Related Manuals for Vaisala Humicap HMW60U
Summary of Contents for Vaisala Humicap HMW60U
- Page 1 USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Transmitters HMW60U/Y U302EN12...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...
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Page 3: Table Of Contents
HMW60U/Y Transmitters U302en-1.1 Operating Manual Contents PRODUCT DESCRIPTION ....................1 TO BE NOTED WHEN MEASURING HUMIDITY ..............2 INSTALLATION........................3 Selecting the place of installation ................3 Mounting ........................3 Electrical connections..................... 4 CALIBRATION ........................5 MAINTENANCE........................6 Replacing the HUMICAP 180 sensor and the filter ..........6 TECHNICAL DATA....................... - Page 4 HMW60U/Y Transmitters Operating Manual U302en-1.1 This page intentionally left blank. 2000-08-23...
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Page 5: Product Description
HMW60U/Y Transmitters U302en-1.1 Operating Manual PRODUCT DESCRIPTION The HMW60 transmitters are wall mounted truly two-wire transmitters for the measurement of humidity (HMW60U) and for the measurement of humidity and temperature (HMW60Y). The HMW60U/Y transmitters can be mounted directly on the wall. Thye are easy to install and maintain. -
Page 6: To Be Noted When Measuring Humidity
HMW60U/Y Transmitters Operating Manual U302en-1.1 TO BE NOTED WHEN MEASURING HUMIDITY In the measurement of humidity and especially in calibration, it is essential that the temperature equilibrium is reached. Even a slight difference in the temperature between the measured object and the sensor causes an error. For example, at +20 C (+ 68 F) and 50 %RH, a temperature difference of +1 C between the measured object and the sensor causes an error of +3 %RH. -
Page 7: Installation
HMW60U/Y Transmitters U302en-1.1 Operating Manual INSTALLATION Selecting the place of installation Select a place that gives a true picture of the environment or process and is as clean as possible. Air should circulate freely around the sensor. A rapid air flow is recommended as it ensures the same temperature for the ambient air and the sensor head. -
Page 8: Electrical Connections
HMW60U/Y Transmitters Operating Manual U302en-1.1 Electrical connections Figure 3.3 shows the electrical connections. Note the UP sign which shows the correct mounting position. T TEST RH TEST T GAIN T OFFSET OFFSET GAIN (dry) (wet) HUMICAP sensor sensor Figure 3.3 Electrical connections 2000-08-23... -
Page 9: Calibration
HMW60U/Y Transmitters U302en-1.1 Operating Manual CALIBRATION The accuracy is recommended to be checked at least once a year; the interval depends on the operating conditions and the required accuracy of the measurement. The transmitter calibration can be conveniently checked with the HMI41 indicator equipped with an appropriate probe and optional calibration cable. -
Page 10: Maintenance
HMW60U/Y Transmitters Operating Manual U302en-1.1 MAINTENANCE Replacing the HUMICAP 180 sensor and the filter Remove the damaged sensor and insert a new one. Handle the sensor by the plastic socket. DO NOT TOUCH THE SENSOR PLATE. Recalibrate the transmitter. 2000-08-23... -
Page 11: Technical Data
HMW60U/Y Transmitters U302en-1.1 Operating Manual TECHNICAL DATA Relative humidity Measurement range 0...95 %RH (output signal corresponds to 0...100 %RH) Accuracy at +20 C: 1 0 0 % R H Temperature dependence: - 1 0 6 0 ° C -0.5 -1.0 Response time (90%) at 20 C in still air 15 s... -
Page 12: General
ENV50204:1995 criteria A (*additional test) GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product under normal operating conditions for one year from the date of delivery. Exceptional operating conditions, damage due to careless handling or misapplication will void the guarantee. - Page 14 www.vaisala.com...