Temperature Display - Honeywell 2MLF-RD4A User Manual

1. When the ambient temperature is 25 ± 5°C: accuracy is within ±0.2% of the
temperature input range for that sensor.
2. When the ambient temperature is 0 to 55°C: accuracy is within ±0.3% of the
temperature input range for that sensor.
The normal ambient temperature is 25°C. If Pt100 is used as the sensor and the ambient
temperature is normal.
To measure 100°C, the conversion data output range is as given below:
100°C - [{850 - (-200)} x 0.2%] ~ 100°C + [{850 - (-200)} x 0.2%] = 97.9 ~ 102.1 °C

Temperature display

1. The input temperature is converted to digital value to the first decimal place.
Example: If the detected temperature is 123.4°C, its converted digital value will be
saved as 1234 in the internal memory.
2. Temperature can be converted to Celsius or Fahrenheit scale as desired.
Example: If Pt100 sensor is used, the temperature of 100.0°C can be converted to
212.0°F when Fahrenheit scale is used.
Conversion °C to °F,
Conversion °F to °C,
3. Maximum allowable temperature input range is within 10°C higher or lower than
regular temperature input range. However, the precision cannot be guaranteed for
any temperature out of the regular temperature input range.
Maximum temperature input ranges of two sensors are as follows:
a) Pt100: -210.0 – 860.0°C
b) JPt100: -210.0 – 650.0°C
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide
September 2010
9
F = C
+ 32
5
5
( )
C = F − 32
9
Honeywell
2. Specifications
2.3. RTD input module characteristics
27