Publication: Kajian ketepatan meter air mengikut jangka hayat meter
Date
2001-12-01
Authors
Oo, Wah Tong
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Abstract
Penang Water Supply Corporation Private Limited has taken a few measures to
improve its efficiency in the management of water supply. Several new departments
and sections have been set up to handle some problems in water supply management.
One of the newly formed sections, Water Lost Control Section under the Strategic
Planning Department, is to handle the problem of non-revenue water (NRW). Among
the strategies that have been taken to reduce the rate of NRW is the study regarding
the contribution of meters inaccuracies in the water supply system to NRW so that a
new policy and programme on meter change can be implemented to improve the
overall accuracies of meters in the water supply system. For this purpose, a
computerised meter testing programme has been carried out for meters recovered
from premises of consumers through daily disconnections of water supply. From the
meters tested, data concerning meter errors at several critical flow rates have been
collected for a period of eight months. With further analysis of the data, the most
economic meter change out period based on local water quality, consumption flow
rate and water tariff structure has been established. Among the results obtained after
thorough analysis of data collected are as follows:
Contribution of meter inaccuracy of 15 mm PSM meters to NRW is 2.3% for
Penang Island.
The most economic life span of 15 mm PSM meter is five years.
The conclusions that can be drawn from this study is that meter accuracy deteriorates
with service life and the percentage error of meter in recording flow is higher at low
flow rate compare with high flow rate.