Table 48-4 TI Calculating Counter vs. TI Indicator

Table 48-2 TI Calculating Counter Controls

Table 50-1 TI Calculating Counter Controls

TB-1-4920-443-35 Flexible Engine Diagnostic/Test System A/E37T-33 (P/N 20090500-1 &-9) Manual
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49

TB 1-4920-443-35

(l) With the tachometer tester, set RPM selector to the remaining speeds listed below. At each

tachometer tester speed, verify that the TI calculating counter and TI indicator indicates within the

tolerance limits listed below. Record results.

Table 48-4 TI Calculating Counter vs. TI Indicator

Tachometer

TI Calculating

TI Indicator TI Indicator (%)

AEDATS

Tester Speed

Counter

Digital .3%

Analog .3%

.1 Hz

(%)

.3%

RPM3

40 (28 Hz)

39.9 40.1

60 (42 Hz)

59.9 60.1

80 (56 Hz)

79.9 80.1

100 (70 Hz)

99.9 100.1

NOTE

For AEDATS II Channel names, refer to AEDATS (H345-1) Technical Manual, Appendix C and

for AEDATS IV Channel names, refer to AEDATS (H355-7) Technical Manual. Chapter 6.

AEDATS Alignment RPM3 - See Calibration of Automatic Data Acquisition H345-1

(AEDATS II), or H355-7 (AEDATS IV) for FEDS Alignment requirements.

(m) Set the tachometer tester to 10%, the motor direction switch to STOP, and the power switch to

OFF.

49. T53/T55/T63/T64 Gas Generator (N1) Speed Indicator and T64 Gas Generator (Ng) Speed Indicator

a. Performance Check

(1) Connect the tachometer generator test set to pins A and B of engine harness at Tachometer (N1).

(2) Set the TI calculating counter controls (Channel 1) as follows:

Table 49-1 TI Calculating Counter Controls

CH1 DEC

CH1 C

14286

CH1 10 Period

CH1 Auto

depressed

CH1 x10

released

channel 1

depressed

SAMPLE RATE (FAST)

TEST