RKI Instruments GX-2009 Quik Start - Manual

1. Turning the GX-2009 On
a. Press and briefly hold down the POWER MODE button. The
backlight will turn on and activate all LCD segments. Release
the button when you hear a beep.
i. If Cal C-LIMIT is displayed, unit is past due for calibration. Press and
release the POWER button to confirm and continue use.
ii. If FAIL C-LIMIT is displayed, unit is past due for calibration and cannot be
used without calibrating.
b. The instrument will go through a brief warm up showing date,
number of days to next calibration, time of day, battery power,
alarm latch setting, full scale values for all channels, warning
alarm setting and high alarm setting for all channels, STEL
alarm set point for H2S and CO and TWA alarm set point for
H2S and CO channels.
c. If the battery level is low or the battery icon is flashing and the
unit’s buzzer sounds, recharge the GX-2009 before use.
2. Measuring Mode Screen
a. After warm-up the GX-2009 will display the current O2, H2S,
CO and % LEL gas readings.
b. If the readings are not displaying fresh air values, it is
necessary to perform a Fresh Air adjustment.
3. Performing a Fresh Air Adjustment
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 Air CAL HOLD AIR. Continue to hold until
ADJ and RELEASE are displayed. Release the AIR button.
The GX-2009 will set to fresh air values, 0% LEL CH4, 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-2009 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. Cup hands over O2 sensor opening and gently exhale over
the sensor.
c. The oxygen sensor output will drop below the alarm point of
19.5% and activate alarms.
d. If alarms are set to latching, press the POWER MODE button
to reset alarms once oxygen reading is above 19.5%.
i. Note: You may also see slight response on the CO gas sensor when
performing a breath test.
Quick Reference Guide For Model GX-2009
Turn on and adjust the GX-2009 gas monitor in a known fresh air area.