USING THE RPS-1in the OM-420
Omega Engineering Inc.
7
Stamford, CT
BATTERY REPLACEMENT
NOTE: USE CAUTION IN WORKING WITH THE GEL-CELL BATTERIES TO PREVENT SHORTING OF
THE TERMINALS OR WIRING AT ALL TIMES!
Under reasonable operating conditions and temperatures, the two gel-cell batteries should provide several
hundred charge/discharge cycles. When the batteries will not charge completely and/or they discharge
rapidly, they will need to be replaced. To remove the batteries, follow these steps
1. TURN THE MAIN POWER SWITCH OFF
2. Unscrew the four thumbscrews from the battery pack cover (On the inside of the enclosure
door).
3. Disconnect the two plastic wiring connectors.
4. Remove the old batteries and insert the new ones.
5. Reconnect the two plastic wiring connectors, Ensure that all wires match colors.
6. Tuck the connectors between the batteries and the edge of the enclosure door
7. Replace cover & install thumbscrews
8.
CAUTION: CHECK THESE CONNECTIONS BEFORE TURNING THE MAIN POWER SWITCH ON,
INCORRECT CONNECTION WILL RESULT IN PERMANENT DAMAGE TO THE RPS-1.
TROUBLESHOOTING
SYMPTOM: OUTPUT VOLTAGE IS LOW
PROBLEM:
Batteries are discharged
SOLUTION:
Recharge the batteries
PROBLEM:
Power Supply is in current limiting mode
SOLUTION:
Decrease the load current draw by reducing supply voltage (if compatible with sensor
requirements), switching some of the load to the other Power Supply.
PROBLEM:
More than one OUTPUT VOLTAGE PROGRAMMING SWITCH is ON.
SOLUTION:
Review the OUTPUT VOLTAGE setting table and correct the switch settings.
PROBLEM:
Desired power supply output voltage is 12 VDC or greater and the MAIN POWER
SWITCH is set to 12 VDC.
SOLUTION:
Switch the MAIN POWER SWITCH to 24 VDC.
SYMPTOM: OUTPUT VOLTAGE IS CORRECT BUT VOLTAGE AT SENSOR IS LOW
PROBLEM:
Excessive voltage drop in sensor wiring
SOLUTION:
Check for bad connections in wiring loop
SOLUTION:
Use larger gage wire (18 AWG should be sufficient for most applications)
SYMPTOM: STATE-OF-CHARGE INDICATOR DOES NOT LIGHT
PROBLEM:
The MAIN POWER SWITCH is OFF
SOLUTION:
Switch to 12VDC or 24VDC position
