Testboy TV 328, Operating Instructions Manual

Page: 37 / 196

Operation
Testboy
®
TV 328 37
ENGLISH
IRT Technology
An infrared thermometer detects the infrared radiation that an object emits.
The sensor determines how much infrared radiation the object is giving off
and the internal microprocessor converts that reading into a
temperature reading. Using this method the thermometer can measure an
object’s temperature without touching the object. The laser-pointer builds a
circle and only used to aim the target.
Preparation
Do not subject the instrument to extreme temperature variations. This can
impair the accuracy of the instrument.
Avoid heavy impacts/dropping the instrument.
Avoid covering the temp/humidity sensor, infrared sensor or the laser
pointers.
Emissivity
The emissivity is a value that is used to describe a material's energy
radiation characteristic. The higher this value, the higher the ability of the
material is to send out radiation. Many organic materials and surfaces have
emissivity of approximately 0.95. Attached is a list of the emissivity values of
several materials. Metallic surfaces or shiny materials have low emissivity.
Therefore, the Testboy
®
TV 328 is fitted with an emissivity-setting feature.
Despite this adjustable emissivity setting feature, we do not recommend
taking measurements of shiny surfaces such as stainless steel. You will get
more precise measured values if you blacken or tape over the surface to be
measured. Measurements cannot be made through transparent surfaces,
like through glass for example. You will actually measure the surface
temperature of the glass instead.