Bump Testing GX-2012s and Gas Tracers • 178
Appendix A: Multiple Instrument Configurations
RKI Instruments, Inc. recommends bump testing and calibrating GX-2012s and Gas
Tracers separately. If desired or needed, however, GX-2012s and Gas Tracers can
be bump tested and calibrated at the same time using the PC Controller Program. If
you are going to test the instruments together, do not manifold the different types of
instruments together. Create a manifold for the docking station(s) testing the GX-
2012(s) and a manifold for the docking station(s) testing the Gas Tracer(s). See
“Assembling a Manifold for Multiple SDM-2012 Units” on page 15 for instructions and
guidelines to manifold SDM-2012s. Be sure to use a 3-gas mix when testing the Gas
Tracers. Do not use a 4-gas mix because the H
2
S in the cylinder adversely affects the
ppm combustible sensor.
Bump Testing GX-2012s and Gas Tracers
The following instructions apply to standard GX-2012s that contain the standard
sensors (catalytic LEL, O
2
, H
2
S, and CO) as well as standard Gas Tracers that
contain the standard sensors (catalytic LEL, ppm combustible, O
2
, and CO). They
also apply to GX-2012s and Gas Tracers that have a %volume combustible gas
sensor installed. See “Bump Testing a GX-2012” on page 52 or “Bump Testing a Gas
Tracer” on page 77 for instructions to bump test a GX-2012 or Gas Tracer,
respectively.
The PC Controller Program is capable of performing a bump test both manually and
automatically when an instrument is connected to it. When a bump test is performed,
the PC Controller Program performs an air adjust operation on an instrument and
then applies calibration gas to the instrument. The program analyzes the response
results based on predefined criteria and determines if the instrument passed the
bump test.
The criteria that the PC Controller Program uses to determine if the instrument
passes a bump test, whether the Bump Test button is active, and whether or not the
PC Controller Program automatically performs a bump test if it is due on a connected
instrument is defined in the Parameter tab of the Configuration Window. See "Setting
Up the Configuration" step 9 on page 35 for a description of the bump test
configuration setup.
NOTE:
The PC Controller program performs a complete bump test on the ppm
combustible sensor in the Gas Tracer first. Be sure that the 1000 ppm
methane calibration cylinder is connected to the GAS 2 fitting on the
back of any SDM-2012(s) with Gas Tracers installed using a 6 inch
humidifier tube.
To manually bump test instruments:
1.
Establish a connection between the SDM-2012, the instruments, and the PC
Controller program as described in “Connecting Instruments to the PC
Controller Program” on page 43.
2.
Verify that all of the bump test parameters are set correctly. See “Setting Up
