REED LM-8000 User manual

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Model
LM-8000
4-in-1 Pocket
Thermo-Anemometer,
Hygrometer,
Thermometer &
Illuminometer
Instruction
Manual

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Table of Contents
Features......................................................................................2-3
Specications.............................................................................3-4
Instrument Description .................................................................. 5
Measuring Procedures ...............................................................5-6
Air Velocity Measurement............................................................ 5
Temperature Measurement (Thermocouple) .............................5-6
Relative Humidity Measurement .................................................. 6
Light Measurements ................................................................... 6
Additional Functions...................................................................... 7
Hold Function ............................................................................. 7
Data Record Function ................................................................. 7
Auto Power Off .......................................................................... 7
Battery Replacement..................................................................... 8
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [email protected].
Features
• 4-in-1 professional measuring instrument: Anemometer, Hygrometer,
Thermometer, and Light meter
• Tiny bone shape with lightweight and small size case design are
suitable for handling with one hand
• Wristlet design provides extra protection to the instrument especially
for user one hand operation
• Low-friction ball bearing mounted wheel design provides high accuracy
at high and low air velocity

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• Exclusive photo diode and color correction lter light sensor, spectrum
meets C.I.E. photopic
• High precision thin-lm capacitance humidity sensor with fast response
to the humidity changes
• Standard type K (NiCr-NiAl) thermocouple input jack suitable for all
kinds of type K probe
• Built-in microprocessor circuit assures excellent performance and accuracy
• Concise and compact buttons arrangement, easy operation
• Memorize the maximum and minimum value with recall
• °C/°F selectable by pressing button on the front panel
• Lux/Feet-candle selectable by pressing button on the front panel
• Zero button design makes light meter calibration
• Hold function to freeze the current reading value
Specifications
General Specifications
Display 8 mm LCD display
Measurement Anemometer, Humidity, Temperature & Light
Operating Humidity Max. 80% RH.
Operating Temp. 0 to 50°C (32 to 122°F)
Over Input Display Indication of “- - - -”
Power Supply 006P DC 9V battery (Heavy-duty type)
Power Consumption Approx. DC 6.2 mA
Weight 160g (battery included)
Dimensions 156 H x 60 W x 33 D mm (6.14 x 2.36 x 1.29”)
Optional Accessories :
Model CA-52A Carrying Case. Temperature probes: Model LS-109 Surface
Probe: Ribbon style probe with a maximum temperature of 400°C. Model LS-139
Surface Probe: Spring loaded probe is ideal for all high temperature applications.
Model LS-104 Right Angle Surface Probe: Unique right angle design allows
temperature of hard to reach areas to be taken. Model LS-103 Air/Gas Probe:
Perforated shield permits fast response while providing element protection.
Model LS-107 General Purpose Probe: Used to measure both air and liquids, but
is recommended for immersion applications. Model LS-134A Needle Tip Probe:
Medium gauge hypodermic needle tip, used to measure softer food stuffs,
rubber and solids.

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Electrical Specifications (23 ± 5°C)
Measurement Range Resolution
Air velocity
ft/min 80 to 5910 ft/min 1 ft/min
m/s 0.4 to 30.0 m/s 0.1 m/s
km/h 1.4 to 108.0 km/h 0.1 km/h
MPH 0.9 to 67.0 mile/h 0.1 MPH
knots 0.8 to 58.3 knots 0.1 knots
Temperature
(thermister)
32 to 122°F 0.1°F
0 to 50°C 0.1°C
Humidity
% RH 10 to 95 %RH 0.1 %RH
Temperature
(thermister)
32 to 122°F 0.1°F
0 to 50°C 0.1°C
Light
*auto range
Lux 0 to 2,200 Lux 1 Lux
1,800 to 20,000 Lux 10 Lux
Ft-cd 0 to 204.0 Ft-cd 0.1 Ft-cd
170 to 2,000 Ft-cd 1 Ft-cd
Temperature (Type K) -148 to 2372°F 0.1°F
-100 to 1300°C 0.1°C
Measurement Range Accuracy
Air velocity
80 to 5910 ft/min
≤ 20 m/s : ± 3% F.S.
> 20 m/s : ± 4% F.S.
0.4 to 30.0 m/s
1.4 to 108.0 km/h
0.9 to 67.0 mile/h
0.8 to 58.3 knots
32 to 122°F ± 2.5°F
0 to 50°C ± 1.2°C
Humidity
10 to 95 %RH < 70% RH : ± 4 %RH;
≥70% RH : ± ( 4%rdg + 1.2 %RH )
32 to 122°F ± 2.5°F
0 to 50°C ± 1.2°C
Light 0 to 20,000 Lux ± 5% rdg ± 8 dgt
0 to 2,000 Ft-cd
Temperature
(Type K)
-148 to 2372°F ± (1% rdg + 2°F)
-100 to 1300°C ± (1% rdg + 1°C)
ft/min = feet per minute MPH = miles per hour
m/s = meters per second knots = nautical miles per hour
km/h = kilometers per hour Ft-cd = foot candle

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Instrument Description
1 - Power Button
2 - Hold Button
3 - Max/Min Button
4 - Unit/Zero Button
5 - °C/°F Button & Lux/Ft-cd Button
6 - Function Button
7 - Air Flow Sensor
8 - Thermocouple Input Socket
9 - R.H. Sensor
10 - Light Sensor
11 - LCD display
12 - Battery Compartment/Cover
13 - Wristlet
Measuring Procedures
Air Velocity Measurement
1) Power on the instrument by pressing the “Power Button” (#1, above).
2) Select the Anemometer function by pressing “Function Button”
(#6, above).
3) Press the “Unit/Zero Button” (4, above) to select unit that you want and
then face the “Air Flow Sensor” (7, above ) to the source of wind.
4) Allow time for the reading to become stable and note the value
indicated. From a practical point of view the velocity may uctuate.
Temperature Measurement (Thermocouple)
1) Power on the instrument by pressing the “Power Button” (#1, above).
2) Plug a type K thermocouple probe in the “Thermocouple Input Socket”
(#8, above).
3) Select the Temperature function by pressing “Function Button”
(#6, above).
4) Contact the Thermocouple Sensor Head with the object being
measured and the reading value will be displayed on the LCD display.

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Measuring Consideration of Temperature Measurement (Thermocouple)
• Make sure the polarity is correct when you plug a thermocouple probe
in the Temperature Input Socket (#8, above).
• The temperature difference between thermocouple probe and thermometer
will cause an inaccurate measuring result. Therefore, for the best measuring
and accuracy performance, whenever changing a probe or plugging in a
new probe, thermal equivalence between the probe plug and meter’s input
socket is required. The thermal equivalent procedure may take few minutes
and only needs to be done when the probe has been exposed to an ambi-
ent temperature different from the meter.
Humidity & Ambient Temperature Measurement
1) Power on the instrument by pressing the “Power Button” (#1, page 5).
2) Select the Relative Humidity function by pressing “Function Button”
(#6, page 5).
3) Meanwhile the reading value of relative humidity and temperature will
be displayed on the LCD display.
4) When the meter is applied in a new environment, it will take a few
minutes to reach a stable condition.
Light Measurement
1) Power on the instrument by pressing the “Power Button” (#1, page 5).
2) Select the Light Measurement function by pressing the “Function
Button” (#6, page 5) until the light value is displayed. The light display
digits are oriented 180° from the other function displays for easy
exposure and output reading of the light sensor.
3) Press the “Lux/Ft-cd Button” (#5, page 5) to select measuring unit
“Lux” or “Ft-cd”.
Zero Offset Adjustment of Light Function
• For best results you should zero the light sensor prior to use in a dark
environment. To achieve this, place the light sensor end of the meter
under a desktop or at surface to block any light. Press the “Unit/Zero
Button” (#4, page 5) setting the meter indication to zero.
• The zero point can drift due to environment temperatures, battery
power, as well as various other reasons. It is recommended that the
zero be checked frequently using the above procedure.

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Additional Functions
Hold Function
Pressing the “Hold Button” (#2, page 5) will freeze the current value with a
“HOLD” symbol on the display. Press again to release the hold function.
Data Record Function
1. The Data Record function records & displays the maximum and
minimum reading values. Start the Data Record function by pressing
the “Max./Min. Button” (#3, page 5) once. There will be a “REC”
symbol on the display.
2. With the REC symbol on the display:
(a) Press the “ Max./Min. Button “ (#3, page 5) once and the “Max”
symbol along with the maximum value will appear on the display.
(b) Press the “Max./Min. Button” again, the “Min” symbol along with
the minimum value will appear on the display.
(c) To exit the memory record function, press the “Max./Min. Button”
continuously for at least 2 seconds. The display will revert to the
current reading.
(d) To clear the Max./Min. value recorded by pressing the “Hold Button”
(#2, page 5) once. The previously recorded Max./Min. value will be
lost and then revert to the REC. function continuing to record.
Auto Power Off
In order to prolong the battery life, the instrument has “Auto Power Off”
function. The meter will switch off automatically if no buttons are pressed
for around 10 minutes.

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Battery Replacement
1. When the left corner of the LCD display shows the low battery symbol
“ ”, this indicates that replacement of the battery is then needed.
However specication measurements could still be taken for another few
hours before the meter becomes inaccurate.
2. Open the Battery Cover (#8, page 4) at the back of the meter and
remove the battery.
3. Replace with a 9V battery (alkaline or heavy-duty type)
and reinstall the cover.
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [email protected].
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