Need help?Do you have a question about the Extech Instruments RH490 and is the answer not in the manual?
General| Brand | Extech Instruments |
|---|---|
| Model | RH490 |
| Category | Thermometer |
| Language | English |
Welcome message and overview of the Extech RH490 Precision Hygro-Thermometer's features.
Details the terms and conditions of the one-year limited warranty for the instrument.
Identifies the device's buttons for operation and the integrated humidity/temperature sensor.
Explains the various readings and indicators shown on the device's LCD screen.
Instructions on how to turn the Extech RH490 meter on and off.
Guide for selecting and performing %RH and Mixing Ratio measurements.
Steps to select and display Dew Point and Wet Bulb temperatures.
How to select and display temperature in °F or °C.
Instructions for freezing and releasing displayed readings.
Using MIN/MAX modes and activating the LCD backlight.
Explanation of the auto power off feature and how to disable it.
Recommendations for cleaning and storing the hygro-thermometer.
Procedure for replacing the 9 Volt battery when it is low.
Detailed range, resolution, and accuracy for all measurement functions.
Information on calibration services, support, and website resources.
To Next Page