Getting Familiar With The EGM-4
EGM-4 Operator's Manual – Version 4.19
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A. Set the slide switch on the rear panel of the EGM-4 to the 'BATTERY'
position.
B. Switch the instrument on using the 'POWER' toggle switch.
Note, the internal battery CANNOT be used to power the EGM-4 while it is being
charged, but the external power supply can be used simultaneously instead.
2. Using the external power supply
A. Set the slide switch on the rear panel of the EGM-4 to the 'CHARGE' position.
B. Plug the EGM-4 External Power Supply into the '-ve/+ve' socket.
C. Switch the instrument on using the 'POWER' toggle switch.
CHARGING THE INTERNAL 12V NiMH BATTERY
1. Set the slide switch on the rear panel of the EGM-4 to the 'CHARGE' position.
2. Plug the EGM-4 NiMH Battery Charger into the 'CHARGE SKT'. To do this, line up
the three socket pins with the plug, and screw on the plug sleeve (do not overtighten).
Charge Cycle and LED Indications for 12V NiMH Battery Charger
LED
Mode
Orange
Battery not connected
Orange
Battery initialization & analysis
Red
Fast charge
Green with intermittent orange flash
Top-off charge
Green
Trickle charge
Alternating red-green
Error
Check to make sure that the “charge indicator light" (red LED) on the charger is a steady state
red after connection. If the LED does not come on, or it fluctuates, then there may be a bad
connection.
WARNING
THE EGM-4 IS FITTED WITH A SLIDE SWITCH (CHARGE
BATTERY).
DO NOT
OPERATE THE SLIDE SWITCH WHEN THE EGM-4 IS
CONNECTED TO ANY EXTERNAL POWER SUPPLY OR BATTERY
CHARGER.
Charge Socket
The charge socket is labelled “12V DC” on the rear panel of the EGM-4. The AC
Adapter/charger supplied by PP Systems plugs into this socket to charge the internal 12V 2.0
Ah lead acid battery.
Power Supply/Charger
All systems are supplied complete with an AC Adapter/Charger designed specifically for use
with the EGM-4 for charging the internal 12 V 2.0 Ah lead acid battery and for continuous
operation in the lab. This unit has the following technical specification:
Input
100-240 V ~ 50-60 Hz