J.P. Instruments EDM-900 Installation Manual page 5

FAA Approved Installation Manual for the
EDM-900 and EDM-930
Primary Engine Data Management System
Remote Alarm Light EDM 900
4.1
The remote alarm light is a Red or Yellow light depending on the alarm condition. The EDM-900 incorporates a
single light that alerts the pilot that a problem existing within the engine. This light is place in with the primary flight
instruments and required only if the display is more than 8 inches from the center of the instrument "T" to a max of
21 inches. It is a single light that changes color with condition and the label associated with the light must be lit by
a post light or such that you can see the word "ENGINE".
Remote Alarm Display (RAD) Operation EDM-930
4.2
The RAD is a 0.2" high, 8 character independent display found on the EDM-930 only. The RAD will still function if
the main display is inoperable. An alarm—such as the CHT is 480° on cylinder number 2—is displayed as
480CHT2. The label CHT2 will flash whenever an over-temperature exists and will extinguish when the temperature
falls below the limit temperature. Other alarms would be displayed as, for example: 2780 RPM.
The RAD is located directly in front of the pilot and displays digital caution and limit excedances when any of the
parameters have reached its preset trigger point. Whenever limit alarms are not triggered, the RAD continuously
displays MAP and RPM.
On initial startup or whenever power is turned on, the words EDM-930 PRIMARY" are displayed, followed by the
make and model of the aircraft with STC information for which the primary limits were set
Alarm hierarchy for the EDM-900/930
When a measurement limit is reached, the pilot should momentarily depress the STEP button on the EDM-900/930
instrument to extinguish the particular flashing alarm acronyms. If another function has also reached its limit, that
label will then begin to flash. The pilot should continue to monitor the affected parameters as he would if a
conventional analog display had reached a limit. The bar graph functions of CHT, EGT, and TIT remain displayed
for easy reference should one of these limits be reached. Alarm hierarchy is shown in the table below.
1. OILP_LO.
2. FP_LO.
3. OILT_HI.
4. CHT.
5. TIT.
Dimming
Automatic dimming is provided to dim both the panel display and the remote alarm display. Dimming can also be
accomplished manually to change the Automatic setting. Tapping the far right button below the display decreases
brightness. Continuously holding this button increases brightness
6. FLVL. 11. CLD.
7. REM. 12. RPM.
8. FP_HI. 13. OILT_LO.
9. MAP. 14. VOLTS.
10. DIF. 15. OILP_HI.
16. AMPS.
17. CDT.
18. RES.
19. EGT.
20. Fuel Flow.
. The display starts up in the max brightness mode.
Report No 908
Page 5 of 56 Rev I
Date 1-18-2013