FAA Approved Installation Manual for the EDM-960 system
Report No 909
Primary Engine Data Management System
Page 33 of 45 Rev C
Date 12-12-12
32.1.1 Programming the Horsepower Constant
You must adjust the HP Constant once for your aircraft. You must perform this adjustment in the air while the aircraft is
in flight between 5,000 and 8,000 feet MSL.
1.
Enter the pilot program mode by simultaneously holding the STEP and LF buttons for five seconds.
2.
Tap STEP repeatedly until you see—for example— HIP = I25. Then hold both the STEP and LF buttons display
until you see ADJUST, followed by HIP= I25. The adjustment range for the HP Constant is 45 to 180.
3.
Set the MP and RPM per your POH to 70 percent power. Let conditions stabilize.
4.
Change the HP reading on the EDM-960 to 70 percent by adjusting the HP constant in the lower display by holding
or tapping the LF button. Percent HP should be close to 100 percent during takeoff at sea level.
5.
Tap the STEP button to proceed to the next step.
32.1.2 Programming the MAP
Sets the manifold pressure calibration (an sets the Carbureted fuel pressure zero points).
You may need to correct the MAP based on the altimeter setting at a sea level airport.
1.
Enter the pilot program mode by simultaneously holding the Step and LF buttons for five seconds.
2.
Tap Step/OK repeatedly until you see—for example— HP Constant=125. Then hold both the first two buttons
Step/OK and Change buttons display until you see Adjust, followed by HP Constant=125.
3.
Again, Hold both the two buttons, Step/OK and Change buttons display until you see ADJUST, followed by
MAP+0. The adjustment range for the MAP is ±3.0 in Hg. As you adjust the MAP up or down you will see a
change in the MAP gage under RPM. When you see the correct setting stop.
4.
Tap the Step/OK button to proceed to the next step or hold both buttons again to exit setup.
Do this one time and only if the MAP on your manifold pressure gauge doesn't match the MAP shown on the EDM-960
You must do this on the ground with the engine turned off.
A. Absolute calibration: the table below shows the MAP for a given field elevation (down the left side of the table)
and altimeter setting (along top row of the table). Find the entry in the table most closely matching your field
elevation and current altimeter setting. Interpolate if necessary.
Alt setting->
field elev.
29.0
29.2
29.4
29.6
29.8
29.9
30.0
30.2
30.4
30.6
30.8
31.0
0
29.0
29.2
29.4
29.6
29.8
29.9
30.0
30.2
30.4
30.6
30.8
31.0
1000
28.0
28.2
28.4
28.5
28.7
28.8
28.9
29.1
29.3
29.5
29.7
29.9
2000
27.0
27.1
27.3
27.5
27.7
27.8
27.9
28.1
28.3
28.5
28.6
28.8
3000
26.0
26.2
26.3
26.5
26.7
26.8
26.9
27.1
27.2
27.4
27.6
27.8
4000
25.0
25.2
25.4
25.6
25.7
25.8
25.9
26.1
26.3
26.4
26.6
26.8
5000
24.1
24.3
24.5
24.6
24.8
24.9
25.0
25.1
25.3
25.5
25.6
25.8
6000
23.2
23.4
23.6
23.7
23.9
24.0
24.0
24.2
24.4
24.5
24.7
24.8
7000
22.4
22.5
22.7
22.8
23.0
23.1
23.1
23.3
23.5
23.6
23.8
23.9
Unless your airfield is close to sea level, do not set MAP to the local altimeter setting since that setting is the pressure
corrected to sea level, and is not the same as your field elevation pressure.
Tap or hold the LF button to change the MAP value.
Tap the STEP button to proceed to the next item.
