TM 11-6625-2440-12
CHAPTER 3
OPERATING INSTRUCTIONS
Section I. OPERATOR'S CONTROLS AND INDICATORS
indicators, and connectors with their reference
3-1. Damage From Improper Settings
designations and functional descriptions.
Unless
otherwise specified, functional descriptions relate to
No combination of control settings will cause damage to
operations within the test set. Control-display unit is
equipment or create a hazard to personnel.
abbreviated C-D unit in the chart.
3-2. Operating Controls and Indicators
a.
Control-Display Unit; Controls, Indicators, and
Control, indicator, or connector
Ref des
Function
28 VDC connector J2 --------------------------
1A1FL2
Provides input connection for 28 vdc test set operating power.
28 VDC PRIMARY circuit breaker----------
1A1CB2
Controls application of and provides overload protection for test set 28
vdc primary power.
28 VDC switch-----------------------------------
1A1S2
Controls application of primary 28 vdc and operating voltages to test set.
28 VDC indicator -------------------------------
1A1DS2
Indicates 28 vdc power is applied to test set.
115 VAC indicator ------------------------------
1A1DS1
Monitors C-D unit power supply +15 vdc output when 115 vac and 28
vdc power are applied to power supply.
115 VAC switch ---------------------------------
1A1S1
Controls application of 115 vac primary power to test set.
115 VAC PRIMARY circuit breaker --------
1CB1
Controls application of and provides overload protection for test set 115
vac primary power.
115 VAC 400 Hz 3PH connector J1 -------
1A1FL1
Provides input connection for 115 vac 400 Hz, 3-phase test set
operating power.
MODE switch ------------------------------------
1A1S3
OFF: Functions to inhibit platform power circuits and clear the test set
align mode control logic.
------------------------------------------------------
STBY: Functions to provide power to platform heaters, magnetic
heading servo, and part of transformer-buffer assembly and to clear
the test align mode control logic.
------------------------------------------------------
ALIGN: Provides the functions listed for STBY position and enables test
set and platform mode control logic to sequence through the align
mode. The phases of the align mode are cage (32 seconds), level
(2minutes), gyrocompass 1 (4 minutes), and gyrocompass 2 (no time
limit).
------------------------------------------------------
NAV: Inhibits platform AV inputs to test set velocity torque logic and
switches only earth rate correction signals to platform. Also latches
platform coarse heaters off.
------------------------------------------------------
AIR DATA: Functions to deenergize platform power supply and heaters
and to maintain operational status of platform magnetic heading
servo and part of transformer-buffer assembly.
CAGE switch-------------------------------------
1A1S11
HOLD: Provides switching to place and hold the test set and platform
mode control logic in the cage phase of align mode for 32 seconds
and until switched to OFF.
------------------------------------------------------
OFF: Permits test set and platform mode control logic to sequence
through cage phase of align mode.
CAGE indicator----------------------------------
1A1DS13
Lights when test set and platform mode control logic is in cage phase of
align mode.
LEVEL switch ------------------------------------
1A1S5
HOLD: Provides switching to place and hold the test set and platform
mode control logic in the level phase of align mode for 2 minutes and
until switched to OFF.
------------------------------------------------------
OFF: Permits test set and platform mode control logic to sequence
through level phase of align mode.
3-1
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