E30.0.0X.6C-11
Operating Manual GRA0420VO / GRA010VO
page 10 of 12
Taste2
Taste1
Taste3
6 Offset- and slope-adjustment
The offset and slope-adjustment function can be used for compensating the tolerance of the used sensor,
resp. for vernier adjustment of the used transducer / transmitter.
Please note:
The storage of a configuration value will be occur by switching to the next configuration value
(via button 1).
When configuration is active and no button is pressed for more than 60 seconds the configu-
ration will be cancelled. Stored changes will not be lost!
Hint:
The buttons 2 and 3 are featured with a ‘roll-function‘. When
pressing the button once the value will be raised (button 2) by
one or lowered (button 3) by one.
When holding the button pressed for longer than 1 second the
value starts counting up or down, the counting speed will be
raised after a short period of time
- Turn on the device and wait after it finished its built-in seg-
ment test.
- Press button 3 > 2 seconds
The device will display “
OFFS
“ (Offset).
- Use button 2 and button 3 for setting the desired zero point offset-value.
The input of the offset value are in digit.
The value that had been set will be subtracted from the measured value.
(see below for further information)
-
Press button 1 to validate your selection. The display shows “
OFFS
“ again.
-
When pressing button 1 again, the device will display “
SCAL
“. (scale = slope)
- Use button 2 and button 3 to select the desired slope-adjustment.
The slope adjustment will be entered in %. The value displayed can be calculated like this:
Display = (measured value
– offset – di.Lo) * (1 + slope adjustment [% / 100] ) + di.Lo
Example: The setting is 2.00 => the slope has risen 2.00% => slope = 102%.
When measuring a value of 1000 (without slope-adjustment) the device would display 1020 (with slope
adjustment of 102%)
- Press button 1 to validate the selection of the slope-
adjustment. The display shows “
SCAL
“ again.
Now you finished the offset and slope adjustment of your device.
Press button 1 to finish the adjustment and to switch over to display the measuring value.
Examples for offset- and slope-adjustment:
Example: Connecting of a pressure-transducer
The device displays the following values (without offset- or slope-adjustment): 0.08 at 0.00 bar and 20.02 at 20.00 bar
Therefore you calculated: zero point: 0.08
slope:
20.02
– 0.08 = 19.94
deviation:
0.06
(= target-slope
– actual-slope = 20.00 - 19.94)
You have to set:
offset =
0.08
(= zero point-deviation)
scale =
0.30
(= deviation / actual-slope = 0.06 / 19.94 = 0.0030 = 0.30% )
7 Min-/max-value storage
The device features a minimum/maximum-value storage. In this storage the highest and lowest performance
data is saved.
Calling of the minimum-value
press button 3 shortly
the device will display “Lo“ briefly, after that
the min-value is displayed for about 2 sec.
Calling of the maximum-value press button 2 shortly
the device will display “Hi“ briefly, after that
the max-value is displayed for about 2 sec.
Erasing of the min/max values press button 2 and 3 for 2 sec.
The device will display “CLr“ briefly, after
that the min/max-values are set to the cur-
rent displayed value.
