Extech Instruments EA80 User manual

User Manual
Indoor Air Quality Meter/Datalogger
Model EA80
C
C
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EA80-en-GB_V3.6 11/16
2
Introduction
Congratulations on your purchase of the Extech EA80 Indoor Air Quality Meter. This meter
measures Carbon Dioxide (CO2, ppm) levels, ambient Temperature and Relative Humidity
(%RH). 16,200 readings can be logged by the meter and later transferred to a PC. This
meter is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service.
Description
1. Display
2. Gas exhaust
3. Gas inlet port (rear of meter)
4. PC Interface jack
5. AC adapter socket (9V, 300mA)
6. Power Button
7. Data Hold Button
8. Backlight Button
9. MX/MN Button
10. SET Button
11. ALARM button
12. MEM (memory) button
13. (Enter) button
14. READ button
15. TIME button
16. °C/°F button
17. DEW button
18. WET button
19. Temperature / Humidity sensor probe
Three Tier LCD Display
1
2
3
4
5
6
78
9
10
11
12
13
14
15 16
17
18
19
SET
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EA80-en-GB_V3.6 11/16
3
Preparation for Use
Power Supply
The meter is powered by six (6) 1.5V ‘AAA’ alkaline batteries or by an AC adapter.
Installing the Batteries
Insert six (6) AAA batteries as indicated by the diagram located on the inside of the
battery compartment.
When the battery voltage drops below the operating voltage, the “ +” indicator will
be displayed indicating that the batteries need to be changed.
AC Adapter
The AC adapter allows the meter to be powered from a common AC wall outlet. When
using the AC adapter, the batteries (if installed) will be bypassed. The AC adapter is
not a battery charger.
Gas Inlet
Always ensure that the meter’s gas inlet port (3), the vented opening located on the
rear of the meter, and gas exhaust port (2), which is located at the top of the meter,
are not blocked.
Operation
Note: Exhaled CO2will affect the accuracy of the reading; do not hold meter
near the face.
Taking Measurements
The sensor for Temperature, Humidity, Dew Point, and Wet Bulb measurements is
located in the remote probe. Hold the probe in the air in the area to be tested. DO NOT
immerse in liquid. The sensor for CO2 measurements is located at the top of the meter.
Selecting temperature units of measure (C/F)
Press the °C/°F button momentarily to toggle the temperature units.
CO2 Measurement
1. Press button to turn on the meter,
2. The sensor requires a 30 second warm-up
before displaying the CO2 measurement.
3. The meter sensor requires approximately10
minutes to stabilize in still air before the
readings can be considered accurate. Moving
the meter may decrease this stabilization time.
4. The primary display indicates the CO2 reading.
The secondary display indicates temperature. The third display indicates %RH.
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EA80-en-GB_V3.6 11/16
4
Humidity Measurement
1. Press the “ ” button to power the meter ON.
2. The display will indicate the humidity reading (% RH) directly on the third display.
3. Hold the probe in the air in the area to be tested. Do NOT immerse in liquid.
4. Allow adequate time for readings to stabilize.
5. Read the measurements on the LCD.
Temperature Measurement
1. Press the “ ” button to power the meter ON.
2. Press the °C/°F button momentarily to toggle the temperature units.
3. The display will show the Temperature reading directly on the second display.
4. Allow adequate time for readings to stabilize.
5. Read the measurements on the LCD.
Dew Point Temperature Measurement
1. Press the “ ” button to power the meter ON.
2. Press the “DEW” button
3. The display will show the Dew Point Reading on the second display.
4. Allow adequate time for the readings to stabilize
5. Read the measurements on the LCD.
6. Press the “DEW” button again to exit the dew point temperature reading.
Wet Bulb Temperature Measurement
1. Press the “ ” button to power the meter ON.
2. Press the “WET” button
3. The display will show the Wet Bulb Reading on the second display.
4. Allow adequate time for the readings to stabilize
5. Read the measurements on the LCD.
6. Press the “WET” button again to exit the display.
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EA80-en-GB_V3.6 11/16
5
MAX
CO 2
ppm
d-h
m:s
8
MIN
CO 2
ppm
d-h
m:s
CO 2
ppm
d-h
m:s
CO2Maximum and Minimum Recording Measurement
1. Press “MX/MN” button to enter the maximum /
minimum recording mode, the “MAX” icon
appears on the display. The maximum CO2
reading will be displayed and will be updated
only when a higher reading occurs.
2. Press “TIME” button to enter time display mode.
Displays 2 and 3 will indicate the time the
maximum reading occurred.
3. Press “MX/MN” button again. The “MIN” icon
will appear with the minimum value and its
stamp time.
4. Press “MX/MN” button again. The “ᇞ” icon will
appear with the current value and current time.
5. Press “MX/MN” button again cycle through the
recorded MAX, MIN and current readings.
6. Press “” button to exit this mode.
7. Press “TIME” button exit the time display
mode.
Data Hold
1. Press the Hbutton momentarily to freeze the
displayed reading. The 'H' icon will appear on
the upper left-hand side of the display.
2. Press the Hbutton again to return to normal
operation (the 'H' hold icon will disappear).
Backlight
1. Press the button to turn the backlight on or off.
2. The backlight will turn off automatically after 30 seconds.
SET MAX
MIN
ALM
R
M
Err
INTV
Err
CO 2
ppm
ppm
%RH
d-h
CO 2
DEW
WET
°C°F
ppm
CO 2
m:s
8888
8888 8888
88
CAL
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EA80-en-GB_V3.6 11/16
6
SET
ALM
CO 2
ppm
ppm
CO 2
ppm
CO 2
CO2Alarm Operation
Setting the Alarm Limit Values
1. Press “ALARM” button to turn on the alarm function, the “ALM” icon, and current
value are displayed.
2. Press “SET” button to enter High/Low limit
value setting mode, the “SET” icon is displayed
and hundred and thousand digits of the high
limit value will flash.
3. Press “” or “” button to set desired value.
4. Press “” button to move the cursor to set the
tens and ones digits.
5. Press “” or “” button to enter the desired value.
6. Press “” button to move the cursor to the hundred and thousand digits of the low
limit value.
7. Press “” or “” button to set desired value.
8. Press “” button to move the cursor to move the cursor to set the tens and ones
of the low limit value.
9. Press “” or “” button to set desired value.
10. To change any setting, press “” or “” button to move the cursor to desired high
or low limit value position.
11. Press “” button to store these setting and exit this mode.
Turning Alarm On / Off
1. Press “ALARM” button to turn on the alarm function, “ALM” is displayed.
2. When the CO2value is below the low limit value, the meter displays “” mark and
beeps.
3. When the CO2value exceeds the high limit value, the meter displays “” and
beeps.
4. To exit the ALARM function, press “ALARM” button again.
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EA80-en-GB_V3.6 11/16
7
Setting the Real Time Clock
1. Press “SET” button to enter the real-time clock
setting mode, “SET” is displayed and the
minutes are flashing.
2. Press “” or “” button to set the minutes.
3. Press “” button to move the cursor to
seconds.
4. Press “” or “” button to set the seconds.
5. Press “” button to move the cursor to days.
6. Press “” or “” button to set the day of the real time date. (Please note that this
is not a calendar. Days are elapsed days up to 99 total)
7. Press “” button to move the cursor to the hours. (Please note that this is a 24
hour clock)
8. Press “” or “” button to set the hours.
9. To change any setting, press “” or “” button to move the cursor to desired
position.
10. Press “” button to store the settings and exit this mode.
SET MAX
MIN
ALM
R
M
Err
INTV
Err
CO 2
ppm
ppm
%RH
d-h
CO 2
DEW
WET
°C°F
ppm
CO 2
m:s
8888
8888 8888
88
CAL
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EA80-en-GB_V3.6 11/16
8
Manual Datalogging
Storing readings
Press the "MEM" button. The LCD will display "M" and the
memory address number. The total memory size is 99
readings.
Viewing readings
Press the "READ" button to enter READ mode. The LCD
will display "R" and the memory address number.
Press " " or " " to scroll through the stored readings.
Press " " enter to exit this mode.
Deleting stored data
Press the “SET” button three times. The LCD will display “CLr” and the meter will enter
the Clear Memory mode.
Press “” to clear the all manually stored readings.
To abort, press the “SET” button twice and then press the “” button to exit the Clear
Memory mode.
Auto Datalogging
Setting interval time
Press “SET” two times. The “INTV” mark will appear and the meter will enter the
Interval Time setting mode.
Use the “” or “” button to select the desired interval time from 1 to 255 seconds.
Press the “” button to store the value and to exit the mode.
Auto Datalogging mode
Press and hold “MEM” for two seconds (3 beeps), the LCD will display the “ ” icon
and the memory location.
The “M” will flash each time a recording is made.
The maximum memory capacity is 16,200 recordings that can be divided into 99 sets.
Press the “” button to exit this mode and to stop recording.
Deleting Logged Data
Press “SET” four times, the “CLr” and “ ” mark will be displayed.
Press the “” button to clear the automatically stored data and to exit this mode.
To abort, press the “SET” button again then press the “” button to exit.
SET MAX
MIN
ALM
R
M
Err
INTV
Err
CO2
ppm
ppm
%RH
d-h
CO 2
DEW
WET
°C°F
ppm
CO 2
m:s
8888
8888 8888
88
CAL
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EA80-en-GB_V3.6 11/16
9
Calibration
CO2 Calibration
1. Press “ ” to turn the meter on.
2. Place the meter in a known CO2 reference for 10 minutes.
3. Press the “SET” button 5 times until “C-01” is displayed in the second display.
4. Press “►” or “◄” to select digits to adjust (flashing).
5. Press “▼” or “▲”to adjust the display to the reference value.
6. Press “” to store the value and exit the calibration mode.
Humidity Calibration
1. Press “ ” to turn the meter on.
2. Place the probe in a known humidity reference for 60 minutes.
3. Press the “SET” button 6 times until “SET” and “CAL” are displayed on the LCD.
4. Press “▼” or “▲” to adjust the display to the reference value.
5. Press “” to store the value and exit the calibration mode.
Temperature Calibration
1. Press “ ” to turn the meter on.
2. Place the probe in a known temperature reference for 60 minutes.
3. Press the “SET” button 7 times until “SET” and “CAL” are displayed on the LCD.
4. Press “▼” or “▲” to adjust the display to the reference value.
5. Press “” to store the value and exit the calibration mode.
PC Interface, Software Installation and Operation
This meter has the capability to connect to and communicate with a PC. To install and use
the software, please refer to the instructions provided on the supplied CD-ROM and/or the
instructions provided in the HELP Utility within the software program.
Check the software download page of the website
the PC software and its operating system compatibility.
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EA80-en-GB_V3.6 11/16
10
Specifications
Display Three Tier LCD
Display Rate One reading per second
Low Battery Indication The “ +” icon is displayed when the battery voltage
drops below the operating voltage
Power Supply Six (6) AAA-size alkaline batteries or AC adapter (120V)
Battery Life Approx. 8 hours using alkaline batteries (with backlight
and Alarm functions OFF)
Manual Data Memory Capacity 99 records
Auto Datalogging Capacity 16,200 records in up to 99 data sets
Operating Temperature Range 5°C to 50°C (41°F to 122°F)
Storage Temperature Range -10°C to 60°C (-14°F to 140°F)
Operating Humidity Range 10%RH to 90%RH, non-condensing
Storage Humidity Range 10%RH to 90%RH, non-condensing
Dimensions 158 (L) x 72(W) x 35(H) mm (6.22” x 2.83” x 1.38”)
Weight 255g (0.56 lbs) approx. (including batteries)
Accessories Instruction Manual, Batteries, AC Adaptor, Software CD
ROM, and PC Interface Cable
CO2 Specifications
Sensing Range 0 to 6000ppm
Sensing Resolution 1ppm
Accuracy 3% of reading or 50ppm, whichever is greater
@ 101.4 kPa (29.92 inHg) and @ 25°C (77°F)
Sensing Method Dual wavelength detector with non- dispersive infrared
(NDIR) sensor
Gas Sampling Mode Diffusion type
Warm up time 10 seconds
Response time < 10 minutes in still air
Temperature Coefficient Add 0.36% of reading per °C (0.2% of reading per °F)
when deviating from calibration temperature
Temperature & Humidity Specifications
Relative Humidity Air Temperature
Dew Point and Wet Bulb are calculations
Range 10% ~ 95% RH -20°C ~ +60°C (-4°F ~ +140°F)
Resolution 0.1% RH 0.1°C (0.1°F)
Accuracy 3%RH @ 25°C (77°F), 30~95%RH)
5%RH @ at 25°C (77°F), 10~30%RH) 0.5°C (0.9°F)
Sensor type Precision capacitance sensor Thermistor
Response time 45%RH95%RH≦1min
95%RH45%RH≦3min 10°C (18°F) / 2sec
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EA80-en-GB_V3.6 11/16
11
Maintenance
Cleaning
Periodically wipe the case with a dry cloth or a damp cloth with mild detergent.
Do not use abrasives or solvents to clean this instrument.
Battery Replacement
When the “ ” symbol appears on the LCD, the six 1.5V ‘AAA’ must be replaced.
1. Turn the meter off
2. Remove the meter’s rubber protective jacket
3. Remove the flat-head screw at the rear of the meter
4. Remove the meter’s battery cover
5. Replace the batteries observing polarity
6. Affix the battery cover, secure the rear screw, and re-attach the meter’s rubber
protective jacket
Never dispose of used batteries or rechargeable batteries in household
waste.
As consumers, users are legally required to take used batteries to
appropriate collection sites, the retail store where the batteries were
purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is
obligated to take end-of-life devices to a designated collection point for the
disposal of electrical and electronic equipment.

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