Section 7
Model 601/601P/602/602P/603 NDIR Analyzer
California Analytical Model 600_NDIR_Series_v10.0 CE
Operators Manual
Page 36 of 86
7.4. F4
Calibrations
F4 from the Main Menu activates the Calibrations screen. Calibrations may be automatic or
manual. Deviations can also be displayed. Calibration values can be reset to default values
and the range to be calibrated can be changed.
Figure 7-8 Calibration Screen
7.4.1.
F1 Automatic Calibration
From the Calibrations screen, F1 starts automatic calibration. If auto range is selected, the
actual range in use will be calibrated. Auto calibration works as follows: First, zero gas is
purged a certain time, called purge-time. Then the measurement begins. The measured
value must be a minimum-time, called measuring-time, and within an upper and a lower
limit to be saved as new offset value. The maximum length of measuring time is 9
seconds. If the measured value was constant during calibration time, it is checked to
determine if this value deviates from the preceding value. If the deviations are too large, a
warning "Deviation error!” appears and the user can choose if the new value is saved or
not. At last, the zero gas is flowed a further time, verifying time, so it can be checked if the
signal is still constant. All of these times can be changed. After zero gas calibration, the
same happens with span gas. During auto calibration, "Calibration in progress” is
displayed. It also shows which gas is flowing and which time runs. When auto calibration
has finished it is displayed. If the span value of the selected range is 0 (see section 5.6.1),
then it will not be calibrated. If one range is calibrated and the span value for the lower
ranges is zero, calibration parameters will be copied to this range. To calibrate all ranges
with the same span gas, you must enter the gas concentration in the Span Gas Calibration
screen for ALL RANGES. You must also calibrate each range. Offsets and scalors are
NOT copied to other ranges.
Figure 7-9 Auto Calibration Screen
Summary of Contents for 600-NDIR
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