Maintenance; Battery Replacement; Specifications - Extech Instruments RH490-NIST User Manual

Maintenance

Cleaning and storage
1. The meter should be cleaned with a damp cloth and mild detergent when necessary. Do not use
solvents or abrasives.
2. Store the meter in an area with moderate temperature and humidity (refer to the operating and
storage range in the specifications chart earlier in this manual).

Battery Replacement

When the battery becomes weak the "
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.
You, as the end user, are legally bound (Battery ordinance) to return all used batteries
and accumulators; disposal in the household garbage is prohibited!
You can hand over your used batteries / accumulators at collection points in your
community or wherever batteries / accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle

Specifications

Function
Humidity
Temperature
Wet Bulb
Dew Point
Mixing Ratio
Display
Response Time:
Operating Conditions
Storage Conditions
Power Supply
Battery Life
Dimensions / Weight
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" battery symbol will appear on the LCD. Replace the 9
Range and Resolution
0.0 to 10.0%RH
10.0 to 90.0%RH
90.0 to 100.0%RH
-30.0 to -20.0
-22.0 to – 4.0
-19.9 to 70.0
-3.9 to 158.0
70.1 to 100.0
158.1 to 199.0
0 to 80°C (32 to 176°F)
-30 to 100°C (-22 to 199°F)
0 to 1120 GPP (grains per pound)
0 to 160 g/kg (grams per kilogram)
Dual LCD
<30 seconds (90% of final value in moving air)
o
32 to 122 F (0 to 50
o
-40 to 185 F (-40 to 85
9 Volt battery
Approx. 24 hours
7.8 x 1.7 x 1.3" (200 x 45 x 33mm); 7 oz. (200g)
Copyright © 2013 FLIR Systems, Inc.
www.extech.com
o
C
o
F
o
C
o
F
o
C
o
F
o
C); < 80% RH non-condensing
o
C); <99% RH non-condensing
5
Accuracy
±3%RH
±2%RH
±3%RH
o
±1.5 C
o
±2.7 F
o
±1 C
o
±1.8 F
o
±1.5 C
o
±2.7 F
Calculated from RH and air
temperature measurements
RH490-EU-EN-V2.2-07/13