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User's Guide
Digital Psychrometer
Model RH390
MAX
MIN
°F•°C•WBT
Dew Point
Introduction
Congratulations on your purchase of the Extech RH390 Digital Psychrometer.
This device measures Humidity, Air Temperature, Dew Point temperature and
Wet Bulb temperature. Advanced features include Data Hold, Auto Power Off,
and MAX/MIN reading. Careful use of this meter will provide years of reliable
service.
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Summary of Contents for Extech Instruments RH390
- Page 1 °F•°C•WBT Dew Point Introduction Congratulations on your purchase of the Extech RH390 Digital Psychrometer. This device measures Humidity, Air Temperature, Dew Point temperature and Wet Bulb temperature. Advanced features include Data Hold, Auto Power Off, and MAX/MIN reading. Careful use of this meter will provide years of reliable...
- Page 2 Dimensions / Weight 7.8 x 1.7 x 1.3” (200 x 45 x 33mm); 7 oz. (200g) Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables).
- Page 3 Note: The battery compartment is located on the rear of the instrument Display Description Relative Humidity % Dew Point Wet Bulb MAX MIN °C/°F Temp/WB/DP Display Maximum Minimum Low Battery °C °F Hold Dewpoint RH% Display WetBulb Auto Off RH390 V2.0 03/05...
- Page 4 Dew Point (°F), Wet Bulb (°C) and Wet Bulb (°F). Dew Point measurements 1. To select the Dew Point measurement, press the °F/°C/WBT/Dew Point button until DEWPOINT (°F or °C) appears in the lower right. 2. Dew Point temperature is now displayed. °C °F Dewpoint RH390 V2.0 03/05...
- Page 5 Data Hold Press the hold button ( momentarily to freeze the displayed readings.”HOLD” will appear on the upper left-hand side of the display. Press the hold button ( ) again to return to normal operation. °C °F WetBulb RH390 V2.0 03/05...
- Page 6 ) while powering on. The symbol will not appear when auto power off has been disabled. °C °F The meter will revert to the default auto-off mode when powered off. RH390 V2.0 03/05...
- Page 7 For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Copyright © 2005 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form.
- Page 8 This datasheet has been downloaded from: www.EEworld.com.cn Free Download Daily Updated Database 100% Free Datasheet Search Site 100% Free IC Replacement Search Site Convenient Electronic Dictionary Fast Search System www.EEworld.com.cn All Datasheets Cannot Be Modified Without Permission Copyright © Each Manufacturing Company...
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