Related Manuals for Extech Instruments EX650
Summary of Contents for Extech Instruments EX650
- Page 1 USER GUIDE 600A True RMS Digital Clamp Meters EX650 Series EX650 True RMS 600A AC Digital Clamp Meter EX655 True RMS 600A AC/DC Clamp Meter with Temperature, Inrush, and Low Pass Filter ...
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Page 2: Table Of Contents
Table of Contents 1. INTRODUCTION 3 2. SAFETY INFORMATION 4 3. DESCRIPTIONS 6 4. OPERATION 11 Powering the Meter Disable Auto Power OFF Display Backlight Work Light Data Hold Test Lead Considerations Voltage Measurements ‘Lo Z’ AC Voltage Measurements Current Measurements Using the Clamp µA AC/DC Current Measurements using Test Leads Non‐Contact Voltage Detector Resistance Measurements Continuity Measurements Capacitance Measurements ... -
Page 3: Introduction
1. Introduction Thank you for selecting the Extech EX650 Series Clamp Meter. The EX650 is a feature‐packed True RMS digital Clamp meter series with 6000 count backlit display and automatic ranging. Measure AC/DC voltage, AC current, DC current (EX655), Inrush current (EX655), Resistance, Diode, Continuity, Capacitance, Temperature (EX655), Lo ‘Z’ low impedance mode, and Frequency (EX655). Other functions include Data Hold, Maximum/Minimum Memory, Relative mode, Low Pass Filter (LPF) for Variable Frequency Drive signals (EX655), Work light, NCV (Non‐Contact Volt Detection), and Auto power‐off. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of this User Guide, Product Updates, Product Registration, and Customer Support. Features 6000 count digital display 60 segment analog bar graph display on EX655 model Large backlit LED display True RMS AC measurements Lo Z mode eliminates ghost voltage readings on non‐energized circuits Auto and Manual Range modes 0.5% DCV accuracy Data Hold Inrush current mode on EX655 model Relative mode ... -
Page 4: Safety Information
2. Safety Information To ensure the safe operation and service of the meter, follow these instructions closely. Failure to observe warnings can result in severe injury. WARNINGS WARNINGS identify hazardous conditions and actions that could cause BODILY HARM or DEATH. When handling test leads or probes, keep hands and fingers behind the finger guards at all times. To avoid electrical shock do not touch exposed electrical wire, connectors, unused input terminals, or circuits under test. Remove test leads from the meter before opening the battery compartment or meter housing. Use the meter only as specified in this User Guide or accompanying Quick Start to avoid compromising the protections provided by the meter. Be sure to use the proper terminals, switch positions, and ranges when taking measurements. Verify the meter’s operation by measuring a known voltage. Have the meter serviced if the meter responds unusually or if there are questions regarding the meter’s functional integrity. Do not apply more than the rated voltage, as marked on the meter, between terminals or between any terminal and earth ground. Do not measure voltages above 1000VDC or 750V AC between terminal and ground to prevent electrical shock and damage to the Clamp meter. Use caution working with voltages above 30 VAC RMS, 42 VAC peak, or 60 VDC. These voltages pose a shock hazard. To avoid misleading readings that could lead to electric shock and injury, replace the batteries as soon as the low battery indicator is displayed. Disconnect power to the circuit under test and discharge all high‐voltage capacitors before testing resistance, continuity, diodes, or capacitance. Do not use the meter in the presence of explosive gas or vapor. To reduce risk of fire or electric shock, do not use the meter if it is wet and do not expose the meter to moisture. ... - Page 5 Safety Symbols that are typically marked on meters and instructions This symbol, adjacent to another symbol, indicates the user must refer to the manual or user guide for further information. Risk of electrical shock Fuse symbol Equipment protected by double or reinforced insulation Low Battery symbol Conforms to EU directives Do not discard this product in household trash. AC measurement DC measurement Earth ground Unsafe Voltage Alert When the meter detects a voltage equal to or greater than 30V or a voltage overload (OL) in V or Lo Z mode, the symbol is displayed. This system was designed to alert the user of a potentially hazardous voltage. PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLT AGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient over‐voltages to an appropriate low level. Note – Examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy‐consuming equipment to be supplied from the fixed installation. Note – Examples include household, office, and laboratory appliances. OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations. Note – Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation. OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. ...
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Page 6: Descriptions
3. Descriptions Meter Description (EX655 pictured) Non‐Contact Voltage Detector Clamp jaw Work Light ON/OFF button NCV alert LED lamp Rotary function switch Max‐Min button Relative , DCA Zero, and Inrush button (DCA Zero & Inrush on EX655 only) LCD multi‐function display with backlighting Positive input terminal Common (‐) input terminal Mode (M) and LPF (low pass filter) button (LPF on EX655 only) Backlight and Hold button Jaw Trigger Work Light Note: Battery compartment on back of meter Fig 3‐1 METER DESCRIPTION EX65x‐en‐GB_V1.6 7/16 ... - Page 7 Display Icon Descriptions for EX650 1 2 3 4 5 14 15 16 Fig 3‐2 EX650 METER DISPLAY High voltage Battery status Relative mode Auto power off Data hold Units of measure Direct Current Alternating Current Diode 10. Continuity 11. Automatic range 12. Low Impedance mode (Lo Z) 13. Maximum and Minimum memory 14. Non‐Contact Voltage Detector 15. Low Pass Filter (LPF) 16. Temperature units EX65x‐en‐GB_V1.6 7/16 ...
- Page 8 Display Icon Descriptions for EX655 1 2 3 4 5 12 13 15 16 17 Fig 3‐3 EX655 METER DISPLAY High voltage Battery status Relative mode Auto power off Data hold Units of measure Direct Current Alternating Current Diode 10. Continuity 11. Automatic range 12. Low Impedance mode (Lo Z) 13. Inrush Current (Surge) 14. Maximum and Minimum memory 15. Non‐Contact Voltage Detector 16. Low Pass Filter (LPF) 17. Temperature units 18.
- Page 9 Fig. 3‐4 (a) EX655 MODE Button Function Table Switch Position MODE (M) Button Function AC Hz DC AC DC or Ω TEMP C F Fig. 3‐4 (b) EX650 MODE Button Function Table Switch Position MODE (M) Button Function AC DC AC DC Ω Momentarily press to access/exit the Relative mode. This mode of operation is only available for DC voltage, AC Current, Resistance, and Capacitance. In DC Mode, press to zero the display (EX655 only) When the EX655 is in the ACA mode, press and hold to access the Inrush mode. Press to access the MIN/MAX mode. The MAX icon will appear along with the stored highest reading. Press again to view the minimum reading stored (MIN icon ...
- Page 10 Fig 3‐5(a) ‐ Function Switch Description (EX655) Low Impedance mode for AC Voltage measurements Meter POWER OFF position AC/DC Voltage and Hz for ACV (use MODE button to choose AC, Hz, or DC) Frequency mode Capacitance, Continuity, Diode, Resistance modes (use MODE button to choose mode) Temperature mode 600µA AC/DC Current mode (use MODE button to choose AC or DC) AC/DC 600A Current mode (use MODE button to choose AC or DC) Non‐Contact Voltage Detect position with alert LED Fig 3‐5(b) ‐ Function Switch Description (EX650) Low Impedance mode for AC Voltage measurements Meter POWER OFF position AC/DC Voltage (use MODE button to choose AC or DC) Capacitance, Continuity, Diode, Resistance modes (use MODE button to choose mode) 600µA AC/DC Current mode (use MODE button to choose AC or DC) 6A AC Current mode 60A AC Current mode 600 A AC Current mode Non‐Contact Voltage Detect position with alert LED EX65x‐en‐GB_V1.6 7/16 ...
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Page 11: Operation
4. Operation CAUTION: Read and understand all of the Safety statements listed in the safety section of this manual prior to use. Powering the Meter Turn the rotary function switch to any position to power the meter. Check the batteries if the unit fails to power ON. Refer to the Maintenance section for battery replacement information. Turn the function switch to the OFF position to power OFF the meter. The meter has an Auto Power OFF sleep feature (APO) where the meter enters sleep mode after 15 minutes of inactivity. Press the Mode button to awaken the meter. When APO is enabled, the APO icon will show on the display when the meter is powered ON. To disable APO, refer to the next section. The low battery symbol appears on the display when the battery voltage weakens below the threshold. Disable Auto Power OFF The meter will enter sleep mode after 15 minutes of inactivity. Press the Mode button to awaken the meter. To defeat this feature, follow the steps below. With the meter OFF, press and hold the M (MODE) button and, while continuing to hold, turn the rotary function switch to any position to power ON the meter. The EX650 will beep five times indicating that APO has been disabled. The EX655 will beep two times indicating that APO has been disabled. Release the button. APO will now be disabled until the next cycle of power. Display Backlight With the meter powered ON, press and hold the backlight button to switch the backlight ON or OFF. Note that excessive use of the backlight will shorten the battery life. Work Light With the meter powered ON, press and hold the Work Light button on the right side of the meter. A momentary press will switch the Work Light off. The Work Light lamp is located on the back of the unit toward the bottom of the clamp jaw. Note that excessive use of the backlight will shorten the battery life. EX65x‐en‐GB_V1.6 7/16 ... -
Page 12: Data Hold
Data Hold To freeze the LCD meter reading, press the H (HOLD) button. While data hold is active, the HOLD display icon appears on the LCD. Press the H button to return to normal operation. The HOLD icon will switch OFF. Test Lead Considerations Test lead probe covers can be removed for CAT II 1000V installations. Use the test lead probe covers for CAT III 1000V or CAT IV 600V installations. Do not measure voltages > 1000V AC or DC. Remove the storage caps from the meter end of test leads before connecting leads to the meter. Voltage Measurements WARNING: Remove the test lead probe covers for CAT II 1000V installations. Use the test lead probe covers for CAT III 600V installations. Do not measure voltages greater than 750VAC or 1000VDC. CAUTION: When connecting the test leads to the circuit or device under test, connect the black lead before the red; when removing the test leads, remove the red before the black lead. Disconnect probes and circuit under test after all measurements are completed. The meter displays a high voltage warning prompt “ ” when the voltage measured is > 30VAC. The instrument will automatically beep and show the high voltage warning prompt flashing if the voltage input exceeds 750VAC or 1000VDC. Notes: AC measurements incorporate true RMS AC coupling. The accuracy of non‐sinusoidal waves must be adjusted as follows: Crest factor 1~2, accuracy increases by 3% Crest factor 2~2.5, accuracy increases by 5% Crest factor 2.5~3, accuracy increases by 7% In order to obtain accurate readings in the measurement of 600mV, use the relative measurement mode. First short‐circuit the probe input in, order to zero the reading, and then press the REL button; now read the voltage measured. The instrument automatically subtracts the short‐circuit display value of the probe from the reading. EX65x‐en‐GB_V1.6 7/16 ... - Page 13 AC Voltage Measurements Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into the positive (V/Ω) jack. Turn the function switch to the position. Use the M (MODE) button to select AC. Read the Warning and Caution statements above to determine whether or not to use the test lead probe covers. Touch the test probe tips to the circuit under test. Read the digital value and the 60‐segment bargraph (EX655 only) on the display. The meter is Auto Ranging (Auto displayed on LCD) and therefore selects the proper decimal point position. The meter also displays the measurement type, unit symbols, and other relevant multifunction icons. Use the M button to view the frequency (Hz) of the measured voltage (EX655 only). Important note: Wait until the meter is setup and actively measuring the voltage signal before accessing the Hz measurement mode. Note the voltage alert symbol when voltage is present. The meter is capable of detecting AC voltages to 750V. For EX655 only: Press and hold the LPF button to engage the Low Pass Filter circuit (the LPF icon will display). Press and hold LPF again to exit this mode. See the Low Pass Filter section for more details. 10. Set the function switch to the LoZ position to engage the low impedance circuit (the impedance will now be approximately 3kΩ). See the dedicated Lo Z section of this guide. AC Hz EX655 Fig 4‐1 AC VOLTAGE MEASUREMENTS EX65x‐en‐GB_V1.6 7/16 ...
- Page 14 DC Voltage Measurements Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into the positive (V/Ω) jack. Move the Function Switch to the position. Use the M button to select DC. Read the Warning and Caution statements at the beginning of the Voltage Measurement section to determine whether or not to use the test lead probe covers. Touch the test probe tips to the circuit under test. Be sure to observe the correct polarity (red lead to positive, black lead to negative). Read the digital value and the bar graph representation (EX655) of the measurement in the display. The display will also indicate the proper decimal point (Auto Range) and measurement type/units symbols. If the polarity is reversed, the display will show (‐) minus before the value. Note the voltage alert symbol when voltage is present. The meter is capable of detecting DC voltages to 1000V. Fig 4‐2 DC VOLTAGE MEASUREMENTS EX65x‐en‐GB_V1.6 7/16 ...
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Page 15: Lo Z' Ac Voltage Measurements
‘Lo Z’ AC Voltage Measurements The normal high input impedance (voltage measurement position) would typically be used for all AC voltage tests. However, if a voltage on a non‐energized line is detected use the Lo Z setting to determine if the voltage is really there or is it a ghost voltage. When the function switch is turned to the Lo Z position a low impedance (Z) test circuit is engaged that eliminates ghost voltages on non‐energized lines. Refer to the Voltage Measurements section earlier in this guide for Safety information and connection diagrams. *The Lo Z impedance is approx. 3kΩ. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into the positive (V/Ω) jack. Move the Function Switch to the Lo Z position. Touch the test probe tips to the AC circuit under test. Be sure to observe the correct polarity (red lead to positive, black lead to negative). Read the digital value and the 60‐segment bargraph representation of the measurement (EX655) in the display. The display will also indicate the proper decimal point and measurement type/units symbols. The meter is capable of detecting AC voltages to 600V in Lo Z mode. Note the voltage alert symbol when voltage is present. EX65x‐en‐GB_V1.6 7/16 ... -
Page 16: Current Measurements Using The Clamp
Current Measurements Using the Clamp WARNING: Do not measure the current on a circuit when the voltage increases to more than 750V AC or 1000V DC. This can cause damage to the instrument and can cause injury to persons. Fig. 4‐3 Correct and Incorrect Clamping Ensure that the probe leads are disconnected from the meter. Set the function switch to the for the EX655 or to the 6, 60, or 600 positions on the EX650. Use the M button to select AC or DC. For DC (EX655), press ZERO to remove any residual magnetism and to null the display before clamping onto a conductor. Press the trigger to open the clamp jaws. Fully enclose only one conductor in the jaws (Refer to Fig. 4‐3). For optimum results, center the conductor in the jaws. Read the current measurement in the display represented by numerical digits (and the 60‐ segment bar graph on the EX655). The display will indicate the proper decimal point and value. In DC (EX655), when the polarity is reversed, the display will show (‐) minus before the value. Press and hold the M button to engage the LPF (Low Pass Filter) circuit (to measure inverters, VFD, etc.). Refer to the dedicated section on Low Pass Filtering. Press and hold the INRUSH button to activate the Inrush Current utility (EX655 only). Refer to the dedicated Inrush Current section in this User Guide. EX65x‐en‐GB_V1.6 7/16 ... - Page 17 Current Measurement Considerations: Current measurement must be performed in the temperature range of 0~40 C (32 to 104 F). When pressing the trigger, do not suddenly release it; the clamp is sensitive to magnetism, heat, and mechanical stress and such impact will cause the reading to fluctuate briefly. If the reading is positive in the measurement of DC current, the direction of current is from top to bottom (meter faceplate is the top and the meter back is the bottom). In order to ensure measurement accuracy, the conductor measured must be positioned in the middle of the clamping area; otherwise additional error of reading of ±1.0% (typical) will be generated. The accuracy of non‐sinusoidal waves must be adjusted as follows: Crest factor 1~2, accuracy increases by 3% Crest factor 2~2.5, accuracy increases by 5% Crest factor 2.5~3, accuracy increases by 7% EX65x‐en‐GB_V1.6 7/16 ...
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Page 18: Μa Ac/Dc Current Measurements Using Test Leads
µA AC/DC Current Measurements using Test Leads WARNING: Do not handle the test leads above the finger/hand guard barrier. CAUTION: Observe CAT II 1000V and CAT III 600V with respect to Earth Ground. Insert the black test lead into the COM terminal and the red test lead into the A terminal. Turn the meter’s function switch to the position. The µA unit symbol will appear on the display indicating that micro‐amperes are being measured. The meter display will show AC or DC (use the M button to select AC or DC). Current measurements must be taken in series with the circuit under test. See accompanying diagram. Touch the black test lead to the negative side of the circuit and the red test lead to the positive side of the circuit. Read the current measurement in the display represented by the numerical digits and the bar graph (EX655). The display will indicate the proper decimal point and value. In DC, If the polarity is reversed, the display will show (‐) minus before the value. Fig 4‐4 µA AC/DC CURRENT MEASUREMENTS EX65x‐en‐GB_V1.6 7/16 ... -
Page 19: Non-Contact Voltage Detector
Non‐Contact Voltage Detector WARNING: It is possible for voltage to be present in a circuit even if the meter does not beep or flash the NCV LED lamp. Always verify meter operation on a known live AC current circuit and verify that the batteries are fresh before use. When the meter senses an AC Voltage or electromagnetic field > 100VAC, the following occurs: The audible beeper sounds ON and OFF The LED lamp at the NCV function switch position flashes ON and OFF The display shows 1, 2, 3, or 4 dashes The greater the electrical field strength, the faster the rate of the audible beeper, the flashing of the LED lamp, and the number of dashes displayed. If the meter does not emit a tone or flash the LED in this mode, there is still the possibility that voltage is present; please use caution. Turn the function switch to the NCV position to select Non‐Contact Voltage Detect mode. Note that EF is displayed when in this mode. If the EF does not display when the function switch is turned to the NCV position, check the batteries and do not use the meter until EF is displayed. To test, place the meter near a source of electrical energy. Note that the tip of the meter offers the highest sensitivity. Note the audible beeping, the flashing LED, and the displayed dashes when a source of electrical energy is detected. Fig 4‐5 NON‐CONTACT VOLTAGE DETECTOR EX65x‐en‐GB_V1.6 7/16 ... -
Page 20: Resistance Measurements
Resistance Measurements CAUTION: Switch OFF power to the device under test before measuring. Do not test on circuits or devices where 60VDC or 30VAC is present. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive (V/Ω) jack. Turn the Function Switch to the Ω position. Use the M button to select the Ω icon on the display indicating resistance only (without the continuity/diode/capacitance icons showing). Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading. Read the resistance value in the display. The display will indicate the proper decimal point and value. If the reading is out of range, the OL display icon will appear. Fig 4‐6 RESISTANCE MEASUREMENTS EX65x‐en‐GB_V1.6 7/16 ... - Page 21 Resistance Measurement Notes: The display will show “OL” when an open circuit is detected or if the resistance > maximum range. The test leads introduce an error of approx. 0.1Ω～0.2Ω for low resistance measurements. Use the Relative mode to obtain accurate readings. Short the test leads together, press the REL button, and then measure a low resistance. The meter subtracts the short‐circuit value from the reading. If the test lead resistance of probe is > 0.5Ω when shorted, inspect the test leads and the connection. It may take several seconds for the reading to stabilize when measuring resistance >1MΩ. This is normal operation. For personal safety, do not measure a circuit with voltages > 30V DC or AC. EX65x‐en‐GB_V1.6 7/16 ...
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Page 22: Continuity Measurements
Continuity Measurements Insert the black test lead into the negative COM terminal and the red test lead into the positive terminal. Set the function switch to the position. Use the M button to select the Continuity mode. Look for the Continuity icon on the display. Touch the test probe tips across the wire or circuit under test. If the resistance is < 30 Ω, the beeper will sound continuously. For an open circuit condition the meter will display . Fig 4‐7 CONTINUITY MEASUREMENTS Continuity Measurement Notes: Turn off power to the circuit under test and discharge capacitors before measuring continuity. Open‐circuit voltage is approx. ‐3.5V Continuity measurement range is 600Ω. For personal safety, do not measure a circuit with voltages > 30V DC or AC. Disconnect test leads and circuit measured after measurements are completed. EX65x‐en‐GB_V1.6 7/16 ... -
Page 23: Capacitance Measurements
Capacitance Measurements WARNING: To avoid electric shock, remove power to the circuit under test and discharge the capacitor under test before measuring. Do not test on circuits or devices where 60VDC or 30VAC is present. Set the function switch to the capacitance position. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive jack. Press the M button to select the unit of measure symbol F. Touch the test probe tips across the part under test. Use the Relative mode to compare measurements to a saved, known capacitance value. See the dedicated Relative mode instructions in this user guide for more detail. Read the capacitance value in the display (bargraph is not available in capacitance mode). The display will indicate the proper decimal point and value. Relative Fig 4‐8 CAPACITANCE MEASUREMENTS EX65x‐en‐GB_V1.6 7/16 ... - Page 24 Capacitance Measurement Notes: The display will show “OL” if a capacitor is short‐circuited or if the measured capacitance > maximum range of the instrument. The bargraph is not active in the capacitance measurement mode. Capacitance measurements > 600μF may require several seconds to obtain a stable reading.
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Page 25: Frequency Measurements (Ex655)
Frequency Measurements (EX655) Insert the black test lead banana plug into the negative (COM) jack. Insert the red test lead banana plug into the positive (V/Ω) jack. Turn the Function Switch to the Hz position. Touch the test probe tips across the circuit under test. Read the Frequency value in the display. -
Page 26: Diode Test
Diode Test Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive jack. Turn the function switch to position. Use the M button to select the diode function, the diode and voltage symbols will appear on the LCD when in Diode test mode. -
Page 27: Temperature Measurements (Ex655 Only)
Temperature Measurements (EX655 only) Insert the supplied temperature probed into the COM and positive terminals observing correct polarity. Turn the function switch to the TEMP position. Use the M button to choose the temperature units Touch the temperature probe tip to the device under test or leave the temperature probe in the open air to measure ambient temperature. -
Page 28: Extended Functionality Modes
Extended Functionality Modes In addition to the basic measurements, a variety of extended functions are included. Refer to the following sections for details. Inrush Current Mode (EX655 only) In Inrush current mode, the meter displays the RMS AC current reading in the first 100ms period after the trigger point (current detection threshold) is reached, see Fig. 5.3 below. The current detection threshold is 5.0A for the 600.0A range. -
Page 29: Dca Zero (Ex655 Only)
DCA ZERO (EX655 only) The DC ZERO feature removes any offset values and improves the accuracy for DC current measurements. Turn the function switch to the position and use the M button to select DC. Ensure that there is no conductor in the clamp jaws. Press the ZERO button;... -
Page 30: Low Pass Filter (Lpf) Ex655 Only
Low Pass Filter (LPF) EX655 only The LPF mode eliminates high frequency noise in voltage and current measurements by means of a low‐pass filter. The LPF mode is designed the measurement of Inverters, Variable Frequency Drives, etc. The display icon LPF (Low Pass Filter) is displayed when this mode is active. -
Page 31: Maintenance
5. Maintenance WARNING: To avoid electrical shock, remove the test leads, disconnect the meter from any circuit and turn OFF the meter before opening the case. Do not operate with an open case. Battery Replacement Remove the test leads from the meter. Remove the Phillips head screw that secures the battery compartment at the back of the meter. -
Page 32: Specifications
0.001 A ± (2.5% + 30 digits) AC Current 60.00 A 0.01 A 600A ± (2.5% + 5 digits) 600.0 A 0.1 A *6A range on EX650 only True RMS current applicable to 10%~100% of range; Frequency response: 50~60Hz Accuracy value increases (5% typical) when measuring varying frequency for non‐sinusoidal wave (EX655) Inrush measurement accuracy is not specified; Inrush measurements are offered for reference purposes only. 60.00 A 0.01 A DC Current ± (2.5% + 5 digits) 600A 600.0 A 0.1 A... - Page 33 99.99nF 0.01 nF ± (4.0% + 25 digits) 999.9nF 0.1 nF 9.999 µF 0.001 µF ± (4.0% + 5 digits) 1000V DC Capacitance (EX650) 99.99 µF 0.01 µF 750V AC 999.9 µF 0.1 µF 9.999 mF 0.001 mF ± (10%) 59.99 mF...
- Page 34 ‐40~40 ± (3.0% + 5 digits)* 40~400 1000V DC 100~1000 ± (2.0% + 5 digits)* 750V AC ‐40~104 ± (3.0% + 10 digits)* TEMP (EX655) 104~752 752~1832 ± (2.0% + 10 digits)* *Does not include accuracy of the temperature probe. Accuracy specifications assume surrounding temperature stable to ±1 C. For ambient temperature changes of ±5 C, rated accuracy applies after 2 hours of stabilization time. Non‐Contact Voltage Detector ≥100Vrms; ≤10mm (LED/Buzzer indication) (NCV) The tip of the meter offers the optimum sensitivity EX65x‐en‐GB_V1.6 7/16...
- Page 35 “OL” or “‐OL” is displayed Conversion rate 3 updates per second Clamp Sensor Type Coil induction (EX650); Hall Effect (EX655) Test position error Additional error of ±1.0% of reading applies when the conductor under test is not positioned at the center of the clamp head for current measurements Max. Jaw Opening ...
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