Delta OHM HD21ABE17, Operating Manual

Page: 27 / 48

HD21ABE17 - 27 - V2.0
14. Adjust the value by using the arrows ▼▲ .
15. Press ENTER on the instrument and wait the time necessary for calibration
without changing the working conditions.
16. When the “CALIBRATION GOOD” indication appears, press ESC to return to the
calibration menu.
Restoring the factory CO
2
calibration:
In case of erroneous execution of the calibration procedure, it is always possible to get
back to the factory calibration by selecting the 3) Restore Fact cal calibration option.
CO C
ALIBRATION
You can calibrate the zero of the CO sensor in clean air (the CO concentration is
lower than 0.1 ppm outdoor) or using nitrogen bottles.
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
Confirm with ENTER. The following screen will appear:
PROBES CALIBRATION
CALIBRATION CO
1) Cal zero
2) Sensitivity set
▼▲
select
<ESC> exit/cancel
<ENTER> confirm
Confirm with ENTER. The following screen will appear:
PROBES CALIBRATION
CALIBRATION CO
CAL ZERO
Cal zero 0 ppm
<ESC> exit/cancel
<ENTER> confirm