Extech Instruments EX570 Manuale utente

User's Guide

True RMS Multimeter with

IR Thermometer

Extech EX570

Byram Labs

EX570-ENG V2.3 3/09

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

Byram Labs

EX570-ENG V2.3 3/09

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.

Byram Labs

EX570-ENG V2.3 3/09

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.

Byram Labs

EX570-ENG V2.3 3/09

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

Ω 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

Byram Labs

EX570-ENG V2.3 3/09

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.

Byram Labs

EX570-ENG V2.3 3/09

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 Ωjack.

3. Press the SELECT 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.

Byram Labs

EX570-ENG V2.3 3/09

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 Ωjack.

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 35Ω, 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.

Byram Labs

EX570-ENG V2.3 3/09

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.

Byram Labs

EX570-ENG V2.3 3/09

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.

Byram Labs

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