Chapter 2 Installation
FastFlo™ 620S Instruction Manual
2-8
IM-62S
Remote Sensor Probe Wiring
Use only factory supplied cables when connecting the sensor probe to
a remotely mounted flow meter enclosure. The electronics, sensors
and interconnecting cables supplied by Sierra Instruments are calibrat-
ed as a complete precision mass flow circuit.
To connect the sensor probe to a remotely mounted electronics enclo-
sure, see Figure 2-9. To make wiring connections from a sensor probe
junction box to a remotely mounted enclosure, see Figure 2-10.
Figure 2-9. Remote Electronics Enclosure to Sensor Connections
Figure 2-10. Sensor Junction Box to Remote Enclosure Connections
Velocity
sensor
RED
GREEN
ORANGE
WHITE
BLACK
Temperature
sensor
Remote
enclosure
Sensor
probe
5
6
1
2
RED
GREEN
ORANGE
WHITE
BLACK
Remote
enclosure
Sensor
probe
junction
box
1
2
5
6
Caution!
Changing the length of
cables or interchanging
sensors or sensor wiring
will affect the accuracy of
the flow meter. You can-
not add or subtract wire
length without returning
the meter to the factory
for re-calibration.
