User manual

Problem Possible Causes and Solutions
The IR probe does
not read what the IR
heat source
indicates
Emissivity is not the same as the IR probe and target. Adjust
the IR gun or use a look up table from the IR probe manufacturer.
Ice is on the target. Heat the unit above 5°C and remove the
water.
Ambient light may change the reading of the IR probe. Get
closer to the target. A channeling tube may remove some external
environmental factors.
The laser indicator (red dot) is not the actual surface center of
the IR probe (field of measurement). Check the proper use of
the instrument in the IR probe manual. The field of measurement
changes with distance.
There is a difference between the display temperature and
the IR heat source target (temperature gradient). The closer to
ambient the target is, the lower the error will be. See Figure 1,
Temperature Gradient Between Reference Probe and target
Surface.
IR probe is reading incorrectly (optic problems) or may be
within its given specifications (1-10°C). Check the heat source
with a known good IR probe.
IR heat source is out of calibration. Use an external reference.
11.2 Comments
11.2.1 EMC Directive
Fluke Hart Scientifics’ equipment has been tested to meet the European
Electromagnetic Compatibility Directive (EMC Directive, 89/336/EEC). The
Declaration of Conformity for your instrument lists the specific standards to
which the unit was tested.
11.2.2 Low Voltage Directive (Safety)
In order to comply with the European Low Voltage Directive (73/23/EEC),
Fluke Hart Scientific equipment has been designed to meet the I EC 1010-1
(EN 61010-1) and the I EC 1010-2-010 (E N 61010-2-010) standards.
43
11
Troubleshooting