Operating instructions

21
6 Setup with the integrated display and adjustment unit
VEGAMET 625 • Double channel HART
28970-EN-150129
→
Carry out your settings via the respective keys and save with
[OK]. Further information is available in the supplementary
instructionsmanual"RS232/Ethernet connection"andtheonline
help of the respective DTM.
Because VEGAMET 625 has two inputs, the measurement loops
must be assigned to the inputs. After the addresses of the HART sen-
sors are assigned, a list of the existing sensors can be prepared and
displayed via the sensor search. Now you can assign the requested
sensor to each measurement loop.
Fortransmission,VEGAMET625mustbeinformedwhich"Sen-
sor value
"shouldbeusedforfurtherprocessing.Dependingonthe
sensor type this can be distance, pressure, interface or temperature.
When HART sensors of other manufacturers are connected, the op-
tions PV (Primary Value) and SV (Secondary Value) will be available.
Prerequisite is that the HART commands 0, 1, 3 and 15 are support-
ed. This information and which measured values should be transmit-
ted is stated in the operating instructions manual of the respective
sensor manufacturer.
Themeasuredvariabledenestheapplicatonofthemeasurement
loop, the following settings are available depending on the connected
sensor:
•
Level
•
Process pressure
•
Temperature
•
Dierence(onlywithmeasurementloop3)
•
Interface
•
Universal (for sensors of other manufacturers)
Thethirdmeasurementloopisalwaysadierentialmeasurement
loopcalculatingthedierenceofthevaluesofmeasurementloops1
and 2 (optionally measurement loop 1-2 or 2-1).
Information:
Keep in mind that some settings must be carried out individually sev-
eraltimes,becausetheyarespecicallyrequiredforeachmeasure-
ment loop.
Through the adjustment the input value of the connected sensor is
converted into a percentage value. This conversion step allows any
input value range to be depicted in a relative range (0 % up to 100 %).
Measurement loop - Input
Meas. loop - Parameter
Meas. loop - Adjustment