Fluke TIS20-9Hz User Manual - Page 25

Micro SD Memory Card, Temperature Measurement, To prevent personal injury, see emissivity

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Micro SD Memory Card To eject a Micro SD memory card, push in on the exposed edge of the card and then release. The card should pop partially out after you release it. Carefully pull the card out of the slot. To insert the Micro SD memory card, push the card in until it catches. The Micro SD memory card includes an SD adapter for insertion into a PC or multi-function card reader. For information about how to save data, see page 14. For information about how to view or erase a stored image, see page 29. Performance Series Thermal Imagers Micro SD Memory Card Temperature Measurement All objects radiate infrared energy. The quantity of energy radiated is based on the actual surface temperature and the surface emissivity of the object. The Imager senses the infrared energy from the surface of the object and uses this data to calculate an estimated temperature value. Many common objects and materials such as painted metal, wood, water, skin, and cloth are very good at radiating energy and it is easy to get relatively accurate measurements. For surfaces that are good at radiating energy (high emissivity), the emissivity factor is ≥90 % (or 0.90). This simplification does not work well on shiny surfaces or unpainted metals as they have an emissivity of

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Performance Series Thermal Imagers
Micro SD Memory Card
15
Micro SD Memory Card
To eject a Micro SD memory card, push in on the exposed
edge of the card and then release. The card should pop
partially out after you release it. Carefully pull the card out
of the slot.
To insert the Micro SD memory card, push the card in until
it catches.
The Micro SD memory card includes an SD adapter for
insertion into a PC or multi-function card reader.
For information about how to save data, see page 14. For
information about how to view or erase a stored image,
see page 29.
Temperature Measurement
All objects radiate infrared energy. The quantity of energy
radiated is based on the actual surface temperature and
the surface emissivity of the object. The Imager senses the
infrared energy from the surface of the object and uses
this data to calculate an estimated temperature value.
Many common objects and materials such as painted
metal, wood, water, skin, and cloth are very good at
radiating energy and it is easy to get relatively accurate
measurements. For surfaces that are good at radiating
energy (high emissivity), the emissivity factor is
≥
90 % (or
0.90). This simplification does not work well on shiny
surfaces or unpainted metals as they have an emissivity of
<
0.60. These materials are not good at radiating energy
and are classified as low emissivity. To more accurately
measure materials with a low emissivity, an emissivity
correction is necessary. Adjustment to the emissivity
setting will usually allow the Imager to calculate a more
accurate estimate of the actual temperature.
Warning
To prevent personal injury, see emissivity
information for actual temperatures. Reflective
objects result in lower than actual temperature
measurements. These objects pose a burn
hazard.
More information is available on emissivity at
and
. Fluke
recommends the study of this topic to get the most
accurate temperature measurements.