Setting Battery Charger Output Voltage - Simplex 4020 Operating Manual

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9.1 SETTING BATTERY CHARGER OUTPUT VOLTAGE:

To set the battery charger output voltage to the correct level and set the thresholds for
battery charger high and low fault conditions, use the following procedure:(Figure 1.4
shows the location of adjustment points).
STEP 1 Ensure the batteries are disconnected.
STEP 2 Adjust potentiometer RV2 to set the voltage across the battery charger
terminals to 27.6V DC
STEP 3 Locate potentiometer RV1 on the main PCB and press the CPU RESET
switch located on the main PCB to clear the current BATtery fault
condition due to battery removal.
STEP 4 Turn RV1 anti-clockwise until a BATtery HI condition is indicated on the
display. If the battery fault condition is brought up before completing this
step, press the CPU RESET switch and continue the adjustment.
STEP 5 Press the CPU RESET switch .Then adjusting RV1 clockwise ,count the
number of turns until a BATtery LO condition is indicated on the display.
NOTE:
STEP 6 Then turn RV1 anti-clockwise by half the number of turns obtained in step
5. The display should now indicate BATtery OK condition.
NOTE:
STEP 7 Re-connect the batteries and press the CPU RESET switch to reset the
system.
When removing power from the panel, disconnect batteries FIRST
and AC power last. When connecting power to the system, connect
AC power FIRST and batteries last.
Document No: 4020-M010
If the battery fault condition is brought up before completing
this step, press the CPU RESET switch and continue the
adjustment.
If the battery fault condition is brought up before completing
this step, press the CPU RESET switch and continue the
adjustment.
CAUTION - POWERING REQUIREMENT
1st February, 1997 Issue 2.0