56-101-00901-D Page 2 of 19
(7) Carrying Case features;
(a)Fabricated from drawn aluminum for maximum strength.
(b)The lid has been fitted with a bracket which, when the lid is closed,
contacts the "ON/OFF" switch, in the "ON" position and moves it to the
"OFF" position.
(c)Provides, on the right hand side, space for test lead storage.
(d)The lid also contains a placard presenting abridged operating instructions
for the experienced technician.
NOTE
:For personnel without experience, it is advisable to become familiar
with this publication, the TT-1000A, and the equipment with
which it is to be used BEFORE performing any test or checks.
3. SWITCHING FUNCTIONS (Refer to Figure. 1)
A. The "ON/OFF" switch (1) applies power for all functions.
B. The "TEMP. ADJ." control knob (3), a ten turn potentiometer permits exact
adjustment of the millivoltage generator for temperatures which are displayed on
the LCD (2) as oC when the "FUNCTION" switch (4) is in the "INDICATOR TEST"
position.
C. The "FUNCTION" switch, a three position rotary switch that permits selection of the
three principal test functions, "RESISTANCE MEASURE", "INDICATOR TEST"
and "TEMP. MEASURE".
D. The "PUSH TO MEASURE ACFT. LEAD RES." BLACK pushbutton (5), when
depressed with test leads connected to aircraft system and "FUNCTION" switch in
"RESISTANCE MEASURE" position produces a display of the resistance in the
system.
E. The "SHORT TEST LEADS AND PUSH TO SET SYSTEM RES." RED pushbutton
(6), when depressed with test leads shorted and the "FUNCTION" switch in the
"RESISTANCE MEASURE" position connects the "SYSTEM RES." potentiometer
for system resistance adjustment.
F. The "RESISTANCE RANGE" switch (7), a four position rotary switch, permits
selection of the resistance range, 20 Ω, 200 Ωor 2 MΩ- (0 Ωsystem resistance)
and "BAT" position for monitoring the 45-volt battery.
