La Crosse Technology WS9501 User manual

Table of Contents
1. Safety information
1.1 Preparation
1.2 Usage
1.3 Marking
1.4 Maintenance
2. Description
2.1 Part name
2.2 Button description
2.3 Sign definition
3. Specification
3.1 General
3.2 Technical data
4. Operating guidance
4.1 Power On/Off
4.2 Reading hold
4.3 Backlight function
4.4 Wind speed measurement
4.5 Wind speed unit selection
4.6 Area setting
4.7 Air volume measurement
4.8 Air volume unit selection
4.9 Temperature unit selection
4.10 Temperature mode selection
4.11 USB real time data uploading
4.12 Use tripod connection receptacle
4.13 Replace battery
5. Attachments

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Digital Anemometer
Operation Manual
Safety Information
1. Safety Information
Please read carefully the following safety information before usage
and maintain this anemometer while using it according to operating
guidance, otherwise, the anemometer may be damaged. The anemometer
will provide satisfactory services to you if you use and protect it
appropriately.
1.1 Preparation
1.1.1 Please check for damage during transportation after receiving the
anemometer.
1.1.2 If it should be stored and shipped under hard conditions, please
confirm that whether the meter is damaged.
1.2 Usage
1.2.1 The meter should be used in the range of specified ambient
temperature and humidity.
1.2.2 If you notice any abnormality or failure, it should stop using.
1.2.3 Don’t store or use the meter under the conditions of direct sunlight,
high temperature and high humidity.
1.2.4 Don’t touch the fan blades with excessive force.
1.2.5 Don’t directly expose the blades in the hard light to avoid reading
error.
1.3 Marking
The mark indicates compliance with EMC requirements.
Important Safety Information
1.4 Maintenance
1.4.1 Repair or maintenance should be implemented by trained personnel.
1.4.2 If there is dust on the fan blade, please blow it with clean air or scrub
gently with a damp cloth and mild detergent.
1.4.3 Clean the meter with a damp cloth and mild detergent. Don’t use

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abrasive material or solvent.
1.4.4 The meter should be powered off when it is not in use.
1.4.5 The meter will consume small current, about ≤ 5μA, after shutdown. If
the meter is not to be used for a long period, batteries should be
removed to prevent damaging the meter.
2. Description
- This meter is a digital anemometer for measuring the ambient
temperature, humidity, dew point temperature, wet bulb temperature,
wind speed, and air volume.
- This meter is a portable, professional measuring instrument with
large-screen LCD and backlight, multi-unit switching functions.
- This meter can be used for hand-held or fixed measurement.
- This meter has the functions of reading hold, maximum, minimum, etc.
- It has a low battery indicator and USB real time data uploading functions.
Note : The Wet Bulb Temperature is the isobaric and adiabatic saturation temperature. The wet
bulb temperature of the thermometer is measured with a thermometer on which water
evaporates. The humid temperature is always lower than the dry temperature; they are all the
more equal as the relative humidity is close to 100%. The dry temperature and the wet
temperature are simultaneously measured by means of a psychrometer.
2.1 Part name
⑴ Fan
⑵ LCD
⑶“ ”→ Power switch
⑷“HOLD/MODE” hold display, switch temperature mode
⑸“/USB”→ Backlight/USB real time data
⑹“FUNC” → Function switching button
⑺Maximum/Minimum button
⑻“UNIT” → Unit switching button
⑼ Fan retaining bolt hole

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⑽USB cable socket
⑾Battery housing cover retaining bolt hole
⑿ Battery cover
⒀ Connection hole for fixing measurement bracket
2.2 Button description
 Button:
Switch for meter powering on/off.
 /USB button
Switch for turning on/off the backlight and USB transmission.
 HOLD/MODE button
Switch for reading retention and temperature mode.
 FUNC button
It is used for switching among the functions of wind speed measurement,
area setting and air volume measurement. Long press for three seconds
to enable or disable "Auto Power-Off" function.
 MAX/MIN button
Switch maximum/minimum/normal mode.
 UNIT button
Switch unit, area (m², ft²), long press to switch (°C, °F)
Wind speed (m/s, km/h, mil/h, ft/m, ft/s, knots),
Air volume (CMS, CMM, CFM).

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2.3 Sign definition
Indicates Auto Power-Off status
H Reading hold state
VEL Wind speed measurement state
FLOW Air volume measurement state
AREA Area setting required by air volume
DP Indicates that the current mode is dew point temperature mode
WB Indicates that the current mode is wet bulb temperature mode
°C, °F Temperature unit.
%RH Relative humidity sign
USB Indicates that USB real time data uploading is enabled
MAX Displays maximum after entering maximum/minimum mode
MIN Displays minimum after entering maximum/minimum mode
m² Indicates that the current area setting unit is square meter
ft² Indicates that the current area setting unit is 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
MPH Nautical miles per hour
Low battery indicator
3. Specification
The meter should be recalibrated under the condition of 18°C～28°C,
relative humidity ＜75% every year.
3.1 General
3.1.1 Work height: Maximum 2000m
3.1.2 Work mode: Frequency of wind speed conversion
3.1.3 Display: LCD

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3.1.4 Maximum show value: 9999
3.1.5 Sampling time: About 0.4s/time.
3.1.6 Auto power off: Turn off after 10 minutes
3.1.7 Low battery indicator: sign displays on LCD.
3.1.7 Work power: 2×1.5V AAA batteries.
3.1.8 Operation environment:
Relative humidity→ 0~85%RH, no moisture condensation.
Temperature→ 0°C~40°C, no moisture condensation.
3.1.9 Detector (fan) operation environment:
Relative humidity→ 0~95%RH, no moisture condensation.
Temperature→ -20°C~70°C, no moisture condensation.
3.1.10 Storage environment:
Relative humidity→ 0~80%RH, no moisture condensation
Temperature→ -10°C~60°C, no moisture condensation
3.1.11 Dimension: Meter →165LX85 WX38Hmm.
3.1.12 Weight: About 200g
3.2 Technical data
Ambient temperature: 235°C, Relative humidity: <75%
3.2.1 m/s
Measuring
range
Resolut
ion
Accuracy
0.80 ~ 30.00
m/s
0.01
m/s
±(2.0% reading
+ 50
characters)
30.00 ~
40.00 m/s
For reference
only
3.2.2 km/h
1.40~108.00
km/h
0.01km
/h
±(2.0% reading
+ 50
characters)
108.0 ~ 144.0
km/h
For reference
only

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3.2.3 ft/s
1.30 ~ 98.50
ft/s
0.01
ft/s
±(2.0% reading
+ 50
characters)
98.50 ~
131.20 ft/s
For reference
only
3.2.4 knots
Measuring
range
Resolut
ion
Accuracy
0.80 ~ 58.30
knots
0.01
knots
±(2.0%
reading + 50
characters)
58.30~77.70
knots
For reference
only
3.2.5 MPH
Measuring
range
Resolut
ion
Accuracy
0.90 ~ 67.20
MPH
0.01MP
H
±(2.0% reading
+ 5 characters)
67.20~90.00
mil/h
For reference
only
3.2.6 ft/m
Measuring
range
Resolut
ion
Accuracy
78 ~ 5900
ft/m
1ft/m ±(2.0%
reading + 5
characters)
5900 ~ 7874
ft/m
For reference
only

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3.2.7 Air volume unit
CFM 0-
99990
(Area) 0 -
9.999 ft²
CMM 0-
99990
(Area) 0 -
9.999 m²
CMS 0 -
9999
(Area) 0 -
9.999 m²
3.2.8 Ambient temperature, dew point temperature, wet bulb temperature
Measuring
range
Resolut
ion
Accuracy
-10°C～60°C 0.1°C 1.5°C
14°F～＋
140°F
0.1°F 2.7°F
3.2.9 Relative humidity
Measuring
range
Resolut
ion
Accuracy
(20～
80)%RH
0.1%R
H
3%RH@25°C
(<20
or >80)%RH
0.1%R
H
5%RH@25°C
4. Operating guidance
4.1 Power On/Off
Press the “ ” key more than 2 seconds to turn on, push it again to turn off the
anemometer power.
4.2 Reading hold
In the measurement process, if the reading should be kept, press
"HOLD/MODE" key to lock the reading, and display the HOLD symbol “H”;
press it again to unlock.

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4.3 Backlight
In the measurement process, if the ambient light is too dark to read,
you can press " " key to open the backlight. Backlight timer is set to 15
seconds. During this period, you can press " " key again to turn off
backlight at any time.
Note:
 The luminous body of backlight is LED with large operating current.
Frequently using backlight will shorten battery life. Do not use backlight
when unnecessary.
 When the battery voltage ≤ 7V, the " " (low battery) symbol will show
on the display. However, in the case of using the backlight, if the battery
voltage ≥ 7V, the battery voltage drops because of its larger operating
current, " " symbol may show (when " " symbol is showing, the
accuracy of the measurement can’t be guaranteed). At this moment,
you needn’t replace battery until the " " symbol display again under
normal use condition without using backlight.
4.4 Wind speed measurement
Place the detector (fan) into the test environment, "VEL" symbol will
display on the screen, measurement is done with the fan surface
perpendicularly to the wind direction.
Note:
1. If the detector (fan) is not aiming at the wind direction, which will bring
the measurement error.
2. For steady wind, the detector (fan) will get maximum reading when it is
aiming at the wind direction.
4.5 Wind speed measurement
When using the meter to measure air volume, you can press “UNIT”
key to select the measurement unit you required (m/s, km/h, MPH, ft/m, ft/s,
knots).