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Introduction
Congratulations on your purchase of the Extech RH401 Digital Psychrometer + InfraRed
Thermometer. This device measures Humidity, Air Temperature, Dew Point and Wet Bulb.
Advanced features include Infrared Non-Contact Surface Temperature Measurement, Data Hold and
programmable Auto Power Off, and an RS-232 interface for capturing readings to a PC using
optional 407752 software. The retractable probe protects the sensors when the meter is not in use.
Careful use of this meter will provide years of reliable service.
Meter Description
1.
Emissivity adjust indicator
2.
Laser pointer on indicator
3.
Low Battery indicator
4.
IR Surface Temperature button
5.
ON/OFF/Setup button
6.
Back Light button
7.
Laser/Down button
8.
°F/°C/Up button
9.
Dew Point/Wet Bulb button
10. % Humidity display
11. Air Temperature, Dew Point or Wet Bulb display
12. IR Surface Temperature display
13. Extended probe with Humidity &
Air Temperature Sensors
14. PC interface port
15. AC adaptor jack
Note: The battery compartment is located on the rear of the instrument
nd Quality Products Online at:
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GlobalTestSupply
www.
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DP
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RH401-en-GB_ V1.7 1/17
.com
sales@GlobalTestSupply.co
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