Fluke 65 User manual
Model 65 English Instruction Sheet
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1
®
Model 65
Infrared Thermometer
Instruction Sheet
Introduction
The Fluke Model 65 Infrared Thermometer (“the thermometer”) is
a noncontact thermometer with laser pointer. The thermometer
determines an object's surface temperature by measuring the
amount of infrared energy radiated by the surface.
Noncontact thermometers can be used to measure surface
temperatures that are unsuitable for traditional contact
measurement methods (such as moving objects, electrically live
surfaces, and difficult-to-reach objects).
Box Contents
Thermometer, holster, carrying case, 2 AA alkaline batteries (not
installed), Instruction Sheet, Quick Reference Card, and
Registration Card.
Contacting Fluke
To contact Fluke call:
1-888-993-5853 in USA and Canada
+31-402-678-200 in Europe
+81-3-3434-0181 Japan
+65-738-5655 Singapore
+1-425-356-5500 in other countries
Visit Fluke’s web site at: www.fluke.com.
PN 801818 (English) January 1999
© 1998 Fluke Corporation, All rights reserved.
Model 65 English Instruction Sheet
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WWarning
To avoid possible personal injury:
⇒Caution - performance of procedures other than
those specified herein may result in hazardous
light exposure.
⇒Do not stare into the laser beam or direct it
toward the eyes.
Caution
To avoid possible damage to the thermometer or
incorrect measurements:
⇒Do not drop the thermometer or subject it to
violent shocks.
⇒Do not operate the thermometer near large
electrical or magnetic fields.
⇒Do not touch the object with the thermometer.
⇒If the emissivity of the object is not 0.95, the
thermometer can indicate a temperature
different from the actual temperature. (See
"Emissivity.")
⇒Keep the thermometer away from direct
sunlight or a strong source of light, hot objects
(70 oC / 158 oF), high temperatures, high
humidity, or dust during use and storage.
⇒Do not apply sudden temperature changes to
the thermometer. Before taking measurements,
wait for the thermometer to return to a stable
temperature.
⇒Do not touch the focal lens.
⇒Condensation may form on the focal lens if the
thermometer moves quickly from a cold to a hot
environment. Before taking measurements, wait
for the condensation to dissipate.
Model 65 English Instruction Sheet
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Components
MIN
MAX
MEMORY
RECALL
°F
°C
Press 1 Second
SAVETEMPMEM
4
12
5
3
6
7
810
9
aab03f.eps
AFocal lens
BLaser aperture
CPushbuttons
DHolster
EDisplay
FLaser safety label
GBattery door release
HBatteries
IBacklight switch
JLaser switch
Model 65 English Instruction Sheet
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Pushbuttons
Pushbutton Description
GPress and hold Gto display the object’s surface
temperature. The thermometer clears any stored
maximum and minimum temperatures. The laser
pointer only activates if the laser switch is in the on
position.
While Gis pressed, the display shows HHHHH.
Release Gto stop measuring temperatures and
deactivate the laser. The display continues to show
the most recent temperature and Cfor 20
seconds. Then the display turns off.
FPress Fto display the maximum measured
temperature. The display shows MAX.
Press Fa second time to display the minimum
measured temperature. The display shows MIN.
Press Fa third time to turn off this function.
EPress Eand hold for 1 second to save the
displayed temperature. The display flashes TEMP
MEM 5 times to indicate that the operation is
successful.
Press Eto display a stored temperature. The
display shows TEMP MEM. Press Eagain to
turn off this function.
DPress Dto switch between oC and oF.
Pressing any of the three top pushbuttons wakes up
the thermometer.
Model 65 English Instruction Sheet
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Display Elements
4
5
6
7
3
12
8
9
aab01f.eps
ALaser-enabled indicator
BMeasurement activity indicator
CTemperature hold indicator
DBattery level indicator
EMeasured surface temperature value
FCelsius or Fahrenheit mode
GStored temperature indicator
HMaximum, minimum, or stored temperature value
IMaximum or minimum temperature indicator
Ensuring Accuracy
Emissivity
Emissivity is a value between 0 and 1 that indicates an object’s
ability to emit infrared energy. Emissivity is determined primarily
by the object’s composition and surface finish. A polished, non-
oxidized metallic surface has an emissivity value near 0 and a
dull, black surface has an emissivity value near 1. (See
"Emissivity of Common Materials.")
The thermometer’s sensitivity to emissivity is set at the factory to
0.95. If the emissivity of the object is not 0.95, the displayed
temperature could differ from the actual surface temperature. To
reduce this difference, apply black tape, black matte paint, or
black magic marker to the object if it is safe to do so and
measure the darkened surface.
Model 65 English Instruction Sheet
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Optical Resolution
Optical resolution (also called "Field of View" or "Distance-to-
Spot-Size Ratio") is the ratio of the thermometer’s distance from
the object’s surface to the size of the area measured ("spot
size"). The closer the thermometer is to the object, the smaller
the spot size. The laser spot size does not indicate the measured
spot size. (See "Laser Offset.")
The thermometer has an 8:1 optical resolution:
1
8
aab02f.eps
Distance 200 mm
(8 in) 400 mm
(16 in) 600 mm
(24 in) 800 mm
(32 in)
Spot Size 25 mm
(1 in) 50 mm
(2 in) 75 mm
(3 in) 100 mm
(4 in)
The minimum spot size is 25 mm (1 in), which occurs at a
distance of 200 mm (8 in) from the object. You cannot measure a
smaller spot size by getting closer.
The temperature displayed is an average temperature within the
spot size. Hot spots can be missed if the spot size is too large.
Get as close as possible but no closer than 200 mm (8 in).
Laser Offset
The laser beam is offset 18 mm (0.75 in) from the focal lens.
Choose a sampling spot large enough to include the laser offset.
Surface Temperatures
The thermometer measures the first surface it detects, even a
glass cover, dust, or fog. Make sure the object is not obstructed.
Model 65 English Instruction Sheet
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Measuring Temperatures
Read the section "Ensuring Accuracy " before measuring
temperatures. Check that the batteries are installed and the laser
switch is in the on position. (See the sections "Installing the
Batteries" and "Setting the Switches.")
To take a measurement:
1. If the emissivity of the object is different from 0.95, apply
black tape, black matte paint, or black magic marker to the
object if it is safe to do so. (See the section "Emissivity of
Common Materials.")
2. Point the thermometer at the object.
3. Press
Gand aim the laser beam in the center of the area to
be measured. The display shows the measured temperature.
Out-of-Range Temperatures
The display indicates when a measured temperature reaches the
detection limits of the thermometer. When you recall an out-of-
range temperature, the display shows "Lo" and "Hi" as "---."
Temperature Display
511 °C (951 °F)
500 °C (932 °F)
-50 °C (-58 °F)
-40 °C (-40 °F)
aab04f.eps
Out of range. "Hi" flashes.
Temperature flashes.
Temperature does not flash.
Temperature flashes.
Out of range. "Lo" flashes.
Model 65 English Instruction Sheet
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Maintenance
Installing the Batteries
Remove the holster before replacing the battery or setting the
switches.
Caution
⇒Match the +and −polarities of the battery with the
battery case.
⇒Do not attempt to recharge the batteries.
⇒Do not throw batteries into a fire.
⇒Follow local laws or regulations when disposing
batteries.
The Bindicates battery life remaining. Replace both
batteries when Istarts blinking.
Cleaning the Focal Lens
Do not use solvents to clean the focal lens. Blow off loose
particles using clean, dry compressed air. Gently brush
remaining debris away with a camel hair brush or high-quality
lens tissue. The tissue may be moistened with clean water.
Cleaning the Case and Holster
Use soap and water or a mild commercial cleaner. Wipe with a
damp sponge or soft rag.
Model 65 English Instruction Sheet
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Setting the Switches
The switches enable the laser beam and display backlight. To
activate the laser, press G. The factory settings are in the on
positions. The on position is to the right and the off position is to
the left.
Troubleshooting
Condition Solution
The laser will not activate. If the display does not turn on or
shows I, replace the battery.
If the display does not show A,
turn on the laser switch.
The thermometer seems to be
giving incorrect readings. Check for the conditions in
"Ensuring Accuracy" and "Cleaning
the Focal Lens."
The displayed temperature
fluctuates (but the surface
temperature remains
constant).
Leave the thermometer on until the
displayed temperature stabilizes.
(Some fluctuation is normal,
especially in the tenths digit.)
Calibration
Fluke recommends that you return the thermometer annually to a
Fluke Service Center for calibration, starting one year after
purchase.
Model 65 English Instruction Sheet
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Emissivity of Common Materials
Object Emissivity
Skin, human 0.98
Ice 0.96–0.98
Cement 0.96
Asphalt, Tar, Pitch 0.95–1.00
Concrete 0.94
Water 0.92–0.96
Plastic 0.90–1.00
Foods, bulk (fruits, oils, etc.) 0.85–1.00
Glass 0.85–1.00
Paint 0.80–0.97
Ceramic 0.80–0.94
Plaster 0.80–0.90
Wood 0.80–0.90
Steel, oxidized 0.80
Iron, oxidized 0.78–0.84
Copper, oxidized 0.78
Brass oxidized 0.56–0.64
Rolled stainless steel 0.45
Aluminum, oxidized 0.40
Zinc, galvanized 0.28
Copper, matte 0.22
Brass, polished 0.05
Iron, unoxidized 0.05
Copper, polished 0.02–0.07
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