Revision A
T-48 90 008 026
2-5
SECTION C
OPERATING INSTRUCTIONS
2.7 General
Operation of the Test Set is easily accomplished by pressing the
TEST
or the
INTERROGATE
switches.
By pressing the
TEST
switch, the operator will access the Manual sequence of tests, which allows single
step initialization of each test and the results. By pressing the
INTERROGATE
switch, the Test Set will
automatically perform all tests in sequence and display the results only if a failure is discovered.
2.8 Battery
Operation
The T-48 is equipped with a rechargeable Ni-Cad battery capable of operating the Test Set using a 50%
duty cycle for 8 hours at 77 degrees F (25 Degrees C). This represents a full day of typical testing on a
single charge. When operating the Test Set in lower temperatures, the battery life will decrease slightly.
Due to the Ni-Cad batteries ability to maintain a constant current level, the operator will be able to utilize
the Test Set until the batteries are nearly depleted. The unit may then be plugged into a standard 120 (220 if
configured) VAC power source to continue testing. By observing a duty cycle of 50%, the Test Set
batteries will begin regaining their charge while testing is in progress.
It is strongly recommended that the batteries are charged for a short time each week regardless if the Test
Set has been utilized or not. A completely discharged battery will require approximately 16 hours to fully
charge. Occasional charges of 16 hours on partially depleted batteries will have no adverse effects.
To charge the batteries, utilize the following procedures:
1. Remove the power cord from the inside cover and attach it to the
AC POWER
receptacle.
2. Connect the power cord to a suitable 120 or 220 (if configured) VAC outlet. For 220 VAC
operations, see paragraph 2.8.1.
3. Press the
AC POWER
switch to the “ON” position.
4. Verify the green LED
AC POWER
indicator is lit signifying that the battery has commenced
charging.
2.8.1
220 Volt Operation
The Test Set is equipped from the factory for 120 VAC. To operate the Test Set using 220 VAC,
follow the procedures as listed below.
1.
Remove
the
FUSE CARTRIDGE
from the Test Set by releasing the Tab and pulling straight
the cartridge straight out.
WARNING
Failure to properly configure the Test Set for 220 VAC operations before use may result
in severe damage to the Test Set.
