ROTRONIC HP21 - Manual (Page 13)

E-M-HP21-V1_21
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroPalm HP21 hand-held indicator:
User Guide Instruction Manual
Document Type
Page 13 of 14
Document title
© 2009-2010; Rotronic AG E-M-HP21-V1_21
Conformity with standards HP21
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)
FDA / GAMP directives compatible
Environmental limits HP21
Storage and transit -2 0…+70 °C / 0…100 %RH, non condensing
Operating limits at electronics
- 10….60 °C (limited by LC display)
0…100 %RH, non condensing
Temperature limits at probe Same as electronics
Maximum humidity at probe Same as electronics
Maximum air velocity at probe 20 m/s (3,935 ft /min)
Critical environments Humidity sensor: as per DV04-14.0803.02 - Critical chemicals
7.2 Dew point accuracy
The HP21 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.