Setting The Units Of Measurement - GasTech GTA-4100R Operator's Manual

3.2.9

Setting the Units of Measurement

The range shown on the LCD screen can be adjusted to suit the different sensors being used on the GTA-4100R
card.
NOTE: The default unit of measurement is %LEL
Follow this procedure to change the range:
1. Ensure that the switch bank 2, position 6 (DisAL) is turned on before proceeding. The display will show
the alarm levels and direction.
2. Confirm that jumper JP5 or JP6 are in place.
3. Press and hold the F.Scale button for 3 seconds and the units of measurements will toggle through
each available option:
ppm
%LEL
%Vol
Vol
PPMm
LELm
NOTE: These units are standard but others can be configured on request.
4. Once the range has been set, you can remove jumper JP5 (top channel) or JP6 (bottom channel) to
stop accidental changes after installation.
Page 25
Parts per million
Percent of the Lower Explosion Limit
Percent by volume
Volume
Parts per million meters
Lower explosion limit meters
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