Extech EX520 Operating Manual

User's Guide
True RMS Industrial Multimeter
Extech EX520
Introduction
Congratulations on your purchase of the Extech EX520 True RMS Autoranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency (electrical & electronic), Diode Test, and Continuity plus Thermocouple Temperature. It features a waterproof, rugged design for heavy duty use. Proper use and care of this meter will provide many years of reliable service.
Safety
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.
WARNING
CAUTION
MAX 1000V
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.
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. Note – Examples include electricity meters and primary over-current protection equipment
This WARNING symbol indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury.
This CAUTION symbol indicates a potentially hazardous situation, which if not avoided, may result damage to the product.
This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 1000 VAC or VDC.
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.
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SAFETY INSTRUCTIONS
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 1000VDC/AC rms
mA AC/DC 800mA 1000V fast acting fuse
A AC/DC
Frequency, Resistance, Capacitance, Diode Test, Continuity
Temperature 1000VDC/AC rms
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. If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
10A 1000V fast acting fuse (20A for 30 seconds max every 15 minutes)
1000VDC/AC rms
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Controls and Jacks
1. 6,000 count LCD display
2. RANGE button
3. Hz and % button
4. Mode button
5. Function switch
6. mA, µA and 10A input jacks
7. COM input jack
8. Positive input jack
9. HOLD and Backlight button
10. RELATIVE button
11. MAX/MIN button
Note: Tilt stand and battery compartment are
on rear of unit.
Symbols and Annunciators
Auto power off
•))) Continuity
Diode test
Battery status n nano (10 µ micro (10 m milli (10 A Amps k kilo (10 F Farads (capacitance) M mega (10 Ohms Hz Hertz (frequency) V Volts % Percent (duty ratio) REL Relative AC Alternating current AUTO Autoranging DC Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade MAX Maximum MIN Minimum
-9
) (capacitance)
-6
) (amps, cap)
-3
) (volts, amps)
3
) (ohms)
6
) (ohms)
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Operating Instructions
WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care.
1. ALWAYS turn the function switch to the OFF position when the meter is not in use.
2. If “OL” appears in the display during a measurement, the value exceeds the range you have selected. Change to a higher range.
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.
1. Set the function switch to the green VDC position.
2. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack.
3. 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.
4. Read the voltage in the display.
AC VOLTAGE (FREQUENCY, DUTY CYCLE) 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.
1. Set the function switch to the green VAC/Hz/% position.
2. Insert the black test lead banana plug into the negative COM jack. Insert red test lead banana plug into the positive V jack.
3. 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.
4. Read the voltage in the display.
5. Press the HZ/% button to indicate “Hz”.
6. Read the frequency in the display.
7. Press the Hz/% button again to indicate “%”.
8. Read the % of duty cycle in the display.
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DC CURRENT MEASUREMENTS
CAUTION: Do not make 20A current measurements for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 6000µA DC, set the function switch to the yellow µA position and insert the red test lead banana plug into the µA/mA jack.
3. For current measurements up to 600mA DC, set the function switch to the yellow mA position and insert the red test lead banana plug into the µA/mA jack.
4. For current measurements up to 20A DC, set the function switch to the yellow 10A/HZ/% position and insert the red test lead banana plug into the 10A jack.
5. Press the MODE button to indicate “DC” on the display.
6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current.
7. 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.
8. Apply power to the circuit.
9. Read the current in the display.
AC CURRENT (FREQUENCY, DUTY CYCLE) MEASUREMENTS
CAUTION: Do not make 20A current measurements for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
1. Insert the black test lead banana plug into the negative COM
jack.
2. For current measurements up to 6000µA AC, set the function
switch to the yellow µA position and insert the red test lead banana plug into the µA/mA jack.
3. For current measurements up to 600mA AC, set the function
switch to the yellow mA position and insert the red test lead banana plug into the µA/mA jack.
4. For current measurements up to 20A AC, set the function
switch to the yellow 10A/HZ/% position and insert the red test lead banana plug into the 10A jack.
5. Press the MODE button to indicate “AC” on the display.
6. Remove power from the circuit under test, then open up the
circuit at the point where you wish to measure current.
7. 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.
8. Apply power to the circuit.
9. Read the current in the display.
10. Press the Hz/% button to indicate “Hz”.
11. Read the frequency in the display.
12. Press the Hz/% button again to indicate “%”.
13. Read the % duty cycle in the display.
14. Press the Hz/% button to return to current measurement.
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RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit under test and
discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the green CAP position.
2. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive jack.
3. Press the MODE button to indicate “Ω" on the display.
4. 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.
5. Read the resistance in the display.
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on circuits or wires that
have voltage on them.
1. Set the function switch to the green CAP position.
2. Insert the black lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive jack.
3. Press the MODE button to indicate” "and “ on the display
4. Touch the test probe tips to the circuit or wire you wish to check.
5. If the resistance is less than approximately 35, the audible signal will sound. If the circuit is open, the display will indicate “OL”.
DIODE TEST
1. Set the function switch to the green CAP position.
2. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack.
3. Press the MODE button to indicate and V on the display.
4. 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.
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TEMPERATURE MEASUREMENTS
1. Set the function switch to the green Temp position.
2. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity.
3. Press the MODE button to indicate ºF or ºC
4. Touch the Temperature Probe head to the part whose temperature you wish to measure. Keep the probe touching the part under test until the reading stabilizes (about 30 seconds).
5. Read the temperature in the display.
Note: The temperature probe is fitted with a type K mini connector.
A mini connector to banana connector adaptor is supplied for connection to the input banana jacks.
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.
1. Set the rotary function switch to the green CAP position.
2. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack.
3. Press the MODE button to indicate “nF” on the display.
4. Touch the test leads to the capacitor to be tested.
5. The test may take up to 3 minutes or more for large capacitors to charge. Wait until the readings settle before ending the test.
6. Read the capacitance value in the display
FREQUENCY/DUTY CYCLE MEASUREMENTS (ELECTRONIC)
1. Set the rotary function switch to the green “Hz %” position.
2. Press the Hz/% button to indicate “Hz” in the display.
3. Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack.
4. Touch the test probe tips to the circuit under test.
5. Read the frequency on the display.
6. Press the Hz/% button again to indicate “%” on the display.
7. Read the % of duty cycle on the display.
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AUTORANGING/MANUAL RANGE SELECTION
When the meter is first turned on, it automatically goes into Autoranging. This 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 key. The “AUTO” display indicator will turn off.
2. Press the RANGE key to step through the available ranges until you select the range you want.
3. To exit the Manual Ranging mode and return to Autoranging, press and hold the RANGE key for 2 seconds.
Note: Manual ranging does not apply for the Capacitance and Frequency functions.
MAX/MIN
Note: When using the MAX/MIN function in Autoranging mode, the meter will “lock” into
the range that is displayed on the LCD when MAX/MIN is activated. If a MAX/Min reading exceeds that range, an “OL” will be displayed. Select the desired range BEFORE entering MAX/MIN mode.
1. Press the MAX/MIN key 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 “max” occurs.
2. Press the MAX/MIN key again and the display icon "MIN" will appear. The meter will display and hold the minimum reading and will update only when a new “min” occurs.
3. To exit MAX/MIN mode press and hold the MAX/MIN key for 2 seconds.
RELATIVE MODE
The relative measurement feature allows you to make measurements relative to a stored reference value. A reference voltage, current, etc. can be stored and measurements made in comparison to that value. The displayed value is the difference between the reference value and the measured value.
1. Perform the measurement as described in the operating instructions.
2. Press the REL button to store the reading in the display and the "REL" indicator will appear on the display.
3. The display will now indicate the difference between the stored value and the measured value.
4. Press the REL button to exit the relative mode.
Note: The Relative function does not operate in the Frequency function.
DISPLAY BACKLIGHT
Press the HOLD key for >1 second to turn on or off the display backlight function. The backlight will automatically turn off after 10 seconds.
HOLD
The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or to exit the HOLD function.
AUTO POWER OFF
The auto off feature will turn the meter off after 15 minutes. To disable the auto power off feature, hold down the MODE button and turn the meter on.
LOW BATTERY INDICATION
The icon will appear in the lower left conner of the display when the battery voltage becomes low. Replace the battery when this appears.
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Maintenance
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers.
WARNING: To avoid electric shock, do not operate your meter until the battery and fuse covers are in place and fastened securely.
This MultiMeter is designed to provide years of dependable service, if the following care instructions are performed:
1. KEEP THE METER DRY. If it gets wet, wipe it off.
2. USE AND STORE THE METER IN NORMAL TEMPERATURES. Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts.
3. HANDLE THE METER GENTLY AND CAREFULLY. Dropping it can damage the electronic parts or the case.
4. KEEP THE METER CLEAN. Wipe the case occasionally with a damp cloth. DO NOT use chemicals, cleaning solvents, or detergents.
5. USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE. Remove old or weak batteries so they do not leak and damage the unit.
6. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit.
BATTERY INSTALLATION
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the battery cover.
1. Turn power off and disconnect the test leads from the meter.
2. Open the rear battery cover by removing two screws (B) using a Phillips head screwdriver.
3. Insert the battery into battery holder, observing the correct polarity.
4. Put the battery cover back in place. Secure with the screws.
WARNING: To avoid electric shock, do not operate the meter until the battery cover is in place and fastened securely.
NOTE: If your meter does not work properly, check the fuses and batteries to make sure that
they are still good and that they are properly inserted.
A
A
B
B
A
10
F1 F2
REPLACING THE FUSES
WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the fuse cover.
1. Disconnect the test leads from the meter.
2. Remove the protective rubber holster.
3. Remove the battery cover (two “B” screws) and the battery.
4. Remove the six “A” screws securing the rear cover.
5. Gently remove the old fuse and install the new fuse into the holder.
6. Always use a fuse of the proper size and value (0.8A/1000V fast blow for the 600mA range [SIBA 70-172-40], 10A/1000V fast blow for the 20A range [SIBA 50-199-06]).
7. Replace and secure the rear cover, battery and battery cover.
WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in place and fastened securely.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants the basic instrument to be free of defects in parts and workmanship for three years from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 EXTENSION 210 for authorization or visit www.extech.com more information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied.
for
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for most products. Call the Customer Service Department for information on calibration services available for this product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy.
Support line (781) 890-7440
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
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Specifications
Function Range Resolution Accuracy
DC Voltage
AC Voltage
All AC voltage ranges are specified from 5% of range to 100% of range
DC Current
AC Current
All AC voltage ranges are specified from 5% of range to 100% of range
NOTE: Accuracy is stated at 65oF to 83oF (18oC to 28oC) and less than 75% RH.
600mV 0.1mV
6V 0.001V
60V 0.01V
600V 0.1V
1000V 1V
50 to 60Hz 40Hz to 1KHz
6V 0.001V
60V 0.01V
600V 0.1V
1000V 1V
600µA 0.1µA
6000µA 1µA
60mA 0.01mA
600mA 0.1mA
6A 0.001A
10A 0.01A
(20A: 30 sec max with reduced accuracy)
40Hz to 1kHz
600µA 0.1µA
6000µA 1µA
60mA 0.01mA
600mA 0.1mA
6A 0.001A 10A 0.01A
(20A: 30 sec max with reduced accuracy)
±(1.0% reading + 3 dgts) ±(2.0% reading + 3 dgts)
±(0.09% reading + 2 digits)
±(1.0% reading + 3 digits)
±(1.5% reading + 3 digits)
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Function Range Resolution Accuracy
Resistance
600 0.1
6k 0.001k
60k 0.01k
±(0.3% reading + 4 digits)
600k 0.1k
6M 0.001M
60M 0.01M ±(0.3% reading + 20 digits)
Capacitance
60nF 0.01nF
600nF 0.1nF
6µF 0.001µF
±(3.5% reading + 4 digits)
60µF 0.01µF
600µF 0.1µF
1000µF 1µF ±(5% reading + 5 digits)
Frequency (electronic)
9.999Hz 0.001Hz
99.99Hz 0.01Hz
999.9Hz 0.1Hz
9.999kHz 0.001kHz
99.99kHz 0.01kHz
±(0.1% reading + 1 digits)
999.9kHz 0.1kHz
9.999MHz 0.001MHz
40MHz .01MHz
Sensitivity: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5Vrms min @
Frequency (electrical)
Duty Cycle
20% to 80% duty cycle and > 100kHz
10.00-400Hz 0.01Hz
Sensitivity: 15Vrms
0.1 to 99.9% 0.1%
.
±(0.5% reading)
±(1.2% reading + 2 digits)
Pulse width: 100µs - 100ms, Frequency: 5Hz to 150kHz
Temp (type-K)
-50 to 1382°F 1°F
-45 to 750°C 1°C
±(3.0% reading + 5°C /9°F digits)
(probe accuracy not included)
Note: Accuracy specifications consist of two elements:
(% reading) – This is the accuracy of the measurement circuit.
(+ digits) – This is the accuracy of the analog to digital converter.
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Enclosure Double molded, waterproof (IP67) Shock (Drop Test) 6.5 feet (2 meters) Diode Test Test current of 0.9mA maximum, open circuit voltage 2.8V DC
typical
Continuity Check Audible signal will sound if the resistance is less than 100
(approx.), test current <0.35mA
Temperature Sensor Requires type K thermocouple Input Impedance >10M VDC & >10M VAC AC Response True rms ACV Bandwidth 40Hz to 1000Hz Crest Factor ≤3 at full scale up to 500V, decreasing linearly to ≤1.5 at 1000V Display 6,000 count backlit liquid crystal with bargraph Overrange indication “OL” is displayed Auto Power Off 15 minutes (approximately) with disable feature Polarity Automatic (no indication for positive); Minus (-) sign for negative Measurement Rate 2 times per second, nominal Low Battery Indication “ ” is displayed if battery voltage drops below operating voltage Battery One 9 volt (NEDA 1604) battery Fuses mA, µA ranges; 0.8A/1000V ceramic fast blow
A range; 10A/1000V ceramic fast blow
Operating Temperature 41°F to 104°F (5°C to 40°C) Storage Temperature -4°F to 140°F (-20°C to 60°C) Operating Humidity Max 80% up to 87°F (31°C) decreasing linearly to 50% at 104°F
(40°C)
Storage Humidity <80% Operating Altitude 7000ft. (2000meters) maximum. Weight 0.753lb (342g) (includes holster). Size 7.36” x 3.2” x 2.0” (187 x 81 x 50mm) (includes holster) Safety This meter is intended for origin of installation use and protected,
against the users, by double insulation per EN61010-1 and IEC61010-1 2 III 1000V; Pollution Degree 2. The meter also meets UL 61010-1,
nd
Edition (2004), CAN/CSA C22.2 No. 61010-1 2nd Edition (2004),
2 and UL 61010B-2-031, 1
nd
Edition (2001) to Category IV 600V and Category
st
Edition (2003)
Approvals UL CE UL Listed The UL mark does not indicate that this product has been
evaluated for the accuracy of its readings.
Copyright © 2007 Extech Instruments Corporation.
All rights reserved including the right of reproduction
in whole or in part in any form.
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