E-M-HG2-S-V1_04
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature
generator: Instruction Manual
Instruction Manual
Document Type
Page
20
of 46
Document title
© 2009-2010; Rotronic AG
20
E-M-HG2-S-V1_04
2.16 HygroGen Internal Cleaning
Prior to cleaning, the unit must be disconnected from the electrical mains supply, as described in Power
Isolation Section 4.2.
Periodically it is recommended that the internal surfaces of the
HygroGen chamber sleeve are inspected and wiped clean of any
visual residues using a lint-free cloth moistened with distilled water.
Care should be taken to avoid mechanical damage to the control
probe and sampling tubes inside the chamber. The HygroClip
control probe may be removed by unscrewing the retaining
aluminium collar in an anti-clockwise direction and carefully pulling
the probe from its locating connector. Replacement requires that
the probe is gently rotated until the connector keys allow the probe
to insert. DO NOT USE ANY MECHANICAL FORCE during removal or
refitting.
Some humidity instruments are used in environments where chemical contaminants may be present.
Should these transfer to the HygroGen, this may result in drift of the RH control probe, so during
calibration of the control probe should large deviations occur, this may be due to external
contamination. If you believe this to be the case, or wish to purge the internal pipe work and chamber of
the HygroGen, replace the desiccant with Granular Activate Charcoal (GAC) and run the unit at 40 °C and
5 %rh for 6 hours. Any volatile compounds within the HygroGen will be absorbed into the GAC.
2.17 HygroGen Servicing
The unit does not require routine user maintenance beyond that described in this Section; in particular
the ‘How to Fill the Water Reservoir’ and ‘How to Change the Desiccant Cell Sections. Should the unit
develop a fault or exhibit errant performance the unit should be switched off, disconnected, labelled as
a potential hazard and the manufacturer or service centre contacted (Section 13).
For optimum performance ROTRONIC recommend that the HygoGen is serviced on an annual basis
(every 12 months) through an approved HygroGen service centre, details of which can be found in
Section 13 of this manual.
Under no circumstance should the unit be opened by personnel unauthorised by the
manufacturer. Doing so will void the manufacturer’s warranty, and expose potentially
dangerous electrical hazards.
