Extech Instruments 450 User's Guide

User's GuideDigital Multimeterplus IR ThermometerExtech 450Patented

EX450-EU_ENG V3.1 10/0710NON-CONTACT TEMPERATURE MEASUREMENTS1. Set the function switch to the red IR Non-Contact ºC or ºF position.2. Point the meter

EX450-EU_ENG V3.1 10/0711DISPLAY BACKLIGHTPress and hold the HOLD key for >1 second to turn on or off the display backlight function.Note: The HOLD

EX450-EU_ENG V3.1 10/0712SpecificationsFunction Range Resolution AccuracyDC Voltage 200mV 0.1mV(0.5% reading + 2 digits)2V 0.001V(0.8% reading + 2 d

EX450-EU_ENG V3.1 10/0713Function Range Resolution AccuracyResistance200 0.1 (0.8% reading + 4 digits)2k 0.001k (0.8% reading + 2 digits)20k 0.

EX450-EU_ENG V3.1 10/0714MaintenanceWARNING: To avoid electrical shock, disconnect the meter from any circuit, remove thetest leads from the input ter

EX450-EU_ENG V3.1 10/0715REPLACING THE FUSESWARNING: To avoid electrical shock, disconnect the meter from any circuit, remove thetest leads from the i

EX450-EU_ENG V3.1 10/072IntroductionCongratulations on your purchase of the Extech 450 (part number EX450) AutorangingMultimeter plus IR Thermometer.

EX450-EU_ENG V3.1 10/073CAUTIONS Improper use of this meter can cause damage, shock, injury or death. Read andunderstand this user manual before oper

EX450-EU_ENG V3.1 10/074OVERVOLTAGE CATEGORY IIIThis meter meets the IEC 610-1-2001 standard for OVERVOLTAGE CATEGORY III. Cat IIImeters are protected

EX450-EU_ENG V3.1 10/075Controls and Jacks1. IR Thermometer and laser pointer2. 2000 count LCD display3. HOLD button4. SELECT button5. Function switch

EX450-EU_ENG V3.1 10/076Operating InstructionsWARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are verydangerous and should be m

EX450-EU_ENG V3.1 10/077AC VOLTAGE MEASUREMENTSWARNING: Risk of Electrocution. The probe tips may not be long enough to contact thelive parts inside s

EX450-EU_ENG V3.1 10/078AC CURRENT MEASUREMENTSCAUTION: Do not make current measurements on the 20A scale for longer than 30seconds. Exceeding 30 seco

EX450-EU_ENG V3.1 10/079CONTINUITY CHECKWARNING: To avoid electric shock, never measure continuity on circuits or wires thathave voltage on them.1. Se