Fluke 561 - Infrared Thermometer Manual

Safety Information

A Warning identifies conditions and actions that pose hazards to the user. To avoid electrical shock or personal injury, follow these guidelines:

• Do not point laser directly at eye or indirectly off reflective surfaces.
• Before using the Thermometer inspect the case. Do not use the Thermometer if it appears damaged. Look for cracks or missing plastic.
• Replace the batteries as soon as the battery indicator ( ) appears.
• Do not use the Thermometer if it operates abnormally. Protection may be impaired. When in doubt, have the Thermometer serviced.
• Do not operate the Thermometer around explosive gas, vapor, or dust.
• Do not connect the optional external probe to live electrical circuits.
• 
  To avoid a burn hazard, remember that highly reflective objects will often result in lower than actual temperature measurements.
• If the Thermometer is used in a manner not specified by the manufacturer, the protection provided by the Thermometer may be impaired.

To avoid damaging the thermometer or the equipment under test protect them from the following:

• EMF (electro-magnetic fields) from arc welders, induction heaters, etc.
• Static electricity.
• Thermal shock (caused by large or abrupt ambient temperature changes- allow 30 minutes for the Thermometer to stabilize before use).
• Do not leave the Thermometer on or near objects of high temperature.

Table 1 and Figure 1 show various symbols and safety markings that are on the Thermometer and in this manual.

Figure 1. Symbols and Safety Markings

Table 1. Symbols

Symbol	Explanation
	Risk of danger. Important information. See Manual.
	Hazardous voltage. Risk of electrical shock.
	Warning. Laser.
	Conforms to requirements of European Union and European Free Trade Association (EFTA).
	Do not dispose of this product as unsorted municipal waste. Go to Fluke's web site for recycling information.
	Battery
	China metrology certification mark for measuring instruments manufactured in the Peoples Republic of China (PRC).

Features

The Thermometer includes:

• Single-spot Laser Sighting
• Backlit Display
• Hard Case
• Current Temperature Plus MIN, MAX, DIF Temperature Displays
• Easy Emissivity Selector
• Type-K Thermocouple
• Two AA Batteries

Thermometer features are shown in Figure 2.

Figure 2. Infrared Thermometer

Display

The primary temperature display reports the current or last IR temperature read until the 7second hold time elapses.
The secondary temperature display reports current thermocouple temperature when a type-K thermocouple is attached. When a thermocouple is not connected, the small temperature display reports a choice of maximum, minimum, or difference between maximum and minimum temperature.
You can toggle through the minimum, maximum, and difference IR temperatures anytime the display is on. The MIN, MAX, and DIF temperatures are constantly calculated and updated when the trigger is pressed. After the trigger is released, the MIN, MAX, DIF temperatures are held for 7 seconds.

Note
When the battery is low, appears on the display.
The last selection (MIN/MAX/DIF) is maintained on the secondary display even after the Thermometer has been turned off, providing the batteries have not failed.

	Laser "On" symbol
	SCAN or HOLD
	°C/°F symbol (Celsius/Fahrenheit)
	Primary temperature display
	Secondary temperature display
	Emissivity LO, MED, HI
	Temperature values for the MIN, MAX, DIF, KTC. KTC indicates the thermocouple temperature.
	Low Battery symbol. Appears when the battery charge is <25%.

Buttons and Connector

Button/ Connector	Description
	Press and then press to toggle between the MIN, MAX, and DIF options.
	The button is used to show the MIN, MAX, and DIF functions in the secondary display, whichever was pressed most recently.
	Selects the emissivity setting. You can toggle between LO (0.3), MED (0.7), or HI (0.95) using .
	K-type thermocouple probe used to make contact temperature measurement.

How the Device Works

Infrared thermometers measure the surface temperature of an opaque object. The Thermometer's optics sense infrared energy, which is collected and focused onto a detector. The Thermometer's electronics then translate the information into a displayed temperature reading which appears on the display. The laser is used for aiming purposes only.

Operating the Device

The Thermometer turns on when you press the trigger. The Thermometer turns off when no activity is detected for 7 seconds.
To measure temperature, aim the Thermometer at the target, pull and hold the trigger. Release the trigger to hold a temperature reading.
Be sure to consider distance-to-spot size ratio and field of view. The laser is used for aiming only.

Locating a Hot or Cold Spot

To find a hot or cold spot, aim the Thermometer outside the target area. Then, slowly scan across the area with an up and down motion until you locate the hot or cold spot.

Distance and Spot Size

As the distance (D) from the target being measured increases, the spot size (S) of the area measured by the unit becomes larger. The spot sizes indicates 90% encircled energy. The maximum D:S is obtained when the Thermometer is 900 mm (36 in) from the target resulting in a spot size of 75 mm (3 in).

Field of View

Make sure that the target is larger than the spot size. The smaller the target, the closer you should be to it.

Emissivity

Emissivity describes the energy-emitting characteristics of materials. Most organic materials and painted or oxidized surfaces have an emissivity of about 0.95.

If possible, to compensate for inaccurate readings that may result from measuring shiny metal surfaces, cover the surface to be measured with masking tape or flat black paint (<148°C/300°F) and use the high emissivity setting. Allow time for the tape or paint to reach the same temperature as the surface beneath it. Measure the temperature of the tape or painted surface.

If you cannot paint or use tape, then you can improve the accuracy of your measurements with the emissivity selector. Even with the emissivity selector, it can be difficult to get a completely accurate infrared measurement of a target with a shiny or metallic surface. Experimentation, using the probe to determine benchmark temperatures, and experience will help you choose the best setting for specific measurements.

The Thermometer has three emissivity settings: low (0.3), medium (0.7), and high (0.95). Refer to Table 2. The reference to emissivity settings in the table are suggestions for typical situations. Your particular situation may differ.

Table 2. Surface Emissivity

Switching Between °C and °F

Open the battery compartment and locate the switch positioned between the left side of the battery near the Thermometer wall. To toggle between °C and °F, use a small screwdriver or paper clip to move the switch to the desired position.

Using the Temperature Probe

To avoid electrical shock or personal injury, do not connect the optional external probe to live electrical circuits.

Connect the probe to the input on the top of the Thermometer. The probe temperature and KTC appears in the secondary display. The live infrared temperature continues to show in the primary display. Connect the temperature probe as shown in Figure below.

Connecting the Temperature Probe

Note
With the probe inserted, the Thermometer stays on for 10 minutes (with laser off) after the trigger is released.

Table 3 lists recommended Fluke temperature probes for use with the Thermometer:

Table 3. Recommended Temperature Probes

HOLD

The display will remain activated for 7 seconds after the trigger is released. HOLD appears in the upper middle of the display. When the trigger is pulled again, the Thermometer will begin measuring in the last function selected.

Maintenance

Changing the Battery

To install or change the two AA batteries, open the battery compartment and insert the batteries as shown in Figure 2.

Cleaning the Lens

Blow off loose particles using clean compressed air. Carefully wipe the surface with a moist cotton swab. The swab may be moistened with water.

Cleaning the Housing

Use soap and water on a damp sponge or soft cloth.

To avoid damaging the Thermometer, do NOT submerge it in water.

Troubleshooting

Symptom	Problem	Action
(on display)	Target temperature is over or under range	Select target within specifications
	Low battery	Replace battery
Blank display	Possible dead battery	Check and/or replace battery
Laser does not work	Low or dead battery Ambient temperature above 40°C (104°F)	Replace battery Use in area with lower ambient temperature

CE Certification

The Thermometer conforms to the following standards:

• EN61326-1 EMC Standard
• EN61010-1 Safety Standard
• EN60825-1 Laser Standard

Certification testing was conducted using a frequency range of 80 to 1000 MHz with the instrument in three orientations.

Specifications

© 2006-2008 Fluke Corporation, All rights reserved. Printed in China. Specifications are subject to change without notice. All product names are trademarks of their respective companies.

Documents / Resources

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