
RTD Input
Thermistor
Input
Resistance
Input
3... INTERFACE MODULES
MLIM-4; RTD INPUT APPLICATION
The RTD function of the
♦100 or 1000 ohm @ 0’ C
♦European (0.0385) or American (0.0392) alpha coefficient curve
♦2, 3, or
The actual temperature is calculated from the resistance and can be output in either degrees C or F. Two input temperature ranges are provided for maximizing span and ultimate resolution of the readings. The RTD element resistance is measured using a constant current ratiometric technique which provides excellent accuracy and stability over time and temperature.
Refer to the Excitation Current Table for current levels utilized in the excitation of the RTD elements.
MLIM-4; THERMISTOR INPUT APPLICATION
The Thermistor function of the
The actual temperature is calculated from the resistance and can be output in either degrees C or F. Four input temperature ranges are provided for maximizing span and ultimate resolution of the readings. The Thermistor element resistance is measured using a constant current ratiometric technique which provides excellent stability over time and temperature. Due to the high resistance vs temperature ratio, only
Refer to the Excitation Current Table for current levels utilized in the excitation of the Thermistor element under test.
MLIM-4; RESISTANCE INPUT APPLICATION
The Resistance function of the
Twelve input resistance ranges are provided for maximizing span and ultimate resolution of the readings. The resistance is measured using a constant current ratiometric technique which provides excellent stability over time and temperature.
Refer to the Excitation Current Table for current levels utilized in the excitation of the resistance elements being measured.
MLIM-4; INPUT SIGNAL CONNECTION METHODS:
For all three signal types, RTD, thermistor, and resistance, a ratiometric resistance measurement technique is used. In the case of the RTD and thermistor measurements, a software conversion is then used to convert this resistance into temperature.
In measuring the resistance of a distant element with a conventional
USING THE |