Specifications; Calibration And Repair Services - Extech Instruments RH490 User Manual

Specifications

Function Range and Resolution
Humidity
10.0 to 90.0%RH
90.0 to 100.0%RH
Temperature
Wet Bulb 32 to 176°F (0 to 80°C)
Dew Point -22 to 199°F (-30 to 100°C)
0 to 1120 GPP (grains per pound)
Mixing Ratio
0 to 160 g/kg (grams per kilogram)
Display
Response Time:
Operating Conditions 32 to 122
Storage Conditions
Power Supply
Battery Life
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 (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
0.0 to 10.0%RH
o
-22.0 to – 3.9 F
o
-30.0 to -19.9 C
o
-4.0 to 158.0 F
o
-20.0 to 70.0 C
o
158.1 to 199.0 F
o
70.1 to 100.0 C
Dual LCD
<30 seconds (90% of final value in moving air)
o o
F (0 to 50 C); < 80% RH non-condensing
o o
-40 to 185 F (-40 to 85 C); <99% RH non-condensing
9 Volt battery
Approx. 24 hours
7
Accuracy
±3%RH
±2%RH
±3%RH
o
±2.7 F
o
±1.5 C
o
±1.8 F
o
±1 C
o
±2.7 F
o
±1.5 C
Calculated from RH and air
temperature measurements
RH490 V2.0 12/06