Promote your assets
19
line as shown in Figure 3-22). At the same time, the instrument provides the single
calibration (calibration in the clean air without the measured gas)at the zero point.
Under the main menu interface (see Figure 3-2, 3-3),press down key to enter the
interface as shown in Figure 3-33 and press confirm key to store the value and correct
the measured value.
Figure 3-22 ONE_CAL interface Figure 3-23Instrument zero setting
Two-point calibration
Select the
TWO_CAL
and press the confirm key to enter the two-point calibration
interface as shown in Figure 3-34 after opening the calibration lock function. The low
point calibration and high point calibration will be introduced as following.
Figure 3-34Two-point calibration
（1）
Low point calibration
The low point calibration adopts the clean gas or nitrogen gas without the
measured gas and other interfering gas as the standard gas. In the status as shown in
Figure 3-34, press the confirm key to enter the interface as shown in Figure 3-35.
Open the gas pump and absorb the clean gas (without the measured gas and other
interfering gas), if the sensor works normally, the sampling value will become stable
(or the value fluctuates in a small range) in a few seconds. At this time, input "0" on
the right of "Gas" and confirm it, if the instrument works normally, the system will
