Extech Instruments IR250 User Manual

IR250 V2.0 6/09 3
Descriptions
Meter Description
1. Laser pointer
2. IR sensor
3. Measurement trigger
4. LCD display
5. Function buttons*
6. Battery compartment
Function Buttons
• Max/Min: Select Max or Minimum display.
• °C/°F: Select temperature units
• Backlight / Laser Pointer: For turning the LCD backlight or the Laser pointer
ON/OFF
Display Description
1. Displays SCAN when trigger is depressed;
2. Displays HOLD when trigger is released
3. Laser pointer ON
4. Emmisivity setting (0.95)
5. Temperature units
6. Low battery
7. Max/Min display
8. Temperature display

Extech Instruments IR250 Specifications

Temperature Measurement

temperature range	-20 to 260°C (-4 to 500°F)
temperature resolution	0.1°
temperature accuracy	-20°C to -7°C (-4 to 20°F): ±4°C (7.5°F); -7°C to 260°C (20 to 500°F): ±3% of reading or ±2.5°C /5°F (whichever is greater)
emissivity	Fixed 0.95

Display

display type	Backlit LCD display with function indicators
display update rate	Less than 1 second

Operating Environment

operating temperature	0°C to 50°C (32°F to 122°F)
operating humidity	80% Relative Humidity max.

Power

power supply	9V battery
automatic power off	Meter shuts off automatically after 8 seconds

Weight and Dimensions

weight	125g (4.4 oz)
dimensions	80x31.7x137mm (3.15 x 1.25 x 5.4”)