Operation
7.6 Calibration
FIDAMAT 6
72 Operating Instructions, 01/2019, A5E00222135-04
7.6 Calibration
7.6.1 General information on calibration
Note
Calibration is only possible when the device is
in "Measuring" operating state.
Zero point
You calibrate the zero point with function 20. The device displays both the setpoint and
actual value.
Single / total range calibration
Single calibration means that you calibrate each measuring range with a separate calibration
gas. This is recommended when the switching ratio of the spans is greater than 1:10.
With the total range calibration, you only calibrate the leading measuring range (function 22).
The other ranges are "calibrated along" via the switching ratio.
The total range calibration is activated or deactivated using function 23.
Select function 21 and perform the desired calibration. Note that this function can only be
selected if AUTOCAL (function 24) is deactivated. If the total range calibration was activated
previously, all measuring ranges are then calibrated.
If you have selected single calibration (total range calibration deactivated), repeat the
calibration operation for each measuring range individually with the corresponding calibration
gases. (a calibration gas must be entered for every measuring range under function 22!)
Zero and span calibrations
Connect the device to zero gas or calibration gas. In doing so, observe the prescribed input
pressures.
Calibrate the zero point using function 20, and the span using function 21.
7.6.2 Calibration examples
a) Detection of hydrocarbons in air
Measuring range: 0 – 20 ppm C1
Calibration gas: 15 ppm methane in air
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