Extech Instruments EX430A User manual
®
True RMS Multimeter
Extech EX430A
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USER MANUAL
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Introduction
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International Safety Symbols
WARNING
CAUTION
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WARNING
CAUTION
EX430A-en-GB_v6.0 7/16
3
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. Repair or replace any damage before use.
Use great care when making measurements if the voltages are greater than 25VAC rms or
35VDC. These voltages are considered a shock hazard.
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 children could swallow. In case a child swallows any of the parts,
please contact a physician immediately
Do not leave batteries and packing material unattended; they can be dangerous for children.
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 skin. Always use
suitable hand protection.
See that the batteries are not short-circuited. Do not put batteries into fire.
EX430A-en-GB_v6.0 7/16
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OVERVOLTAGE CATEGORY III
This meter meets the IEC 61010-1 (EN 61010-1), 2010, 3rd edition standard for OVERVOLTAGE
CATEGORY III. Cat III meters are protected against overvoltage transients in fixed installation at the
distribution level. Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.
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 600V DC and AC, 200Vrms on 400mV range
mA AC/DC 500mA 600V fast acting fuse
A AC/DC 10A 600V fast acting fuse (30 seconds max every 15
minutes)
Frequency, Resistance, Capacitance,
Duty Cycle, Diode Test, Continuity
250Vrms for 15sec max
Temperature 60V DC/24V AC
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 battery.
7. NEVER operate the meter unless the back cover and the battery and fuse covers are in place
and fastened securely.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
EX430A-en-GB_v6.0 7/16
13
Specifications
Function Range Resolution Accuracy
DC Voltage 400mV 0.1mV (0.3% reading + 2 digits)
4V 0.001V
(0.5% reading + 2 digits)
40V 0.01V
400V 0.1V
600V 1V (0.8% reading + 3 digits)
AC Voltage 50 to 400Hz 400Hz to 1kHz
400mV 0.1mV (1.5% reading + 15
digits)
(2.5% reading + 15digits)
4V 0.001V
(1.5% reading + 6
digits) (2.5% reading + 8 digits)
40V 0.01V
400V 0.1V
600V 1V (1.8% reading + 6
digits)
(3% reading + 8 digits)
DC Current 400A 0.1A
(1.5% reading + 3 digits)
4000A 1A
40mA 0.01mA
400mA 0.1mA
4A 0.001A (2.5% reading + 5 digits)
10A 0.01A
AC Current 50 to 400Hz 400Hz to 1KHz
400A 0.1A
(1.8% reading + 8
digits) (3.0% reading + 7 digits)
4000A 1A
40mA 0.01mA
400mA 0.1mA
4A 0.001A (3.0% reading + 8
digits)
(3.5% reading + 10
digits)
10A 0.01A
Resistance 4000.1
(0.8% reading + 4 digits)
4k0.001k
(0.8% reading + 2 digits)
40k0.01k
(1.0% reading + 2 digits)
400k0.1k
4M0.001M
40M0.01M
(3.0% reading + 5 digits)
Capacitance 40nF 0.01nF (5.0% reading + 7 digits)
400nF 0.1nF (3.0% reading + 5 digits)
4F 0.001F (3.5% reading + 5 digits)
40F 0.01F
100F 0.1F (5.0% reading + 5 digits)
NOTE: Accuracy is stated at 18oC to 28oC (65oF to 83oF) and less than 75% RH.
EX430A-en-GB_v6.0 7/16
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Function Range Resolution Accuracy
Frequency 5.000Hz 0.001Hz (1.5% reading + 5 digits)
50.00Hz 0.01Hz
500.0Hz 0.1Hz
(1.2% reading + 2 digits)
5.000kHz 0.001kHz
50.00kHz 0.01kHz
500.0kHz 0.1kHz
5.000MHz 0.001MHz (1.5% reading + 4 digits)
10.00MHz 0.01MHz
Sensitivity: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5Vrms min @ 20% to 80% duty
cycle and > 100kHz.
Duty Cycle 0.1 to 99.9% 0.1% (1.2% reading + 2 digits)
Pulse width: 100µs - 100ms, Frequency: 5Hz to 150kHz
Temp
(type-K)
-20 to 750 C1C (3.0% reading + 3 digits)
(probe accuracy not included)
-4 to 1382 F 1 F
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.
Diode TestTest current of 0.3mA maximum, open circuit voltage 1.5V DC typical
Continuity Check Audible signal will sound if the resistance is less than 150(approx.),
test current <0.7mA
Temperature Sensor Requires Type-K thermocouple
Input Impedance >7.5MΩ(VDC & VAC)
AC Response True rms
ACV Bandwidth 50Hz to 1kHz
Display 4000 count backlit LCD
Over-range indication “OL” is displayed
Auto Power Off 15 minutes (approximately)
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; 500mA/600V ceramic fast blow
A range; 10A/600V ceramic fast blow
Operating Temperature 5ºC to 40ºC (41ºF to 104ºF)
Storage Temperature -20oC to 60oC (-4oF to 140oF)
Operating Humidity Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC(104ºF)
Storage Humidity <80%
Operating Altitude 2000 meters (7000ft) maximum.
Weight 342g (0.753lb) (includes holster).
Size 187 x 81 x 50mm (7.36” x 3.2” x 2.0”) (includes holster)
Safety For indoor use and in accordance with the requirements for double
insulation to IEC 61010-1 (EN 61010-1), 2010, 3rd edition for
Overvoltage Category III 600V, Pollution Degree 2.
EX430A-en-GB_v6.0 7/16
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REPLACING THE FUSES
WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads
from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter
with an open case.
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 four “A” screws securing the rear cover.
5. Lift the center circuit board straight up from the
connectors to gain access to the fuse holders.
6. Gently remove the old fuse and install the new fuse
into the holder.
7. Always use a fuse of the proper size and value
(0.5A/600V fast blow for the 400mA range,
10A/600V fast blow for the 10A range).
8. Align the center board with the connectors and gently press into place.
9. 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.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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