ROTRONIC XB OEM - Manual (Page 24)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 24 of 27
© 2008; Rotronic AG E-M-XB-V1_10
Environmental limits XB2 XB3
Storage and transit
-50…+70 °C
0…100 %RH, non condensing
Operating limits at electronics -40 … +85 °C, 0…100 %RH, non condensing
Temperature limits at probe -100…+200 °C
Maximum humidity at sensor
100 %RH up to 80 °C (176 °F)
75 %RH at 100 °C (212 °F)
45 %RH at 125 °C (260 °F)
15 %RH at 150 °C (302 °F)
Maximum air velocity at probe 40 m/s (7,870 ft /min) – depends on dust filter type
Critical environments Humidity sensor: as per DV04-14.0803.02 - Critical chemicals
10.2 Dew point accuracy
The XB transmitter can be configured to calculate either the dew point or frost point based on the
measurement of relative humidity and temperature. The accuracy of this conversion varies, depending on the
humidity and temperature conditions as shown in the graph below:
Example: at a temperature of 20 ˚C, a dew point value of -37 ˚C is measured with an accuracy of
± 1.0 ˚C or better.