Rev E TR-220 90 008 088-1
2-5
SECTION C
OPERATING INSTRUCTIONS
2.7 General
The TR-220 is a self-contained instrument comprised of a Test Set mounted in a rugged case
with a removable cover. The Test Set front panel contains all the switches necessary to test
Transponders (ATCRBS and MODE S), ADS-B and TIS, DME and TCAS equipment. By the use
of toggle switches and an easy to read display, the operator may quickly test, make accurate
measurements and perform preprogrammed or manually selected TCAS scenarios. The
directional antenna with an active LED display and optical sight are utilized for Transponder,
DME, and TCAS tests. All accessories are stored in the Test Set case for easy storage and
protection.
2.8 Battery Operation
The TR-220 Test Set is equipped with a rechargeable Lead Acid battery, capable of operating the
Test Set using a 20% 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.
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 115 or 220 VAC / 47 to 440 HZ power source to continue
testing. By observing a Duty Cycle (DC) of 20%, the Test Set batteries will begin regaining their
charge while testing is in progress.
The TR-220 provides a low battery warning system to alert the operator when battery strength
has been depleted to a point where testing may be interrupted. Several warning are displayed to
warn the operator of this condition and to give them a warning that the batteries will require
charging or supplemental AC power applied to complete extended testing.
As the battery capacity decreases, the Test Set will display the following:
Toggle the AUTO switch to bypass the display and continue testing. Approximately 15 minutes of
battery capacity is available. As the battery strength decreases, the display will indicate:
This indicates only several minutes of testing time is available. It is recommended that AC power
be supplied to continue testing or testing halted at this point and the Test Set charged. Toggle the
AUTO switch to bypass this warning. Further testing will result in the final warning:
Low Battery
Press AUTO to cont.
Low Battery
Recharge Required!
Low Battery
SHUTTING DOWN
To Next Page
Loading...
