Extech Instruments EX520A User Manual
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Extech Instruments EX520A User Manual

Extech Instruments EX520A User Manual

True rms industrial multimeter
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True RMS Industrial
Multimeter
MODEL EX520A

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Summary of Contents for Extech Instruments EX520A

  • Page 1 User Manual True RMS Industrial Multimeter MODEL EX520A...

  • Page 2: Table Of Contents

    Table of contents Introduction................1 Safety ................2 International Safety Symbols ......... 3 Input Protection Limits ..........3 FCC Compliance ............4 Product Description ............5 Meter Front ............... 5 Meter Back ............... 6 Button Descriptions............. 7 Display Description ............. 8 Meter Power ...............9 Automatic Power Off (APO)...........
  • Page 3 Table of contents 5.17 Type K Thermocouple Temperature Measurements ............25 Maintenance ..............26 Cleaning and Storage ..........26 Battery Replacement..........27 Fuse Replacement............ 28 Specifications..............29 General Specifications..........29 Electrical Specifications ..........30 Measurement Specifications ........30 Customer Support............. 34 Warranty ................

  • Page 5: Introduction

    Introduction Congratulations on your purchase of the Extech EX520A True RMS Industrial Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resist- ance/Continuity, Capacitance, Frequency (electrical and electronic), Duty Cycle, Diode, and Temperature. Special features include a low impedance (LoZ) voltage measurement mode to eliminate ghost voltages, and a low pass filter (LPF) for use on variable fre- quency drives (VFD).

  • Page 6: Safety

    Safety The following safety information must be observed to ensure maximum per- sonal safety while operating this meter. WARNING • Improper use of this meter can cause damage, shock, injury or death. Read and under- stand this user manual before operating the meter. •...

  • Page 7: International Safety Symbols

    Safety 2.1 International Safety Symbols This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the operat- ing instructions to avoid personal injury or damage to the meter. This symbol adjacent to one or more terminals identifies them as being associated with ranges that may, in normal use, be subjected to particularly hazardous voltages.

  • Page 8: Fcc Compliance

    Safety 2.3 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. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 9: Product Description

    Product Description 3.1 Meter Front LCD (6000 count) with backlight and bar graph. Control buttons (Section 3.3). Function switch. 10 A positive test lead input. µA and mA positive test lead input. Voltage, frequency, duty cycle, resist- ance, diode, continuity, capacitance, temperature positive test lead input.

  • Page 10: Meter Back

    Product Description 3.2 Meter Back Lanyard hole. Screws (silver) that secure housing (re- move to access fuses). Test lead holders. One of the two screws (black) that se- cures the battery compartment. Tilt stand. Battery compartment. Screws (silver) that secure housing (lift tilt stand to access them).

  • Page 11: Button Descriptions

    Product Description 3.3 Button Descriptions Long press LPF to introduce the low pass filter (LPF). Long press again to exit. Use this mode when measuring variable frequency drives (VFD). Short press MODE select an alternate mode for the function in use (see list of operations below).

  • Page 12: Display Description

    Product Description 3.4 Display Description Automatic range. Data Hold. Measurement reading. Maximum and Minimum readings. Relative (zero). Diode test. Continuity test. Low Pass Filter. Low impedance. Figure 3.3 Display Description 10. Unit of measure and range prefixes. 11. Bar graph (arrow on the right of the graph indicates over- range condition).

  • Page 13: 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 (under the tilt stand) secured by the two black Phillips screws. When the battery power is critically low, the battery icon appears. Replace the battery when this icon appears.

  • Page 14: 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. On some low AC and DC voltage ranges, with the test leads not connected to a device under test, the display may show a random, changing reading.

  • Page 15: Lcd Backlight

    Operation 5.3 LCD Backlight The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Long press the backlight button to switch the backlight on or off. The backlight automatically switches off after 5 minutes. 5.4 Maximum and Minimum Readings Note: When using the MAX/MIN function in Auto Range mode, the range that is active when the MAX/MIN button is pressed will be locked.

  • Page 16: Data Hold

    Operation 5.6 Data Hold To freeze the displayed reading, press the HOLD button, the HOLD icon will appear. Press the HOLD button to return to normal operation. 5.7 Low Pass Filter (LPF) Long press the LPF button to engage the low pass filter circuit. Three beeps indicate that the mode is active.

  • Page 17: Ac/Dc Voltage (Frequency, Duty Cycle) Measurements

    Operation 5.8 AC/DC Voltage (Frequency, Duty Cycle) 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. WARNING Some test lead probe tips may not be long enough to reach the live parts inside some volt- age outlets (especially 240 V outlets) because the contacts are recessed deep in the out- lets.

  • Page 18: Frequency And Duty Cycle Of Ac Voltage Measurements

    Operation 5.8.1 Frequency and Duty Cycle of AC Voltage Measurements When measuring AC voltage, press the Hz % button to show the frequency (Hz), press again to show the duty cycle % of the measurement, and press a third time to return to the normal AC voltage display. #NAS100179;...

  • Page 19: Low Impedance (Loz) Voltage Measurements

    Operation 5.9 Low Impedance (LoZ) 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. WARNING Some test lead probe tips may not be long enough to reach the live parts inside some volt- age outlets (especially 240 V outlets) because the contacts are recessed deep in the out- lets.

  • Page 20: Ac/Dc Current Measurements

    Operation 5.10 10 A AC/DC Current Measurements WARNING Do not make 10 A current measurements for longer than 30 seconds. Exceeding 30 sec- onds may cause damage to the meter and/or the test leads. Figure 5.2 10 A AC/DC Current measurement setup. 1.

  • Page 21: Μa, Ma Ac/Dc Current Measurements

    Operation 5.11 µA, mA AC/DC Current Measurements WARNING For current measurements up to 6000 µA, set the function switch to the µA position and in- sert the red test lead banana plug into the µA/mA jack. For current measurements up to 600 mA, set the function switch to the mA position and in- sert the red test lead banana plug into the µA/mA jack.

  • Page 22: Frequency And Duty Cycle Of Μa And Ma Ac Current Measurements

    Operation 5.11.1 Frequency and Duty Cycle of µA and mA AC Current Measurements When measuring in the µA and mA AC current ranges, press the Hz % button to show the frequency (Hz), press again to show the duty cycle % of the measurement, and press a third time to return to the normal AC current display.

  • Page 23: Resistance Measurements

    Operation 5.12 Resistance Measurements WARNING To avoid electric shock, disconnect power to the unit under test and discharge all capaci- tors before taking resistance measurements. Figure 5.4 Resistance measurement setup. 1. Set the function switch to the Ω position. 2. If the resistance mode is not selected, use the MODE button to select it. 3.

  • Page 24: Continuity Test

    Operation 5.13 Continuity Test WARNING To avoid electric shock, never measure continuity on circuits or wires that have voltage present. Figure 5.5 Continuity test setup. In the figure, the circuit is open, so the display shows OL. If the switch is closed, the circuit will short and a steady tone will sound. 1.

  • Page 25: Diode Test

    Operation 5.14 Diode Test WARNING To avoid electric shock, never perform diode tests on components or circuits that have volt- age present. NOTE The value indicated on the display during diode tests is the forward bias voltage. Figure 5.6 Diode test setup. Take a measurement in both positions (1 and 2) as shown in the figure.
  • Page 26 Operation 6. The diode or junction can be evaluated as follows. If one reading is between 0.400 V and 0.700 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 27: Capacitance Measurements

    Operation 5.15 Capacitance Measurements WARNING To avoid electric shock, disconnect power to the unit under test and discharge all capaci- tors before taking capacitance measurements. Figure 5.7 Capacitance test setup. 1. Rotate the function switch to the capacitance position 2. Use the MODE button to select the capacitance function. 3.

  • Page 28: Frequency And Duty Cycle Measurements (Electronic)

    Operation 5.16 Frequency and Duty Cycle Measurements (Electronic) WARNING This section applies to low voltage electronic frequency measurements. To measure high voltage frequency and duty cycle, refer to Section 5.7, Voltage Measurements, above. Figure 5.8 Frequency test setup. 1. Rotate the function switch to the Hz % position 2.

  • Page 29: Type K Thermocouple Temperature Measurements

    Operation 5.17 Type K Thermocouple Temperature Measurements CAUTION The supplied thermocouple is rated for 250℃ (482℉) 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 30: 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. Keep the meter dry.

  • Page 31: Battery Replacement

    Maintenance 6.2 Battery Replacement WARNING To avoid electric shock, disconnect the test leads from any source of voltage before open- ing the meter. Remove the test leads from the meter before replacing the battery or fuses. Expired or damaged batteries can cause cauterization on contact with the skin. Always use suitable hand protection when handling such batteries.

  • Page 32: Fuse Replacement

    Maintenance 6.3 Fuse Replacement WARNING To avoid electric shock, disconnect the test leads from any source of voltage before open- ing the meter. Remove the test leads from the meter before replacing the battery or fuses. Never operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely.

  • Page 33: Specifications

    Specifications 7.1 General Specifications Enclosure Double moulded waterproof housing. IP67 rated, tested by Bu- reau Veritas (BV) Drop test 2 m (6.6 ft.) Display 6000 count (3–5/6 digits) backlit LCD with multifunction indicators Over-range indication OL display Measurement rate 3 readings per second, nominal Battery power One (1) 9 V battery (NEDA 1604 IEC 6F22) Low battery indication...

  • Page 34: Electrical Specifications

    Specifications 7.2 Electrical Specifications Fuse types 800 mA (1000 V) ceramic fast blow for the 600 mA range. 10 A (1000 V) ceramic fast blow for the 10 A range. Input impedance > 10 MΩ (Voltage AC/DC) AC bandwidth 40 to 1000 Hz (AC voltage); 50/60 Hz (AC current) AC response True RMS (AC voltage and current) Crest Factor...
  • Page 35 Specifications DC Current 600.0 µA 0.1 µA (Auto Range) 6000 µA 1.0 µA 60.00 mA 0.01 mA ±(1.0% + 3 digits) 600.0 mA 0.1 mA 6.000 A 0.001 A 10.00 A 0.01 A Notes: Overload protection: 800 mA / 1000 V and 10 A / 1000 V fused.
  • Page 36 Specifications Capacitance 60.00 nF 0.01 nF ±(5.0% + 30 digits) 600.0 nF 0.1 nF 6.000 µF 0.001 µF ±(3.0% + 5 digits) 60.00 µF 0.01 µF 600.0 µF 0.1 µF ±(5.0% + 5 digits) 6.000 mF 0.001 mF ±(10.0% + 10 digits) 60.00 mF 0.01 mF 99.99 mF...
  • Page 37 Specifications Diode test Test current: 1.5 mA 0.001 V ± (10.0% + 5 digits) max. Open circuit voltage: 3.2 V DC typical. Overload protection: 600 V DC or AC RMS. Continuity Audible threshold: < 50 Ω. Test current: < 0.9 mA. Overload protection: 600 V DC or AC RMS.

  • Page 38: Customer Support

    Customer Support Customer Support Local Telephone List: https://support.flir.com/contact Returns (RMA): https://customer.flir.com/Home #NAS100179; r. AA/97576/97580; en-US...

  • Page 39: Warranty

    Warranty Teledyne FLIR warrants this Extech brand instrument to be free of defects in parts and workmanship for three 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 #NAS100179; r. AA/97576/97580; en-US...
  • Page 42 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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