Rev E TR-220 90 008 088-1
2-12
2.10 Initial Startup and Self-Test
When using the Test Set, it is advisable to have a fully charged battery. This will ensure all tests
can be completed with no interruptions or loss of data.
1. Turn on the TR-220 by toggling the ON/OFF switch “UP”. The green LED located
above the switch will illuminate. Briefly, the Test Set display will indicate: Model number,
current software version installed and total hours of operation.
2. The Test Set will immediately commence a SELF TEST.
The Self Test function is automatic, and will test the following components:
a. Digital Board
b. RF Maximum Power
c. RF Minimum Power
d. RF Board
If a failure is detected, a message indicating the failed component or test will be
displayed. If no failures are detected, the result will be briefly displayed before moving to
the initial start page of the selected tests.
3. Toggle the BACKLIGHT switch to the MOM position and verify the Test Set display
backlighting illuminates. Release the switch and the backlighting will extinguish.
4. Turn the Test Set “OFF” by toggling the ON/OFF switch down. The display will be blank
and the green LED will extinguish.
Tel-Instrument TR-220
REV X.XX 00001 hrs
Self Test
Testing . . .
Self Test
PASS
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