TROUBLESHOOTING
ST100 Series Flow Meter
40
Fluid Components International LLC
The table values are temperature dependent and may differ several ohms higher or lower depending on the local temperature. The resistance
values shown above are based on an ambient temperature of 70 °F (20 °C). If these resistance values are correct, the integral flow element is
confirmed correct. If the resistance values are not correct there is a problem with the flow element.
6. Reassemble the flow element plug into the connector TB1 making sure the tab on the plug is in alignment with the tab on the connector.
7. Carefully slide the electronics assembly back into place, inside the enclosure, and secure with the two M4 socket head screws.
Remote Configuration (Reference Figure 19 shown below.)
1. Turn off the input power to the instrument.
2. Disconnect the flow element wires from local terminal block.
3. Using an ohmmeter, measure and record the ohm values between the pins identified in the Remote Flow Element Resistance Table.
4. Reassemble the flow element wires back onto the local terminal block as shown in the figure below.
LOCAL FLOW ELEMENT WIRING
PIN
1
2
3
4
5
6
7
8
WIRING
LABEL
1 GND
2 GND SEN
3 REF SEN
4 ACT SEN
5 REF EXC
6 ACT EXC
7 HTR #1
8 HTR RTN
C01235-1-1
Probe A
Probe B
Approximate Resistance
1 GND
2 GND SEN
0 ohms
2 GND SEN
3 REF SEN
1080 ohms
2 GND SEN
5 REF EXC
1080 ohms
2 GND SEN
4 ACT SEN
1080ohms
2 GND SEN
6 ACT EXC
1080 ohms
3 REF SEN
4 ACT SEN
2160 ohms
3 REF SEN
5 REF EXC
0 ohms
4 ACT SEN
6 ACT EXC
0 ohms
8 HTR RTN
7 HTR EXC
110 -118 ohms
Remote Flow Element Resistance Table
Figure 19
