Extech Instruments DT-8855 User Manual page 4

Descriptions
Meter Description
1. Laser pointer
2. IR sensor
3. Measurement trigger
4. Battery compartment
5. LCD display
6. Function buttons*
7. Thermocouple
8. Optical interface
(meter bottom)
9. Thermocouple input jacks (meter bottom)
*Function Buttons
•
MODE: Select from 9 modes of operation explained in detail in this user guide.
•
Arrows: For setting the emissivity, high/low alarm limits, and for scrolling
through the 20 internal memory locations
•
Backlight / Laser Pointer: For turning the LCD backlight and the Laser pointer
ON/OFF while taking measurements
•
USB: For turning the wireless PC communications ON/OFF
•
SET: For storing a reading to one of the 20 internal memories.
E
•
AT : Used during the Automatic Emissivity Adjustment procedure.
Note: The function button explanations above are simple overviews. For precise
instructions, please read the entire User Guide.
Internal Switches (inside battery compartment)
o
1. Temperature units ( C or
2. Test lock ON / OFF switch (OFF is the left position)
3. Alarm ON / OFF switch (OFF is the left position)
1
2
3
4
o o
F) switch ( C is the left position)
4
8
9
1
2
3
42560 V2.0 4/07