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two-point calibration.
The zero calibration refers to the steps as follow: the sensor feedback is a stable
value or fluctuates in a small range when inlet the clean gas or nitrogen gas without
the measured gas and other interfering gas, and then record the value as the internal
parameter. We suggest users don’t operate the zero point calibration themselves and
should seek the professional persons to operate this step when they calibrate and
maintenance the instrument, because the measure conditions of zero point calibration
are strict, time to spent is long and the value is relatively stable after once zero
calibration.
Figure 3-29 Select INST_CAL Figure 3-30 the main menu of calibration
Figure 3-31 Open calibration lock function
Single point calibration
When users start to operate the single point calibration, the instrument shall
complete the two-point calibration (check the calibration parameter value as shown in
Figure 3-22). Select the
ONE_CAL
and press the confirm key to enter the single point
calibration interface as shown in Figure 3-32 after opening the calibration lock
function. The standard gas display refers to the inlet SF6 gas concentration value (unit:
ppm), the measuring value display refers to the real-time measuring value. Press the
confirm key to adjust the measuring value according to difference between the value
of standard gas and the measuring value, in order to make the measure more accurate
in the near range of standard gas. The adjusted value can be queried (as the downmost
