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.
