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R.H. level gage (*) { { { { R21 = 1200 Q —> Set by P2 to 40°C
R25 = 80 Q —> Set by Pi to 118°C
R22 = 190 Q —> Set by P4 to 1.7 bar
R26 50 Q Set by P3 to 6.9 bar
R23 = 190 Q —> Set by P8 to 0
R27 = 5 Q —> Set by P7 to 1 / 1
R24 = 190 Q Set by P10 to 0
R28 = 5 Q --> Set by P9 to 1 / 1
(*) Check that the pointer reaches 110 Q (± 5 Q) when indicating 1 / 2
Voltmeter :
- Vary the supply voltage between 12 volts and 15.4 volts.
- Select 15.5 volts and set by P11 the pointer on the upper limit of the green and red sectors. NOTE : General tolerance of used resistors will be 1 %.
During settings, adjust potentiometers to obtain a correct indication at both ends of the scale (except for the voltmeter).
After settings, safety potentiometers with a light coat of varnish (TB 07-901).
For settings other than those of the voltmeter, the nominal voltage to be used is + 14.2 VDC.
AGAG
Validity : S / N 1 - 524, Pre-Kit OPT10 911400 (MOD. 46) 31-10 Page 503
03 (DA) SEP 02
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Validity : S / N 1 - 524, Pre-Kit OPT10 911400 (MOD. 46) 31-10 Page 504
03 (DA) SEP 02
ENGINE MONITORING CLUSTER
ADJUSTMENT/TEST
1. ADJUSTMENT OF OIL PRESSURE INDICATOR (Figures 501 and 502)
A. Tools and consumable materials
- 1 Voltmeter or 1 test set P/N 8270TB10 00200000
- Ground power unit
- Varnish (TB 07-906)
- Round sticker P/N Z00.N4815371035
B. Procedure
CAUTION : DURING THE OIL PRESSURE INDICATOR ADJUSTMENT OPERATION, THE ENGINE MUST BE SHUT DOWN AND THE OIL PRESSURE NIL.
1) Remove the engine monitoring cluster without disconnecting it - refer to Page 401.
2) For aircraft equipped with a ground power receptacle, connect the ground power unit - refer to 24-40-00.
3) Close main switch-breaker.
Adjustment without a test set
4) Connect the voltmeter to contacts (2) and (3) of the engine monitoring cluster test connector. Adjustment with a test set
4) Connect the test set connector to the engine monitoring cluster test connector. Set the test set selector to "Oil pressure" and turn on the test set.
All
5) For a zero oil pressure, adjust the output voltage with P5 potentiometer (1) to obtain a voltage of 0.055 V ± 0.01 V.
NOTE 1 : The electronic circuit ensures a time-delay of the indicator pointer, this can be annoying during the adjustment operations. This time-delay can temporarily be disabled during the adjustment operations by tripping the switch marked JP2 (4) on the printed circuit.
NOTE 2 : If tripped, once the adjustment operations completed, trip JP2 switch (4) back to its initial position.
6) Wait for about 20 seconds and check that the pointer is positioned one pointer thickness above the R.N. lower line within the red sector.
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本文链接地址：TB20 MAINTENANCE MANUAL 31 指示/记录系统 TB20飞机维护手册(14)
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