Maintenance and Troubleshooting
AVTMTTR25 Rev C April 2008
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Battery Replacement
TTR25 test set is powered up from six AA-size replaceable alkaline batteries. A
battery holder (contained six batteries) is installed in a battery compartment on
the back side of the instrument housing. The compartment door is fixed to the
housing by two screws.
To replace the batteries proceed as follows:
1. Remove the battery compartment door.
2. Lift up a battery holder from the compartment. Unplug a battery strap.
3. Replace all six batteries by the new ones. Use AA-size replaceable alkaline
batteries only. Observe the proper polarity of the batteries. A negative battery
terminal (flat bottom portion of battery) should be placed against a battery
holder spring. The batteries should be installed in series. See a battery holder
for proper polarity and battery installation orientation.
4. Connect a battery strap back to the battery holder. Install the battery holder
into the compartment.
5. Replace the battery compartment door and secure it with screws.
6. Turn on TTR25. It should display the opening screen, then the battery level
screen. The battery level displayed depends on many factors including type of
battery installed, battery manufacturing date, battery storing conditions, etc. In
average, the new battery level displayed should be above 80 %.
NOTE: The TTR25 is delivered with high-capacity (3135 mAh)
"Titanium" batteries installed. The specified operating
time of 12 hours is based on using these high-capacity
batteries or equivalent.
