Fluke 568 Operating Manual

568 EX

Infrared Thermometer

Users Manual

PN 4326622
June 2013

© 2013 Fluke Corporation. All rights reserved.
Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

This Fluke product will be free from defects in material and
workmanship for two years from the date of purchase. This
warranty does not cover fuses, disposable batteries, or
damage from accident, neglect, misuse, alteration,
contamination, 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 authorization information,
then send the product to that Service Center with a
description of the problem.

THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER
WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS
NOT LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL 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.

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

11/99

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

Table of Contents

Title Page

Introduction ................................................................ 1

Safety Information ...................................................... 2

Features ..................................................................... 5

Display ....................................................................... 5

Menu Overview ....................................................... 6

Save ........................................................................ 7

Light ......................................................................... 7

Memory ................................................................... 7

Emissivity Menu ...................................................... 7

°C and °F ................................................................. 9

Min, Max, Avg, Differential ...................................... 9

Alarm ....................................................................... 9

Trigger Lock ............................................................ 10

Laser ....................................................................... 10

Setup ....................................................................... 11

Language .............................................................. 11

Backlight ............................................................... 11

Time/Date ............................................................. 12

Delete Data ............................................................. 13

How the Product Works ............................................. 13

Product Operation ...................................................... 14

Temperature Measurement ..................................... 14

Find a Hot or Cold Spot ........................................... 14

Distance and Spot Size ........................................... 15

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Field of View ........................................................... 16

HOLD ...................................................................... 17

External Contact Probe ........................................... 18

Troubleshooting ...................................................... 18

Maintenance .............................................................. 19

Battery Replacement .............................................. 19

Clean the Lens ........................................................ 19

Clean the Case ....................................................... 19

Replacement Parts ................................................. 19

Specifications ............................................................ 20

General Specifications ............................................ 20

KTC Specifications ................................................. 21

ii

Introduction

The 568 EX Infrared Thermometer (the Product) is designed for
operation in potentially explosive areas of Zones 2 and 1 in
accordance with Directive 1999/92/EC respectively 94/9/EC
(ATEX).

Contact Fluke

To contact Fluke, call one of the following telephone numbers:

• Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)

• Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: [phone]

• Japan: [phone]

• Singapore: [phone]

• Anywhere in the world: [phone]

Or, visit Fluke's website at www.fluke.com.

To register your product, visit http://register.fluke.com.

To see, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals.

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Safety Information

The current operating instructions, EC Declaration of Conformity
and the Ex-certificate are available for download from the relevant
product page under http://www.fluke.com; alternatively they can be
requested directly from the manufacturer.

A Warning identifies conditions and procedures that are
dangerous to the user.

Symbols used on the Product and in this manual are explained in
Table 1. Laser safety markings are shown in Figure 1.

Note

For special safety information for use in ex-hazardous
areas, please see the additional Safety Instructions.



Warning

To prevent possible electrical shock, fire, eye
damage, or personal injury:

• Read all safety information before you use the

Product.

• Use the Product only as specified, or the

protection supplied by the Product can be
compromised.

• Do not use the product if it operates incorrectly.

• See emissivity information for actual

temperatures. Reflective objects result in lower
than actual temperature measurements. These
objects pose a burn hazard.

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Infrared Thermometer

Safety Information

• Do not look directly into the laser with optical

tools (for example, binoculars, telescopes,

microscopes). Optical tools can focus the laser

and be dangerous to the eye.

• Do not look into the laser. Do not point laser

directly at persons or animals or indirectly off

reflective surfaces.

• Use the Product only as specified or hazardous

laser radiation exposure can occur.

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Table 1. Symbols

Symbol Explanation

 Hazardous voltage. Risk of electrical shock.
 Risk of danger. Important information. See manual.
 Warning. Laser.
 Conforms to European Union directives.

°C Celsius
°F Fahrenheit

 Battery

This product complies with the WEEE Directive (2002/96/EC)
marking requirements. The affixed label indicates that you must not
discard this electrical/electronic product in domestic household



 Battery

Aperture

waste. Product Category: With reference to the equipment types in
the WEEE Directive Annex I, this product is classed as category 9
"Monitoring and Control Instrumentation” product. Do not dispose
of this product as unsorted municipal waste. Go to Fluke’s website
for recycling information.

Laser

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Figure 1. Laser Safety Markings

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Infrared Thermometer

Features

Features

• Single-spot laser sighting

• Backlight display

• MAX, MIN, DIF, and AVG temperature display

• 80PK-1 K-type thermocouple (KTC) probe

• Adjustable emissivity and predefined emissivity table

• Infrared and thermocouple temperature display

• Celsius or Fahrenheit temperature display

• Tripod mount

• Standard miniature KTC connector input

• 12 or 24 hour clock

• Last reading Hold (20 seconds) and auto off

• Multi-language interface

• High and low temperature alarm

• Data storage and review

• Trigger lock

Display

The Product display can show data in these languages:

• English

• German

• French

• Portuguese

• Simplified Chinese

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Menu Overview

Figure 2 shows the LCD and menu interface. Table 2 is a top-level
description of the menu.

Figure 2. Menu Navigation

Table 2. Top-Level Menu Description

Level Softke

1 Left Save Save reading to memor
2 Left Mem Review/delete memory entries
3 Left MnMx Enable Min/Max
4 Left °C/°F Toggle between C and F
5 Left  (Lock) Lock the Product on
6 Left Setup Turn off/on backlight
1 Right Light Adjust backlight brightness
2 Right  Set emissivity
3 Right Avg Enable Avg/Diff
4 Right Alarm Set and enable alarms
5 Right Laser Toggle the laser on/off

All Center Menu Advance the menu to the next level

Description

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Infrared Thermometer

Display

Save

To save readings:

1. Pull the trigger to take a measurement and release it to stop.

2. Push the Save softkey to enter the Save menu.

3. Push the Yes softkey to save the reading.

The saved reading includes:

• IR temperature

• Thermocouple temperature (if connected)

• Emissivity

• Min/Max/Avg/Dif (if Min/Max or Avg/Dif is enabled)

• Date/Time

You can push the Cancel softkey to stop saving the reading.

Light

The Product has a backlight display with two brightness levels.

To toggle the backlight brightness, push the Light softkey.

To disable the backlight, use the Setup menu.

Memory

The Product can store up to 99 measurement records.

To access records stored in memory, push the Menu softkey until
Mem shows as the left softkey, and then push the Mem softkey to
access the Memory menu.

Emissivity Menu

The Emissivity menu includes a list of pre-defined materials and
lists their typical emissivity values. See Table 3 for further
information.

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Note

Default emissivity is 0.95.

Table 3. Nominal Surface Emissivity

Material Value Material Value

Default**** 0.95
Aluminum* 0.30 Iron* 0.70
Asbestos 0.95 Lead* 0.50
Asphalt 0.95 Oil 0.94

Brass* 0.50 Paint 0.93
Ceramic 0.95 Plastic** 0.95
Concrete 0.95 Rubber 0.95
Copper* 0.60 Sand 0.90
Food - Frozen 0.90 Steel* 0.80
Food - Hot 0.93 Water 0.93

* Oxidized
** Opaque, over 20 mils
*** Natural
**** Factory Setting
Highlighted items may also be found in the emissivity table built
into the Product.

Glass

Wood

0.85

0.94

To access the Emissivity menu:

1. Push the Menu softkey until  shows as the right softkey

2. Push the  softkey.

To access the Emissivity list:

1. Push the Table softkey. The display shows a list of materials
and their suggested emissivity.

2. Use the down arrow to navigate through the list.

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Infrared Thermometer

Display

3. Push the Enter softkey to choose the necessary material.

To manually type the typical emissivity of a material:

1. Push the No. softkey.

2. Use the down or up arrow softkey to change the entry. Hold
down the arrow softkeys to increase the rate of change.

3. Push the Done softkey to return to the main menu.

°

C and °F

To toggle between °C and °F measurements, push the Menu
softkey until °C or °F shows as the left softkey, and then push the
necessary softkey.

Min, Max, Avg, Differential

The Product can measure minimum (MIN), maximum (MAX),
average (AVG), or differential (Δ) temperatures. The Product does
not show these values if a thermocouple is connected to it.

To turn on the Min/Max and Avg/Diff modes:

1. Push the Menu softkey until MnMx shows as the left softkey
and Avg shows as the right softkey.

2. Push the MnMx softkey and the Avg softkey.

Alarm

The Product has a programmable high and low temperature alarm
to assign high or low readings. When the alarm level is reached, an
alarm sounds and the display flashes orange and white.

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To set the high or low alarm:

1. Push the Menu softkey until Alarm shows as the right
softkey.

2. Push the Alarm softkey to access the Alarm menu.

3. Push the Hi or Lo softkey as necessary.

4. Push the ON or OFF softkey to turn the alarm on or off.

5. Use the Set softkey to access the Hi or Lo Alarm Set menu.

6. Use the down or up softkeys to change the alarm setting.

7. After the settings are completed, push the Done softkey.

Trigger Lock

The Product trigger can be locked on for continuous measurement.

To lock the trigger:

1. Push the Menu softkey until the lock symbol () shows as the
left softkey.

2. Push the  softkey to lock the trigger. The lock symbol shows
on the display. When the trigger is locked, the  softkey
changes to . Push this softkey to unlock the trigger.

Laser

The Product has a laser for aiming purposes only. The laser turns
off when the trigger is released.

To enable or disable the laser:

1. Push the Menu softkey until Laser shows as the right softkey.

2. Push the Laser softkey to enable or disable the laser.

 shows on the display when the laser is enabled.

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Infrared Thermometer

Display

Setup

From the Setup menu, the display language, backlight, and
time/date can be changed.

Language

To change the display language:

1. From the main menu, push the Menu softkey until Setup
shows as the left softkey.

2. Push the Setup softkey.

3. Use the down arrow softkey to move the indicator to
Language, and push the Enter softkey.

4. Use the down arrow to move the indicator to the correct
language.

5. Push the Enter softkey to complete the language selection, or
push the Back softkey to return to the Setup menu.

Backlight

The backlight is on by default. Turn the backlight off to conserve
battery power.

1. Push the Menu softkey until Setup shows as the left softkey.

2. Push the Setup softkey.

3. Push the Enter softkey to enter the backlight menu.

4. Push the OFF softkey to turn the backlight off, or push the ON
softkey to turn it on.

5. Push the Back softkey to return to the Setup Menu.

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Time/Date

To change the time on the Product:

1. Push the Menu softkey until Setup shows as the left softkey.

2. Push the Setup softkey to enter the Setup menu.

3. Push the down arrow softkey to select Time/Date.

4. Push the Enter softkey.

5. Push the Time softkey to set time.

a. Push the necessary time format (24hr or 12hr).

b. Use the up and down softkeys to select the correct hour.

c. Push Next to select the minutes.

d. Use the up and down softkeys to select the minute.

e. When in 12 hour mode, push the Next softkey to

highlight the am/pm parameter.

f. Use the up and down softkey to change to am or pm.

6. Push the Done softkey.

To change the date on the Product:

1. From the Time/Date menu, push the Date softkey.

2. Select the date format: Day/Month/Year (dmy) or
Month/Day/Year (mdy).

3. Use the up and down softkeys to select the correct parameter.

4. Push the Next softkey and the arrow softkeys to select the
month, date, or year parameters.

5. Use the up and down softkeys to set the necessary
parameter.

6. Push the Next softkey to move through each parameter.

7. Push the Done softkey.

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Infrared Thermometer

How the Product Works

Delete Data

To delete stored data from the Product, from the main menu, push
the Menu softkey until Mem shows as the left softkey function. The
last memory location shows on the display.

To access the Delete menu, push the Delete softkey.

• To delete all records, push the All softkey. At the confirmation

screen, push the Yes softkey.

• To delete individual records, push the View softkey and then

use the down and up arrow softkeys to access the necessary
record. When the correct record is shown, push the Yes
softkey to delete the record.

• To cancel data deletion, pull the trigger.

How the Product Works

The Product measures the surface temperature of an object. The
Product optics sense emitted, reflected, and transmitted energy,
which is collected and focused onto a detector. The Product
electronics translate the signal into a temperature measurement
which the Product shows on the display (see Figure 3).

Reflected energy

Emitted

Target

Transmitted

energy

Figure 3. How the Product Works

Energy

efh002f.eps

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Product Operation

Temperature Measurement

To measure temperature, point the Product at an object and pull
the trigger. You can use the laser pointer to help aiming. You can
also insert the KTC probe for contact measurement. Be sure to
consider distance-to-spot size ratio and field of view (see “Distance
and Spot Size” and “Field of View”).

Note

The laser is used for aiming purposes only and is not
related to temperature measurement.

The Product automatically powers down after 20 seconds of
inactivity. To turn the Product on, pull the trigger.

Find a Hot or Cold Spot

To find a hot or cold spot, aim the Product outside the necessary
area. Then, slowly scan across the area with an up and down
motion until the hot or cold spot is found (see Figure 4).

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Figure 4. Find a Hot or Cold Spot

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Infrared Thermometer

Product Operation

Distance and Spot Size

As the distance (D) from the object under measurement increases,
the spot size (S) of the area measured by the Product becomes
larger. The relationship between distance and spot size (D:S) is
shown in Figure 5. The spot sizes indicate 90 % encircled energy.

Figure 5. Distance and Spot Size

hhe06a.eps

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Field of View

When making measurements, make sure that the target is larger
than the Product spot size. The smaller the target, the closer you
should be to it (see Figure 6). For accurate measurement, it is
strongly recommended that the target size is at least twice as large
as the spot size.

Ye s No

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Figure 6. Field of View

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Infrared Thermometer

Product Operation

HOLD

After the trigger is released, the display retains its last infrared
measurement for 20 seconds. At the same time, HOLD shows on
the display. With the probe inserted, the contact Product stays on.
To freeze the infrared temperature when a probe is not inserted,
release the trigger until HOLD shows on the display.

Figure 7. Thermocouple Connection

hhe03.eps

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External Contact Probe

The Product has a bead KTC probe. The probe attaches to the
Product via the probe input located on the top of the Product (see
Figure 7).

With the probe installed, the probe symbol () shows on the
display. The probe can be used simultaneously when the Product
is making non-contact measurements. The probe measurements
are shown below the non-contact measurements. The Product
stays on when a probe is inserted.

Troubleshooting

See Table 4 for solutions to possible problems during Product
operation.

Table 4. Troubleshooting

Symptom Cause Action

--- (on display)



Blank display

Laser does not
work

Inaccuracy

Settings such as
emissivity,
date/time, F/C,
and saved data
lost

*For details about battery replacement, please refer to the separate Safety
Instructions.

Target temperature is over or
under range.
Low batteries Replace batteries*
Product is asleep
Possible dead batteries
Low or dead batteries
Ambient temperature is above
40 °C (104 °F)
Possible incorrect
emissivity setting, field of
view, or spot size

Battery dead or not replaced
in <1 minute of removal

Select target within
specifications

Pull trigger
Replace batteries*
Replace batteries*
Use in area with lower
ambient temperature
See “Emissivity”, “Field
of View” and “Distance
and Spot Size” sections.
Reset settings. Replace
batteries as soon as low
battery indicated;
Exchange the batteries
within one minute of
removal. *

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Infrared Thermometer

Maintenance

Maintenance

For detailed maintenance information, please refer to the separate
Safety Instructions.

Battery Replacement

For detailed information, please refer to the separate Safety
Instructions.

Clean the Lens

Use clean compressed air to blow off loose particles. Carefully
clean the surface with a water-moistened cotton swab.

Clean the Case

Use mild soap and water on a moist sponge or soft cloth.

Replacement Parts

See Table 5 for a list of replacement parts.

Table 5. Replacement Parts

Description Qty. Fluke Part Number

568 EX HOLSTER RED 1 4251170

568 EX LEATHER GRIP 1 4282316

568 EX HARDCASE RED 1 4334265

FLUKE 568 EX MANUAL 1 4326622

Battery AAA 1.5 V 2 2838018

Accessories

Optional accessories for the Product are 80PK-1 K-type
thermocouple probes (PN: 750422).

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Specifications

General Specifications

IR Temperature
Range

Accuracy

Repeatability

Display Resolution

-40 °C to 800 °C (-40 °F to 1472 °F)

<0 °C: ±(1.0 °C + 0.1 °/1 °C)
≥0 °C: ±1 % or ± 1.0 °C, whichever is greater

<32 °F: ±2 °F ±0.1 °/1 °F
≥32 °F: ±1 % or ±2 °F, whichever is greater
±0.5 % of reading or ±0.5 °C (1 °F), whichever is
greater.

0.1 °C / 0.1 °F

Spectral Response 8 μm to 14 μm

Response Time

KTC Input Range

KTC Input
Accuracy

<500 ms (95 %)

-270 °C to 1372 °C (-454 °F to 2501 °F)
<-40 °C: ±(1 °C + 0.2 °/1 °C)
≥-40 °C: ±1 % or 1 °C, whichever is greater

<-40 °F: ±(2 °F + 0.2 °/1 °F)
≥-40 °F: ±1 % or 2 °F, whichever is greater

KTC Resolution 0.1 °C/0.1 °F
Distance: Spot 50:1 (90 % energy)

Laser sighting

Emissivity

Data storage

Single laser, output <1 mW Class II,
wavelength 630 to 670 nm
Digitally adjustable from 0.10 to 1.00 by 0.01 or via
built-in table of common materials
99 points

Operating Altitude 2000 meters above mean sea level
Storage Altitude 12,000 meters above mean sea level

Relative Humidity

Operating
Temperature

10 % to 90 % RH non-condensing up to 30 °C
(86 °F)

0 °C to 50 °C (32 °F to 122 °F)

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Infrared Thermometer

Specifications

Storage
Temperature

-20 °C to 60 °C (-4 °F to 149 °F)

Vibration 2.5 G, IEC 68-2-6
Weight 0.322 kg (0.7099 lb)

Dimensions

Power

Battery Life

17.69 cm (6.965 in) H x 16.36 cm (6.441 in) L
x 5.18 cm (2.039 in) W

3 AAA /LR03 type-approved batteries.
(For a list of type-approved batteries, please refer to
the separate Safety Instructions.)
4 hours with laser and backlight on; 100 hours
with laser and backlight off, at 100 % duty cycle
(Product continuously on)

KTC Specifications

Only approved accessories can be used with the Product.
For details, please refer to the separate Safety
Instructions.

Measurement Range -40 °C to 260 °C (-40 °F to 500 °F)

Accuracy

Cable Length

Note

±1.1 °C (±2.0 °F) from 0 °C to 260 °C (32 °F to
500 °F). Typically within 1.1 °C (2.0 °F) from ­40 °C to 0 °C (-40 °F to 32 °F)

1 m (40 in) KTC cable with standard
miniature thermocouple connector and bead
termination

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