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| | | Calibration Instruments | | |
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| | | The Importance of Regular Calibration | | |
| | | Calibration Standards Each country will hold its own National Standard for dew point and humidity. This may be a primary standard. Other calibration facilities will have reference instrumentation calibrated against the Primary Standard and use this as their standard. In this approach a pyramid structure is generated. This structure gives confidence in the calibration process as traceability of calibrations is visible. | | |
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| | | The great operation of a hygrometer and indeed any measuring instrument, can only be verified by periodic calibration against a dependable reference system. All hygrometers from Michell Instruments are delivered with a calibration certificate, but this alone will not | | |
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| | | guarantee the measurement performance throughout their life. Exposure to contaminants within the measurement of gas can cause measurement performance errors. To have confidence in the performance of a sensor it must be verified by periodic calibration. | | |
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| | | Calibration Pyramid | | |
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| | | Michell Instruments Calibration Services Michell's UKAS (United Kingdom Accreditation Service) laboratory was established back in 1986 and was the first laboratory in the UK to be accredited for the dew | | |
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| | | point calibraCalibration | laboratory has been maintained and | | of the
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| | | developed over the years and Michell can now offer calibrations over the range -90°C to +90°C dew point | | |
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| | | with a best measurement capability of ±0.15°C dew point. In addition to this Michell can provide traceable calibrations to NIST (National Institute for Standards and Technology - USA). | | |
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| | | The Technology All the calibration systems and industrial generators that Michell Instruments offer generate a gas suitable for calibration of sensors by gas dilution. By the mixing of different volumes of wet and dry gas streams and performing a measurement with a reference instrument a gas of known humidity can be used in the calibration of other humidity sensors. By this method trace moisture or high humidity gas can be generated and traceability of the calibration is achieved through the reference instrument. | | |
| | | Applications | | |
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| | | • Meteorology Laboratories | | |
| | • Calibration Laboratories | | |
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| | | • Industrial Gas Producers | | |
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| | | • Pharmaceutical Companies | | |
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| | | • Humidity Sensor / Instrument | | |
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| | | • Manufacturers | | |
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| | | • ... and many more | | |
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| | | | | | | | | | | Reference | | Test | | | | Sensor | | Sensor | | | | | | | | | | |
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| | | dry flow valve meter | | |
| | | Particulate filter | | |
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| | | Dry Gas In | | |
| | | valve meter wet flow | | |
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| | | Saturator | | |
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| | | MICHELL Instruments | | |
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