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The right magnet
allows the CAN address of the sensor to be changed. WHEN the ADDRESS menu is
displayed with a prompt to remove the magnet, and then the display shows the address and that the right
magnet will decreases it whilst the left magnet will increase it. This is then stored in internal non volatile
memory and the display will automatically revert to normal operation.
The centre magnet
is used to inhibit the sensor. As with the left and right magnet functions the display
requests that you remove the magnet and then the state of the inhibit appears on the LCD. The left magnet
then puts the sensor into inhibit whilst the right magnet removes it. An amber LED on the front panel
under the LCD flashes when the sensor is inhibited. When all magnets are removed, the display will revert
to normal operation.
The left and right magnets together allow the calibration menu to be used.
Removing both magnets as instructed on the LCD presents the first part of this multi menu which is ZERO.
With no gas present use the left magnet to increase the reading and the right magnet to decrease to
achieve a zero reading on the displays. A timer is displayed on the LCD and when this reaches 0, the next
menu is displayed. This timer is 15 seconds approximately and is reset back each time a magnet is near.
This timeout can be speeded up by placing a magnet near to the centre position.
SPAN is the next part of the menu and gas should be applied to the sensor at this time.
The left magnet increases the gain and the right magnet reduces gain. The actual sensor value can be seen
on the display to rise or fall respectively.
LOW ALARM is the next menu and left and right magnets increase and decrease this value.
HIGH ALARM is next followed by over range alarm.
The direction of the alarms is displayed as ^ for rising and v for falling but these can be changed using left
and right magnets together.
WatchGas Technical Sheet ref C1882A v2.0 07-10-22
©2022 WatchGas B.V.
WatchGas is dedicated to continuously improving its products. Therefore, the specifications and features mentioned in this datasheet are subject to change without prior notice.
