User's Guide
True RMS Multimeter with IR Thermometer
Extech EX570
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.
WARNING |
This WARNING symbol indicates a potentially hazardous situation, which |
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if not avoided, could result in death or serious injury. |
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CAUTION
MAX |
1000V |
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
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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.
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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 |
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Function |
Maximum Input |
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V DC or V AC |
1000 VDC/AC rms |
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mA AC/DC |
500 mA 1000V fast acting fuse |
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A AC/DC |
10A 1000V fast acting fuse (20A for 30 seconds |
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max every 15 minutes) |
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Frequency, Resistance, Capacitance, |
1000 VDC/AC rms |
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Duty Cycle, Diode Test, Continuity |
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Temperature |
1000 VDC/AC rms |
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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.
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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
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1 |
3 |
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4 |
9 |
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5 |
10 |
6 |
11 |
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12 |
7 |
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13 |
8 |
14 |
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Note: Tilt stand and battery compartment are on rear of unit.
Symbols and Enunciators
•))) |
Continuity |
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Diode test |
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+ |
Low Battery |
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MEM |
Memory |
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n |
nano (10-9) (capacitance) |
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µ |
micro (10-6) (amps, cap) |
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m |
milli (10-3) (volts, amps) |
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A |
Amps |
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k |
kilo (103) (ohms) |
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F |
Farads (capacitance) |
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M |
mega (106) (ohms) |
APO |
Auto Power Off |
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Ω |
Ohms |
P |
Peak |
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Hz |
Hertz (frequency) |
V |
Volts |
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% |
Percent (duty ratio) |
REL |
Relative |
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AC |
Alternating current |
AUTO |
Autoranging |
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DC |
Direct current |
HOLD |
Display hold |
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ºF |
Degrees Fahrenheit |
ºC |
Degrees Centigrade |
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MAX |
Maximum |
MIN |
Minimum |
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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 V position.
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 V jack.
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 V jack.
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.
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EX570-ENG V2.3 3/09 |
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