Operation
18
Rev. A1 Jan 2015
3i Plus
Figure 3: Portable Thermometer with Scope
The portable thermometer has the following:
Trigger
: One-stage trigger, which activates the unit to take temperature readings.
Control Panel and Display
: All controls (except the trigger) are located on the control panel. The
display shows temperature and setup values, mode and operating information.
Mini USB Output
: Connects the instrument to the PC for downloading data or to DC Adaptor for
charging the battery.
Nose with Temperature Sensor inside
: Has the thermistor on the nose for high temperature
protection.
Sighting System
: Laser or red dot scope sighting is provided with each model for aiming. Note: Read
the laser warning label before operating the laser.
Polaroid Frame
: To adjust brightness of red dot scope.
5.3
Distance and Spot Size
As the distance (D) from the object being measured increases, the spot size (S) of the area measured by
the instrument becomes larger. For the relationship between distance and spot size (D:S), see section
3.2
Optical Charts
, page 14.
During measurements, please make sure that the target is larger than the instrument’s measurement
spot size at that distance. The smaller the target, the closer user should be to it.
Nose with Temperature
Sensor inside
Tripod Screw
Trigger
Battery Cover and Screw
USB Interface
Save Key
Return Key
3x Soft Keys
Red Dot Scope
Polaroid Frame
Scope Adjustable Screw
2 Laser Aperture
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