Extech Instruments EX430-NIST User Manual
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Extech Instruments EX430-NIST User Manual

Extech Instruments EX430-NIST User Manual

True rms multimeter
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USER MANUAL
True RMS Multimeter
Extech EX430A

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Summary of Contents for Extech Instruments EX430-NIST

  • Page 1 USER MANUAL True RMS Multimeter Extech EX430A...
  • Page 2 Introduction Congratulations on your purchase of the Extech EX430A True RMS Autoranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode Test, and Continuity plus Thermocouple Temperature. Proper use and care of this meter will provide many years of reliable service.
  • Page 3 CAUTIONS  Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter.  Always remove the test leads before replacing the battery or fuses.  Inspect the condition of the test leads and the meter itself for any damage before operating the meter.

  • Page 4: Overvoltage Category

    OVERVOLTAGE CATEGORY III This meter meets the IEC 61010-1 (EN 61010-1), 2010, 3 edition standard for OVERVOLTAGE CATEGORY III. Cat III meters are protected against overvoltage transients in fixed installation at the distribution level. Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation.
  • Page 5 Description 1. 4000 count LCD display 2. HOLD 3. SELECT button 4. Function switch 5. mA, uA and A input jacks 6. COM input jack 7. Positive input jack 8. RANGE hold button 9. RELATIVE button 10. Backlight button 11. Protective holster Note: Tilt stand and battery compartment are on rear of unit.

  • Page 6: Dc Voltage Measurements

    Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. 1. ALWAYS turn the function switch to the OFF position when the meter is not in use. 2. If “OL” appears in the display during a measurement, the value exceeds the range you have selected.

  • Page 7: Ac Voltage Measurements

    AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present.

  • Page 8: Ac Current Measurements

    AC CURRENT MEASUREMENTS CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. 1. Insert the black test lead banana plug into the negative COM jack. 2.

  • Page 9: Continuity Check

    CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. 1. Set the function switch to the green position. 2. Insert the black lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive ...

  • Page 10: Capacitance Measurements

    CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements. Remove the batteries and unplug the line cords. 1. Set the rotary function switch to the green position.

  • Page 11: Contact Temperature Measurements

    CONTACT TEMPERATURE MEASUREMENTS 1. Set the function switch to the black Type K ºC or ºF position. 2. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity. 3. Touch the Temperature Probe head to the part whose temperature you wish to measure.

  • Page 12: Auto Power Off

    HOLD The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or to exit the hold function. AUTO POWER OFF The auto off feature will turn the meter off after 15 minutes. LOW BATTERY INDICATION icon will appear in the lower left conner of the display when the battery voltage becomes low.

  • Page 13: Specifications

    Specifications Function Range Resolution Accuracy DC Voltage 400mV 0.1mV (0.3% reading + 2 digits) 0.001V (0.5% reading + 2 digits) 0.01V 400V 0.1V 600V (0.8% reading + 3 digits) AC Voltage 50 to 400Hz 400Hz to 1kHz (1.5% reading + 15 (2.5% reading + 15digits) 400mV 0.1mV...
  • Page 14 Function Range Resolution Accuracy Frequency 5.000Hz 0.001Hz (1.5% reading + 5 digits) 50.00Hz 0.01Hz 500.0Hz 0.1Hz 5.000kHz 0.001kHz (1.2% reading + 2 digits) 50.00kHz 0.01kHz 500.0kHz 0.1kHz 5.000MHz 0.001MHz (1.5% reading + 4 digits) 10.00MHz 0.01MHz Sensitivity: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5Vrms min @ 20% to 80% duty cycle and >...

  • Page 15: Maintenance

    Maintenance WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter with an open case. This MultiMeter is designed to provide years of dependable service, if the following care instructions are performed: 1.

  • Page 16: Replacing The Fuses

    REPLACING THE FUSES WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter with an open case. 1.

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Ex430a

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