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Related Manuals for Extech Instruments RH490
Summary of Contents for Extech Instruments RH490
- Page 1 User's Guide Precision Hygro-Thermometer Model RH490...
- Page 2 A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to...
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Page 3: Display Description
%RH, GPP, g/Kg, Backlight button Note: The battery compartment is located on the rear of the instrument Display Description Relative Humidity % Dew Point Wet Bulb °C/°F Temp/WB/DP Display Maximum Minimum Low Battery Hold RH% Display Auto Off Grains per pound RH490 V2.0 12/06... - Page 4 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 V2.0 12/06...
- Page 5 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 V2.0 12/06...
- Page 6 “ battery symbol will appear on the LCD. Replace the 9 Volt battery by removing the Philips head screw holding the rear battery compartment cover to access the battery compartment. Ensure that the compartment cover is securely fastened when finished. RH490 V2.0 12/06...
- Page 7 Dimensions / Weight 7.8 x 1.7 x 1.3” (200 x 45 x 33mm); 7 oz. (200g) Calibration and Repair Services Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for most products. Call the Customer Service Department for information on calibration services available for this product.
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