Download Directed Electronics 625 Operating instructions

6 Setup with the integrated display and adjustment unit
→ 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.
Measurement loop - Input Because VEGAMET 625 has two inputs, the measurement loops
must be assigned to the inputs. After the addresses of the HART sensors 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 "Sensor 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 options PV (Primary Value) and SV (Secondary Value) will be available.
Prerequisite is that the HART commands 0, 1, 3 and 15 are supported. This information and which measured values should be transmitted is stated in the operating instructions manual of the respective
sensor manufacturer.
Meas. loop - Parameter
The measured variable defines the applicaton of the measurement
loop, the following settings are available depending on the connected
sensor:
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•
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Level
Process pressure
Temperature
Difference (only with measurement loop 3)
Interface
Universal (for sensors of other manufacturers)
28970-EN-150129
The third measurement loop is always a differential measurement
loop calculating the difference 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 several times, because they are specifically required for each measurement loop.
Meas. loop - Adjustment
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 %).
VEGAMET 625 • Double channel HART
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