GX-3R Pro Operator’s Manual
Chapter 3: Operation
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Chapter 3: Operation
Overview
This chapter explains how to perform confined space entry monitoring or general area monitoring
in the GX-3R Pro’s Measuring Mode.
Start Up
This section explains how to start up the GX-3R Pro, get it ready for operation, and turn it off.
WARNING: A thin protective film covers the display to prevent scratches during shipping.
Remove this film before use. Leaving the film installed voids the intrinsically safe
certification.
NOTE:
The screens illustrated in this section are for a 4-gas + 0 - 10.00% volume CO
2
unit. The
screens displayed by your GX-3R Pro may be slightly different.
Turning On the GX-3R Pro
To illustrate certain functions, the following description of the GX-3R Pro start up sequence
assumes that the following menu items are turned on:
LUNCH BREAK
,
CAL REMINDER
,
and
BUMP REMINDER
in User Mode, and
ID DISPLAY
and
AUTO ZERO
in Maintenance
Mode. If any of these items are turned off, then the corresponding screens will not appear.
1. Press and briefly hold down POWER MODE. Confirm that the LCD turns on, the LEDs flash,
the buzzer sounds, and the motor vibrates before continuing with operation. Release the
POWER MODE button when you hear a beep.
2. If
LUNCH BREAK
is set to
ON
(factory setting is
OFF
, see page 106), the Lunch Break
Screen appears. The unit counts down from 5 seconds.
a. Continue
Accumulating: To continue accumulating peak and time-weighted average
(TWA) readings from the last time the GX-3R Pro was used, press and release POWER
MODE or allow the countdown to reach 0. The short-term exposure limit (STEL) reading
is reset each time the GX-3R Pro is turned on.
b. Reset
Accumulation: To reset the accumulation of peak and time-weighted average
(TWA) readings, press and release AIR before the countdown reaches 0.
7:49
5 SEC
NO :AIR
LUNCH BREAK
7:49
5 SEC
YES :MODE
LUNCH BREAK
