Extech Instruments RH390

RH390 V2.0 03/05
3
Meter Description
1. Humidity & Temperature Sensor
2. LCD Display
3. Power ON/OFF button
4. °F/°C/WBT (wet bulb)/Dew Point button
5. MIN/MAX button
6. HOLD/Backlight button
Note: The battery compartment is located
on the rear of the instrument
Display Description
1. Relative Humidity %
2. Dew Point
3. Wet Bulb
4. °C/°F
5. Temp/WB/DP Display
6. Maximum
7. Minimum
8. Low Battery
9. Hold
10. RH% Display
11. Auto Off
1
2
4
5
3
6
Dewpoint
WetBulb
°C °F
MAX MIN
9
10
8
11
67
1
4
2
3
5