability only when the flow stops.

Step 3: Check measurement:

• Define traffic points.

• Determine relative error.

Step 4: Process the result:

• After the inspection, the watch achieves the sealing of the adjustment mechanism, the stamp and the certificate of inspection

• For watches that do not reach Dong Tam company, notify the results and remove stamps and seals on the clock (if any).

Note:

• This inspection procedure is applied to initial inspection, periodical inspection and post-repair inspection for mechanical cold water meters, cold water meters with electronic mechanism with accuracy class 1, 2 or A, B, C, D.

6. REASON FOR CHOOSE DONG TAM MEASUREMENT CO., LTD as an inspection unit

• Our company has been appointed by the General Department of Standards, Metrology and Quality to be allowed to inspect initially, periodically, and after repair all types of mechanical cold water meters and cold water meters with electromagnetic structure of diameter. from DN15mm to DN300mm.

• A team of technicians and inspectors are well-trained, highly qualified and experienced to promptly handle unusual incidents during the implementation process.

• Flexible inspection costs suitable for all types of customers.

7. CONTACTS

Customers/businesses wishing to inspect water meters and receive a quote for inspection services, please contact us via the information:

LABORATORY: DONG TAM MEASUREMENT AND TECHNICAL TRADING SERVICE CO., LTD

Address: 57-59 Street 11, Binh Hung Residential Area, Binh Hung, Binh Chanh, HCMC

Tel: 028 375 83 869 - Hotline: 0909 347 891 (Mr. Lam)

Email: info@dongtam-mes.vn