|
<< Click to Display Table of Contents >> Navigation: Humidity & Temperature Devices > Generator > HC100A > Introduction |
The HygroCal100 Advanced Portable Humidity Validator enables quick and convenient generation of a known humidity condition at ambient temperatures.
The 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 Advanced, and monitored via the intuitive touch screen user interface.
This interface also allows the programming of a calibration profile, 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 Validator operates on a divided flow mixing principle. The main calibration chamber is supplemented by two reservoirs, one of which contains desiccant, the other contains a saturator, which consists of a small quantity of distilled water and a diffuser.
Two pump circulates air through the system, which is directed to the desiccant and saturator reservoir. When flowing through the desiccant, moisture is removed from the air; when flowing through the saturator, moisture is added to almost completely saturate it at the prevailing temperature.
A Rotronic HygroClip2 Advanced control sensor is installed inside the calibration chamber, continually measuring the temperature and relative humidity inside. When a target humidity level is set via the user interface, the control system uses the reading of the HC2A control sensor to determine whether to add humid air or dry air to the chamber in order to reach the desired level. When the reading of the HC2A is equal to that of the target set point, the system alternates between injections of dry and wet air to maintain a constant humidity condition in the chamber.