RKI Instruments GX-2003 Manual - Manual (Page 69)

GX-2003 Operator’s Manual Using Setup Mode • 62
3. Install the hose and probe to the GX-2003.
4. From the main menu, place the cursor next to the AUTO
CALIBRATION menu item. Press and release the POWER ENTER
button to display the calibration values screen.
The gas concentrations displayed in the calibration values screen
must match the gas concentrations listed on the 4-gas calibration
cylinder. If all concentrations match, go to step 9. If one or more
concentrations do not match, continue with step 5.
5. To adjust the values on the screen, hold down the (SHIFT)▼
button, then press the DISPLAY(ADJ) button and release both. The
CH
4
calibration value begins to flash.
6. If necessary, use the ▲AIR and (SHIFT)▼ buttons to set the correct
combustible gas value.
7. Press and release the POWER ENTER button to enter the new
setting. The OXY calibration value begins to flash.
8. Repeat steps 6 and 7 to set the correct values for the remaining
channels. After the last channel is set, you return to the calibration
values screen and the values are no longer flashing.
NOTE: The RKI Four Gas Cylinder typically contains 12% O
2
by
volume. Be sure to set the “OXY” reading to agree with the
concentration listed on the cylinder’s label, not zero.
9. With the calibration values screen displayed, press the
POWER/ENTER button. CAL. along the left side of the LCD
begins to flash and the current gas readings are displayed.
10. Connect the tubing from the demand flow regulator to the rigid
tube on the probe. Allow the gas to flow for one minute.
11. Press and release the POWER/ENTER button to set the calibration
to the programmed values.
C CH4 50%LEL
A OXY 12.0VOL%
L H2S 25.0ppm
. CO 50ppm
21:09
C CH4 0%LEL
A OXY 20.9VOL%
L H2S 0.0ppm
. CO 0ppm
21:09