Manual

MP 601A Humidity Probe INSTRUCTION MANUAL

CONTENTS DESCRIPTION ........................................................................................................................ 3 OPERATION............................................................................................................................ 3 WIRING................................................................................................................................... 5 INSTALLATION ..................................................................................................................... 7 MAINTENANCE..................................................................................................................... 7 CALIBRATION BASICS........................................................................................................ 8 CALIBRATION PROCEDURE............................................................................................... 9 SPECIFICATIONS................................................................................................................. 11

PLEASE, READ THIS FIRST • Check the product for any physical damage that may haveoccurred during shipment. We carefully pack and routinely insure all shipments. If any damage has occurred, it is your responsibility to file a claim with the carrier, prior to returning the damaged product. Please note that our warranty does not cover damage during shipment. • Prior to installation, get fully familiarized with important information provided in this manual such as: supply voltage,electrical connections, adjustments, operating limits. A label located on the barrel of the probe provides the main technical data. • Do not unnecessarily remove the sensor protection (slotted cap or dust filter) from the probe. Both sensors (humidity and temperature) can be mechanically damaged by careless removal of the protection. The ROTRONIC HYGROMER humidity sensor looks like a small white papertag. Do not remove from the probe!

Each ROTRONIC instrument is carefully checked before shipment. If you have any question or problem, please call our service department at 631/427-3898 and press 5 (or ask for extension 21).

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_____________ DESCRIPTION The MP601A is an OEM humidity probe designed primarily for manufacturers ofmeteorological systems. Operation from a DC voltage and low power consumption make the MP601A particularly suitable for integration with data acquisition systems that operate at remote locations. The probe provides a linear 0..1V output signal that corresponds to 0..100%RH. Energizing of the probe is required for only 0.25 seconds during each measurement. Use of the HYGROMER C94 humidity sensorresults in exceptional resistance to contaminants. The MP601A can be used over long periods of time without any maintenance or recalibration. The HYGROMER C94 sensor maintains its accuracy over the full range of humidity, even at conditions close to condensation. The MP601A features electronic temperature compensation of the humidity sensor. The probe is equipped with an NTC temperature sensor thatis used exclusively to provide data to the temperature compensation circuit. Separate power and signal grounds permit use of a long length of cable without loss of signal accuracy. The sensor bulkhead of the MP601A has two spare pins that can be used to attach a temperature sensor such as a thermistor or an RTD (2-, 3- or 4-wire connection). OPERATION

1. Power Supply The MP601A accepts anunregulated supply voltage between 4.8 and 30.0 VDC. The maximum current consumption is 2.5 mA. The MP601A does not have to be continuously energized. Measurements require that the probe be energized for 0.25 seconds after which the power can be turned off to conserve energy.

2. Output Signal The MP601A provides one linearized voltage output signal corresponding to relative humidity: 0...1.0 VDC =...