Michell Instruments Hygrosmart HS3, Руководство пользователя

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HygroSmart HS3 User’s Manual
Michell Instruments 23
APPENDIX A
6.2 Probe Adjustment Procedure
The probe electronics provide a functionality which allows the user to apply a 5 point
correction table to the reading received from the sensor module, and adjust the probe
accordingly.
The usage of the adjustment tool in the application software is covered in Section
3.6. This section speci fi cally relates to the method of generating the known conditions
required to make accurate adjustments.
In order to make a valid adjustment, the probe should be exposed to a environment of
stable humidity and temperature, which is also measured by an authoritative traceable
reference instrument. Michell Instruments offers a number of devices suitable for the
purpose, either with or without temperature control.
HygroCal100
The HygroCal100 enables quick and convenient generation of a known humidity condition
at ambient temperatures.
Its chamber allows seven relative humidity probes of various diameters to be installed
into the chamber simultaneously. The probes can be powered directly from the
HygroCal100, and monitored via the intuitive touch screen user interface.
This interface also allows the programming of a calibration pro fi le, so that a series of
humidity values can be generated and held automatically for a set time period. The
readings from all probes under test and the built-in reference can also be logged for
completely autonomous operation. The system is entirely self-contained, and weighs
just 3.2kg (7lbs) (including the battery pack), so is easily portable for making multiple
on-site checks.
OptiCal
For calibration at a variety of temperatures, the OptiCal humidity calibrator provides a
stable and accurate calibration environment over the 10 to 90% RH and +10 to +50°C
(+50 to +122°F) range. The stand-alone, transportable calibrator requires no external
services other than mains power, and features an integrated chilled mirror reference
instrument to enable the operator to perform calibrations that are traceable to national
standards.