Michell Instruments HygroCal100 User Manual

HygroCal100 User’s Manual
Michell Instruments
33
MAINTENANCE
4.4 Calibration Correction
The HygroCal100 is provided with an intuitive calibration correction system which is used
to calibrate and adjust the internal HS3 control sensor against an external reference
device.
If a traceable reference is available, it is advisable to pass the traceability of this onto
the control sensor of the HygroCal100 at regular intervals. The process allows calibration
at 3, 5 or 9 preset points, which are:
Preset RH Points
Total time to
complete
3 point 30%, 50%, 70% 45mins
5 point 20%, 30%, 50%, 70%, 80% 1hr 15mins
9 point 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% 2hr 15mins
Table 11 Calibration Correction
Select System Settings ->
Correct. This will display a prompt to enter a password
to proceed - the required code is
7316. Once this has been entered, the Calibration
Correction Setup Screen will be displayed. This screen shows a number of checks which
should be carried out before proceeding.
NOTE: If the desiccant is exhausted, or the saturator is not suffi ciently fi lled,
then this can result in an invalid correction being applied to the control sensor.
NOTE: Ensure that the temperature of the environment you intend to operate
in is stable before proceeding.
1
3
:
0
4
Calibration Correction
- Check saturator
- Check desiccant
- Is external reference installed?
Calibration Points
TRANSFERTEMP
3
DEFAULT
START
Figure 33 Calibration Correction Setup Screen
The Calibration Correction Setup Screen allows selection of the desired number
of calibration points. Once this choice is made, touch the
Start button to begin the
calibration.
Previous calibration corrections can be downloaded to USB memory by touching the
Transfer icon, and will be stored in CSV format as per the log data fi les (see Section
3.9.2 for further information).

Michell Instruments HygroCal100 Specifications

General

Brand	Michell Instruments
Model	HygroCal100
Category	Laboratory Equipment
Language	English