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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 power falls low, the 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.
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
Display
Response Time:
Operating Conditions
Storage Conditions
Power Supply
Battery Life
Dimensions / Weight
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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)
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
6
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
RH390-EU-EN V2.3 07/13
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