Fluid Components International RF83 Manual Troubleshooting - Manual (Page 3)

Doc. No. 003147 Rev. B 5 - 3 Model RF83 Flow Switch
CHAPTER 5 - TROUBLESHOOTING FLUID COMPONENTS INTL
Table 5-2. Remote Flow Element Resistances in Ohms
(flow element enclosure when separate from the control circuit enclosure)
From Terminal (Pin) To Terminal (Pin) Expected Ohms*
At Local Enclosure For Remote Option (3) At Local Enclosure For Remote Option (4) 5000
At Local Enclosure For Remote Option (3) At Local Enclosure For Remote Option (5) 10000
At Local Enclosure For Remote Option (5) At Local Enclosure For Remote Option (4) 5000
At Local Enclosure For Remote Option (1) At Local Enclosure For Remote Option (2) 215
*Resistance varies with temperature. These values should be ±5 ohms at 70 ° F (21 ° C).
Verification of Flow Element Voltage
If the above resistance checks are good, plug in the control circuit and apply power. Measure the voltages in
Tables 5-3 and 5-4. If the voltages are not correct, then remove and replace the control circuit.
Table 5-3. Local Flow Element Voltages
(control circuit enclosure)
From Terminal Pin To Terminal Pin Voltage Expected**
9 (+) 7 (-) 22VDC
7 (+) 8 (-) 12VDC
9 (+) 8 (-) 10VDC
10 (+) 7 (-) 22VDC (2 Watt Heater) 15VDC (1 Watt Heater)
19VDC (1.5 Watt Heater) 11VDC (0.5 Watt Heater)
Table 5-4. Remote Flow Element Voltages
(flow element enclosure when separate from the control circuit enclosure)
From Terminal Pin To Terminal Pin Voltage Expected**
At Local Enclosure
For Remote Option
3 (+)
At Local Enclosure For
Remote Option
5 (-)
22VDC
At Local Enclosure
For Remote Option
5 (+)
At Local Enclosure For
Remote Option
4 (-)
12VDC
At Local Enclosure
For Remote Option
3 (+)
At Local Enclosure For
Remote Option
4 (-)
10VDC
Heater Option
1 (+)
Heater Option
2 (-)
22VDC (2 Watt Heater) 15VDC (1 Watt Heater)
19VDC (1.5 Watt Heater) 11VDC (0.5 Watt Heater)
**Voltages are dependent on temperature.