Chapter 3. OPERATING INSTRUCTIONS - TM-55-4920-411-13-P0012

TM 55-4920-411-13&P

CHAPTER 3

OPERATING INSTRUCTIONS

Section I. CONTROLS AND INSTRUMENTS

3-1. Operator's Controls.

All operator's controls, indicators, and connectors

are shown in Figure 3-1 and described in Table 3-1.

Table 31. Indicator and Control Functions

Indicator, Control or Connector

Function

Connects frequency and temperature outputs through test

SIGNAL OUTPUT APU (J2) connector

cable to start sequence control. Also connects switch inputs

to test set.

Power input connector connects to power cable.

115 VAC, 50 400 HZ POWER (J1)

Manually-actuated sequence timer displays intervals over

SECONDS display

range 0-99 seconds.

Starts, stops, and resets SECONDS timer.

START/STOP RESET switch

Monitor APU switch closures. Lamps L1 through L6 monitor

Lamps L1 L6

exciter and start fuel valve, main fuel valve, max fuel valve,

bypass valve, high oil temp, and low oil pressure,

respectively.

Adjusts frequency output, selected by FUNCTION SWITCH,

VAR FREQ ADJ (F1)

in 1% rpm units over range 5% rpm. See Note in

Selects 0, 5, 15, 70, 90 or 110% rpm frequency output when

FUNCTION SWITCH (S2)

VAR FREQ ADJ is in zero position

Tests lamps L1 L6.

LAMP TEST switch (S4)

Simulates low oil pressure, high oil temperature, and normal

LOP/HI OIL TEMP/NORM switch (S3)

operating conditions.

Adjusts simulated chromel-alumel signal output.

TEMP OUTPUT, 400 -- 800C (R1)

Controls application of power to signal unit.

POWER switch (S1)

Indicates when power is applied to (on) or removed from (off

Power indicating lamp (DS1)

test set.

3-1