Fluke Fluke-61 User manual
Specifications
Temperature range -18 to 275°C (0 to 525°F)
Display Resolution 0.2°C or 0.5°F
Accuracy For targets at:
(assumes ambient operating -1 to 275°C (30 to 525°F) ±2% of reading
temperature of 23°C [73°F]) or ±2°C (±3.5°F), whichever is greater
-18 to -1°C (0 to 30°F) ±3°C (±5°F)
Temperature Coefficient 0.2K per °C or 0.2% per °C, whichever is greater
Repeatability ± 2% of reading, or ± 2°C (±3.5°F)
whichever is greater
Response time 500 mSec, 95% response
Spectral response 7–18 µm
Emissivity pre-set 0.95
Ambient operating range 0 to 50°C (32 to 120°F)
Relative humidity 10–90% RH noncondensing, @ up to 50°C (120°F)
Storage temperature -20° to 60°C (-4° to 140°F) without battery
Weight / Dimensions 227 g (0.5 lb);184 x 45 x 38 mm
(7.25 x 1.75 x 1.5 in) without holster
341 g (0.75lb);190 x 51 x 41 mm
(7.5 x 2.0 x 1.6 in) with holster
Power 9V Alkaline or NiCd battery
Battery life (Alkaline) 12 hrs
Distance to Spot Size 8:1
Specifications subject to change without notice.
• Battery Compartment
• Batteriefach
• Logement des piles
• Compartimento de las pilas
• Compartimento de bateria
•
•
• On Button
• Einschaltknopf
• Bouton Marche
• Botón de encendido
• Gatilho
•
•
HOLD
• Wrist Strap Connection
• Befestigung der Handschlaufe
• Point d’attache de la dragonne
• Correa de mano
• Conexão para alça
•
•
• °C/°F Switch
• °C/°F-Schalter
• Commutateur °C/°F
• Interruptor de °C/°F
• Chave °C/°F
•
•
• Laser
• Láser
•
•
• Battery Cover
• Batterieabdeckung
• Couvercle du lcompartiment pile
• Tapa de las pilas
• Tampa da bateria
•
•
• Serial Number Label
• Laser Warning
Label
• Display
• Anzeige
• Affichage
• Pantalla
• Display
•
•
2
English Warning
Do not point laser directly at eye or indirectly off
reflective surfaces.
Cautions
Use this unit only as specified in this manual or the
protection provided by the unit may be impaired.
All models should be protected from the following,
▲EMF (electro-magnetic fields) from arc welders,
induction heaters
▲Static electricity
▲Thermal shock (caused by large or abrupt ambi-
ent temperature changes—allow 30 minutes for
unit to stabilize before use)
▲Do not leave the unit on or near objects of high
temperature
Introduction
We are confident you will find many uses for your
handheld noncontact thermometer. Compact, rugged,
and easy to use—just aim, press the trigger, and read
surface temperatures in less than a second. You can
safely measure surface temperatures of hot, hazardous,
or hard-to-reach objects without contact.
How it Works
Infrared thermometers measure the surface tempera-
ture of an object. The unit’s optics sense emitted (E),
reflected (R), and transmitted (T) energy, which is
collected and focused onto a detector. The unit’s
electronics translate the information into a temperature
reading which is displayed on the unit. The laser is
used for aiming purposes only.
3
English
How to Operate the Unit
°C/°F and Battery
Open the battery compartment to access the C/F
switch or to insert/remove the battery. To switch
between °C and °F, toggle the switch (A). Insert the
9v battery positive side first into the battery
compartment.
Operating the Unit
To measure a temperature, point unit at object and
press the On Button. Be sure to consider distance-
to-spot size ratio and field of view. If the unit is
equipped with a laser, use the laser only for aiming.
See ‘How to Accurately Measure Temperatures’.
Display
The backlit LCD displays the current temperature in
Celsius or Fahrenheit. The unit will hold the reading
for 7 seconds after the On Button is released; the word
HOLD appears. The presence of the battery icon
indicates a low battery (B).
HOLD
B
CF
9v
Battery
+-
A
4
English How to Accurately Measure
Temperature
Locating a Hot Spot
To find a hot spot aim the thermometer outside the
area of interest, then scan across with an up and
down motion until you locate the hot spot.
Field of View
Make sure that the target is larger than the unit’s spot
size. The smaller the target, the closer you should be
to it. When accuracy is critical, make sure the target
is at least twice as large as the spot size.
Distance & Spot Size
As the distance (D) from the object increases, the
spot size (S) of the area measured by the unit
becomes larger.
Reminders
■Not recommended for use in measuring shiny
or polished metal surfaces (stainless steel,
aluminum, etc.). See Emissivity.
■The unit cannot measure through transparent
surfaces such as glass. It will measure the
surface temperature of the glass instead.
■Steam, dust, smoke, etc., can prevent accurate
measurement by obstructing the unit’s optics.
D8
3"@ 24"
2"@ 16"
1"@ 8"
25 @ 200mm
50 @ 400mm
75 @ 600mm
Yes No
5
English
Emissivity
Most organic materials and painted or oxidized surfaces have an emissivity of
0.95 (pre-set in the unit). Inaccurate readings will result from measuring shiny or
polished metal surfaces. To compensate, cover the surface to be measured with
masking tape or flat black paint. Allow time for the tape to reach the same tempera-
ture as the the material underneath it. Measure the temperature of the tape or paint-
ed surface.
Maintenance
Lens Cleaning: Blow off loose particles using clean compressed air. Gently brush
remaining debris away with a camel's hair brush. Carefully wipe the surface with a
moist cotton swab. The swab may be moistened with water.
NOTE: DO NOT use solvents to clean the plastic lens.
Case Cleaning: Use soap and water on a damp sponge or soft cloth.
NOTE: DO NOT submerge the unit in water.
Troubleshooting
Code Problem Action
– – – (on display) Target temperature Select target within specifications
is over or under range
Battery icon appears Possible low battery Check and/or replace battery
Blank display Possible dead battery Check and/or replace battery
Laser doesn’t work Low or dead battery Replace battery
6
English
LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for one year
from the date of purchase. This warranty does not cover fuses,
disposable batteries, or damage from accident, neglect, misuse, alteration, contamina-
tion, or abnormal conditions of operation or handling. Resellers are not authorized to
extend any other warranty on Fluke’s behalf. To obtain service during the warranty
period, contact your nearest Fluke authorized service center to obtain return autho-
rization information, then send the product to that Service Center with a description of
the problem.
THIS WARRANTY ISYOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS
FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE
ISNOT LIABLE FOR ANYSPECIAL,INDIRECT, INCIDENTALORCONSEQUENTIAL
DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some
states or countries do not allow the exclusion or limitation of an implied warranty or of
incidental or consequential damages, this limitation of liability may not apply to you.
CE Certification
This instrument conforms to the following standards:
• EN 61326-1 Electromagnetic Emissions and Susceptibility
• EN 61010-1 General Safety
• EN 60825-1 Laser Safety
Between approximately 250Mhz and 800 Mhz at 3V/m, the instrument may not
meet its stated accuracy.
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