Related Manuals for Extech Instruments MN62
Summary of Contents for Extech Instruments MN62
- Page 1 USER GUIDE True RMS Digital Multimeter With Non‐Contact Voltage Detector and Low Pass Filter Model MN62 ...
- Page 2 Introduction Thank you for selecting the Model MN62 True RMS Auto‐ranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Variable Frequency Voltage (VFC), Resistance, Capacitance, Frequency, Duty Cycle (AC only), Diode Test, and Continuity; a Non‐Contact Voltage Detector is also built‐in. 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 True RMS AC Measurements Non‐contact Voltage Detector 4000 Count Multifunction LCD Display Automatic and Manual Ranging ...
- Page 3 Safety The MN62 is designed in compliance with standards such as IEC/EN61010‐1, pollution grade II, overvoltage CAT III 600V and double insulation standards. Please comply with the instructions provided in this guide otherwise the protection provided by the instrument may be affected. This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter. This WARNING symbol indicates a potentially hazardous situation, which if not WARNING avoided, could result in death or serious injury. This CAUTION symbol indicates a potentially hazardous situation, which if not CAUTION avoided, may result damage to the product. This symbol advises the user that the terminal(s) so marked must not be 600V connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 600V AC rms or DC. 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. For maximum safety, the meter and its test leads should not be handled when these terminals are energized. This symbol indicates that a device is protected throughout by double insulation or reinforced insulation. PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. ...
- Page 4 This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation. 1. NEVER apply voltage or current to the meter that exceeds the specified maximum: Input Protection Limits Function Maximum Input V DC or V AC 600VDC/AC rms µA/mA AC/DC 500mA 600V fast acting fuse A AC/DC 10A 600V fast acting fuse Frequency, Resistance, Capacitance, Duty Cycle, 600VDC/AC rms Diode Test, Continuity 2. USE EXTREME CAUTION when working with high voltages. 3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground. 4. NEVER connect the meter leads across a voltage source while the function switch is in the current, resistance, or diode mode. Doing so can damage the meter. 5. ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests. 6. ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries. 7. NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely. 8. NEVER change the measurement function by turning the function dial while testing. 9. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. MN62‐en‐GB_V1.1 12/15 ...
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Page 5: Meter Description
8. ‘mAµA’ probe input jack 9. COM (‐) input jack 10. Positive (+) input jack 11. SELECT‐Variable Frequency Control button 12. HZ‐% button 13. REL (Relative) button Note: Tilt stand, test lead holders, and battery/fuse compartment are on rear of unit. Button Descriptions RANGE button The default mode is Auto Range. To manually range, press RANGE to step through the ranges. Press and hold RANGE to return to Auto Range mode. Auto Range is displayed in Auto mode. MAX‐MIN button Press to activate the MAX/MIN recording mode (MAX will appear). The meter will display and hold the maximum reading. Press again (MIN will appear). The meter will display and hold the minimum reading. To exit, press and hold MAX‐MIN for 2 seconds. REL (Relative) button The displayed value, at the time of the button press, becomes the Reference value with which subsequent readings are compared. See dedicated Relative mode section. HOLD and Backlight button Short press to freeze displayed reading (H icon is visible). Press again to release reading. Press and hold to switch backlight ON or OFF. Hz‐% button Frequency (Hz) and Duty Cycle (%) modes. Available only in the AC Voltage/Current and Frequency modes. SELECT‐VFC button Short presses select AC or DC for voltage and current measurements. In AC Voltage VFC mode, press and hold to access VFC (Variable Frequency Control) where a low pass filter is employed for measuring the voltage of a variable frequency/speed drive. MN62‐en‐GB_V1.1 12/15 ... -
Page 6: Display Description
See units prefix list below Voltage See units prefix list below Amperes (Amps) Current Farads (Capacitance) Percent (%) duty cycle (for AC only) Battery status icon APO (Auto Power OFF) active Measurement reading digits Non‐contact voltage detector (displays EF in reading area) Auto Range is shown in Auto Range mode MAX‐MIN memory active Data Hold active Continuity test (Resistance) Diode test Minus (negative) sign AC (alternating current) or DC (direct current) mode VFC (low pass filter) Variable Frequency Control Measurement unit prefixes ‐9 n nano (10 ) (capacitance) ‐6 µ micro (10 ) (amps, cap) ‐3 m milli (10 ) (volts, amps) k kilo (10 ) (ohms) M mega (10 ) (ohms) MN62‐en‐GB_V1.1 12/15 ... -
Page 7: Auto Power Off (Apo)
AUTOMATIC and MANUAL Range The meter defaults to AUTO Range mode when it is switched ON. In this mode the meter automatically selects the best range for the measurements being made and is generally the best mode for most measurements. For measurement situations requiring that a range be manually selected, perform the following: 1. Press the RANGE button. The “AUTO RANGE” display indicator will turn off. 2. Press the RANGE button to step through the available ranges. 3. To exit the Manual Ranging mode and return to Auto ranging, press and hold the RANGE button for 2 seconds. MAX/MIN Memory 1. Press the MAX/MIN button to activate the MAX/MIN recording mode. The display icon MAX will appear. The meter will display and hold the maximum reading and will update only when a new maximum reading occurs. 2. Press the MAX/MIN button again and the display icon MIN will appear. The meter will display and hold the minimum reading and will update only when a new minimum reading occurs. 3. To exit MAX/MIN mode press and hold the MAX/MIN button for 2 seconds. Relative mode The relative measurement feature allows the user to make measurements relative to a stored reference value. A reference voltage, current, etc. can be stored where subsequent measurements can be made in comparison to that stored reference value. The displayed value is the difference between the reference value and the measured value. 1. Perform a measurement as described in the operating instructions. 2. Press the REL button to store the reading; the Relative indicator will appear on the display. 3. The display will now indicate the difference between the stored and measured value. 4. Press the REL button to exit the relative mode. The Relative indicator will switch OFF. MN62‐en‐GB_V1.1 12/15 ... -
Page 8: Display Backlight
Display Backlight Press and hold the button to turn the backlight ON/OFF. The backlight will automatically turn off after 30 seconds. Data Hold The Data Hold function freezes the reading in the display. Press the HOLD button to switch Data Hold ON/OFF. When the Data Hold mode is active the display will show the H icon. DC VOLTAGE MEASUREMENTS CAUTION: Do not measure DC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. Set the function switch to the V position. Press the SELECT button to switch to DC if necessary. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack. 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. Use the RANGE button to manually range the reading. Press and hold the RANGE button to return to Auto Range Mode. Read the voltage in the display. AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present. CAUTION: Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. Set the function switch to the V position. Press the SELECT button to switch to AC if necessary. Insert the black test lead banana plug into the negative COM jack. Insert red test lead banana plug into the positive V jack. Touch the black test probe tip to the neutral side of the circuit. Touch the red test probe tip to the “hot” side of the circuit. Read the voltage in the display. Use the RANGE button to manually range the reading. Press and hold the RANGE button to return to Auto Range Mode. MN62‐en‐GB_V1.1 12/15 ... - Page 9 AC VOLTAGE MEASUREMENTS with VFC, Hz, and % Duty Cycle WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present. CAUTION: Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. Set the function switch to the VFC position. Insert the black test lead banana plug into the negative COM jack. Insert red test lead banana plug into the positive V jack. Press and hold the VFC button until the meter beeps and VFC is briefly displayed. The meter is now applying a low pass filter (Note: VFC is Variable Frequency Control). Press and hold the VFC button again to exit the VFC mode (END will briefly display). Touch the black test probe tip to the neutral side of the circuit. Touch the red test probe tip to the “hot” side of the circuit. Read the voltage in the display. Press the Hz/% button to indicate Hz. Read the frequency in the display. Press the Hz/% button again to indicate %. Read the % duty cycle in the display. % Duty Cycle Note: Duty Cycle measurements are AC only for this meter. Measurement signals must be ‘zero crossing’ and must reach ‐0.7V for the meter to properly display Duty Cycle %. MN62‐en‐GB_V1.1 12/15 ...
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Page 10: Dc Current Measurements
DC/AC MILLIVOLT MEASUREMENTS CAUTION: Do not measure DC/AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. Set the function switch to the mV position. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack. Press the SELECT button to select DC or AC millivolts. 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. (Figure at right shows DC measurement only). Read the voltage in the display. For AC, press the Hz/% button to indicate Hz. Read the frequency in the display. For AC, press the Hz/% button again to indicate %. Read the % duty cycle in the display. DC CURRENT MEASUREMENTS CAUTION: Do not make 5A current measurements for longer than 30 seconds. Allow 15 minutes between tests. Exceeding 30 seconds may cause damage to the meter and/or the test leads. Insert black test lead banana plug into the negative COM jack. For current measurements up to 6000µA DC, set the function switch to the µA position and insert the red test lead banana plug into the µA/mA jack. For current measurements up to 600mA DC, set the function switch to the mA position and insert the red test lead banana plug into the µA/mA jack. For current measurements up to 10A DC, set the function switch to the A position and insert the red test lead banana plug into the 10A jack. Press the SELECT button to indicate DC on the display. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. 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. Apply power to the circuit. Read the current in the display. MN62‐en‐GB_V1.1 12/15 ... -
Page 11: Ac Current (Frequency, Duty Cycle) Measurements
For current measurements up to 600mA AC, set the function switch to the mA position and insert the red test lead banana plug into the µA/mA jack. For current measurements up to 10A AC, set the function switch to the A position and insert the red test lead banana plug into the 10A jack. Press the SELECT button to indicate “AC” on the display. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. Touch the black test probe tip to the neutral side of the circuit. Touch the red test probe tip to the “hot” side of the circuit. Apply power to the circuit. Read the current in the display. Press the Hz/% button to indicate “Hz”. Read the frequency in the display. Momentarily press the Hz/% button again to indicate “%”. Read the % duty cycle in the display. Press the Hz/% button to return to the current‐only measurement. % Duty Cycle Note: Duty Cycle measurements are AC only for this meter. Measurement signals must be ‘zero crossing’ and must reach ‐0.7V for the meter to properly display Duty Cycle %. MN62‐en‐GB_V1.1 12/15 ... -
Page 12: Resistance Measurements
position. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive Ω jack. Press the SELECT button to indicate Ω on the display. 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 in the display. Resistance Measurement Notes The display shows OL when the measured resistance open‐circuit or resistance value exceeds maximum range. When measuring low resistance, a test‐lead measurement error of 0.1 to will exist. Short the test leads and use the Relative mode to null the test‐lead error. Check the test leads for loosening or other breakage and verify that the lead resistance is 0.5 or less by shorting the leads and viewing the displayed reading. Replace test leads if necessary. Several seconds are required for stability when taking high resistance measurements. Do not input signals > 60VDC or 30VAC. CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. Set the function switch to the Ω position. Insert the black lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive Ω jack. Press the SELECT button to indicate Ω on the display Touch the test probe tips to the circuit or wire you wish to check. If the resistance is > 150Ω there will be a break in the circuit but no beeper will sound. If the resistance is 10Ω, the beeper signal will ≤ sound. If the circuit is open, the display will indicate “OL”. Continuity Measurement Notes Switch OFF power to any devices on the measurement circuit Do not input signals > 60VDC or 30VAC MN62‐en‐GB_V1.1 12/15 ... -
Page 13: Diode Test
DIODE TEST Set the function switch to the Ω position. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack. Press the SELECT button to indicate and V on the display. Touch the test probes to the diode under test. Forward voltage will typically indicate 0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices will indicate near 0V and an open device will indicate “OL” in both polarities. Diode Measurement Notes Switch OFF power to any devices on the measurement circuit Do not input signals > 60VDC or 30VAC CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements. Remove the batteries and unplug the line cords. Set the rotary function switch to the Capacitance symbol position. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack. Touch the test leads to the capacitor to be tested. Read the capacitance value in the display Capacitance Measurement Notes The meter will display a fixed reading with no input connected, this is the internal fixed capacitance; please use the Relative mode to null the effect of the internal fixed capacitance (especially for low capacitance measurements). The display will show OL when the capacitor is short‐circuited or if the capacitance value exceeds the maximum range of the meter. High capacity capacitors require a longer time period to stabilize than lower capacity devices. To prevent damage to the instrument and personal injury, release all residual charges to devices under test before taking measurements. MN62‐en‐GB_V1.1 12/15 ... -
Page 14: Non-Contact Voltage Detector
Set the rotary function switch to the Hz/% position. Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack. Touch the test probe tips to the circuit under test. Read the frequency on the display. Press the Hz/% button to indicate “%”. Read the % duty cycle in the display. % Duty Cycle Note: Duty Cycle measurements are AC only for this meter. Measurement signals must be ‘zero crossing’ and must reach ‐0.7V for the meter to properly display Duty Cycle %. Frequency (Electronic) Measurement Note: Do not input signals > 60VDC or 30VAC NON‐CONTACT VOLTAGE DETECTOR WARNING: To avoid electric shock, do not use this meter in the Non‐Contact Voltage Detector mode if the meter does not power up when the function dial is set to the NCV position. Set the rotary function switch to the NCV position. Hold the meter top near to a source of AC voltage or electromagnetic field. The test leads are not necessary in the NCV mode. The front LED lamp will light and the beeper will sound when an AC voltage or electromagnetic field is sensed. The beeper sound changes with changing intensity of the detected energy source. The display shows EF (Electromotive Force) in this mode. MN62‐en‐GB_V1.1 12/15 ... -
Page 15: Maintenance
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. Turn power off and disconnect the test leads from the meter. Open the rear battery cover (behind the tilt stand) by removing the screw using a Phillips head screwdriver. Replace the two (2) 1.5V AA batteries in the battery holder, observing correct polarity. Put the battery cover back in place. Secure with the screw. Never dispose of used batteries or rechargeable batteries in household waste. As consumers, users are legally required to take used batteries to appropriate collection sites, the retail store where the batteries were purchased, or wherever batteries are sold. Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end‐of‐life devices to a designated collection point for the disposal of electrical and electronic equipment. WARNING: To avoid electric shock, do not operate the meter until the battery cover is in place and fastened securely. NOTE: If the meter does not work properly, check the fuses and batteries to make sure that they are still good and that they are properly inserted. MN62‐en‐GB_V1.1 12/15 ... - Page 16 FUSE REPLACMENT WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the meter cover. Disconnect the test leads from the meter. Remove the meter’s protective rubber holster (jacket). Loosen the center Phillips head screw on the back of the meter while pulling the battery compartment cover away from the meter. When the screw is loosened sufficiently, the battery compartment cover can be removed. Refer to diagram below. Remove the batteries. Fuse F1 will be visible (directly below the battery compartment); replace fuse F1: FF0.5A H 600V (CE) (ϕ6x32mm). Remove the remaining two Phillips head screws located on the back of the meter near the bottom. Open the meter housing by pulling the two halves of the meter assembly apart. Fuse F2 will be now be visible (directly below F1); replace fuse F2: F10A H 600V (CE) (ϕ6x25mm). When replacing fuses, gently remove the old fuse and install the new fuse into the holder. Always use a fuse of the proper size and value. Re‐assemble and secure the meter housing, batteries, and battery cover before attempting to use the meter. WARNING: To avoid electric shock, do not operate the meter until the meter housing and battery compartment cover are fastened securely. MN62‐en‐GB_V1.1 12/15 ...
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Page 17: Electrical Specifications
All AC voltage ranges are specified from 5% of range to 100% of range Crest Factor: ≤3 at full scale up to 400V, decreasing linearly to ≤1.5 at 600V DC Current 400.0A 0.1A 4000A 1A (0.7% reading + 2 digits) 40.00mA 10A 400.0mA 0.1mA 4.000A (1.0% reading + 3 digits) 10.00A 10mA DCA notes: Overload protection for A/mA range: F1 fuse (ϕ6x32)mm; FF0.5A H 600V (CE) Overload protection for 10A range: F2 fuse (ϕ6x25)mm F 10A H 600V (CE) AC Current 400.0A 0.1A 4000A 1A (1.0% reading + 3 digits) 40.00mA 10A 400.0mA 0.1mA 4.000A (1.2% reading + 3 digits) 10.00A 10mA ACA notes: True RMS Frequency response: 45~1kHz All AC voltage ranges are specified from 5% of range to 100% of range Overload protection same as DC Current overload protection (see above) MN62‐en‐GB_V1.1 12/15 ... - Page 18 (Relative) (4.0% reading + 10 digits) (4.0% reading + 5 digits) 99.99nF~999.9µF 10pF~0.1µF (10% reading) 9.999mF~99.99mF 1µF~10µF Capacitance notes: Overload protection: 600V For capacitor measurements ≤ 1µF use Relative measurements to ensure measurement accuracy (0.1% reading + 4 digits) Frequency 9.999Hz~9.999MHz 0.001Hz~0.001MHz (electronic) Duty Cycle 1%~99% 0.1% Not defined Frequency and Duty Cycle notes: Overload protection 600V Input range sensitivity: ≤ 100kHz: 100mVrms >100kHz: 200mVrms >1MHz: 500mVrms 5MHz~10MHz: 900mVrms Duty Cycle % is only applicable for zero crossing AC measurements ≤ 100kHz Continuity Beeper sounds when resistance is ≤ 10. Display resolution: 0.1; Overload protection: 600V Diode Open circuit voltage is approx. 3.2V. Silicon PN junction bias ranges 0.5 to 0.8V Resolution: 1mV; Overload protection: 600V Note: Accuracy specifications consist of two elements: (% reading) Accuracy of the measurement circuit (+ digits) Accuracy of the analog to digital converter MN62‐en‐GB_V1.1 12/15 ...
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Page 19: General Specifications
10A range: F2 fuse (ϕ6x25mm) F 10A H 600V (CE) Operating Temperature 0 C to 40 C (32 F to 104 F) Storage Temperature ‐10 C to 50 C (14 F to 122 F) Operating Humidity ≤ 75% RH for 0~30 C (32~86 F); ≤ 50% RH for 30~40 C (86~104 Operating Altitude 2000m (7000’) maximum Weight 350g (12.3oz.) includes holster and batteries Dimensions 175 x 80 x 48.5mm (6.9 x 3.1 x 1.9”) includes holster Safety EN61010‐1: CATIII 600V; Pollution Degree 2 Approvals CE/UL UL Listed The UL mark does not indicate that this product has been evaluated for the accuracy of its readings. Copyright © 2015 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form www.extech.com MN62‐en‐GB_V1.1 12/15 ...