Delta OHM HD21ABE, Manual

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Confirm with ENTER. The following screen will appear:
PROBES CALIBRATION
CO CALIBRATION
CAL ZERO
Cal zero 0 ppm
<ESC> exit/cancel
<ENTER> confirm
•
Wait about 15 minutes before continuing.
•
Supply the gas adjusting the bottle flow meter to get a constant flow from 0.1 to 0.2 l/min.
•
Press ENTER and wait the two minutes necessary for calibration without changing the
working conditions.
•
At the end, close the bottle spigot and remove the cap from the CO sensor.
•
Insert the protection grid.
Sensitivity of the CO sensor:
The sensitivity in nA/ppm of the CO sensor is already set at the factory. If you need to chage it,
follow this procedure:
1. Use the arrows ▼▲ to select the 2) Calibration CO item:
PROBES CALIBRATION
1) Calibration CO
2
2) Calibration CO
3) Calibration RH
▼▲
select
<ESC> exit/cancel
<ENTER> confirm
2. Confirm with ENTER. The following screen will appear:
PROBES CALIBRATION
CALIBRATION CO
1) Cal zero
2) Set sensitivity
▼▲
select
<ESC> exit/cancel
<ENTER> confirm