RKI Instruments SDM-2012 Standalone Configuration - Manual (Page 40)

35 • Overview
Chapter 4: Operation
Overview
When you have completed the tasks in "Chapter 3: Preparing to Use the SDM-2012",
you are ready to use the SDM-2012 docking station. The SDM-2012 is capable of
performing bump tests and calibrations on the GX-2012 and the Gas Tracer. It can
also charge the optional rechargeable lithium ion battery pack in the instrument. This
chapter describes procedures for using the docking station to bump test, calibrate,
and recharge instruments in the standalone configuration of the docking station. It
also describes the information that is saved in the docking station’s memory and how
to save that information to a USB flash drive for use with the Single Module Data
Viewer Program.
Bump Testing a GX-2012
The following instructions apply to GX-2012s with one or more of the standard four
sensors (catalytic LEL, O
2
, CO, and H
2
S). They also apply to GX-2012s with a
%volume combustible sensor. See “Bump Testing a Gas Tracer” on page 57 for
instructions to bump test a Gas Tracer.
When a bump test is performed, the SDM-2012 performs a fresh air adjustment on a
GX-2012 and then applies calibration gas to the instrument. The docking station then
analyzes the response results based on criteria defined by the bump test check
tolerance parameter and determines if the instrument passed the bump test. The
bump test check tolerance is defined in “Bump Test Check Tolerance (CHE)” on
page 17. If the automatic calibration parameter is set to ON, then the SDM-2012 will
automatically perform a calibration if the bump test fails.
Do the following to perform a bump test on a GX-2012:
1. Confirm that the AC Adapter is connected to the SDM-2012 and to an AC wall
socket.
2. Press and hold the SDM-2012’s POWER button. The LEDs will turn amber.
3. When the BUMP
T
and CAL
S
LEDs turn off, release the POWER button.
4. The COPY LED will be off or on steadily and the CHARGE LED will be blinking
green if the SDM-2012 is operating properly or solid red if there is a system
failure. The amount of free memory in the SDM-2012 will dictate the condition
of the COPY LED (see “Available Memory in the SDM-2012” on page 92).
5. Install a GX-2012 in the instrument cradle. The plastic flap should be covering
the recess not in use. Flip the plastic flap over if it is covering the recess you
need to use.
6. Connect the gas out to instrument line to the inlet fitting on the GX-2012.