WMP-SERIES INSTRUCTIONS
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CONNECTIONS and OPERATION
Black: Pin 4 = (–) Power
Blue: Pin 3 = (+) Pulse
White: Pin 2 = (–) Pulse
Brown: Pin 1 = (+) Power
Gray: Pin 5 = Ground
Shield Drain Wire
Cable Connections
Electrical Connections
WMP104.
The WMP104 is battery-powered, totally self-
contained, and does not require any electrical connections
(there is no output on the WMP104 model).
Operation
Grounding (WMP101).
For best performance, especially
in chemically noisy environments, the gray ground wire
and the bare drain wire should be connected together and
to a good earth ground as close to the meter as possible.
Metal pipe and fittings in contact with the fluid should
also be bonded to the same earth ground with corrosion-
resistant connections.
Display.
The display reads flow rate and accumulated total,
in the units for which it was ordered. The top line is the
total, the bottom line is the rate, and indicators give the
units (ac-ft, GPM for instance.) Empty or partially full pipe
is automatically detected and is indicated by a reading of
“ – EP – “.
Battery.
The standard batteries are user replaceable
with an approximate 1–2 year life depending on usage.
An extended battery life option offers an estimated 2–4
year life depending on usage. On the battery-powered
WMP104 there is a low-battery indicator (“low bat”) when
the battery voltage drops below a certain point. Batteries
should be changed within four weeks of the appearance of
this indicator.
WMP101.
A connector is provided on the outside of the
WMP101. To connect to the meter, plug the cable in and
hand tighten the retaining threads. Follow the diagram
to make connections. If you are using the pulse output,
connect power first and determine that the meter is
working properly by observing the display. Then connect
the pulse output.
Grounding
