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Summary of Contents for Extech Instruments RH490
- Page 1 User's Guide Precision Hygro-Thermometer Model RH490...
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Page 2: Display Description
Introduction Congratulations on your purchase of the Extech RH490 Precision Hygro- Thermometer. This device measures Humidity, Air Temperature, Dew Point temperature, Wet Bulb temperature and Grains of Water Vapor Per Pound of Air. Advanced features include Data Hold, Auto Power Off, and MAX/MIN reading. This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service. - Page 3 4. The GPP or g/Kg measurement appears in the top display. 5. Pressing the “°F/°C/WBT/Dew Point” button toggles the lower display between Temperature (°F), Temperature (°C), Dew Point (°C), Dew Point (°F), Wet Bulb (°C) and Wet Bulb (°F). RH490-EU V2.0 12/06...
- Page 4 Press the ”H MAX MIN” button momentarily to freeze the displayed readings. ”HOLD” will appear on the upper left-hand side of the display. Press the ”H MAX MIN” button three more times to return to normal operation. (Steps through MAX and MIN) RH490-EU V2.0 12/06...
- Page 5 You can hand over your used batteries / accumulators at collection points in your community or wherever batteries / accumulators are sold! Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle RH490-EU V2.0 12/06...
- Page 6 Approx. 24 hours Dimensions / Weight 200 x 45 x 33mm (7.8 x 1.7 x 1.3”); 200g (7 oz.) Copyright © 2009 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form.
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