Deltabar FMD71, FMD72 Commissioning
Endress+Hauser 61
Description
5 Once all the points have been entered in the
table, select the "Activate table" option via the
"Lin. mode (037)" parameter.
Menu path: Setup → Extended setup →
Linearization → Lin. mode
6 Result:
Result: The measured value after linearization
is displayed.
• Error message F510 "Linearization" and alarm current as long as the table is being
entered and until the table is activated.
• The lower range value (= 4mA) is defined by the smallest point in the table.
The upper range value (= 20mA) is defined by the greatest point in the table.
• Using the parameters "Set LRV" and "Set URV", you can change the allocation of the
volume/mass values to the current values.
9.12 Configuring pressure measurement
9.12.1 Calibration without reference pressure (dry calibration)
Example:
In this example, a device with a 400 mbar (6 psi) sensor module is configured for the 0 to
+300 mbar (4.4 psi) measuring range, i.e. the 4 mA value and the 20 mA value are
assigned 0 mbar and 300 mbar (4.4 psi) respectively.
Prerequisite:
This is a theoretical calibration, i.e. the pressure values for the lower and upper range are
known. It is not necessary to apply pressure.
Due to the orientation of the device, there may be pressure shifts in the measured
value, i.e. the measured value is not zero in a pressureless condition. For information
on how to perform position adjustment, see "Position adjustment" section → 47.
Description
1 Select the "Pressure" measuring mode via the
"Measuring mode (005)" parameter.
Menu path: Setup → Measuring mode
A0017671
A See table, step 3.
B See table, step 4.
i Current value
p Pressure
2 Select a pressure engineering unit via the
"Press eng. unit (125)" parameter, here "mbar"
for example.
Menu path: Setup → Press. eng. unit
3 Select "Set LRV (013)" parameter.
Menu path: Setup → Set LRV
Enter and confirm the value (here 0 mbar (0
psi)) for the "Set LRV" parameter. This pressure
value is assigned to the lower current value (4
mA).
4 Select the "Set URV (014)" parameter.
Menu path: Setup → Set URV
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