One of the most important and unique features of the SHAW system is AutoCal (automatic calibration).
The SHAW dewpoint sensor, precisely manufactured to saturate with water vapour at its design maximum. Hence, when exposing the dew point sensor to moisture above its maximum operating range, it will rapidly come into equilibrium and cease responding to any further increase in moisture. This forms the basis of AutoCal (automatic calibration).
Perform routine checks of the sensor by simply exposing it to any atmosphere which is wetter than its operating range (usually room air is sufficient). This involves raising the desiccant chamber and completing the AutoCal process on the instrument. The dewpoint sensor and instrument are synchronised and ready for use. Automatic calibration of SHAW dewpoint instruments allows the user to ensure accuracy between laboratory calibrations by checking the span of the dew point hygrometer and correcting for any deviation.
Complete AutoCal in-situ without the need for any special equipment or skilled personnel. The net results include: reduced downtime, minimal calibration costs and immediate verification of the dewpoint system. It is acceptable to perform AutoCal every two to three months but this should not replace true calibration against a known standard.
Hand-held hygrometers for quick and reliable spot check measurements of dew point and trace moisture content. Incorporating state of the art features and real time data logging.