JUMO 701550 di 308 - Digital Indicator Operating Manual - Manual (Page 39)

39
7 Configuration
Customised
fine adjust-
ment
The customised fine adjustment is used to correct the
values displayed by the instrument. This may be
necessary, for example, after a system validation, if
the displayed values no longer coincide with the
actual values at the point where the measurement is
taken.
Using a reference measuring instrument, two
measured values are determined which should be as
far apart as possible (start value, end value). Ensure
that the measuring conditions are stable. Enter the
reference value found as the start value (FINEADJB)
or end value (FINEADJE) on the instrument to be
tuned.
Example
The temperature inside an oven is measured with an
RTD temperature probe and displayed on an
instrument. The reading on the instrument deviates
from the actual temperature as a result of the sensor
temperature drifting. At 20°C the instrument reads
15°C, at 80°C it shows 70°C (exaggerated example
for better understanding).
20°C / 80°C
Oven
20°C / 80°C
15°C / 70°C Display on the instrument
Reference measuring instrument
Sensor