Extech Instruments EX623A User Manual
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Extech Instruments EX623A User Manual

Extech Instruments EX623A User Manual

600 a true rms ac/dc clamp meter with ir thermometer
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User Manual
600 A True RMS AC/DC
Clamp Meter with IR
Thermometer
MODEL EX623A

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Summary of Contents for Extech Instruments EX623A

  • Page 1 User Manual 600 A True RMS AC/DC Clamp Meter with IR Thermometer MODEL EX623A...

  • Page 2: Table Of Contents

    Table of contents Introduction................1 Safety ................2 Safety Notes.............. 2 International Safety Symbols ......... 2 Maximum Input Ranges ..........4 FCC Compliance ............4 Product Description ............5 Meter Front ............... 5 Meter Back ............... 6 Button Descriptions............. 6 Display Icon Descriptions ..........7 Meter Power ...............8 Automatic Power Off (APO)...........
  • Page 3 Table of contents 5.15 Microampere (μA) AC/DC Current Measurements ... 22 5.16 Type K Thermocouple Temperature Measurements ............23 5.17 Non-Contact IR Temperature Measurements ....25 5.17.1 Distance to Spot Ratio ........25 5.17.2 IR Measurement Considerations ....... 26 Maintenance ..............27 Cleaning and Storage ..........

  • Page 5: Introduction

    Introduction Congratulations on your purchase of this Extech EX623A True RMS Clamp Meter. This meter measures AC/DC Current, AC/DC Voltage, Resistance/ Continuity, Capacitance, Diode, Frequency, Duty Cycle, and Temperature. Special features include two thermocouple inputs, a non-contact IR tempera- ture detector, and a non-contact voltage detector.

  • Page 6: Safety

    Safety 2.1 Safety Notes • Do not exceed the maximum input range for any function (see table in Sec- tion 2.3). • Do not apply voltage to the meter when the resistance, capacitance, or di- ode functions are selected. • Set the function switch OFF when the meter is not in use. 2.2 International Safety Symbols This symbol, adjacent to another symbol or terminal, indicates that the user must refer to the manual for further information.
  • Page 7 Safety CAUTION • For indoor use only. • 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 oper- ating the meter. Repair or replace any damage before use. •...

  • Page 8: Maximum Input Ranges

    Safety 2.3 Maximum Input Ranges Function Maximum Input AC/DC Current (A) 600 A AC/DC AC/DC Current (μA) 6000 μA AC/DC AC/DC Voltage and LoZ Voltage 600 V AC/DC Resistance, Capacitance, Frequency, Diode 250 V AC/DC Type K Temperature 30 V DC, 24 V AC 2.4 FCC Compliance This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.

  • Page 9: Product Description

    Product Description 3.1 Meter Front Refer to Figure 3.1 below for these numbered items. Non-contact voltage (NCV) detector Current clamp NCV LED indicator Clamp opening trigger Function switch Control buttons (Section 3.1) Backlit LCD (Section 3.4) Thermocouple input jacks Negative test lead jack 10.

  • Page 10: Meter Back

    Product Description 3.2 Meter Back Laser pointer lens IR temperature lens Battery and fuse compartment Compartment screw Figure 3.2 Meter Back. 3.3 Button Descriptions Press and hold to display the temperature of the targeted spot. Use the La- ser pointer for targeting. Release the button to exit. Data Hold Mode.

  • Page 11: Display Icon Descriptions

    Product Description Short press to select an alternate mode for the function in use. For example, use MODE to select AC or DC when measuring voltage or current. Long press to activate the DC current zero function. Temperature Display Mode: With a thermocouple connected to one or both inputs, choose the display configuration.

  • Page 12: Meter Power

    Meter Power The meter is powered by one (1) 9 V battery. The battery compartment is lo- cated on the back of the meter. When the battery power is critically low, the battery icon appears. Replace the battery when this icon appears. See the Maintenance section for battery replacement instructions.

  • Page 13: Operation

    Operation NOTE Read and understand all Warning and Caution statements in this user manual prior to use. Set the function switch to the OFF position when the meter is not in use. 5.1 Input Shutter Switch CAUTION The input shutter is an important safety feature. If it is damaged or inoperable, do not use the meter.

  • Page 14: Automatic And Manual Range

    Operation 5.2 Automatic and Manual Range In the voltage, resistance, capacitance, frequency, and μA current functions, the meter automatically selects the optimum range. To use manual range mode, follow the steps below. 1. Press the RANGE button. The AUTO display icon will switch off. 2.

  • Page 15: Non-Contact Voltage Detector

    Operation 5.6 Non-Contact Voltage Detector WARNING Risk of Electrocution. Before use, always test the voltage detector on a known live circuit to verify proper operation. Figure 5.2 Non-Contact Voltage measurements. 1. Remove the test leads from the meter. 2. Rotate the function switch to any measurement position. 3.

  • Page 16: Ac/Dc Current Clamp Measurements

    5.7.1 Polarity Considerations When measuring from front to back on the EX623A, a minus (-) sign will pre- cede the displayed reading. When measuring from back to front, a positive (+) sign will precede the displayed reading.

  • Page 17: Frequency Of Current Measurements

    Operation 5.7.2 Frequency of Current Measurements When measuring AC current, the measured frequency is shown on the lower area of the display. 5.7.3 Peak Max When measuring AC current, press the PEAK button to activate the peak cap- ture circuit. The display icon will appear at the top of the LCD.

  • Page 18: Ac/Dc Voltage Measurements

    Operation 5.8 AC/DC Voltage Measurements CAUTION Do not measure voltage if a motor on the circuit is being switched on or off. Large voltage surges may occur that can damage the meter. Figure 5.4 AC/DC Voltage measurement test setup. 1. Slide the input shutter switch to the up position. 2.

  • Page 19: Peak Max

    Operation 5.8.2 Peak Max When measuring AC voltage, press the PEAK button to activate the peak cap- ture circuit. The P-MAX display icon will appear at the top of the LCD. The me- ter will now display the measured signal’s peak. Press the PEAK button again to exit this mode.

  • Page 20: Resistance Measurements

    Operation 5.10 Resistance Measurements CAUTION Remove power from the device under test before making resistance measurements. Figure 5.5 Resistance measurement test setup. 1. Slide the input shutter to the up position. 2. Set the function switch to the Ω position. 3.

  • Page 21: Continuity Test

    Operation 5.11 Continuity Test CAUTION Remove power from the device under test before making continuity measurements. Figure 5.6 Continuity test setup. In the figure, the circuit is open, so the display shows OL. If the switch is closed, the circuit would be shorted and the meter’s audible beeper would sound. 1.

  • Page 22: Diode Test

    Operation 5.12 Diode Test CAUTION Remove power from the device under test before making diode measurements. Figure 5.7 Diode test setup. Take a measurement in both positions (1 and 2) as shown in the figure. Follow the instruction in this section to interpret the test results. 1.
  • Page 23 Operation 6. The diode or junction can be evaluated as follows. If one reading is 0.400 V to 0.800 V, and the other reading is OL, then the diode is good. If both readings are OL the device is bad (open). If both readings are very low or zero, the device is bad (shorted).

  • Page 24: Capacitance Measurements

    Operation 5.13 Capacitance Measurements WARNING To avoid electric shock, discharge the capacitor before measuring. Figure 5.8 Capacitance test setup. 1. Slide the input shutter to the up position. 2. Rotate the function switch to the capacitance position 3. Use the MODE button to select the capacitance function. 4.

  • Page 25: Frequency And Duty Cycle Measurements

    Operation 5.14 Frequency and Duty Cycle Measurements Figure 5.9 Frequency and Duty Cycle measurement setup. 1. Slide the input shutter to the up position. 2. Rotate the function switch to the Hz % position. 3. Insert the black test lead plug into the negative COM jack. Insert the red test lead plug into the positive Hz jack.

  • Page 26: Microampere (Μa) Ac/Dc Current Measurements

    Operation 5.15 Microampere (μA) AC/DC Current Measurements Figure 5.10 Microampere measurement test setup. 1. Slide the input shutter to the upper position. 2. Rotate the function switch to the μA position. 3. Press the MODE button to select AC or DC. 4.

  • Page 27: Type K Thermocouple Temperature Measurements

    Operation 5.16 Type K Thermocouple Temperature Measurements CAUTION The supplied thermocouple is rated for 482℉ (250℃) maximum. If a higher temperature range is needed, acquire a suitably rated thermocouple. If a higher temperature is meas- ured with the supplied probe, damage to the thermocouple and meter is possible. For an open input, the meter will display dashes (–...
  • Page 28 Operation Upper Display Lower Display Mode 1 Mode 2 Mode 3 T1 minus T2 Mode 4 T1 minus T2 #NAS100174; r. AA/97578/97616; en-US...

  • Page 29: Non-Contact Ir Temperature Measurements

    Operation 5.17 Non-Contact IR Temperature Measurements CAUTION Do not directly view or point the laser at an eye. Low power visible lasers do not normally present a hazard, but may present some potential for hazard if viewed directly for extended periods of time.

  • Page 30: Ir Measurement Considerations

    Operation Figure 5.13 Distance to Spot Ratio 8:1. 5.17.2 IR Measurement Considerations • If the surface of the object under test is covered with frost, oil, grime, etc., clean the area before taking measurements. • If an object's surface is highly reflective, apply masking tape or flat black paint to the surface before measuring.

  • Page 31: Maintenance

    Maintenance CAUTION To avoid electrical shock, disconnect the meter from the circuit under test, remove the test leads from the input terminals, and turn the function switch to the OFF position, before opening the case. Do not operate the meter with an open case. 6.1 Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent;...

  • Page 32: Specifications

    Specifications 7.1 General Specifications Display 6000 count (3–5/6 digits) backlit LCD Clamp jaw opening 1.25 in. 932 mm) approximately Over-range indication OL display Battery power One (1) 9 V battery (NEDA 1604) Low battery indication Battery symbol is displayed Auto Power Off (APO) After approximately 15 minutes of inactivity Operating temperature 32 to 122℉...

  • Page 33: Electrical Specifications

    Specifications 7.2 Electrical Specifications Measurement rate 3 readings per second, nominal Input impedance 10 MΩ (Voltage AC/DC) AC bandwidth 50 to 1000 Hz (AC voltage); 50/60 Hz (AC current) AC response True RMS (AC voltage and current) 3.0 in 60 A and 600 A ranges Crest Factor 1.4 in 1000 A range 50/60 Hz...

  • Page 34: Measurement Specifications

    Specifications 7.3 Measurement Specifications Function Range Resolution Accuracy (% of reading + digits) 40.00 A 0.01 A ±(1.5% + 5 digits) AC Current 50/60 Hz 40.01 to 60.00 A ±(2.8% + 5 digits) True RMS 400.0 A 0.1 A ±(1.5% + 5 digits) 400.1 to 600.0 A ±(2.8% + 5 digits) DC Current...
  • Page 35 Specifications Continuity Threshold 50 Ω (test current: < 0.9 mA Diode Test current: 1.5 mA, typical; Open circuit voltage: 3.2 V DC, typical Capacitance 6.000 nF 0.001 nF ±(5.0% + 30 digits) 60.00 nF 0.001 nF ±(5.0% + 20 digits) 600.0 nF 0.1 nF ±(3.0% + 5 digits)

  • Page 36: Ir Thermometer Specifications

    Specifications 7.4 IR Thermometer Specifications 6 to 16 µm IR Spectral Response IR Emissivity 0.95 (fixed) IR Distance to Spot ratio Laser pointer Class 2 laser < 1 mW power; Wavelength: 630 to 670 nm #NAS100174; r. AA/97578/97616; en-US...

  • Page 37: Customer Support

    Customer Support Customer Support Local Telephone List: https://support.flir.com/contact Returns (RMA): https://customer.flir.com/Home #NAS100174; r. AA/97578/97616; en-US...

  • Page 38: Warranty

    Warranty Teledyne FLIR warrants this Extech brand instrument to be free of defects in parts and workmanship for two years from date of shipment. To view the full warranty text, please visit the support site, link below. https://www.flir.com/support-center/warranty/ Manufacturer Address: Teledyne FLIR Commercial Systems, Inc.
  • Page 40 User Manual last page Website http://www.flir.com Customer support http://support.flir.com Copyright © 2024, FLIR Systems, Inc. All rights reserved worldwide. Disclaimer Specifications subject to change without further notice. Models and accessories subject to regional market considerations. License procedures may apply. Products described herein may be subject to US Export Regulations.

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