J.P. Instruments EDM-900 Installation Manual page 28

FAA Approved Installation Manual for the
EDM-900 and EDM-930
Primary Engine Data Management System
MAP SIG- GRN
MAP PWR RED
MAP SIG+ WHT
MAP GND BLK
Manifold Pressure Calibration
The manifold pressure must be calibrated to the ambient air pressure. Enter the current ambient barometric
pressure. The engine must not be running. This setting is not the same as the altimeter setting that you receive
from ATIS or Unicom. It will vary with field elevation. Use the chart below to calculate the MP FACTOR. Multiply this
MP FACTOR by the altimeter setting that you receive from ATIS or Unicom. For example if the field elevation is
1700 ft and the altimeter setting is 30.1, the MP FACTOR is 0.9400 from the table. Multiply 30.1 x 0.9400 to get the
ambient MP of 28.29.
Field MP
Elev. FACTOR
-500 1.0182
-400 1.0145
-300 1.0109
-200 1.0073
-100 1.0036
0 1.0000
100 0.9964
200 0.9928
300 0.9892
400 0.9856
500 0.9821
600 0.9785
700 0.9750
800 0.9714
900 0.9679
1000 0.9644
1100 0.9609
1
1200 0.9574
1300 0.9539
1400
1500 0.9469
1600 0.9435
1700 0.9400
1800 0.9366
1900 0.9332
2000 0.9298
2100 0.9264
2200 0.9230
2300 0.9196
2400 0.9162
2500 0.9129
2600 0.9095
2700 0.9062
2800 0.9028
2900 0.8995
3000 0.8962
MAP Sensor
connector
from engine
3100
3200
0..4 3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
Page 28 of 56 Rev I
Date 1-18-2013
MAP gage
T-fitting
0.8929
0.8896
0.8863
0.8830
0.8798
0.8765
0.8733
0.8700
0.8668
0.8636
0.8604
0.8572
0.8540
0.8508
0.8477
0.8445
0.8414
0.8382
0.8351
Report No 908
5000 0.8320
5100 0.8289
5200 0.8258
5300 0.8227
5400 0.8196
5500 0.8165
5600 0.8135
5700 0.8104
5800 0.8074
5900 0.8043
6000 0.8013
6100 0.7983
6200 0.7953
6300 0.7923
6400 0.7893
6500 0.7863
6600 0.7833
6700 0.7804