Extech Instruments True RMS Multimeter Extech 430 User Manual

User's Guide True RMS Multimeter Extech 430 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176FAX 781.665.078

V01.02.01 7/04 10 DC CURRENT MEASUREMENTS CAUTION: Do not make current measurements on the 20A scale for longer than 30 seconds. Exceeding 30

V01.02.01 7/04 11 AC CURRENT MEASUREMENTS CAUTION: Do not make current measurements on the 20A scale for longer than 30 seconds. Exceeding 30

V01.02.01 7/04 12 RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitor

V01.02.01 7/04 13 CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. 1

V01.02.01 7/04 14 CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacito

V01.02.01 7/04 15 CONTACT TEMPERATURE MEASUREMENTS 1. Set the function switch to the black Type K ºF or ºC position. 2. Insert the Temperatur

V01.02.01 7/04 16 AUTORANGING/MANUAL RANGE SELECTION When the meter is first turned on, it automatically goes into AutoRanging. This automatica

V01.02.01 7/04 17 DISPLAY BACKLIGHT Press the key for to turn on or off the display backlight function. The backlight will automatically t

V01.02.01 7/04 18 Maintenance WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back

V01.02.01 7/04 19 BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing t

V01.02.01 7/04 2 Introduction Congratulations on your purchase of the Extech 430 (part number EX430) True RMS Autoranging Multimeter. This mete

V01.02.01 7/04 20 REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing th

V01.02.01 7/04 3 OVERVOLTAGE CATEGORY III This meter meets the IEC 610-1-95 standard for OVERVOLTAGE CATEGORY III. Cat III meters are protected

V01.02.01 7/04 4 Controls and Jacks 1. 4000 count LCD display 2. HOLD 3. SELECT button 4. Function switch 5. mA, uA and A input jacks 6. C

V01.02.01 7/04 5 Specifications Function Range Resolution Accuracy 400mV 0.1mV ±(0.3% reading + 2 digits) 4V 0.001V 40V 0.01V 400V 0.1V ±(0.

V01.02.01 7/04 6 Function Range Resolution Accuracy 400Ω 0.1Ω ±(0.8% reading + 4 digits) 4kΩ 0.001kΩ ±(0.8% reading + 2 digits) 40kΩ 0.01kΩ

V01.02.01 7/04 7 Diode Test Test current of 0.3mA maximum, open circuit voltage 1.5V DC typical Continuity Check Audible signal will sound if

V01.02.01 7/04 8 Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be

V01.02.01 7/04 9 AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts insid