Siemens FIDAMAT 6, Operating Instructions Manual, Page: 82 / 202

Functions
8.3 Calibration
FIDAMAT 6
80
Operating Instructions, 01/2019, A5E00222135-04
8.3.2 Zero calibration (function 20)
Figure 8-3 Zero calibration
Note
For calibration of device version 7MB2421-xDA1x-1AAx–Y37, only oxygen-free gases are
permitted to be used.
In order to calibrate the zero point, the device must be in "Measuring" operating state. If this
is not the case, calibration is not possible. The display will show the message
"analyzer is
not measuring"
.
The zero calibration is performed simultaneously for all measuring ranges, even when the
span of the measuring ranges is calibrated individually.
After call of function 20, the internal zero gas valve is opened.
Only initiate calibration when the measured value (actual value) has stabilized after feeding
the zero gas. Otherwise, the calibration may be imprecise.
If there is a lot of noise, increase the time constant before calibrating (function 50).
See also
Electric time constants (function 50) (Page 94)
8.3.3 Span calibration (function 21)
After call up of function 21, the internal calibration gas valve is opened.
Note
For calibration of device version 7MB2421-xDA1x-1AAx–Y37, only oxygen-free gases are
permitted to be used.