MAInTEnAnCE, REPAIR and TROuBLE SHOOTInG
Problem
Probable Cause
Try...
Blank display:
WMP101
Blank display:
WMP104
Reading “-EP-”
Flow but no flow rate reading
No power to unit
Batteries dead or misinstalled
Empty or partly filled pipe
Excessive air pockets or foaming
Heavily coated electrodes
Check power supply
Check wiring
Check polarity, replace batteries
Rearrange piping to ensure full pipe
Remove meter and wipe electrodes
MAInTEnAnCE AnD REPAIR
There are no user-serviceable parts in the WMP-Series me-
ters except the batteries in the WMP104.
Battery Replacement.
When the “low bat” indicator ap-
pears, the batteries should be changed. Either six each
AA alkaline cells are required, or two each C lithium cells
with integrated wiring harness, depending on power option
ordered with meter. To change the batteries, first remove
the four screws which hold the top cover in place. Be care-
ful not to lose the washers. Move the top cover to one side
and remove the foam retainer which covers the battery tray
or pack.
> For units with AA alkaline batteries, remove the old bat-
teries from the battery tray, and replace them with fresh
ones, taking care to follow the polarity indicators in the
battery tray.
> For units with C lithium batteries, carefully unplug each
of the two battery wiring harness connectors. Slip the bat-
teries out from under the elastic retainer, and replace them
with the new batteries. Reconnect each of the two wiring
harness connectors. The connectors are indexed for cor-
rect installation.
Replace the foam retainer, then put the top cover back in
place. Warning! Use Extreme Caution not to trap wiring or
other assembly parts under the housing seal - this may
cause an ingress of water, voiding the product warranty.
Put the four screws with washers back and tighten them
firmly. Environmental and Safety note - take care to dis-
pose of all batteries in accordance with Federal, State, and
Local regulations.
TROuBLE SHOOTInG
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