20 • Control Buttons
The fields also include the following:
• Gas — Lists the target gas for which the Before, After, and
A.Cal readings are displayed. The top CH4 is %LEL CH4
and the CH4 below the CO line is %volume CH4.
NOTE: The row for %volume CH4 shows information from the
most recent single calibration of the CH4 %volume
channel. The %volume CH4 channel cannot be
autocalibrated.
• Before — shows the settings prior to calibration.
• After — shows the settings after calibration.
• A. Cal. — lists the auto-calibration setting for each channel
of the GX-2003 unit. If a unit passes its calibration, the
“After” column should match the “A. Cal.” column. If the
unit fails calibration on any of its channels, those channels
will retain the previous calibration information.
Figure 10: Last Calibration Information: Calibration Record Option
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