TB 1-4920-443-35
(k) Verify that the calculating counter and TI indicator indicate between 104.2% and 104.8%. Adjust
the TI indicator high (Span) potentiometer as necessary (R23 for digital and R29 for analog high
adjustments). For T700-GE-401 and T700-GE-401C applications, the indications should be
99.7% to 100.3%.
NOTE
Interaction may occur between TI indicator low and TI indicator high adjustments.
Repeat the previous five steps until no further adjustment is necessary.
(l) Set oscillator to the speeds listed below. At each speed, verify that the TI calculating counter and
TI indicator indicates within the tolerance limits listed below. Record results.
Table 47-4 TI Calculating Counter vs. TI Indicator
T700-GE-700/-701/-
T700-GE-401/-401C
TI Calculating
TI Indicator
TI Indicator
AEDATS
701C Oscillator (Hz)
Oscillator (Hz)
Counter (%)
(%)
(%) Analog
(%)
0.3%
0.3%
Digital
5%
RPM4 1
0.3%
%
533
800
1066
1333
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 RPM4 - See Calibration of Automatic Data Acquisition H345-1
(AEDATS II), or H355-7 (AEDATS IV) for FEDS Alignment requirements.
(2) Power Turbine (NG) Speed Indicator
(a) Connect the oscillator test set to pins 20 and 21 of connector E3.
(b) Set the TI calculating counter controls (Channel 1) as follows:
Table 47-5 TI Calculating Counter Controls
CH1 DEC
4
CH1 C
04682
N
CH110 Periods
0
CH1 Auto
depressed
CH1 x10
released
Channel 1
depressed
SAMPLE RATE (FAST)
1
TEST button
depressed
POWER button
depressed
Table 47-6 Oscillator Settings
Level
500 mV
Set Hz
214
Power
On
AEDATS Alignment NG - See Calibration of Automatic Data Acquisition H345-1 (AEDATS II), or
H355-7 (AEDATS IV) for FEDS Alignment requirements.
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