Extech Instruments EX570 Manual de usuario

User's Guide

True RMS Multimeter with

IR Thermometer

Extech EX570

EX570-EU-EN-V2.5-5/12

Introduction

Congratulations on your purchase of the Extech EX570 True RMS Autoranging Multimeter. This meter

measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode

Test, and Continuity plus Thermocouple Temperature and InfraRed 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.

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.

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

WARNING

CAUTION

MAX

1000V

EX570-EU-EN-V2.5-5/12

CAUTIONS

Improper use of this meter can cause damage, shock, injury or death. Read and understand

this user manual before operating the meter.

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 operating the

meter.

Use great care when making measurements if the voltages are greater than 25 VAC rms or 35

VDC. These voltages are considered a shock hazard.

Warning! This is a class A equipment. This equipment can cause interferences in the living

quarters; in this case the operator can be required to carry out adequate measures.

Always discharge capacitors and remove power from the device under test before performing

Diode, Resistance or Continuity tests.

Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty

of connection to the recessed electrical contacts. Other means should be used to ensure that

the terminals are not "live".

If the equipment is used in a manner not specified by the manufacturer, the protection provided

by the equipment may be impaired.

This device is not a toy and must not reach children’s hands. It contains hazardous objects as

well as small parts that the children could swallow. In case a child swallows any of them,

please contact a physician immediately

Do not leave batteries and packing material lying around unattended; they can be dangerous

for children if they use them as toys

In case the device is going to be unused for an extended period of time, remove the batteries

to prevent them from draining

Expired or damaged batteries can cause cauterization on contact with the skin. Always,

therefore, use suitable hand gloves in such cases

See that the batteries are not short-circuited. Do not throw batteries into the fire.

EX570-EU-EN-V2.5-5/12

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 1000 VDC/AC rms

mA AC/DC 500 mA 1000V fast acting fuse

A AC/DC 10A 1000V fast acting fuse (20A for 30 seconds max

every 15 minutes)

Frequency, Resistance, Capacitance,

Duty Cycle, Diode Test, Continuity 1000 VDC/AC rms

Temperature 1000 VDC/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.

EX570-EU-EN-V2.5-5/12

Controls and Jacks

1. IR Thermometer

2. Laser Pointer

3. 40,000 count LCD

4. MAX/MIN button

5. MEMORY button

6. SELECT button

7. Function switch

8. mA, µA and 10A input jacks

9. PEAK and RELATIVE button

10. RANGE button

11. HOLD and (Backlight) button

12. IR Thermometer button

13. Positive input jack

14. COM input jack

Note: Tilt stand and battery compartment are on rear of unit.

Symbols and Enunciators

•))) Continuity

Diode test

+Low Battery

MEM Memory

n nano (10-9) (capacitance)

µ micro (10-6) (amps, cap)

m milli (10-3) (volts, amps)

A Amps

k kilo (103) (ohms)

F Farads (capacitance)

M mega (106) (ohms) APO Auto Power Off

 Ohms P Peak

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

EX570-EU-EN-V2.5-5/12

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.

AC/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. Rotate the function switch to the Vposition.

2. Press the SELECT button to display “DC” or “AC” on the LCD

3. Insert the black test lead banana plug into the negative COM jack. Insert the

red test lead banana plug into the positive Vjack.

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.

5. Read the voltage in the display.

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.

1. Rotate the function switch to the mV DC-AC position.

2. Insert the black test lead banana plug into the negative COM jack.

Insert the red test lead banana plug into the positive Vjack.

3. Press the SELECT button to select “DC” or “AC” millivolts.

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.

5. Read the voltage in the display.

EX570-EU-EN-V2.5-5/12

AC/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 black test lead banana plug into the negative COM jack.

2. For current measurements up to 4000µA DC, set the function switch to the µA

position and insert the red test lead banana plug into the µA/mA jack.

3. For current measurements up to 400 mA DC, set the function switch to the 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

10A/HZ/% position and insert the red test lead banana plug into the 10A jack.

5. Press the SELECT button to indicate “DC” or “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 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.

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. Rotate the function switch to the Ωposition.

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 SELECT button to indicate “”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.

EX570-EU-EN-V2.5-5/12

CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on circuits or wires that have

voltage on them.

1. Rotate the function switch to the Ωposition.

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 SELECT button to indicate“ "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. Rotate the function switch to the green Ωposition.

2. Insert the black test lead banana plug into the negative COM jack and the red

test lead banana plug into the positive Vjack.

3. Press the SELECT 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.

EX570-EU-EN-V2.5-5/12

NON-CONTACT INFRARED TEMPERATURE MEASUREMENTS

1. Rotate the function switch to the IR position.

2. Press the SELECT button to select °F or °C.

3. Aim the infrared sensor (top of meter) at the surface to be measured.

4. Press the IRT button to turn on the IR thermometer and laser pointer. The laser pointer

identifies the surface spot to be measured.

5. The area of the surface to be measured must be larger than the spot size as determined by the

distance to spot size specification.

6. Read the temperature in the display. When the IRT button is released the displayed

temperature will be held for approximately 10 seconds.

WARNING: Do not directly view or direct the laser pointer 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.

IR Spot to Distance Diagram

The 30:1 spot to distance ratio determines the size of the measured surface area with respect to the

distance the meter is held away from the surface.

IR Measurement Notes

1. The object under test should be larger than the spot (target) size calculated by the field of view

diagram.

2. If the surface of the object under test is covered with frost, oil, grime, etc., clean before taking

measurements.

3. If an object's surface is highly reflective, apply masking tape or flat black paint to the surface

before measuring.

4. The meter will not make measurements through glass.

5. Steam, dust, smoke, etc. can obscure measurements.

6. To find a hot spot, aim the meter outside the area of interest then scan across (in an up and

down motion) until the hot spot is located.

EX570-EU-EN-V2.5-5/12

THERMOCOUPLE TEMPERATURE MEASUREMENTS

1. Rotate the function switch to the TYPE K position.

2. Insert the Temperature Probe into the input jacks, making sure to observe

the correct polarity.

3. Press the SELECT 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.

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.

Note: The temperature range of the supplied thermocouple probe is -20 to 250°C (-4 to 482°F)

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. Rotate the function switch to the 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 Vjack.

3. Touch the test leads to the capacitor to be tested.

4. Read the capacitance value in the display

FREQUENCY (DUTY CYCLE) MEASUREMENTS

1. Rotate t the function switch to the Hz/% position.

2. Insert the black lead banana plug into the negative COM jack and the red test

lead banana plug into the positive Hz jack.

3. Touch the test probe tips to the circuit under test.

4. Read the frequency on the display.

5. Press the SELECT button to indicate “%”.

6. Read the % duty cycle in the display.

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