RKI Instruments GX-2003 Manual - Manual (Page 71)

GX-2003 Operator’s Manual Using Setup Mode • 64
NOTE: To display the CO sensor, use the (SHIFT)▼button to move
the cursor to the bottom of the screen and then press it again
to advance to the next screen.
5. Use the ▲AIR or (SHIFT)▼ button to place the cursor next to the
sensor you want to calibrate (in this example the combustible gas
%LEL sensor).
6. Press and release the POWER/ENTER button. The single
calibration screen displays for the sensor you selected. The gas
reading flashes.
7. Connect the tubing from the demand flow regulator to the rigid
tube on the probe. Allow the calibration gas to flow for one
minute.
8. If necessary, use the ▲AIR and (SHIFT)▼ buttons to adjust the
reading to match the concentration listed on the calibration
cylinder.
9. Press and release the POWER ENTER button to save the span
value. The LCD will indicate that the calibration has ended, then
the single calibration menu displays.
10. Disconnect the tubing from the GX-2003’s probe.
11. Repeat steps 5 through 10 for any other channels you want to
calibrate. Make sure you use an appropriate calibration cylinder
for each channel.
CAUTION: When calibrating the oxygen channel, verify the concentration
of oxygen listed on the cylinder’s label. For oxygen-free samples
(100% nitrogen for example), set the oxygen zero setting to
0.0%.
12. After the last channel is calibrated, disconnect the calibration
tubing from the probe, then unscrew the demand flow regulator
from the calibration cylinder.
13. With the Single Calibration menu displayed, press the (SHIFT)▼
button until the cursor is next to the ESCAPE menu item.
14. Press and release the POWER ENTER button to return to the main
Setup menu.
CH4 CALIBRATION
0% LEL
APPLY GAS
ADJ/ENTER
21:09