FB-1 (FULL FACE)
SENSOR INSTALLATION
GENERAL DESCRIPTION
The Model 2100 FB-1 sensor has a PVC plastic
housing. The sensor is back filled with an epoxy resin.
The sensor head has a 3/4 inch NPTmounting nipple to
secure the sensor to the mounting bracket and attaching a
conduit fitting for routing the sensor cable back to the
elecontric enclosure.
Metallic conduit must be used to
run the sensor cable back to the electronics.
The sensor
must be mounted level. An ‘L’ mounting bracket is
supplied with the sensor.
The sensor is supplied with 50, 100, 300 or 500 feet of
continuous cable, or additional cable (up to 1000 feet
total) may be spliced onto the cable from the sensor.
Only
Belden 9222 cable should be used.
A component change in the electronics may be required
if the sensor cable length is changed from that shipped by
the factory. The critical lengths of the cable for the
component change are 150 feet and 500 feet. The
following shows the component value for C11 according
to the sensor cable length (see Figure 2-7, page 2-11 for
location):
0 to 150 feet — C11 = 6800PF
151 to 500 feet — C11 = no component
501 to 1000 feet — C11 = 470 uH
3 - 1/8 "
4 "
INSTALLATION
The meter is normally programmed at the factory to a
specific application. The sensor must be installed to the
proper mounting dimensions to ensure the accuracy of the
flowmeter. Refer to the data sheet in the front of this
manual for these dimensions.
MOUNTING BRACKET
4 - 1/8 "
1/8 "
3/8 "
DIA.
1 -1/4 "
3 "
6 - 1/8 "
Mounting Hole
The dimension that is used when mounting the sensor is the
vertical calibrated (Vcal) mounting distance. This is the
distance from the surface of the fluid at no (zero) flow, to
the face (bottom) of the sensor. There are two regions that
make up the Vcal distance. These are the sensor
offset
and the customer selected
full scale headrise.
2-4