Astra A5040 Panduan Pengguna - Halaman 4

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1.3 Switch Inputs

Except for variants with suffix -S, two push-button switches are provided for calibrating the

compass in the field.

When the A5040 is viewed from the front face with the LED facing, then Switch 1 is on the right and

Switch 2 is on the left.

Switch 1:

Switch 2:

but at any azimuth. Pressing S2 sets the heading to zero and so can be done when the

whole installation is headed North.

Both together

calibration process to halt and restores the previously saved calibration values. (Equivalent

to sending the XCL command (see section 5.2)

1.4 Indicator light

A blue light indicates four states of the A5040 by the patterns of its flashing.

After the reset command, $PATC,IIHDG,0CV<CR><LF>, the A5040 is uncalibrated and the blue

indicator will show a VQF3 flash.

Note that the LED can be turned off and on by the DLED command – see section 5.

The indicator can show the following patterns:

VQF1 Fluxgate calibrated A single flash repeated

VQF2 Fault. A double flash repeated.

VQF3 Fluxgate not calibrated – the flashes are grouped in threes

VQF4 Fault. The flashes are grouped in fours.

Fig 1

Start the auto-calibration process

Set reference NORTH heading. The A5040 must be mounted upright

Pressing both together for at least one second causes the auto-