Extech 430 USER MANUAL, sem 3, Podstawy elektrotechniki i elektroniki, Laboratoria, sprzęt pomiarowy
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User's Guide
True RMS Multimeter
Extech 430
Introduction
Congratulations on your purchase of the Extech 430 (part number
EX430) 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. Proper use and care of this meter will
provide many years of reliable service.
Safety
WARNING
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)
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.
CAUTION
MAX
600V
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OVERVOLTAGE CATEGORY III
This meter meets the IEC 610-1-95 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/AC, 200Vrms on 400mV
range
mA AC/DC
500mA 250V fast acting fuse
A AC/DC
20A 250V 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.
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Controls and Jacks
1. 4000 count LCD display
2. HOLD
3. SELECTbutton
4. Functionswitch
5. mA, uA and A input jacks
6. COM input jack
7. Positiveinputjack
8. RANGE hold button
9. RELATIVEbutton
10. Backlight button
11. Protective holster
Note:
Tilt stand and battery compartment are on rear of unit.
Symbols and Annunciators
•)))
Continuity
Diode test
Battery status
Test lead connection
error
n
nano (10
-9
) (capacitance)
µ
micro (10
-6
) (amps, cap)
m
milli (10
-3
) (volts, amps) A
Amps
k
kilo (10
3
) (ohms)
F
Farads (capacitance)
M
mega (10
6
) (ohms)
Ω
Ohms
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
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Specifications
Function Range Resolution Accuracy
400mV 0.1mV
±
(0.3% reading + 2 digits)
4V
0.001V
40V
0.01V
±
(0.5% reading + 2 digits)
400V
0.1V
AC
Voltage
600V 1V
±
(0.8% reading + 3 digits)
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
400
µ
A 0.1
µ
A
4000
µ
A 1
µ
A
40mA 0.01mA
400mA 0.1mA
±
(1.5% reading + 3 digits)
4A
0.001A
±
(2.5% reading + 5 digits)
20A
0.01A
AC
Current
50 to 400Hz 400Hz to 1KHz
400
µ
A 0.1
µ
A
4000
µ
A 1
µ
A
40mA 0.01mA
400mA 0.1mA
±
(1.8% reading
+ 8 digits)
±
(3.0% reading
+ 7 digits)
±
(3.5% reading
+ 10 digits)
NOTE:
Accuracy is stated at 65
o
F to 83
o
F (18
o
C to 28
o
C) and less
than 75% RH.
4A
0.001A
±
(3.0% reading
+ 8 digits)
20A
0.01A
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DC
Voltage
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