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1. OPERATING CONTROLS
A. The functions of the front panel switches and components are as follows (refer to Figure 5):
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1. The PWR (power) pushbutton, when pressed, applies power to the TT1200A and begins the
initialization process.
2. The BKLT (backlight) pushbutton, when pressed, provides a backlight to the LCD to
improve readability under dim lighting conditions. A second press of the key turns the
backlight off. (The backlight goes out automatically five minutes after activation to conserve
batteries, unless the "BKLT auto-off" feature is disabled by pressing the BKLT pushbutton
for 2 or more seconds.)
3. The TEMP ADJ control knob allows coarse adjustment of the temperature. When the
FUNCTION is in the IND Test position, the display shows millivolt readings.
4. The FINE control provides exact adjustment of the temperature or millivolt readings shown
on the display when the FUNCTION switch is in the IND TEST position.
5. The FUNCTION switch is a four-position rotary switch that allows selection of the four main
test functions:
a) RES MEAS (Resistance Measure)
b) INS MEAS (Insulation Measure)
c) IND TEST (Indicator Test)
56-101-00930 Revision H
CHAPTER 2: OPERATION
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Figure 5 TT1200A Front Panel & Switches
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