Astra A5022, Руководство пользователя

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4
1.3 Switch Inputs
S1 S2
Fig 1
Except for variants with suffix -S, two push-button switches are provided for calibrating the
compass in the field.
When the A5022 is viewed from the front face with the LED facing, then Switch 1 is on the right and
Switch 2 is on the left.
1 Switch 1: Start the auto-calibration process
2 Switch 2: Set reference NORTH heading. The A5022 must be mounted upright
but at any azimuth. Pressing S2 sets the heading to zero and so can be done when the
whole installation is headed North.
3 Both together Pressing both together for at least one second causes the auto-
calibration process to halt and restores the previously saved calibration values.
1.4 Indicator light
A blue light indicates three states of the A5022.
State 1
Uncalibrated long flash
State 2 In the process of calibration continuous
State 3 Calibrated short flash
After the reset command
$PATC,IIHDG,0CV<CR><LF>
, the A5022 is uncalibrated and will have
a long flash.
Note that the LED can be turned off and on by the DLED command – see section 5.