RKI Instruments EAGLE 2 Manual - Manual (Page 108)

98 • Calibrating Using the Single Calibration Method EAGLE 2 Operator’s Manual
12. Turn the knob clockwise to stop the gas flow, clamp down the hose clamp
and remove the regulator or dispensing valve from the cylinder.
13. Disconnect the tubing from the regulator or dispensing valve.
14. Open the hose clamp on the gas bag tubing.
15. Connect the tubing from the gas bag to the rigid tube on the probe. Allow
the gas to flow for one minute.
NOTE: If you are calibrating the catalytic combustible channel with a gas
concentration of 1000 ppm or lower, you must use a 24 inch
humidifier tube to connect the gas bag to the rigid tube on the probe.
16. Press and release the POWER ENTER RESET button to make the span
adjustment.
17. When the span adjustment is made, the EAGLE 2 calculates the range of
adjustment, minimum and maximum, it could have made based on its
response level to the applied gas. This calculated range is independent of
the calibration gas value that was entered in Step 8 and Step 9 above. The
adjustment range is included on the result screen to indicate the condition
of the sensor. If the calibration gas value is in the adjustment range, the
span adjustment will pass. If the calibration gas value is out of the
adjustment range, the span adjustment will fail.
18. If the span adjustment is successful, the following screens display.
In the example above, the EAGLE 2 could have adjusted the reading as
low as 35 %LEL and as high as 98 %LEL.
If the span adjustment is not successful, a screen displays that indicates a
calibration failure.
CH4 CALIBRATION
DONE
( 35 - 98%LEL)
REMOVE GAS
SELECT SENSOR
TO CALIBRATE
ESCAPE
> CH4 OXY
H2S CO
FAILED SENSOR
( 11 - 43%LEL)
<CH4>
ENTER TO CONTINUE