Extech Instruments RH490 User Manual

RH490 V2.0 12/06
7
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Support line (781) 890-7440
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
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
Specifications
Function Range and Resolution Accuracy
0.0 to 10.0%RH ±3%RH
10.0 to 90.0%RH ±2%RH
Humidity
90.0 to 100.0%RH ±3%RH
-22.0 to – 3.9
o
F
-30.0 to -19.9
o
C
±2.7
o
F
±1.5
o
C
-4.0 to 158.0
o
F
-20.0 to 70.0
o
C
±1.8
o
F
±1
o
C
Temperature
158.1 to 199.0
o
F
70.1 to 100.0
o
C
±2.7
o
F
±1.5
o
C
Wet Bulb
32 to 176°F (0 to 80°C)
Dew Point
-22 to 199°F (-30 to 100°C)
Mixing Ratio
0 to 1120 GPP (grains per pound)
0 to 160 g/kg (grams per kilogram)
Calculated from RH and air
temperature measurements
Display Dual LCD
Response Time: <30 seconds (90% of final value in moving air)
Operating Conditions 32 to 122
o
F (0 to 50
o
C); < 80% RH non-condensing
Storage Conditions -40 to 185
o
F (-40 to 85
o
C); <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.

Extech Instruments RH490 Specifications

General

Brand	Extech Instruments
Model	RH490
Category	Thermometer
Language	English