RH490 Datasheet, PDF (7/7 Pages) Extech Instruments Corporation. – Precision Hygro-Thermometer

Specifications
Function
Range and Resolution
Accuracy
Humidity
0.0 to 10.0%RH
±3%RH
10.0 to 90.0%RH
±2%RH
Temperature
90.0 to 100.0%RH
-22.0 to – 3.9^oF
-30.0 to -19.9^oC
-4.0 to 158.0^oF
-20.0 to 70.0^oC
158.1 to 199.0^oF
70.1 to 100.0^oC
±3%RH
±2.7^oF
±1.5^oC
±1.8^oF
±1^oC
±2.7^oF
±1.5^oC
Wet Bulb
32 to 176°F (0 to 80°C)
Dew Point
Mixing Ratio
-22 to 199°F (-30 to 100°C) _{Calculated from RH and air}
0 to 1120 GPP (grains per pound) ^{temperature measurements}
0 to 160 g/kg (grams per kilogram)
Display
Dual LCD
Response Time:
<30 seconds (90% of final value in moving air)
Operating Conditions 32 to 122^oF (0 to 50^oC); < 80% RH non-condensing
Storage Conditions -40 to 185^oF (-40 to 85^oC); <99% RH non-condensing
Power Supply
9 Volt battery
Battery Life
Approx. 24 hours
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.
Extech recommends that annual calibrations be performed to verify meter
performance and accuracy.
Support line [phone]
Technical support: Extension 200; E-mail: [e-mail]
Repair & Returns: Extension 210; E-mail: [e-mail]
Product specifications subject to change without notice
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
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RH490 V2.0 12/06