Maintenance; Cleaning And Storage; Battery Replacement; Specifications - Extech Instruments RH390 User Manual

Maintenance

Cleaning and storage

Battery Replacement

Specifications

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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).
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
Function Range and Resolution
Humidity
90.0 to 100.0%RH
Temperature
Wet Bulb 0 to 80°C (32 to 176°F)
Dew Point -30 to 100°C (-22 to 199°F)
Display Dual LCD
Response Time: <30 seconds (90% of final value in moving air)
Operating Conditions 32 to 122
Storage Conditions -40 to 185
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)
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0.0 to 10.0%RH
10.0 to 90.0%RH
o
-30.0 to -20.0 C
o
-22.0 to – 4.0 F
o
-19.9 to 70.0 C
o
-3.9 to 158.0 F
o
70.1 to 100.0 C
o
158.1 to 199.0 F
o o
F (0 to 50 C); < 80% RH non-condensing
o o
F (-40 to 85 C); <99% RH non-condensing
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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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