Extech Instruments EX503 User Manual
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Extech Instruments EX503 User Manual

Autoranging
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User's Guide
Autoranging Multimeter
Extech EX503

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Summary of Contents for Extech Instruments EX503

  • Page 1 User's Guide Autoranging Multimeter Extech EX503...
  • Page 2 Introduction Congratulations on your purchase of the Extech EX503 Autoranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Diode Test, and Continuity plus Thermocouple Temperature. It features a waterproof, rugged design for heavy duty use. Proper use and care of this meter will provide many years of reliable service.
  • Page 3  Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases  See that the batteries are not short-circuited. Do not throw batteries into the fire. EX503-en-GB_ v5.4 12/15...

  • Page 4: Safety Instructions

    NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. EX503-en-GB_ v5.4 12/15...

  • Page 5: Symbols And Annunciators

    (10 ) (amps) milli (10 ) (volts, amps) Amps kilo (10 ) (ohms) Farads (capacitance) mega (10 ) (ohms)  Ohms Hertz (frequency) Volts Percent (duty ratio) Relative Alternating current Auto Autoranging Direct current HOLD Display hold EX503-en-GB_ v5.4 12/15...

  • Page 6: Dc Voltage Measurements

    4. Read the voltage in the display. 5. Press the HZ/% button to indicate “Hz”. 6. Read the frequency in the display. 7. Press the Hz/% button again to indicate “%”. 8. Read the % of duty cycle in the display. EX503-en-GB_ v5.4 12/15...

  • Page 7: Dc Current Measurements

    10. Press the Hz/% button to indicate “Hz”. 11. Read the frequency in the display. 12. Press the Hz/% button again to indicate “%”. 13. Read the % duty cycle in the display. 14. Press the Hz/% button to return to current measurement. EX503-en-GB_ v5.4 12/15...

  • Page 8: Resistance Measurements

    4. Touch the test probes to the diode under test. Forward voltage will typically indicate 0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices will indicate near 0V and an open device will indicate “OL” in both polarities. EX503-en-GB_ v5.4 12/15...

  • Page 9: Capacitance Measurements

    Below are typical sensitivities for the “electrical” measurement modes. Range Sensitivity Frequency width ( DC/AC ) 5Hz~10kHz ≥1.5V rms 40V, 400V 5Hz~20kHz ≥10V rms 5Hz~200kHz ≥20V rms 1000V/1000V 50Hz~1kHz ≥420V rms 400mA 5Hz~5kHz ≥45mA rms 5Hz~1kHz ≥4A rms EX503-en-GB_ v5.4 12/15...

  • Page 10: Autoranging/Manual Range Selection

    The auto off feature will turn the meter off after 30 minutes. To disable the auto power off feature, hold down the MODE button and turn the meter on. LOW BATTERY INDICATION icon will appear in the display when the battery voltage becomes low. Replace the battery when this appears. EX503-en-GB_ v5.4 12/15...

  • Page 11: Maintenance

    Other Battery Safety Reminders Never dispose of batteries in a fire. Batteries may explode or leak. Never mix battery types. Always install new batteries of the same type. EX503-en-GB_ v5.4 12/15...

  • Page 12: Replacing The Fuses

    70-172-40], 10A/1000V fast blow for the 20A range [SIBA 50-199-06]). 6. Replace and secure the rear cover, battery and battery cover. WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in place and fastened securely. EX503-en-GB_ v5.4 12/15...

  • Page 13: Specifications

    NOTE: Accuracy is stated at 18 C to 28 C (65 F to 83 F) and less than 75% RH. Note: Accuracy specifications consist of two elements:  (% reading) – This is the accuracy of the measurement circuit. EX503-en-GB_ v5.4 12/15...
  • Page 14 61010-1 2 Edition (2004), and UL 61010B-2-031, 1 Edition (2003) Approvals UL CE UL Listed The UL mark does not indicate that this product has been evaluated for the accuracy of its readings. Copyright © 2013‐2015 FLIR Systems, Inc.  All rights reserved including the right of reproduction in whole or in part in any form  ISO‐9001 Certified  www.extech.com  EX503-en-GB_ v5.4 12/15...

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