Product specifications

4 CALIBRATION

In order to acquire stable, accurate data, perform calibration when starting measurement and

at regular intervals.

For the APOA-370, normally perform the zero calibration only.

The span calibration should be periodically performed using an ozonizer or the like (generally

by using an ultraviolet lamp). At this time, assay the concentration of ozone in accordance

with the ozone concentration assay specified in JIS B7957.

There are two types of calibration, the auto calibration (AIC) and the manual calibration.

Auto calibration (AIC)

The AIC sequence is executed at the specified time intervals or with the externally inputted

command to perform the zero calibration and span calibration automatically.

Manual calibration

This calibration is performed manually at an arbitrary timing.

There are two methods available for the manual calibration; one uses the calibration gas line,

and the other supplies the calibration gas to the measured gas line.

4.1 Calibration-related Screens

This section describes the screens used for the automatic calibration and manual calibration.

4.1.1 CAL. screen

This is the basic screen for calibration.

To display the CAL. screen, press the [CAL.] key on the MEAS. screen (Fig. 5 on page 7).

Fig. 14 CAL. screen

1: MODE

The selected measurement line is displayed.

Press the displayed MODE setting, and the MODE screen will be displayed (see “ 4.1.2

MODE screen ” (page 12)).

1: MODE

2: Span gas concentration value

3: Zero calibration coefficient

4: Span calibration coefficient

5: Function keys