WATER METERS LABORATORY

"Hydro meter" is the instrument that is intended to measure, memorize and display the volume of water passing through its measuring mechanism, in measuring conditions (ISO 4064 part 1).

EYDAP in order to properly collect the metering data of water meters located in the Water Network, invested in control equipment of water meters that record water consumption in the city network, thus ensuring the integrity of transactions with its water customers, but also the protection of natural resources. In this direction, the only Hydrometer Laboratory in Greece operates for a number of years, which performs operation and calibration tests of water meters, cross sections DN 15 - DN 150.

EYDAP, during the period 1996-2000, procured and installed four (4) automatic cold water meter testers of horizontal placement, with total control capability in flows from 15 l/h to 500,000 l/h and in dimensions from DN 15 to DN 150.

Given the uniqueness in Greece of a properly equipped water meter control laboratory and to document the results of measurements provided to its consumers, in 2002 it installed a Quality Assurance System according to the international standard ISO/IEC 17025 and was accredited by two metrology bodies, the metrology body (DKD) and the Greek metrology body (ESYD).

In 2020, EYDAP launched the renewal and upgrade of the metering control equipment of water meters, in accordance with the new requirements of European standards, through the supply and installation of three new automatic cold water meter testing laboratories with horizontal placement, with a total control capability of 2 l/h up to 550,000 l/h and in dimensions from DN 15 to DN 150, which are traceable to the National Standards.

With the supply of the new metering equipment, the Water Meters & Materials Testing Service of the Water Supply Systems and Data Department of EYDAP, which is responsible for metrological controls, has the ability to control the following categories of network instruments & materials:

• Mechanical meters of all types and metrological categories, dimensions from DN 15 - DN 40 with thread at the ends
• Non-moving meters (Electronic water meters) of all types and metrological categories, dimensions from DN 15 - DN 40 with thread at the ends
• Mechanical meters of all types and metrological categories, dimensions from DN 50 - DN 150 with flanges at the ends
• Non-moving meters (Electronic water meters) of all types and metrological categories, dimensions from DN 50 - DN 150 with flanges at the ends
• Electromagnetic flow meters of all metrological categories, dimensions from DN 15 - DN 40 with thread at the ends
• Electromagnetic flow meters of all metrological categories, dimensions from DN 50 - DN 150 with flanges at the ends
• "Strainer" & "Y" type filters, dimensions from DN 50 - DN 150 with flanges at the ends
• Valves of dimensions from DN 50 - DN 300 with flanges at the ends

In the mentioned bodies the audits carried out by category are:

• Cash recording error detection test
• Cash recording error repeatability tests
• Test to find the starting point for recording cash
• High static pressure resistance test (up to 32 bar)

In addition to the controls of the metrological characteristics of the meters, the Hydrometers & Materials Testing Service is in charge of drafting technical specifications for the supply of meters and measuring equipment as well as the training of the Personnel. In addition, it participates in the Committees for the Evaluation and Acceptance of Cash and Metering Equipment and in research programs of new cash and metering technologies.

Today, the Water Meters & Materials Testing Service provides its services to companies in the private and public sector (laboratories, industries, municipal water supply companies, etc.), both in matters of testing and in matters related to its responsibilities.

The communication with the Water Meters & Materials Testing Service is carried out by filling in the form "Test Request"

The "PRICE LIST OF TESTS & CALIBRATIONS OF HYDROMETERS" refers to test characteristics that meet the requirements of European standards.

For services that are not mentioned in the price list, it is necessary to contact the Water Meters & Materials Testing Service:

• e-mail eydapwml@eydap.gr

• tel. +30 310 2144839