RKI Instruments SDM-2012 Standalone Configuration - Manual (Page 21)

Setting the Operational Parameters in Edit Mode • 16
Setting the Operational Parameters
in Edit Mode
Once the hardware has been assembled, use Edit Mode to confirm or adjust the
bump test and calibration parameters, the H
2
S gas inlet parameter (GX-2012 only),
and the WET/DRY setting (Gas Tracer only) before using the SDM-2012.
The bump test parameters define how long fresh air and calibration gas are applied to
an instrument during a bump test. They also define the tolerance used in determining
whether an instrument fails or passes a bump test and whether or not a calibration
automatically takes place if a bump test fails. The calibration parameters define how
long fresh air and calibration gas are applied to an instrument during a calibration.
The H
2
S gas inlet parameter defines what gas inlet fitting (GAS 1 or GAS 2) will be
used for H
2
S during bump tests and calibrations. This setting applies to GX-2012s
only since Gas Tracers do no have H
2
S sensors installed. The WET/DRY setting
defines the type of gas that will be used for the fresh air adjustment and for calibration
gas during the bump testing and calibrating of the ppm combustible gas sensor. This
setting applies only to Gas Tracers.
The bump test and calibration parameters are saved in the SDM-2012’s memory. If a
parameter is changed with one particular instrument installed in the SDM-2012, the
change will be in effect for the bump test or calibration of any subsequent instruments
until the parameter is changed again.
Bump Test & Calibration Parameters
There are four bump test parameters and two calibration parameters. The two
calibration parameters, air sample time and calibration gas sample time, are also
bump test parameters. The parameters are described below. Table 3 below shows
the factory settings for the bump test and calibration parameters. If you wish to use
the factory settings, then you do not need to make any parameter adjustments. If you
wish to confirm or change the parameter settings, follow the instructions below in
“Setting the Bump Test Parameters” on page 21 or “Setting the Calibration
Parameters” on page 23.
Table 3: Bump Test & Calibration Parameter
Parameter
Display
Tag
Available
Choices
Bump Factory
Setting
Cal Factory
Setting
Air Sample Time AIR • 30 seconds
• 45 seconds
• 60 seconds
• 90 seconds 30 seconds 30 seconds
Calibration Gas
Sample Time GAS • 30 seconds
• 45 seconds
• 60 seconds
• 90 seconds
• 120 seconds 30 seconds 90 seconds