Select “Cal Zero” and press the ENTER key to lock that selection.
Press the SETUP/RUN key to return to RUN mode.
The display will read -
CO Calibration
2
.......
The zero calibration takes about 50 seconds and as the calibration progresses, more ‘.’ symbols will appear on the
display.
After the calibration is complete, the option in set-up 12 will return to “CO
2
Cal Done”.
CO
2
SPAN CALIBRATION
Insert the sample hypodermic needle into a hose from a gas supply of 100% CO
2.
Open the gas supply and let at least 1 litre per minute flow through the hose. (The 9070 will draw less than 0.5 lpm)
Leave the 100% gas flowing through the Analyzer for at least 30 seconds.
Use the function keys to get to set-up mode number 12, “CO
2
Calibrate”.
Select “Cal Span” and press the ENTER key to lock that selection.
Press the SETUP/RUN key to return to RUN mode.
The display will read -
CO Calibration
2
.......
The span calibration takes about 40 seconds and as the calibration progresses, more ‘.’ symbols will appear.
After the calibration is complete, the option in set-up 12 will return to “CO
2
Cal Done”.
NOTE: It is important that the gas flow rate is the same when using the calibration gas and the sampling gas.
NOTE:
Watch for an alarm on completion of the calibration. If the alarm light is flashing, press the alarm button. If a “Cal Fail
Alarm” is present as a new alarm (the word acc, in lower case, is at the right hand end of the alarm message), the
calibration has NOT been completed successfully. The cause will be because
The gas flow was not stable or
The ambient temperature is too high ( > 45°C (>110°F) )
Re-start the calibration by selecting set-up 12.
Page 22 Teledyne Analytical Instruments 9070 Oxygen Analyzer
