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Summary of Contents for Extech Instruments EX820A
- Page 1 User Manual 1000 A AC True RMS Clamp Meter with IR Thermometer MODEL EX820A...
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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............. 7 Display Icon Descriptions ..........7 Meter Power ...............8 Automatic Power Off (APO)........... - Page 3 Table of contents Battery Replacement..........22 6.2.1 Battery Safety ..........22 Specifications..............23 General Specifications..........23 Electrical Specifications ..........24 Measurement Specifications ........25 IR Thermometer Specifications........26 Customer Support............. 27 Warranty ................28 #NAS100175; r. AA/97099/97616; en-US...
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Page 5: Introduction
Introduction Congratulations on your purchase of the Extech EX820A CAT IV True RMS Clamp Meter. This meter measures AC Current, AC/DC Voltage, Resistance/ Continuity, Capacitance, Diode, Frequency, and Temperature (Type K and non-contact IR). The double molded case is designed for heavy duty use. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. -
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. •...
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Page 8: Maximum Input Ranges
Safety 2.3 Maximum Input Ranges Function Maximum Input AC Current 1000 A AC AC/DC Voltage 1000 V AC/DC AC/DC Voltage (LoZ) 600 V AC/DC Resistance, Capacitance, Frequency, Diode 250 V AC/DC Type K Temperature 60 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 Current clamp jaws Clamp opening trigger Backlight button Function switch Laser pointer button Control buttons (Section 3.1) Backlit LCD (Section 3.4) Negative test lead probe jack Positive test lead probe jack Figure 3.1 Meter Front. #NAS100175;... -
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. #NAS100175; r. AA/97099/97616; en-US... -
Page 11: Button Descriptions
Product Description 3.3 Button Descriptions With the function switch set to the IRT position, press and hold to scan surfa- ces with the laser pointer, and measure IR temperature. Release the button to switch off. LCD backlight button (located on the right side of meter). Press to switch the backlight on or off. -
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. The APO feature switches the meter OFF after approximately 30 minutes of inactivity. When the battery power is critically low, the battery icon appears. -
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 Automatic and Manual Range In the voltage, resistance, capacitance, and frequency modes, the meter auto- matically selects the optimum range. -
Page 14: Ac Current Clamp Measurements
3. Read the current value on the display. 5.5.1 Polarity Considerations When measuring from front to back on the EX820A, a minus (-) sign will pre- cede the displayed reading. When measuring from back to front, a positive (+) sign will precede the displayed reading. -
Page 15: Inrush Ac Current Measurements
Operation measured signal’s positive peak. Press the PEAK button again to step to the mode, the display will now show the negative peak. Press the PEAK but- ton again to exit this mode. 5.5.3 Inrush AC Current Measurements When measuring AC current you can capture inrush current. 1. -
Page 16: Ac/Dc Voltage And Loz Measurements
Operation 5.6 AC/DC Voltage and LoZ 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 5.2 AC/DC Voltage measurement test setup. 1. -
Page 17: Peak Max And Peak Min
Operation 3. Insert the black test lead plug into the negative COM jack. Insert the red test lead plug into the positive V jack. 4. 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. -
Page 18: Resistance Measurements
Operation 5.7 Resistance Measurements CAUTION Remove power from the device under test before making resistance measurements. Figure 5.3 Resistance measurement test 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 19: Continuity Test
Operation 5.8 Continuity Test CAUTION Remove power from the device under test before making continuity measurements. Figure 5.4 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 20: Diode Test
Operation 5.9 Diode Test CAUTION Remove power from the device under test before making diode measurements. Figure 5.5 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 21 Operation 5. The diode or junction can be evaluated as follows. If one reading is 0.400 V to 0.900 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).
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Page 22: Capacitance Measurements
Operation 5.10 Capacitance Measurements WARNING To avoid electric shock, discharge the capacitor before measuring. Figure 5.6 Capacitance test setup. 1. Rotate the function switch to the capacitance position 2. Use the MODE button to select the capacitance function. 3. Insert the black test lead plug into the negative COM jack. 4. -
Page 23: Type K Thermocouple Temperature Measurements
Operation 5.11 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 24: Non-Contact Ir Temperature Measurements
Operation 5.12 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 25: Ir Measurement Considerations
Operation Figure 5.9 Distance to Spot Ratio 8:1. 5.12.2 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 26: 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 27: Specifications
Specifications 7.1 General Specifications Display 6000 count (3–5/6 digits) backlit LCD Clamp jaw opening 43 mm (1.7 in.) 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 0 to 50℃... -
Page 28: Electrical Specifications
Specifications 7.2 Electrical Specifications Measurement rate 3 readings per second, nominal Input impedance 10 MΩ (Voltage AC/DC); 2.5 to 3.5 kΩ in LoZ mode. AC bandwidth 50 to 1000 Hz (AC voltage); 50/60 Hz (AC current) AC response True RMS (AC voltage and current) Supplied Type K;... -
Page 29: Measurement Specifications
Specifications 7.3 Measurement Specifications Function Range Resolution Accuracy (% of reading + digits) 600.0 A 0.1 A ±(2.5% + 8 digits) AC Current 50/60 Hz 1000 A 1.0 A ±(2.8% + 5 digits) True RMS AC Voltage 600.0 mV 0.1 mV ±(1.0% + 10 digits) 50/60 Hz 6.000 V... -
Page 30: Ir Thermometer Specifications
Specifications 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) 6.000 µF 0.001 µF 60.00 µF 0.01 µF 600.0 µF 0.1 µF ±(4.0% + 10 digits) 6.000 mF 0.001 mF ±(10.0% + 10 digits) -
Page 31: Customer Support
Customer Support Customer Support Local Telephone List: https://support.flir.com/contact Returns (RMA): https://customer.flir.com/Home #NAS100175; r. AA/97099/97616; en-US... -
Page 32: 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 34 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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