Wet Bulb Measurements; Temperature Measurements; Data Hold - Extech Instruments RH390 User Manual

Wet Bulb measurements

Temperature measurements

Data Hold

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1. To select the Wet Bulb measurement,
press the °°F/°C/WBT/Dew Point
button until WET BULB (°F or °C)
appears in the lower right.
2. Wet Bulb temperature is now
displayed.
1. To select the temperature measurement,
press the °F/°C/WBT/Dew Point button
until °C or °F appears in the lower right.
2. Temperature is now displayed.
Press the hold button (
freeze the displayed readings."HOLD" will appear
on the upper left-hand side of the display. Press
the hold button ( ) again to return to normal
operation.
GlobalTestSupply
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) momentarily to
4
°C °F
WetBulb
°C °F
WetBulb
MAX MIN
°C °F
WetBulb
RH390-EU-EN V2.3 07/13
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