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ratio of the thermal radiation from a surface to the radiation from an
ideal black body surface at the same temperature as given by the
Stefan–Boltzmann law.
Refer to table 1 for the nominal surface emissivity values for various
materials.
Table 1
Material Value Material Value
Aluminium * 0.30 Leather *** 0.78
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 Snow 0.83
Glass (plate) 0.85 Skin (human) 0.98
Iron * 0.70 Water 0.93
Ice 0.97 Wood *** 0.94
* Oxidized ** Opaque, over 20 mils *** Natural
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4. MAINTENANCE
4.1 Battery Replacement
The battery compartment is in the handle
of the unit.
Remove the battery cover screw and the
battery cover.
Replace with 3 new 1.5V, AA alkaline
batteries (IEC LR6, NEDA 15A), observing
correct polarity.
Replace the battery cover and screw.
Note: Do not mix old and new batteries.
4.2 Calibration
To maintain the integrity of measurements
made using your instrument, Martindale Electric recommends
that it is returned at least once a year to an approved Calibration
Laboratory for recalibration and certification.
Martindale Electric is pleased to offer you this service. Please
contact our Service Department for details.
Tel: 01923 650660
4.3 Cleaning
If contamination is found, clean with a damp soft cloth and if
necessary a mild detergent or alcohol. If required use a cotton
bud to clean the lens. Do not use abrasives, abrasive solvents, or
detergents which can cause damage to the unit. If a mild detergent
is used, the unit should subsequently be thoroughly cleaned with a
water dampened soft cloth. After cleaning, dry and allow to remain
in a dry environment for 2 hours before use.
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4.4 Repair & Service
There are no user serviceable parts in this unit other than those
that may be described in section 4. Return to Martindale Electric
if faulty. Our service department will quote promptly to repair any
fault that occurs outside the guarantee period.
Before the unit is returned, please ensure that you have checked
the unit and batteries.
4.5 Storage Conditions
The instrument should be kept in warm dry conditions away from
direct sources of heat or sunlight, and in such a manner as to
preserve the working life of the unit. It is strongly advised that the
unit is not kept in a tool box where other tools may damage it.
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5. WARRANTY AND LIMITATION OF LIABILITY
This Martindale product is warranted to be free from defects in
material and workmanship under normal use and service. The
warranty period is 2 years and begins on the date of receipt by the
end user. This warranty extends only to the original buyer or end-
user customer, and does not apply to fuses, disposable batteries,
test leads or to any product which, in Martindale’s opinion, has been
misused, altered, neglected, contaminated, or damaged by accident or
abnormal conditions of operation, handling or storage.
Martindale authorised resellers shall extend this warranty on new and
unused products to end-user customers only but have no authority to
extend a greater or different warranty on behalf of Martindale.
Martindale’s warranty obligation is limited, at Martindale’s option, to
refund of the purchase price, free of charge repair, or replacement of
a defective product which is returned to Martindale within the warranty
period.
This warranty is the buyer’s sole and exclusive remedy and is in lieu
of all other warranties, expressed or implied, including but not limited
to any implied warranty of merchantability or fitness for a particular
purpose. Martindale shall not be liable for any special, indirect,
incidental or consequential damages or losses, including loss of data,
arising from any cause or theory.
Since some jurisdictions do not allow limitation of the term of
an implied warranty, or exclusion or limitation of incidental or
consequential damages, the limitations and exclusions of this warranty
may not apply to every buyer. If any part of any provision of this
warranty is held invalid or unenforceable by a court or other decision-
maker of competent jurisdiction, such holding will not affect the validity
or enforceability of any other provision or other part of that provision.
Nothing in this statement reduces your statutory rights.
