Microtel Series 1000EX - Manual (Page 19)

MICROTEL Series 1000EX Dialer
Step Two - Connect a Battery and Enable Charging Circuit of the dialer to
insure uninterrupted operation in case of an AC power failure. Refer to Figure 5.
1. Turn power to the dialer OFF.
2. Connect the battery wires to the BATTERY+ and BATTERY- terminals.
3. Turn power to the dialer ON. Test the battery backup circuit by removing the AC
power to the dialer (leave POWER switch ON). The dialer should remain ON, and
after a few seconds, the POWER/FAULT LED should indicate a power failure (ON
10%, OFF 90% duty cycle). Reapply AC power to prevent a power fault alarm call
out at this time.
4. Connect a DC voltmeter across the CHARGE and BATTERY- terminals.
5. Using a small jewelers screwdriver, adjust the potentiometer located beneath the
power connector until the voltage is between 13.5 - 13.8 Volts DC.
6. Connect a jumper between BATTERY+ and CHARGE of the power connector. This
step enables the charging circuit in the dialer.
NOTE: A power supply voltage greater than 12 VDC is required to operate the Series
1000EX battery charger.
Figure 4. Battery Connection
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