Michell Instruments MDM50-HP, Руководство пользователя

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MDM50 HP Version User’s Manual
Michell Instruments 1
INTRODUCTION
1 INTRODUCTION
The MDM50-HP comprises a fast responding polymer sensor fitted into a sample block
with an integrated filter cartridge, and Swagelok
®
tube fittings on the gas inlet and
outlet. The measured dew point from the sensor is shown on the clear red LED display
on the front panel of the instrument.
The MDM50-HP can be supplied with either °C or °F dew-point measurement units.
A 4-20 mA analog output is provided for connection to a chart recorder, data-logger or
computer system, so dew-point trends can be analyzed over time.
The electronics are housed in a rugged Peli case, providing NEMA 6 protection when the
lid is closed. The case is supplied with a lifetime guarantee.
The MDM50-HP is powered by a rechargeable NiMH battery pack, giving between 12
and 16 hours of measurement time from a full charge. The instrument is delivered
complete with a universal battery charger stored in the lid. It takes 16 hours to fully
charge the battery pack, during which time the instrument can be switched on or
off. The charger is suitable to connect power to the instrument indefinitely, but it is
recommended to allow the battery pack to go through a full charge-discharge cycle at
least once per month.
MDM50-HP polymer moisture sensors are subject to a 9-point calibration, where their
performance is characterized against a fundamental reference hygrometer. This process,
and subsequent quality testing, ensures that all sensors behave optimally before they
are used in the field. Each MDM50-HP is supplied with a calibration certificate traceable
to national standards (NIST) from Michell Instruments' accredited laboratory.