Accounting For Emissivity - General Tools & Instruments IRT102 Manual Del Usuario

IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 5
Fig. 3. The Mode button provides
access to the IRT102's five advanced
measurement and selection modes
MAX - Displays the
maximum temperature
recorded during one
continuous measuring
session.
MIN - Displays the
minimum temperature
recorded during one
continuous measuring session.
LOCK - Measurement feature stays on without holding
Meas. and displays real time temperature readings. The
laser pointer automatically shuts off in this mode. (Note: The
Auto Power Off feature is disabled in this mode.)
°C/°F - Toggle between Fahrenheit and Celsius by pressing
the Meas. button.
- Press the Meas. button to choose the desired
emissivity level, then press Mode to return to measurement
mode. Upon restart, the emissivity value will return to the
factory default of 0.95.

ACCOUNTING FOR EMISSIVITY

Emissivity is the ability of an object to reflect or absorb IR
radiation (energy). Because the IRT102 measures the amount
of infrared energy emitted by a surface, the IRT's
measurements are most accurate when they take into
account the characteristic emissivity of the target material.
As a rule, the shinier the surface, the lower its emissivity.
The default emissivity setting of the IRT102 is 0.95.
The table on the next page lists the emissivities of many
common materials.
Press 1x
MAX
Press 5x
Press 4x
°C/°F
Press 2x
MIN
Press 3x
LOCK
5