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EM20
Digital Anemometer
User Manual
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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■ Introduction
EM20 Digital Air Flow anemometer is designed to
measure Temperature and Air Flow, simultaneously.
It is normally used to measure the temperature and
air speed at ventilation outlets.
■Features
1. Display: the top display line shows the velocity
and the bottom display shows the temperature.
2. Parameters:
Velocity：m/s, km/h, fpm, mph, kts, Beaufort
Temperature：°C,°F
3. Resolution:
Velocity: 0.1m/s，fpm；
Temperature: 0.1,°F 0.1°C
4. Range:
Velocity: 0.4 ~ 20m/s, 80 ~ 4000fpm
Temperature: -10 ~ 50 , 14 ~ 122
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5. Accuracy:
Velocity: ± (2% of reading + 0.3m/s)
± (2% of reading + 60fpm)
Temperature: ±1 ±1.8
6. Sample rate: 2 time /sec
7. Operating environment:
14℉ to 122℉ (-10℃ to 50℃), 0 to 80%RH
8. Storage environment:
-4℉ to 140℉ (-20℃ to 60℃)，0 to 80%RH
■ Instrument Description
1. Sensor cover
2. Vane sensor
3. Temperature and
Humidity sensor
4. LCD display
5. Function key
1
2
3
4
5
Unit
ON/OFF
Temperature and
Vane anemometer
Func.
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LCD A (Type A/Type B)
Symbol Designations:
Number
of Order
Symbol
1
2
Functions
Indicating it is
now in the
data-holding
mode
Indicating the
display value
being the
maximum
value(MAX)
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Indicating the
display value
3
being the
minimum
value(MIN)
4
5
6
7
8
9
Measure values
Temperature unit
Batteries should
Indication to the
calibration mode
Humidity unit
Velocity unit
Indication low
power of
batteries.
be replaced.
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■ Operating instructions
Temperature/Vane anemometer:
1. Press the ON/OFF key to turn the power on.
2. To guarantee correct readings: position
instrument so that air flows through the vane
and make sure the vane sensor is upright into
the wind direction for measurement.
3. Make sure the reading stabilizes before
recording the value.
■Function Keys
Temperature/Vane anemometer:
1. ON/OFF key
Power ON/OFF function:
Press the key to turn the power ON and press
the key once more to turn the power OFF.
2. Func. key
1) Press the key to select the state of MAX、MIN、
HOLD.
The cycle of views shows as following figure:
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Func.key Func. key
Measure mode Hold mode Max
mode
Func. key Func. key
Min mode
l Hold mode: Reading is held.
l Max mode: Maximum values since the
instrument was last switched on or last reset.
l Min mode: Minimum values since the
instrument was last switched on or last reset.
2) Back light control
Press and hold the Func. key for more than 1
second. The back light will be turned on, Press
and hold the key again for more than 1 second
and the light will be turned off. The backlight
turns off after 60 seconds.
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3. Unit key
1) Unit and Auto power off set
Velocity unit:
Press Unit key to change the Velocity unit. (m/s,
km/s, fpm, mph, kts, Beaufort scale)
Temperature unit：
Press and hold the Unit key for more than
1second to change the Temperature unit.
(℃,℉)
2) Auto power off
The meter will power itself off after 20 minutes if
there is no key operation.
To Cancel auto power off function: Press and
hold the ON/OFF key until the LCD displays AP
ON. Press Unit key to select AP ON or AP OFF,
then press the Func. key to confirm the setting.
AP ON ----- Auto power off is active.
AP OFF --- Auto power off is inactive.
■. Maintenance
1. CLEANING INSTRUCTIONS
The meter may be wiped down with a wet
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sponge or cloth using a mild, water based
detergent.
NOTE:
This unit is not designed for complete
submersion or washing in water.
2. BATTERY REPLACEMENT
Use the following procedure:
When the battery voltage drops below proper
operation range the symbol will appear on
the LCD display and the battery needs to be
replaced.
∞ Press the battery cover towards the arrowhead to
open the battery cover.
∞ Replace the battery with three new AAA (1.5V)
batteries.
∞ Replace the battery cover.
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WARRANTY
Sealed Unit Parts Co., Inc. warrants that it will repair or
furnish without charge a similar product to replace any
product which, within the specified warranty term after
the date of sale by the Wholesaler, is proved to the
satisfaction of Sealed Unit Parts Co., Inc. , to have
been defective at the time it was sold. Said warranty is
in effect only when said item is used in accordance with
the instructions and recommendations of Sealed Unit
Parts Co., Inc.
This warranty applies only to products which after
shipment from the factory, have not been altered,
changed, repaired, or treated in any manner
whatsoever.
This warranty to repair or replace is the only warranty
either expressed, implied or statutory and is the only
warranty being issued herein; Sealed Unit Parts Co.,
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Inc.'s liability in connection with its products is
expressly limited to the repair or replacement of
defective parts. All other damages and warranties,
statutory or otherwise, are being expressly excluded.
No representative of Sealed Unit Parts Co., Inc. has
authority to change this warranty in any manner
whatsoever. No attempt to repair or promise to repair or
improve any part covered by this warranty by any
representative of this company shall be effective unless
signed by a properly authorized officer of Sealed Unit
Parts Co., Inc.
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
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