Download HygroGen2 - Rotronic USA

E-M-HG2-S-V2.0
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature generator:
Instruction Manual
Appendix
Document title
Caution:
Instruction Manual for Software
Version 2.0.x
Document Type
Page
38 of 55
When tightening or releasing the Swagelok connectors do not apply torque to the
nut/caps without using a spanner on the connector body to counteract it. Finger tighten
and then apply a quarter turn with a spanner.
Replace the blanking caps when not using the sample loop.
Figure 34: HygroGen2/Chilled Mirror Set
If the chilled mirror instrument is being used in conjunction with a thermometer (in order to
calculate relative humidity), the temperature probe should be positioned in the chamber. Care
should be taken to ensure that insertion depth and stem conduction effects do not induce
measurement errors.
A typical HygroGen2/Chilled Mirror set up is shown; note the heated sample lines to the rear.
Set the flow rate through the sample loop according the mirror instrument manufacturer‘s
specifications. A lower flow rate will improve stability criteria but may influence measurement
response time.
A2: Temperature Control
Temperature control within the HygroGen2 is performed by a fast response PT100 thermometer
which is continuously referenced against the HygroClip control probe. The chamber is not
considered stable (as indicated by the control indicator being coloured green) unless the reported
temperature values are within the resolution of the control HygroClip.
If a replacement HygroClip reference is put into the HygroGen2, and it gives a significantly different
temperature reading, it may take a while - roughly 20 minutes for every 0.1°C discrepancy - the first
time stability control is engaged, as the self-adjustment algorithm runs.
© 2012; Rotronic AG
E-M-HG2-S-V2.0