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MODEL 5700
3. Set the display reading to the desired alarm level with the ZERO potentiometer.
4. Turn the ALARM potentiometer clockwise until the alarm just activates.
5. Check the setting by turning the ZERO potentiometer CW and CCW to cause the
instrument to go into and out of alarm. Observe display to confirm alarm setting
level.
6. Return the display reading to 00 with the ZERO potentiometer (NOTE: Zero gas
should be used when performing this adjustment).
V. MAINTENANCE
A. BATTERIES
Check batteries each time instrument is turned on by noting that the green NORMAL
light is on and the amber LOW BATTERY light is off. If the amber light is on, the
batteries need replacing.
Batteries are contained in drawers on the right-hand side. To replace the batteries:
1. Pull the small slot in the drawer face toward the front of the instrument to unlatch
the drawer and pull the drawer out of the housing.
2. Pry battery out of drawer with fingers and replace with a fresh 9V alkaline
transistor type battery, providing for proper polarity by placing minus (-) terminal
uppermost in holder. Place bottom of fresh battery against spring and press into
place.
CAUTION: OBSERVE PROPER POLARITY WHEN INSERTING BATTERIES.
POLARITY IS MARKED ON THE INSIDE OF THE DRAWERS.
3. Push drawer back into housing until it latches in place. Drawers inserted
incorrectly will not latch.
4. Repeat above steps for the second battery. (It is possible to operate with only one
battery, but operating hours will be greatly reduced).
B. DETECTOR
If the zero or span adjustments cannot be made within the range of their respective
potentiometers, the detector needs to be replaced. To replace detector:
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