First dew point transmitter with simple, windows-based configuration and calibration software
Save time and money on installation, operation and servicing.

In the past, sensor transmitter modules have largely been regarded by manufacturers and by users as "black box" systems that give a simple 4-20mA output of the desired measurement parameter, for example temperature, pressure or humidity. Michell Instruments has recognised the benefits for end users and indeed for its distributors and independent calibration houses in having a more intelligent solution, at low cost, that allows key operating parameters and even the dew-point calibration to be adjusted easily and safely by use of a simple computer interface.

The new generation Easidew Transmitter is a micro-controller driven instrument that is configured to give either an analogue 4-20mA or bi-directional digital output. For simple process monitoring applications, the user-configurable mA output can be set to any part of the instrument's -100 to +20 oC dew point measurement range, as can transmitter fault, under-range and over-range alarm condition signals. In the digital mode, this transmitter gives data output as either an ASCII string, readable by any standard computer pr PLC system, or a proprietary mNET digital protocol to interface with Michell's Cermet II Hygrometer system.

The key benefit of the new generation transmitter is that it is shipped with easy to use configuration software for WindowsTM operation that allows the user to set the output range, fault conditions and to set various other operating parameters. With suitable password authority it is possible to re-program the transmitter's calibration table without the need for any sophisticated external equipment. Provided the actual dew point is accurately known, this condition can be programmed into the transmitter memory along with the sensor frequency value, to over-write the factory calibration. This allows, for the first time in such a dew-point transmitter, an end user or calibration laboratory to easily and safely re-calibrate a low cost impedance-type dew-point transmitter without the need to modify electronic circuitry or adjust potentiometers.

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