Dawson DAM100B User manual

Dawson DAM100B
Digital Anemometer
User Manual

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Table of Contents
LIMITED WARRANTY AND LIMITATION OF
LIABILITY ........................................................3
Out of the Box............................................4
Accessories ................................................4
Certification: ..............................................4
INTRODUCTION .............................................4
Overview....................................................4
Important Safety Information ...............7
USING THE METER.........................................8
Figures and Components ...........................8
Buttons and Components......................8
Front Panel............................................9
Back Panel...........................................10
Buttons ................................................11

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Symbols....................................................12
MEASUREMENT ...........................................13
Wind Speed and Air Velocity....................13
Air Volume Area Setting ..........................14
Air Volume Measurement .......................15
Air Volume Unit Selection........................15
Maximum/Minimum ...............................15
Temperature Unit Selection.....................16
Temperature Mode Selection ..................16
SPECIFICATIONS...........................................17
General Specifications .............................17
Technical Specifications ...........................18
MAINTENANCE AND REPAIR.......................21
Repair ......................................................21
Replacing Batteries..................................22

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CONTACT DAWSON.....................................22
FEATURES ....................................... Back Page
LIMITED WARRANTY AND
LIMITATION OF LIABILITY
This instrument from Dawson Tools Inc. will be free from defects
in workmanship and material for three years from the date of
original purchase. This warranty does not cover defects resulting
from damage caused by the user such as drops, neglect, misuse,
unauthorized alteration, usage outside of specified conditions,
contamination, or improper repair/maintenance. To receive
service on the instrument if it becomes necessary during the
warranty period, contact your nearest Dawson authorized service
center at [phone] or visit www.DawsonTools.com to
obtain a return authorization (within the US only). A return
authorization is necessary before returning any instrument to
Dawson; no service will be provided without a return
authorization. The user is responsible for properly packing the
unit and charges such as shipping, freight and insurance charges.
The extent of Dawson's liability is limited solely to the
repair/replacement of the instrument. The above warranty in its
entirety is inclusive and no other warranties, written or oral, are
expressed or implied.

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Out of the Box
Check the Meter and accessories thoroughly before using
the Meter. Contact your local distributor if the Meter or
any of its components are damaged or malfunction.
Accessories
9V Battery 1pc
Soft Case 1pc
User Manual 1pc
Certification:
The mark indicates the Meter is compiled to EMC
requirements.
Introduction
Overview
Dawson digital anemometer DAM100B is a professional
instrument to measure ambient temperature, humidity,
dew point temperature, wet bulb temperature, wind
speed and air volume. The compact design enables the

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Meter to be hand-held or fixed. The large LCD screen
with backlight provides easy-to-read testing results.
To ensure this anemometer performs properly and to
avoid any damage from misuse, please follow these
safety guidelines carefully.
Safety Information
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK,
PRODUCT DAMAGE OR PERSONAL INJURY, PLEASE
FOLLOW THE SAFETY INSTRUCTIONS DESCRIBED IN THE
USER MANUAL. READ THE USER MANUAL BEFORE
USING THE METER.
WARNING
DO NOT PLACE THE METER IN ANY ENVIRONMENT WITH
HIGH PRESSURE, HIGH TEMPERATURE, DUST, EXPLOSIVE
GAS OR VAPOR. TO ENSURE SAFE OPERATION AND LIFE
OF THE METER, FOLLOW THESE INSTRUCTIONS.

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Avoid shaking, dropping or any kind of
impacts when using or transporting the meter.
To avoid possible electric shock or personal
injury, repairs or servicing not covered in this
manual should only be performed by qualified
personnel.
Avoid direct exposure to sunlight to ensure
extended the life of the Meter.
Do not place the Meter in a strong magnetic
field; this may cause false readings.
Use only the type of batteries indicated in the
Technical Spec.
Avoid exposing batteries to humidity. Replace
batteries as soon as the low battery indicator
appears.
Sensitivity of the Meter to temperature and
humidity will decrease over time. Please
calibrate the Meter periodically for best
performance.
Please keep original packaging for future
shipping purposes (ex. Calibration)
After opening box, check for any damage
during delivery.
The Meter should only be used in the range of
specified ambient temperature and humidity.

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Do not touch the fan blades with excessive
force.
Important Safety Information
Repair or maintenance should be
implemented by trained personnel.
If dust appears on the fan blades, blow on it
with clean air or scrub gently with a damp
cloth and mild detergent. Don't use abrasive
materials or solvents.
The Meter should be turned off when it is not
in use.
The Meter will consume a small current,
about < 5μA, after shutdown. If the Meter is
not being used for an extended period of time,
batteries should be removed to prevent any
damage to the Meter.

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Using the Meter
Figures and Components
Buttons and Components
(1) Fan blades
(2) LCD Screen
(3) “FUNC” —Function switching button
(4) “ ”— Power switch
(5) “UNIT” —Switch between measurement units;
Wind speed (m/s, km/h, mil/h, ft/m, ft/s,
knots), Air volume (CMS, CMM, CFM). When
in Area mode (m²/ft²), press to increase
flashing place value. In Wind speed and Air
volume, press 2-3 seconds to switch
temperature unit (°C/°F).
(6) “Max/Min” —Maximum/Minimum/Normal
mode.
(7) “HOLD/MODE” ; ” Hold display. In Wind
speed/Air volume modes, press and hold 2-3
seconds to switch temperature mode
(ambient temp, dew point, wet bulb)

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(8) “”— Back light
(9) Fan retaining bolt hole
(10) Connection hole for fixed measurement
(11) Battery housing cover screw
(12) Battery cover
Front Panel

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Back Panel

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Buttons
Power On/Off Press the “ ” key to turn on/off
the Anemometer.
Reading hold In the measuring process, press
"HOLD" key to lock the reading;
press it again to unlock.
Note: In the reading hold state, “FUNC”, “MAX/MIN”
and “UNIT” buttons are not functional.
Backlight In the measurement process, if the
display is too dark for reading,
press backlight button to turn on
LCD backlight. Backlight timer is set
for 15 seconds; during this period,
press the button again to turn off
backlight.
Note:
Using the backlight will consume more power.
Using backlight frequently will reduce battery
life. Use backlight only when needed.

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When the battery voltage drops below 7V, the
“” (low battery) symbol will show on the
display. However, if the battery voltage is
greater than 7V, the low battery will still show
up when requiring large operating current.
When the “ ” (low battery) symbol appears,
the accuracy of the measurement is not
guaranteed.
Replacement of the battery is only necessary
when the “ ” (low battery) symbol appears
again under regular operating condition (ex.
without LCD backlight).
Symbols
The following symbols are found on the Meter or in this
manual.
Auto Off On
Reading Hold
VEL Wind Speed Measurement
Flow Air Volume Measurement
Area Area Setting (Required For Air Volume)
DP “Dew Point” Temperature Mode
WB “Wet Bulb” Temperature Mode
°C, °F Temperature Unit

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%RH Relative Humidity
MAX Displays Maximum
MUN Displays Minimum
M² Square Meter
Ft² Square Foot
CMM Cubic Meters per Minute
CMS Cubic Meters per Second
CFM Cubic Feet per Minute
Knots Nautical Miles per Hour (1850 Meters per
Hour)
ft/s Feet per Second
ft/m Feet per Minute
m/s Meters per Second
Km/h Kilometers per Hour
Mil/h Miles per Hour
Low Battery Indicator
Measurement
Wind Speed and Air Velocity Measurement (VEL)
Place the Meter in the test environment. Turn on power
switch, “VEL" is displayed on the screen. Speed/velocity
will be measured in the direction of the wind
perpendicular to the fan surface. Point the white arrow
on the top of the Meter at the incoming wind.

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Note:
If the Meter is not aiming in the direction of
the wind, measurements may not be accurate.
When in steady wind the Meter will only
acquire the maximum speed when the fan
surface is perpendicular to the wind direction.
When using the Meter to measure air speed, press
“UNIT” key to select the measurement unit (m/s, km/h,
mil/h, ft/m, ft/s, knots).
Air Volume Area Setting
To measure air volume, first determine the area of air.
Area input steps are shown as follow:
1. Press “FUNC” key to enter “AREA” mode.
2. Use the “MAX/MIN” and “UNIT” keys to
adjust value and place, and area unit (m², ft²).
Press “MAX/MIN” key again after area unit
adjustment to confirm the input. Two beeps
will indicate that area input is completed and
settings are saved.
3. To change the area setting, please repeat step
2 under “AREA”mode.

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Air Volume Measurement
Place the Meter in the test environment. Use the “FUNC”
key to set the Meter to the Air Volume Measurement
mode; the "FLOW" symbol should display on the screen.
The fan surface should be placed perpendicular to the
wind direction.
Note:
If the Meter is not perpendicular to the wind
direction, the measurement is not guaranteed.
When in steady wind the Meter will only
acquire the maximum speed when the fan
surface is perpendicular to the wind direction.
Air Volume Unit Selection
When the Meter is used to measure air volume, press
“UNIT” key to select the desire measurement unit (CMS,
CMM, CFM).
Maximum/Minimum
To show the maximum value of the readings,
press “MAX/MIN”button till “MAX”is
displayed.

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To show the minimum of the readings, press
“MAX/MIN”button till “MIN”is displayed.
To show current readings, press “MAX/MIN”
button till the LCD does not display “MAX”or
“MIN”.
Temperature Unit Selection
Press and hold “UNIT” key for 3 seconds to switch
between temperature units (°F, °C).
Temperature Mode Selection
Press the “HOLD/MODE” key for 3 seconds to switch
temperature modes (Default - Ambient Temp, DP -Dew
Point Temperature, and WB -Wet Bulb Temperature).
Note:
Temperature Mode Selection is disabled when MAX/MIN
is in use.
Auto Off
When not in use, the Meter will automatically turn off in
30 seconds. To disable Auto Off, hold “FUNC” till “ ”
symbol disappears; hold “FUNC” again to turn Auto off
back on.

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Specifications
General Specifications
The Meter’s accuracy is guaranteed between 64°F to
82°F (18°C~28°C),relative humidity < 75% within one
year. Recalibrating annually is recommended.
Operating Altitude: Maximum 7000 ft (2000 m)
Calculation Principle: Speed measured by RPM
of the fan.
Display: LCD
Maximum value: 9999
Sampling time: ~ 0.4s/time.
Low Battery Indicator: Sign displays on LCD
Battery: 1×9V battery.
Operation environment:
oRelative humidity–0~85%RH, no
moisture condensation
oTemperature 32°F to 104°F
(0°C~40°C), no moisture
condensation
Detector (fan) operation environment:
oRelative humidity–0~95%RH, no
moisture condensation;

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oTemperature -4°F to 176°F
(-20°C~80°C), no moisture
condensation.
Storage environment:
oRelative humidity0~80%RH, no
moisture condensation
oTemperature: 14°F to 122°F
(-10°C~50°C), no moisture
condensation
Dimension(L x W x H):6.5”x3.3”x1.5” (165 x 85
x 38 mm)
Weight: 0.4lb(200gm)
Technical Specifications
Air Velocity
Units
Measuring Range
Accuracy*
Resolutions
ft/s
1.30 ~ 98.50
ft/s
±(2.0% reading
+ 50 counts)
0.01 ft/s
98.50 ~ 131.20
ft/s
For reference
only
ft/m
78 ~ 5900 ft/m
±(2.0% reading
+ 5 counts)
1ft/m

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5900 ~ 7874
ft/m
For reference
only
mil/h
0.90 ~ 70.00
mil/h
±(2.0% reading
+ 50 counts)
0.01mil/h
70.00~90.00
mil/h
For reference
only
m/s
0.80 ~ 30.00
m/s
±(2.0% reading
+ 50 counts)
0.01 m/s
30.00 ~ 40.00
m/s
For reference
only
km/h
1.40~108.00
km/h
±(2.0% reading
+ 50 counts)
0.01km/h
108 ~ 144 km/h
For reference
only
Knots
0.80 - 58.30
knots
0.01knots
±(2.0%
reading+ 50
characters)
0.01mil/h
58.30 - 77.70
knots
For reference
only