Extech EX230 Operating Manual
User's Guide
Multimeter with IR Thermometer
Extech EX230
Introduction
Congratulations on your purchase of the Extech EX230 Autoranging Multimeter. This meter
measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle,
Diode Test, and Continuity plus non-contact InfraRed Temperature and contact thermocouple
Temperature. 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
600V
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) 600 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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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 device. This device can cause interference in residential
areas.
• 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 must not be used by children. It contains hazardous objects as well as
small parts that the children could swallow.
• Do not leave batteries and packing material lying around unattended; they can be
dangerous to children.
• In the event that this device will be stored for an extended period of time, remove the
batteries.
• Expired or damaged batteries can be hazardous to skin. Use suitable hand gloves in
such cases.
• Do not short-circuit the battery. Do not place the battery near a fire.
EX230-EU-EN-V1.2-09/10 3
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 AC/DC, Resistance, Capacitance, Frequency,
Temperature, Duty Cycle, Diode Test, Continuity
μA or mA AC/DC 500mA fused
A AC/DC 10A fused
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.
600 VDC/AC rms
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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Controls and Jacks
1. IR Thermometer
2. Laser Pointer
3. 4000 count LCD
4. MAX button
5. MODE button
6. FUNCTION switch
7. mA, µA and 10A input jacks
8. IR Thermometer button
9. HOLD button
10. RANGE button
11. Positive input jack
12. COM input jack
Note: Tilt stand, test lead holders, and battery compartment are on rear of unit.
3
4
5
6
7
Symbols and Enunciators
Continuity
Diode test
n nano (10
µ micro (10
m milli (10
A Amps
k kilo (10
M mega (10
Ω Ohms
V Volts
AC Alternating current
DC Direct current
ºF Degrees Fahrenheit
ºC Degrees Centigrade
Hz Frequency
F Farad (Capacitance)
% Duty Cycle
AUTO Autoranging
HOLD Display hold
SCAN IR temperature and laser active
-9
) (amps, cap)
-6
) (amps, cap)
-3
) (volts, amps, cap)
3
) (ohms, Hz)
6
) (ohms, Hz)
12
8
9
10
11
12
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