Fluke 566 User Manual

566/568

Users Manual

External Contact Probe

Warning

To avoid electrical shock or personal injury, do not connect the

external contact probe to live electrical circuits.

The thermometers come with a bead K-type thermocouple probe. The probes attach to the

thermometers via the probe input located on the top of the thermometer (see Figure 7).
With the probe installed, the probe symbol (A) appears on the display. The probe

can be used simultaneously while the thermometer is taking non-contact measurements.

The probe readings are shown below the non-contact measurements. The thermometer

will stay on when there is a probe inserted. When used with a personal computer and

FlukeView Forms (568 only), the auto off feature is disabled.

Troubleshooting

Use the following table to remedy possible problems when using the thermometer.

Table 4. Troubleshooting

Symptom Cause Action

--- (on display)

Target temperature is over or
under range.

Select target within
specifications

Low batteries

Replace Batteries

Blank display

Thermometer is asleep

Possible dead batteries

Pull trigger

Replace batteries

Laser does not work

Low or dead batteries

Ambient temperature is above
40

C (104

Replace batteries

Use in area with lower ambient
temperature

Failed communication via USB

Unit is off
FlukeView Forms is not running

Pull the trigger
Start FlukeView Forms

Inaccuracy

Possible incorrect emissivity
setting, field of view, or spot size

See “Emissivity”, “Field of View”
and “Distance and Spot Size”
sections.

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

Battery dead or not replaced in
<1 minute of removal

Reset settings. Replace
batteries as soon as low battery
indicated; Exchange the
batteries within one minute of
removal. Refer to “Changing the
Batteries”.