65 • Calibrating a GX-2012
Calibrating a GX-2012
The following instructions apply to GX-2012s with one or more of the standard four
sensors (catalytic LEL, O
2
, H
2
S, and CO) when you are using only a 3-gas or 4-gas
cylinder. RKI Instruments, Inc. recommends using a 3-gas or 4-gas cylinder instead
of multiple cylinders for calibrating standard instruments. These instructions also
apply to GX-2012s with a %volume sensor installed when you are using a 3-gas or 4-
gas mix and a %volume calibration cylinder. For instructions to calibrate a Gas
Tracer, see “Calibrating a Gas Tracer” on page 95.
The PC Controller Program is capable of performing a calibration both manually and
automatically on a GX-2012. When a calibration is performed, the PC Controller
Program performs an air adjust operation on a GX-2012 and then applies calibration
gas to the GX-2012. The PC Controller Program analyzes the calibration results and
determines if the GX-2012 passed the calibration.
To manually calibrate an instrument or instruments:
1.
Establish a connection between the SDM-2012, GX-2012, and the PC
Controller program as described in “Connecting Instruments to the PC
Controller Program” on page 43.
2.
Verify that all of the calibration parameters are set correctly. See “Setting Up
the Configuration” on page 32 for instructions.
3.
Verify that the appropriate calibration gas cylinder or cylinders is connected to
the appropriate SDM-2012 or manifold line.
4.
Ensure that the gas out to GX-2012 line is connected to the inlet of the
GX-2012 and that the exhaust line is connected to the exhaust fitting of the
GX-2012.
