Specifications; Meter Description - Extech Instruments RH401 User Manual

Specifications

Function
Humidity
Temperature (Air)
Temperature (InfraRed)
(@25ºC ±5ºC)
Display
Sensor Type
Dew Point
Wet Bulb
IR Emissivity
IR Spot/Distance Ratio
IR Response Time
Operating Conditions
Storage Conditions
Power Supply
Battery Life
Dimensions / Weight

Meter Description

1. Emissivity adjust indicator
2. Laser pointer on indicator
3. Low Battery indicator
4. IR Surface Temperature button
5. ON/OFF/Setup button
6. Back Light button
7. Laser/Down button
8. °F/°C/Up button
9. Dew Point/Wet Bulb button
10. % Humidity display
11. Air Temperature, Dew Point or Wet Bulb display
12. IR Surface Temperature display
13. Extended probe with Humidity &
Air Temperature Sensors
14. PC interface port
15. AC adaptor jack
Note: The battery compartment is located on the rear of the instrument
Range and Resolution
0.0 to 100.0% RH
o
-4.0 to 122.0 F (-20 to 50
o
-4 to 842 F (-20 to 450
o
-40 to -4 F, 842 to 932
o
-40 to -20 C, 450 to 500
Triple LCD with backlight
Humidity: Capacitance sensor; Temperature (air): Thermistor
o
-90.4 to 122.0 F (-68 to 50
temperature measurements)
o
-6.9 to 122.0 F (-21.6 to 50
temperature measurements)
Adjustable from 0.3 to 0.99
8:1
0.5 seconds
o o
-4 to 122 F (-20 to 50
o
-40 to 185 F (-40 to 85
4 x 1.5V 'AAA' batteries or AC adaptor
approx. 150 hours (laser inactive); 30 hours (laser active)
6.8x2.7x1.9" (175x70x50mm); 4.9 oz. (140g)
2
Accuracy
±3% RH (10 to 90%)
o o o
C) ±1.8 F (±1 C)
±3% reading or ±3
o
C)
whichever is greater
o
F
±4% reading or ±4
o whichever is greater
C
o
C) (calculated from humidity and
o
C) (calculated from humidity and
C); < 99% RH non-condensing
o
C); <99% RH non-condensing
1
DP
2
Wb
H
umi
3
4
5
6
o o
C/6 F
o o
C/8 F
13
C
12
11
%
10
15
9
14
8
7
RH401 V1.4 11/07