RKI Instruments GX-2001 Quik Start - Manual

1. Turning the GX-2001 ON
a. Press and hold the MODE/POWER button for one second to
turn the GX-2001 on.
b. The instrument will go through a brief warm up showing date,
time and battery power.
c. If the battery level is low or the battery icon is flashing and
the unit’s buzzer sounds, recharge the GX-2001 before use.
2. Measuring Mode Screen
a. After warm-up, the GX-2001 will beep and begin to scroll
showing current O2, H2S, CO and HC gas readings.
b. To view a particular gas reading press the DISP button to
scroll to the gas of interest. Reading will be displayed for
about 15 seconds, then begin to scroll again.
c. If the readings are not displaying fresh air values, (0 for H2S,
CO, and HC, and 20.9 for oxygen), it is necessary to perform
a Demand Zero.
3. Performing a Demand Zero
a. Find a fresh-air environment free of toxic or combustible
gases and of normal oxygen content (20.9%).
b. Press and HOLD the AIR button for about three seconds.
The display will indicate “hold”. When “Adj” is displayed,
release the AIR button. The GX-2001 will set the fresh air
values, 0% LEL HC, 20.9% O2, 0.0 ppm H2S and 0 ppm CO.
4. Performing a Breath Test
a. Performing a breath test quickly tests the GX-2001 oxygen
sensor, audible, visual and vibratory alarms for proper
operation. Performing a breath test is not a substitute for
calibration or performing a bump test on all sensors.
b. Turn the GX-2001 ON and allow GX-2001 to warm up.
c. Perform a Demand Zero.
d. Cup hands over sensor opening and gently exhale over the
sensors for 10 - 15 seconds.
e. The oxygen sensor output will drop below the alarm point of
19.5% and activate alarms.
f. Press the MODE POWER button to reset alarms when the
oxygen reading rises above 19.5%.
Quick Reference Guide For Model GX-2001
Turn on and adjust the GX-2001 gas monitor in a known fresh air area.