Siemens FIDAMAT 6, Operating Instructions Manual, Page: 122 / 202

Functions
8.6 Configuration
FIDAMAT 6
120
Operating Instructions, 01/2019, A5E00222135-04
If you previously configured a relay output to "Maintenance request" using function 71, the
device outputs changes of the zero point or span with respect to the last calibration as
"Maintenance request".
Note
In order to be able to use this function, "Total range calibration" (function 23) must be
activated.
With
"Calibration tolerance at zero…"
, you define the maximum deviation in relation to the
smallest span in %.
With
"Calibration tolerance at span ..."
, you define the maximum deviation in relation to the
current span in %.
The calibration tolerance, which can be set from 0 to 99%, refers to the span of the smallest
measuring range in the case of the zero point and to the span of the measuring range in
which the total range calibration is being performed (marked with "■" in function 22) in the
case of the span.
Example
Measuring range 1 5 to 100 ppm THC
Measuring range 2 20 to 200 ppm THC
Smallest span 95 ppm THC
Leading measuring range in which calibration is
being performed
Measuring range 2
Response threshold for zero point 95 ppm THC x 10% = 9.5 ppm THC
Response threshold for span 180 ppm THC x 10% = 18 ppm THC
If the zero/span deviates by more than the configured value compared to the last calibration,
and if "Signal tolerance violation" is activated, the corresponding relay signals a maintenance
request.
See also
Total / single calibration (function 23) (Page 83)