Microtel Series 1000 User Manual

Page 16

MICROTEL Series 1000 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 3.

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

1000 battery charger.

Figure 3. Battery Connection