RKI Instruments SM-2009U - Manual (Page 17)

Setting the Bump Test and Calibration Parameters • 13
CAUTION: The maximum recommended length for the exhaust tube is
10 feet. Do not use more than 10 feet of tubing or tubing with
an ID of less than 5/16” for the exhaust tube or the bump test
and calibration accuracy will be adversely affected. The tube
that is shipped with the SM-2009U has an ID of 5/16” and is
10 feet long.
6. Install the 3 foot long 3/16” ID tube that is included with the
SM-2009U on the CAL. GAS fitting.
Setting the Bump Test and Calibration
Parameters
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 a unit 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 bump test and calibration parameters are saved in the SM-2009U’s
memory. If a parameter is changed with one particular GX-2009 installed
in the SM-2009U, the change will be in effect for the bump test or
calibration of any subsequent GX-2009 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
beginning with “Turning On the SM-2009U with a GX-2009” on page 15.