Extech Instruments EX623 User Manual
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Extech Instruments EX623 User Manual

400amp true rms ac/dc clamp meter with ir thermometer
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User's Guide
400Amp True RMS AC/DC Clamp
Meter with IR Thermometer
Model EX623
Patented

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Summary of Contents for Extech Instruments EX623

  • Page 1 User's Guide 400Amp True RMS AC/DC Clamp Meter with IR Thermometer Model EX623 Patented...
  • Page 2 Introduction Congratulations on your purchase of this Extech EX623 True RMS Clamp Meter. This meter measures AC Current, DC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Diode Test, Duty Cycle and Continuity. Special features include Dual Input Thermocouple Temperature, Non-Contact IR Temperature and Non-Contact Voltage detector. The double molded case is designed for heavy duty use.
  • Page 3 Function Maximum Input A AC, 400A DC/AC A DC 400A DC/AC V DC, V AC 600V DC/AC Resistance, Capacitance, Frequency, Diode Test 250V DC/AC μA 4000 μA Type K Temperature 30V DC, 24V AC EX623 V2.2 07/08...
  • Page 4 Duty Ratio F and Fahrenheit and Celsius units (Temperature) Therocouple 1, Thermocouple 2, Thermocouple difference n, m, μ, M, k Unit of measure prefixes: nano, milli, micro, mega, and kilo • Continuity test Diode test Laser pointer EX623 V2.2 07/08...

  • Page 5: Operation

    NOTE: The detector is designed with high sensitivity. Static electricity or other sources of energy may randomly trip the sensor. This is normal operation. EX623 V2.2 07/08...
  • Page 6 Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Read the voltage value in the display. Frequency When ACA is selected, the measured frequency can be viewed in the lower display. EX623 V2.2 07/08...
  • Page 7 If one reading displays a value (typically 0.400V to 01.800V) and the other reading displays OL, the diode is good. If both readings display OL the device is open. If both readings are very small or ‘0’, the device is shorted. EX623 V2.2 07/08...
  • Page 8 Touch the red test probe tip to the other side of the device. Read the Frequency value on the upper large display. Read the Duty Ratio on the lower small display. Press the MODE button to display the Duty Ratio on the large display. EX623 V2.2 07/08...
  • Page 9 Press the T1-T2 button to step through the display combinations: Upper display Lower display T1-T2 T1- T2 Note: In case of an open input or a temperature overrange, the meter will display “- - - -” . EX623 V2.2 07/08...
  • Page 10 Steam, dust, smoke, etc. can obscure measurements. To find a hot spot, aim the meter outside the area of interest then scan across (in an up and down motion) until the hot spot is located. EX623 V2.2 07/08...
  • Page 11 APO is now disabled (APO icon is off) and will be reset when the Function switch is returned to the OFF position. Low battery indication When the icon appears in the display, the battery should be replaced. Refer to the battery replacement procedure in the maintenance section. EX623 V2.2 07/08...

  • Page 12: Maintenance

    Replace the rear cover and battery Warranty EXTECH INSTRUMENTS CORPORATION(a FLIR company) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.

  • Page 13: Specifications

    400.00nF 0.01nF ±(5.0% + 40 digits) 4000.0nF 0.1nF ±(3.0% + 10 digits) 400.00µF 0.01µF ±(3.5% + 10 digits) 4000.0µF 0.1µF ±(5.0% + 10 digits) 40.000mF 0.001mF Frequency 400.00Hz 0.01Hz ±(1.0% + 3 digits) (clamp) Sensitivity: 5Arms minimum EX623 V2.2 07/08...
  • Page 14 -58 to -4°F ±9°F/5°C -50 to -20°C -4 to 31°F ±2% of reading or ±4°F/2°C -20 to -1°C whichever is greater 0.1° 32°F ±2°F/1°C 0°C 33 to 518°F ±2% of reading or ±3°F/2°C 1 to 270°C whichever is greater EX623 V2.2 07/08...
  • Page 15 For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Copyright © 2008 Extech Instruments Corporation (a FLIR company) All rights reserved including the right of reproduction in whole or in part in any form.

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