4.10 Probe Alerts
Figure 4.13: Probe Alerts
The VARIO SD allows relating alerts with some probes values (see Figure
4.13
). A short description of
each alert is sown in Table
4.4
.
Table 4.4: Probe Alerts
Alert
Description
Pulse Threshold
Pulse Threshold above which the pulse data eld will toggle be-
tween inverted numerical display and normal numerical display.
This allows the user to quickly see that they have a pulse above
the desired level..
Stall
IAS speed value starting which a alarm is triggered (TAS Probe
needed).
4.11 Calibration
All models of the new Flymaster SD series include a magnetometer and accelerometer sensor. Using these
sensors the VARIO SD can provide G-Force and magnetic compass heading. Even though the compass
is digital there is a tilt compensation algorithm that ensures accurate compass heading even when the
VARIO SD is inclined.
The Calibration menu option allows the user to calibrate the VARIO SD accelerometer and magnetometer
sensors. Calibration is particularly important for the magnetometer since without it you will get inaccurate
data from the compass. Despite all Flymaster instruments being factory calibrated errors can be introduced
due to several external inuences, such as the presence of strong magnetic elds or the time. In order
to eliminate these errors a proper magnetometer calibration should be made. Calibration parameters are
kept when the VARIO SD is turned o, reset or when a rmware update is done. The magnetometer
calibration process is described in Section
6.2
.
The VARIO SD magnetic compass is very sensible to external magnetic elds. In order to
get good readings ensure that there are no interference sources nearby.
22
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