ROTRONIC Hygrogen2 - Manual (Page 58)

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 54 of 75
Document title
8.3 HygroGen2 Cleaning
Prior to cleaning, the unit should be disconnected from the electrical mains supply.
External surfaces
The external surfaces of the HygroGen2 may be cleaned with a lint-free cloth dampened with a mild
soap solution. Care must be taken not to allow fluids into any of the apertures on the unit. The fan
inlet filter can be cleaned using a vacuum cleaner to remove any particulates. The filter material is
replaced during servicing.
Chamber
Periodically it is recommended that the internal surfaces of the HygroGen2 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.
Purging internal pipes
Some humidity instruments are used in environments where chemical contaminants may be present.
Should these transfer to the HygroGen2, this may result in drift of the RH control probe, which would
become apparent during calibration. To purge the internal pipe work and chamber of the HygroGen2,
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 HygroGen2 will be absorbed into the GAC.
8.4 Annual Servicing of HygroGen2
The unit does not require routine user maintenance beyond that described in this Section.
For optimum performance, ROTRONIC recommends that the HygroGen2 is serviced every 12 months at an
approved HygroGen2 service centre, details of which can be found in Appendix C2 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.
© 2014; Rotronic AG E-M-HG2-S-V2.1