IFR FM/AM-1200A Operation Manual page 27

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CAPTIVE
SCREWS
EXTERNAL REFERENCE CONNECTOR
POWER INPUT CONNECTOR
AC POWER INPUT CONNECTOR
S-232 CONNECTOR
!CD
Figure 2-2 FM/AM-1200S/A Rear Panel
CAPTIVE
SCREWS
INTERNAL Battery Operation:
1.
2-4
05
Place PWR/OFF/BATT Switch to "BATT'' position. IThis is a
Spring-Loaded ON/OFF Switch.) When operating the test set on
battery, an internal timer will interrupt power after
approximately 10 minutes. Depress PWR/OFF/BATT Switch to ''BATT''
position to restore power to test set.
The internal battery is charged whenever the test set
is connected to external AC or DC power, regardless of
whether the PWR/OFF/BATT Switch is in either the "ON''
or "OFF'' position. Typical recharge time is 12 hours
for a full charge. Minimum external DC input required
for full chage is 15 VDC.