RKI Instruments GX-2003 Manual - Manual (Page 46)

39 • Overview GX-2003 Operator’s Manual
Chapter 4: Using the GX-2003 in Bar Hole Mode
Overview
This chapter explains how to operate the GX-2003 in Bar Hole Mode.
Bar Hole Mode is used to perform consistent checks of bar holes when
tracking down underground gas leaks. When the GX-2003 is in Bar
Hole Mode, only the combustible and oxygen sensors are displayed.
If a GX-2003 is intended for bar hole testing, it is shipped with Bar
Hole Mode and Leak Check Mode enabled so that the operator must
chose which operational mode to use when the unit is turned on (see
“Turning LB Mode Display On or Off” on page 66).
Start Up, Bar Hole Mode
This section explains how to start up the GX-2003 in Bar Hole Mode
and get it ready for operation.
Turning On the GX-2003, Bar Hole Mode
WARNING: If a CO or H
2
S sensor is installed, these sensors will not
be active while the GX-2003 is in Bar Hole Mode.
WARNING: Gas alarms are not active when the GX-2003 is in Bar
Hole Mode.
The following description of the GX-2003 start up sequence assumes
that the following menu items in Setup Mode are turned on: USER/
STATION ID, and CAL. TIME REMAINING. If either of these items is
turned off, then the corresponding screen will not appear.
NOTE: In order for BAR HOLE MODE to appear as a selection in the
Mode Select Screen in Step 3 below, the GX-2003 must have
both a % volume combustible sensor and an LEL/PPM sensor
installed. If a GX-2003 has only the LEL/PPM sensor
installed, then BAR HOLE MODE will not appear as a choice
as shown in Step 3 below and NORMAL MODE and LEAK
CHECK MODE
will be the only choices displayed. In this
case, see “Turning On the GX-2003 in Normal Mode With All
Modes Active” on page 17 or “Turning On the GX-2003, Leak
Check Mode” on page 46.