NTC Thermistors Configuration
View the analog inputs arrangement
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.
Temperature (Unit of measurement of temperature)
Select the desired unit of measurement between: deg C (Celsius degrees), deg F (Fahrenheit degrees) and deg K (Kelvin degrees).
The datalogger calculates the value of the temperature corresponding to the resistance value measured according to the value entered in the BETA field, and directly records the temperature value in the chosen unit of measurement.
Channel UNI
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. The programmable inputs for this type of measurement are
only the single-ended inputs 1, 2, 3 and 4.
Channel Exc (Excitation terminal)
It indicates the number of the terminal E from which the excitation voltage is taken, that is, the terminal on which to connect one side of the reference resistor Rf. The number is assigned automatically and cannot be changed by the user.
VExc (Excitation voltage)
The excitation voltage applied to terminal E. The fixed value is 2500mV.
BETA (Constant of the material)
Enter here the value of the BETA coefficient reported in the NTC sensor specifications.
NTC/Rf Range
It indicates the resistance measurement range of the sensor compared to the value of the reference resistance Rf. The field cannot be set. The measurable resistance values depend only on the value of the reference resistance Rf. The minimum and maximum measurable values are, respectively: NTCmin = Rf / 1000, NTCmax = 100 x Rf.
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.
BETA must be positive !
Cause: the BETA field has not been filled or zero has been entered.