Instructions

ManualsBrandsDelta Ohm ManualsData LoggersDelta Ohm HD21ABE17 Kit Carbon monoxide data logger, Air pressure data logger, RH data logger, Multi-channel data logger

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4.5.2 CO Calibration

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 (code MINICAN.12A).

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

Place the instrument in a clean air environment (CO concentration is lower than 0.1 ppm outdoor).

Turn the instrument on and wait at least 15 minutes so as to stabilize the measurement. Now press

ENTER and wait the two minutes necessary for calibration without changing the working

conditions.