WIKA A-IAI-1 Betriebsanleitung Seite 20

6. Commissioning, operation
Parameters Values
Key 1
ScAL
EN
Example for offset and slope correction
Connection of a pressure transmitter
The instrument display without offset and slope correction is as follows:
at 0 bar = 0.08, at 20 bar = 20.02
From this is calculated:
Zero point:
Slope:
Deviation:
Therefore the following should be set:
Offset =
Scale =
Min/Max value memory
The instrument has a Min/Max value memory. In this are stored the lowest
and the highest diplayed values. The Min/Max value memory is a volatile
memory, meaning the stored values are lost when the power is interrupted.
To recall Min
value:
To recall Max
value:
To delete
the Min/Max
values:
20
Description
Keys 2 and 3
Slope (scale)
-5.00 ... 5.00 The input of the slope correction factor is made
in %. The displayed value is calculated as per the
following equation:
Display = (measured value - Offset - di.Lo) * (1 +
slope correction [% / 100] ) + di.Lo
0.08
20.02 – 0.08 = 19.94
0.06 = set slope - actual slope = 20.00 – 19.94
0.08 = zero error
0.30 = deviation / actual slope = 0.06 /19.94 = 0.0030 = 0.30 %
Key
Press key 3 briefly
Press key 2 briefly
Press keys 2 and
3 simultaneously
for 2 s.
WIKA operating instructions attachable indicator model A-IAI-1
Display
"Lo" will be displayed briefly and then for
approx. 2 s the Min value will be shown.
"Hi" will be displayed briefly and then for
approx. 2 s the Max value will be shown.
"CLr" will briefly be shown in the display,
the Min/Max value will be reset to the
current display value.