RKI Instruments GX-2001 Quik Start - Manual (Page 2)

Quick Reference Guide For Model GX-2001
5. Sensor Failure
a. If the GX-2001 experiences a sensor failure during start up,
the LCD will indicate FAIL in place of the gas reading for
the sensor that has failed. To continue operation press and
release the MODE POWER button to acknowledge the failure.
Gas readings for that sensor will be replaced by dashes.
b. It is necessary to replace sensor and calibrate before the
GX-2001 is used.
6. Displaying Peak Readings
a. With the GX-2001 in measuring mode, press the MODE/
POWER button once to put the GX-2001 in Peak Reading
Mode. A small peak (upside down for O2) symbol is
displayed in the lower left of the LCD.
b. Press the DISP button to cycle through the four target gases.
c. Peak readings with peak symbols are displayed on the LCD
and show the maximum exposure encountered for HC, CO
and H2S plus minimum and maximum exposure for O2
since the GX-2001 has been turned ON.
d. Peak readings are reset once the GX-2001 is turned OFF.
7. Displaying STEL and TWA Readings
a. The STEL stands for short-term exposure limit and shows
the average reading for H2S and CO during the last 15
minutes. TWA stands for time-weighted average and is the
average reading for the last 8 hours.
b. With the GX-2001 in Measuring Mode, press the DISP
button to select either H2S or CO then press the MODE
POWER button twice to display the STEL then once again to
display the TWA.
8. Turning the GX-2001 Off
a. Press and hold the MODE POWER button until the GX-2001
turns off.
9. Consult the operator’s manual for further information
PN 71-0127RK Rev A
RKI Instruments, Inc. 33248 Central Ave, Union City, CA 94587
Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com