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WATERMASTER
ELECTROMAGNETIC FLOWMETER | DS/ WM-EN REV. Y
OIML / MID approved
WaterMaster has been type tested and Internationally
approved to the highest accuracy class 1 and 2 for cold and
hot potable water meters – OIML R49-1 (Organisation
Internationale de Métrologie Légale). For full details, OIML
R49 is available to download from www.oiml.org. Its
requirements are very similar to other International
standards, such as EN14154 and ISO4064.
WaterMaster has been assessed by type approval at the
National Measurement Office (NMO) to OIML R49 and passed
to the very highest accuracy designations for sizes DN40 to
DN200 (11/2 to 8 in. NB).
The approval is for:
• Class 1 and Class 2 accuracy (calibration option)
• Environmental class T50 for water temperatures of
0.1 to 50 °C (32.18 to 122 °F)
• Electromagnetic Environment E2 (10 V/m)
• Any pipe orientation
• 5 Diameters upstream pipe
• 0 Diameters downstream pipe
• Pressure Loss Class <0.25 bar (3.62 psi)
• Integral or remote transmitter (<200 m [<656 ft.] cable)
• DN40 to DN200 (11/2 to 8 in. NB), bi-directional flow
A major advance in WaterMaster is the self-checking
capabilities that meet and exceed the R49 requirements and
is the first electromagnetic flowmeter to be approved to
OIML Type P permanent self checking during normal
operation (not just at startup) and alarm indication for:
• transmitter and sensor status, with an accuracy alarm
• program ROM and RAM status
• double, independent storage of totalizer values, in both
the sensor and transmitter non-volatile memories
• display test
The OIML R49-1 certificate of conformity is available from:
http://www.abb.com/product/seitp330/
b42ec2377d3293cdc12573de003db93b.aspx
WaterMaster is also approved under the EU Measuring
Instruments Directive (MID) 2004/22/EC, that covers putting
into use water flowmeters for certain applications. MID
WaterMaster is secured against tamping and is available as an
option, along with fingerprinting for ABB VeriMaster in situ
verification product, with certificate printout to ±1 %
accuracy.
WaterMaster certificates of EC type-examination of a
measuring instrument are available from:
http://www.abb.com/product/seitp330/
b42ec2377d3293cdc12573de003db93b.aspx
Superior control through advanced sensor design
The innovative, patented octagonal sensor design improves
flow profile and reduces up- and down-stream piping
requirements for the most commonly used sizes of 40 to 200
mm (11/2 to 8 in.). This optimized full bore meter provides
impressive results in the most difficult of installation
requirements.
WaterMaster sensors are also available in reduced-bore
geometries giving the ultimate in low-flow performance with
a very high turn-down range.
The unique design of the reduced-bore sensor conditions the
flow profile in the measuring section so that distortions in
the flow profile, either upstream or downstream, are
flattened. The result is excellent in situ flowmeter
performance, even with very bad hydraulic installation
conditions.
