ROTRONIC HF7 - Manual (Page 22)

E-M-HF7-V1_24
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF7 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 22 of 23
Document title
© 2009-2011; Rotronic AG E-M-HF7-V1_24
Conformity with standards HF72 HF73
CE / EMC immunity
EMC Directive 2004/108/EG: EN 61000-6-1: 2001, EN 61000-6-2: 2005
EN 61000-6-3: 2005, EN 61000-6-4: 2001 + A11
Solder type Lead free (RoHS directive)
Fire protection class Corresponds to UL94-HB
FDA / GAMP directives compatible
Environmental limits HF72 HF73
Operating limits at electronics -5 0 … +85 °C, 0…100 %RH, non condensing – valid for survival only
Temperature limits at probe - 100…+150 °C (valid for type N, D and A)
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 HF7 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 2 0 ˚C, a frost point value of -25 ˚C is measured with an accuracy of
± 0.5 ˚C or better.