E-m-hg2-s-v2.1 – ROTRONIC Hygrogen2 User Manual
Page 57
E-M-HG2-S-V2.1
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2: Humidity and Temperature Generator
with AutoCal/AutoCal+, Remote Control and
Range Extensions options.
Instruction Manual
Instruction Manual for Software
Version 2.1
Document Type
Page 53 of 75
Document title
Ensure that the cell is filled with as much desiccant as possible to ensure there are no air gaps.
Remember to replace the foam insert (that fits between the cell cap and the desiccant) before
replacing the cell cap and spring clip. Application of silicone grease on the desiccant cell cap “O” ring
will help ease removal and refitting.
Caution: Do not use dusty desiccants as the dust may be passed into the chamber.
Choice of Desiccant
The HygroGen2 is supplied from the factory filled with molecular sieve desiccant. Molecular sieve is
preferred due to its higher performance in all temperature and humidity conditions and is longer
lasting and can be regenerated through heating. Other desiccants including self-indicating silica gel
and drierite can be used if desired; for further information, please contact
Dusty desiccants should be avoided as particles may be passed into the HygroGen2 chamber. Replace
or regenerate the desiccant whenever the drying performance of the HygroGen2 is deteriorating.
Material Safety Sheets for the desiccants supplied by ROTRONIC are available on request.
Regeneration of Molecular Sieve Desiccant
To regenerate molecular sieve, remove it from the desiccant cell and heat it at 175°C for 3-5 hours in
a dry environment (do not use a gas oven). After heating, allow to cool in a dry or sealed environment.
Performance of the regenerated desiccant can be measured in the HygroGen2 according to the
method described above. Alternatively, replacement new desiccant can be ordered from ROTRONIC.
Please contact your local dealer.
5a) Cell cap
5b) Retaining clip
5c) Cell body
Figure 36: Desiccant Cell
© 2014; Rotronic AG
E-M-HG2-S-V2.1