4-20 and 0-20mA Input Current Configuration
Current Loop (Passive) Option
Current Output (Active) Option
View the analog inputs arrangement
Up on the left in the configuration window, select 4-20mA or 0-20mA according to the sensor's output current range.
Select the option according to the type of sensor:
• Current Loop (Passive) if the sensor is 2-wire with power supply on
the same line of the signal.
• Current Output (Active) if the sensor is 3 or 4-wire with power supply
separate from the signal.
Name
Identification name of the sensor. You can assign the name, for example, of the sensor model, or the type of measured parameter. The name should begin with a letter and can be maximum 12 characters long. The name unequivocally identifies the measurement being input; you cannot assign the same name to multiple measurements.
Unit
Unit of measurement of the quantity detected by the sensor. It should begin with a letter and can be maximum 12 characters long. The unit of measurement should be in agreement with the values of the Equivalent to 4mA (or 0mA) and Equivalent to 20mA parameters.
Channel BIP
It indicates the number of the analog input to which the sensor should be connected. The software automatically assigns the first input free. The number cannot be changed by the user.
Shunt (Shunt resistance value)
The value of the shunt resistance is fixed to 100 ohm.
Equivalent to 4mA or 0mA and Equivalent
to 20mA
To directly record the value of the physical quantity measured by the sensor in the datalogger, you only need to enter the following values in the Equivalent to 4mA (or 0mA) and Equivalent to 20mA fields:
Equivalent to 4mA (or 0mA) = bottom scale of the physical quantity
Equivalent to 20mA = full scale of the physical quantity
The recorded value will use the same unit of measurements of the bottom and full scale values entered. Such unit of measurement should be entered in the Unit field. You should only enter the numeric value, without unit of measurement, in the Equivalent to 4mA (or 0mA) and Equivalent to 20mA fields.
Error messages
If the configuration parameters are not correctly input, you can get the following error messages.
The name and Unit fields are required !
Cause: the identification name or the unit of measurement fields were not filled.
There is just an equivalent Name !
Cause: you previously entered a sensor with the same name. You should change the identification name.
The two Equivalent values must be different !
Cause: the same value has been entered in the Equivalent to 4mA (or 0mA) and Equivalent to 20mA fields.