Seametrics WMX101 - Manual (Page 4)

Page 2
INSTALLATION AND ELECTRICAL CONNECTION
Caution: These flow sensors are not rec-
ommended for installation downstream of
a boiler feedwater pump where installation
fault may expose the flow sensor to boiler
pressure and temperature. Maximum recommended
temperature is 130˚ F.
Partially Open
Butterfly Valve
INSTALLATION ELECTRICAL CONNECTION
Caution: There are no connections inside
the display. Breaking the seal wire will
VOID WARRANTY.
Positioning the Meter. These are all-position meters,
meaning that they can be installed horizontally, vertically,
and in any radial position. If there is potentially a problem
with sludge accumulation, vertical or horizontal with the
register up may be preferred. See recommendations on
pages 3 and 4.
Piping Conditions. As with most flow meters, the WMX101
requires some straight pipe before and/or after the meter for
best accuracy. However, the tendency of electromagnetic
meters to average the flow across the entire pipe allows
for shorter straight pipe recommendations than most
mechanical meters. Follow the guidelines on page 3 for
the type of installation that best matches yours.
The WMX101 is designed with an empty pipe detection
feature that is activated when one or more of the electrodes
is exposed to air. Therefore, an installation in which the
pipe is nearly but not completely full will give an erroneous
reading of “empty pipe”. To avoid such reading errors,
be sure to configure piping to ensure that the pipe is full,
without air pockets or bubbles, when there is flow. See
diagrams on page 4 for installation recommendations.
flanges. The flanges on the WMX101 have standard ANSI
150 lb. drilling and will match up with any other ANSI 150
lb. flange.
Electrical Connections. A current source of some kind at
12 to 24 Vdc must be connected to the meter. If needed for
remote reading, logging or telemetry, the pulse output can
also be connected. See the Connections diagram on page
5 for guidance. It shows the color coding of the pre-installed
power/pulse output cable. If it is necessary to replace this
cable, for instance to install a longer one, see the drawings
for proper installation of the cable into the connector.
Electrical Noise Immunity. For best results, connect
grounds and cable shielding as shown in the diagram on
page 5, and install the included ferrite beads by snapping
them onto the outside of the cable.
AR
CH
IVE
D
(Includes Dates Before 2/15/07)