Extech Extech EA20 Manual

User's Guide

Eas

yView™
Digital Hygro-Thermometer
and Datalogger

Model EA20

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Introduc

Congratulations on your purchase of the Extech EasyView™ EA20 Digital Hygro­Thermometer. This device measures Humidity, Temperature, Dew Point temperature
and Wet Bulb temperature. Advanced features include Manual Datalogging of up to 99
sets, MAX/MIN recording, Relative measurement mode, and elapsed timer. Careful use
of this meter will provide years of reliable service.

tion

Specifications

Function Range and Resolution Accuracy
Humidity 10.0 to 95.0% RH ±3% RH (at 25oC, 30 to 95% RH )

±5% RH (at 25

o

C, 10 to 30% RH )

Temperature -4 to 140oF (-20 to 60oC) ±1.8oF (±1oC)
Dew Point -4 to 140oF (-20 to 60oC) calculated

Wet Bulb -4 to 140oF (-20 to 60oC) calculated
Display Multifunction LCD with bargraph and status indicators
Sensor Type Humidity: Precision capacitance sensor

Temperature: Thermistor

Response Time Humidity: 45% to 95% < 1 min; 95% to 45% < 3 min.

Temperature: Approx. 2 seconds for a 10

o

C change

Sampling Rate 2 times per second
Datalogging Memory 99 sets
Operating Conditions 32 to 140
Storage Conditions 14 to 140

o

F (0 to 60oC); < 95% RH non-condensing

o

F (-10 to 60oC); <70% RH non-condensing

Power Supply 6 x 1.5V ‘AAA’ batteries with programmable auto power off (1

minute to 59 minutes in 7 selectable times)

Battery Life Approx. 200 hours
Dimensions / Weight 5.9 x 2.8 x 1.4” (150 x 72 x 35mm); 8.3 oz. (235g)

Meter Description

1. Humidity/Temperature Probe

2. Multifunction LCD with bargraph
and status indicators

3. Power ON/OFF button

4. MX/MN button

5. DATA HOLD button

6. Humidity / Temperature select
button

2

7. TIME button (for MX/MN elapsed
timer)

8. Temperature units (C/F) select
button

9. DEW POINT temperature select
button

4
3

6
9

10. RELATIVE mode button

11. WET BULB temperature select
button

12. MEM key manual datalogging
control key

13. READ key manual memory data reading
control key

14.

keys to select memory

location

Note: The battery compartment is located
on the rear of the instrument

5
7
8

1

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EA20 V1.7 02/10