MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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Neither this document nor any part hereof may be reproduced or transferred to
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purpose except as specifically authorized in writing by MD Helicopters, Inc.
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1999 − 2016 by MD Helicopters, Inc.
Table 502. Instrument Cluster Three − Pack Calibration Charts −
369D296305 − 21, − 31 Units (Late Model)
Gauge
Graduation
Sensor Ohms
Angular
Degrees
Tolerance
(Pointer
Width)
Remarks
Min Max
Fuel Quantity Gauge
F (Full) 88 99 − 35
±
1/2 Ascending Pointer
3 68 80 − 30
±
1 Ascending Pointer
2 52 59 − 16
±
1 Descending Pointer
1 30 37 +10 − 1 Descending Pointer
Redline 8 10 +30 +0, − 1 Descending Pointer
E (Empty) 0 4 +35 +0, − 1 Descending Pointer
Engine Oil Temperature Gauge
NOTE:
Use 0 − 900 ohm variable resistor across
ENG OIL TEMP SEND
and ground stud.
15
°
C 600 1060 +31.0
±
1 Ascending pointer
30
°
C 450 650 +26.0
±
1 Ascending pointer
54
°
C 287 307 +12.0
±
1 − 1/2 Ascending pointer
107
°
C 101 109 − 24.0
±
1 − 1/2 Ascending pointer
125
°
C 60 85 − 31.0
±
1 Ascending pointer
Ammeter
NOTE:
Ammeter is a millivolt meter. It may be tested using a dry cell battery with 1 volt output and a 5 watt poten-
tiometer. Connect test wire to arm of potentiometer and across positive terminal of battery for positive test
readings or negative terminal for negative reading. Adjust potentiometer to required millivolt level. Apply load
to load stud of ammeter being checked.
− 150 − 425 − 555 +30.0
±
1.0
− 75 − 180 − 310 +15.0
±
1.0
0 − 33 +33 0.0
±
0.25
+75 +180 +310 − 15.0
±
1.0
+150 +490 +555 − 30.0
±
1.0