User Manual

6
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41
CO
2
Calibration
CO
2
calibration can be performed using calibration gas. Calibration should be conducted every 6
months or when any measurement error is found.
1. Press the
Configuration key to display the configuration menu for CO
2
Cal. key
display.
2. Press the CO
2
Cal. key to display the calibration menu.
Due to precision matter, CO
2
calibration can not be started until 20 minutes has elapsed after the
power is turned ON.
During this time, Start Cal
key will be displayed in gray which indicates that the key is
ineffective.
The message, “Calibration not ready” and the remaining time for preparation will be displayed.
＜
Preparing for calibration
＞ ＜
Start calibration
＞
3. Press the Start Cal key and conduct calibration according to the displayed messages.
4. The message, “Feed CAL. GAS” will be displayed. Press the injection button to inject the
calibration gas.
5. The message, “Calc. Gas can be removed” will be displayed. Stop pressing the injection
button to cease the injection.
6. The message, “CAL. OK” will be displayed. “Last Cal. Date” will be updated to the current
date.
If any of the following messages is displayed, start the procedure again from step 2.
“CAL. error”, “CAL GAS error”, “Auto Zero fail”, “No stable gas flow”, “CAL. failure”
7. Press the Cal Complete key to end the calibration.
CAUTION
?
Perform calibration after 20 minutes from turning ON the power of the
DS-7100 system.
?
Do not disconnect the sampling tube during calibration.
If disconnected, calibration will cease.
6
CO
2
Concentration