General Operating Instructions - barfield TT1200A User Instruction Manual

*Note: The soft keys referred to in item numbers 12-16 of Figure 4 may also be used as
numeric keys when entering a password.
17. Two battery holders contain six (6) C-cell alkaline batteries that provide the power for all test
set functions.
18. Standard Leads P/N 175-00215 for Test Set P/N 101-00930 or P/N 175-00217 for Test Set
P/N 101-00930-OH58D.

2. GENERAL OPERATING INSTRUCTIONS

Consult the temperature indicator system and/or engine manufacturer's instructions for procedures
and specifications.
Note: It is recommended that the complete TT1200A Operation procedures be read
before attempting to use the Test Set.
A. Protective Circuits
Although the TT1200A has input protection, do not connect the test set to an energized circuit.
B. Battery Installation and Verification
1. Remove the covers from the battery holders located on the right side of the case. Lift the left
side of the TT1200A so that the batteries slide out. Insert three (3) alkaline C-cell batteries
into each holder with all positive terminals facing outward. Reattach the covers to each tube.
2. At power-up the display shows the message "Battery ###%", to indicate the remaining
available battery life.
3. The user may check battery condition at any time by pressing the MENU pushbutton.
4. When the available battery power goes below 15%, the Test Set displays the "Battery Low"
message approximately every minute. When the available battery power goes below 7%,
the T/S displays the "Battery Low" message every 30 seconds. In this case, replace the
batteries as was described above.
C. Precautions
1. Do NOT press the PTM or PTS pushbuttons with test clips connected to the aircraft
indicator. The applied current may damage the indicator.
2. Do NOT connect test clips to an energized circuit. Although the TT1200A is provided with
protective devices, not all damaging potentials may be completely safe.
3. Allow sufficient time for test clips to stabilize to the temperature of the terminals to which
they are connected for temperature tests.
4. For greatest accuracy, measure system and thermocouple resistance with a cold engine.
5. To conserve battery power, power down the Test Set when it is not in use.
6. The Test Set displays the message "Battery Low" indicating that the batteries should be
replaced.
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