Spektrum AR7100 Series User Manual page 20

EN
Calibration
Important: When calibrating the system, the limiter percentages must be
adjusted to 100% normal and -100% in ST1.
During calibration the RevLimit stores the output limits of the Gear
channel. It's necessary to adjust the Gear channel output to 100% in both
directions during calibration.
1. Adjust the throttle operation so that the servo travel is near 100%
in both directions at full throttle and at full idle. This may require
lengthening or shortening the servo horn.
2. Make sure that the Gear channel is traveling 100% in both directions
when the switch that controls the limiter is flipped (flight mode on the
X9303 2.4GHz or Aux 2 on the DX7). The servo monitor is helpful here.
3. Set the throttle trim to the low (off) position.
4. With the throttle stick at low throttle, turn on the transmitter then turn on
the receiver; within three seconds toggle the switch that will control the
limiter. The ACT LED on the receiver will flash green indicating that the
calibration mode is successfully entered.
5. Raise and lower the throttle stick throughout its full range. The throttle
endpoint will be stored.
6. Exit the calibration mode by toggling the controlling switch twice. The
ACT LED will stop flashing, indicating a successful calibration was
achieved.
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7. To verify correct calibration, lower the throttle stick below the 25%
position and the ACT LED should turn off. Above 25% the ACT LED
(green) should be on.
Note: Calibration only needs to be performed when first setting up the
RevLimit, or when changing throttle servo throws, or if the unit is installed
in another helicopter.
To Verify the RPM Sensor is Functioning
With the system calibrated and turned on, rotate the engine over by hand
and note the SENS LED on the receiver. When the crankpin passes the rpm
sensor, the SENS LED will light red indicating the rpm sensor is working
properly.
Spektrum AR7100