Horizon Fitness P-1000 Installation Instructions Manual page 15

15 Turn on the main power switch and verify the P-1000 again turns on.
16 Press and hold the left button and verify the integer portion of the engine hours is correct as ordered. Release the switch and verify that the
decimal portion of the engine hours is correct.
17 Tap the left button and note that the left magneto signal loss indicator begins flashing. This indication shows that the left internal tachometer
has been masked from the display. Press the button again to stop the flashing.
18 Tap the right button and note that the right magneto signal loss indicator begins flashing. This indication shows that the right internal
tachometer has been masked from the display. Press the button again to stop the flashing.
19 Tap the center button to dim the indicators, tap it again to restore to full intensity.
20 Prepare the aircraft for a safe engine start. Start the engine. The P-100 will show RPM within 2 seconds of engine starting. This startup period
is used to train the tachometer. The display should faithfully follow the engine speed. Because cold engines, and engines operating out of their
power bands will operate roughly, the tachometer can show sizable engine RPM variation.
21 At a suitable run-up area, perform a magneto drop check per your aircraft's flight manual. Remember to maintain the ignition switch at each
position for a minimum of ten seconds, and always return to the "Both" position between grounding each agneto, ie. Move the switch as
follows: BOTH-LEFT-BOTH-RIGHT-BOTH. As each magneto is grounded, not the LCD will show the change in engine RPM. This display lasts
for 15 seconds, and then actual RPM is presented on the LCD.
22 Return the engine idle. Press the "Trap" button and hold it. Observe the maximum engine RPM achieved during the run-up operation.
23 Press and hold the "Clear" button. The LCD will show zero.
24 Press the "Trap" button and hold it again. Observe the maximum engine RPM achieved since the "Clear" button was pressed.
25 If possible, during engine operation compare the P-1000 RPM readings to your mechanical tachometer to verify that the P-1000 is operating
properly.
26 Return the aircraft to the work area, and shut off.
27 Remove the mechanical tachometer and store.
28 Remove the tachometer drive cable and housing.
29 Patch the firewall hole using proper and approved materials and procedures.
30 Install the dust cap over the engine's tachometer drive attachment. Insure that the cap is rightly installed and won't shake loose. Use safety
wire to secure cap in place. Periodically check the cap for proper fit, tightness, and oil leakage during its installation life.
31 Safety wire the cable to the tachometer. Two separate loops of stainless steel wire can be looped through each side of the connector and
through corresponding drilled fillister head screw on the P-1000.
32 Install the P-100 in the instrument panel.
HORIZON INSTRUMENTS, INC. P-1000 INSTALLATION & INSTRUCTION MANUAL
Title:
P103050 E
Number: Revision:
15 of 23
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