ROTRONIC HF62 - Manual (Page 23)

E-M-HF62-V1_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroFlex HF62 Humidity Temperature
Transmitters: User Guide
Document title
Page 23 of 27
© 2008; Rotronic AG E-M-HF62-V1_11
Environmental limits HF62
Storage and transit -50…+70 °C / -20...+70 °C (models with display), 0…100 %RH, non condensing
Operating limits at electronics -40 … +60 °C / -10….60 °C (models with display), 0…100 %RH, non condensing
Temperature limits at probe -100…+150 °C (valid for type D and type 2 – cable probe)
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 HF62 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 frost point value of -25 ˚C is measured with an accuracy of
± 0.5 ˚C or better.