Pyle PIRT25 Operation Manual page 4

temperatures are to be measured followed by high temperature measurements, some time
(several minutes) is required after the low (and before the high) temperature measurements
are made.
This is a result of the cooling process which must take place for the IR sensor.
6. 6. 6. 6. BATTERY REPLACEMENT
BATTERY BATTERY REPLACEMENT BATTERY REPLACEMENT REPLACEMENT
① As battery power is not sufficient, LCD will display "
battery type 9V is required.
②
Open battery cover, then take out the battery from instrument and replace with a new
9-Volt battery and place the battery cover back.
7. NOTES: NOTES: NOTES: NOTES:
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How How it it it it Works How Works Works
How Works
Infrared thermometers measure the surface temperature of an object. The unit's optics
sense emitted , reflected, and transmitted energy, which is collected and focused onto a
detector. The unit's electronics translate the information into a temperature reading which is
display on the unit. In units with a laser, the laser is used for aiming purposes only.
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Field Field Field of of of of View View View
Field View
Make sure that the target is larger than the unit's spot size. The smaller the target, the closer
you should be to it. When accuracy is critical, make sure the target is at least twice as large
as the spot size.
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Distance Distance Distance Distance & & & & Spot Spot Spot Size Spot Size Size Size
As the distance (D) from the object increases, the spot size (S) of the area measured by the
unit becomes larger. See: Fig:
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Locating Locating Locating a a a a hot Locating hot hot hot Spot Spot Spot Spot
To find a hot spot aim the thermometer outside the area of interest, then scan across with an
up and down motion until you locate hot spot.
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Reminders Reminders Reminders Reminders
① Not recommended for use in measuring shiny or polished metal surfaces ( stainless steel,
aluminum, etc.).See Emissivity
② The unit cannot measure through transparent surfaces such as glass. It will measure the
surface temperature of the glass instead.
③Steam, dust, smoke, etc., can prevent accurate measurement by obstructing the unit's optics.
� � � � Emissivity
Emissivity Emissivity Emissivity
Fig: 1 1 1 1 . Fig: Fig:
Emissivity Emissivity
Emissivity
" replacement with one new