Megger AVO410 Manual de usuario
2
G SAFETY WARNINGS
Safety warnings must be read and understood before instrument is used.
The following safety information must be observed to insure maximum
personal safety during the operation of this meter:
■Do not use in wet environments.
■ Measurements beyond the maximum selected range must not be attempted.
■Extreme care must be taken when measuring above 50 V, especially on live
bus-bars.
■ To measure voltage, the instrument must not be switched to a current or
resistance range, or to the diode check or buzzer position.
■Circuits must be de-energised and isolated before carrying out resistance
tests.
■ The rotary selector switch must only be turned after removing test
connections.
■ All external voltages must be disconnected from the instrument before
removing the battery.
■Test leads and prods must be in good order, clean, and with no broken or
cracked insulation.
■ UK Safety Authorities recommend the use of fused test leads when measuring
voltage on high energy systems.
■ Replacement fuses must be of the correct type and rating.
■ The instrument must not be used if any part of it is damaged.
■ Check for correct instrument operation by testing a known voltage before
and after use. Do not use if misleading results are obtained.
■Warnings and precautions must be read and understood before an instrument
is used. They must be observed during the operation of this instrument.
Note
This instrument must only be used by suitably trained and competent persons
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Safety warnings ............................................................................................ 2
Symbols used on instrument ........................................................................ 3
Introduction ................................................................................................. 4
Operation ..................................................................................................... 5
Specifications ............................................................................................. 10
Manual de l’utilisateur ............................................................................... 16
Bedienungsanleitung ................................................................................. 30
Manual del usuario .................................................................................... 44
Symbols used on the instrument are:
F Caution: risk of electric shock
G Caution: refer to accompanying notes
t Equipment protected throughout by Double Insulation (Class II)
c Equipment complies with current EU directives.
Contents
4
Introduction
Thank you for purchasing the Megger AVO410 Digital Multimeter.
For your own safety and to get the maximum benefit from your instrument,
please ensure that you read and understand the safety warnings and
instructions before attempting to use the instrument.
The AVO410 is aimed at providing electricians with a rugged, easy to use
multimeter for field use. Functions include voltage, current and resistance; in
addition, there are extra functions that may also appeal to electrical and
electronic engineers. The instrument features automatic or manual selection of
ranges, True RMS readings and a CATIV 600 V safety rating.
Unpacking and inspection
Upon removing your new digital multimeter from its packing, you should have
the following items.
1. Digital multimeter.
2. Test lead set (one black, on red)
3. User manual.
4. Protective holster.
Symbols and annunciators
Continuity A
BAT Low battery
Diode test
HOLD Data hold
AUTO Auto-ranging
AC Alternating current or voltage
DC Direct current or voltage
MAX/MIN Stores the highest or lowest measurement
J Backlight
V Volts
A, mA,uA Current range
▲
5
Meter description
1. 6000 counts LCD display.
2. Push buttons for features
3. Selection switch
4. Input terminal for A current selection (Red)
5. Input terminal for all other functions (Red)
6. COM (Black) common or ground reference input terminal for all functions.
Features
1
2
3
4
5
6
6
Operation
AC VOLTAGE MEASUREMENTS
1. Set the function switch to the V AC position (AUTO, T-RMS and AC volts will
appear on the display).
2. Insert the black test lead in the COM jack and the red test lead into the V
jack.
3. Connect the test probe tips to the circuit under test.
4. Read the voltage on the display.
DC VOLTAGE MEASUREMENTS
1. Set the function switch to the V DC position (AUTO and DC volts will be
appear on the display).
2. Insert the black test lead into the COM jack and the red test lead into the V
jack.
3. Connect the test probe tips to the circuit under test. Be sure to observe the
correct polarity (red lead to positive, black lead to negative)
4. Read the voltage on the display. If the polarity is reversed, the display will
show (-) minus before the reading.
RESISTANCE (Ω) MEASUREMENTS
1. Set the function switch to the Ω position (AUTO and MΩ will appear on the
display).
2. In addition, O.L will be displayed indicating an open circuit.
3. Insert the black test lead into the COM jack and the red test lead into the Ω
jack.
4. Connect the test probe tips to the circuit under test.
5. According to measured value the reading will be in Ω, k Ω or MΩ.
Note: The AVO410 provides an open circuit voltage <-1.5 V to the circuit under
test which will cause transistor junctions to conduct so it is advisable to
disconnect the item to be tested from the circuit to obtain an accurate reading.
DIODE / CONTINUITY TESTS
WARNING: To avoid electric shock never test a diode or conduct a continuity
test on an energized circuit.
1. Set the function switch to the diode/continuity position. (The diode and V
symbols will appear).
2. In addition, .OL will be displayed indicating an open circuit.
3. Insert the black test lead into the COM jack and the red test lead into the Ω
jack.
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4. For continuity connect the test probes to the cable or circuit to be tested.
(Polarity is not important).
5. The AVO410 will emit a tone if continuity is below 500 Ω / .OL with no
tone will indicate either open circuit or continuity above 500 Ω.
6. For diode testing connect the test probe tips to the diode or semiconductor
junction and note the reading.
7. Reverse the probe polarity by switching probe position and note this
reading.
8. The diode or junction can be evaluated as follows:
a. If one reading shows a value and the other reading shows .OL, the
diode is good.
b. If both readings show .OL, the device is open circuit.
c. If both readings are very small or zero, the device is shorted.
DCµA MEASUREMENTS (6000 µA max.)
1. Set the function switch to the DCµA position. (AUTO and DCµA will be
displayed).
2. Insert the black test lead into the COM jack and the red test lead into the
µA jack.
3. Remove power from circuit under test, then open circuit at a convenient
point where current is to be measured.
4. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.
5. Carefully apply the power
6. Read the measured on the display.
7. Remove supply before removing test leads and reconnecting circuit.
CAPACITANCE MEASUREMENTS
WARNING: To avoid damage to the instrument. Before testing, discharge the
capacitor/s to be tested.
1. Set the function switch to the capacitor position (AUTO and nF will be
appear on the display).
2. Insert the black test lead into the COM jack and the red test lead into the
capacitance jack.
3. Connect the test probe tips to the capacitor under test. Be sure to observe
the correct polarity if the capacitor is an electrolytic / polarised type. Red
to positive and black to negative.
4. Read the value on the display.
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FREQUENCY MEASUREMENTS
1. Set the function switch to the Hz position (AUTO and Hz will appear on the
display).
2. Insert the black test lead in the COM jack and the red test lead into the Hz
jack.
3. Connect the test probe tips to the circuit under test.
4. Read the frequency on the display.
AC CURRENT MEASUREMENTS
1. Set the function switch to the AC A position. (AUTO, T-RMS and AC A will
appear on the display).
2. Insert the black test lead into the COM jack and the red test lead into the A
jack.
3. Remove power from circuit under test, then open circuit at a convenient
point where current is to be measured.
4. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.
5. Carefully apply the power
6. Read the measured on the display.
7. Remove supply before removing test leads and reconnecting circuit.
DC CURRENT MEASUREMENTS
1. Set the function switch to the DC A position. (AUTO and DC A will appear
on the display).
2. Insert the black test lead into the COM jack and the red test lead into the A
jack.
3. Remove power from circuit under test, then open circuit at a convenient
point where current is to be measured.
4. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.
5. Carefully apply the power
6. Read the measured on the display.
7. Remove supply before removing test leads and reconnecting circuit.
FEATURE BUTTONS
BACKLIGHT
The AVO410 has a backlit display for all the different functions which has an
auto off in 60 seconds.
9
MIN MAX
The MIN MAX function enables the user to display both a minimum
and a maximum measured reading. To activate, first select a function
and make a measurement. Press the MIN MAX button to store the
maximum reading. Should the value increase then the new value will
be stored. Pressing the MIN MAX button once more will switch the
instrument display to minimum reading.
Pressing the HOLD button while in MIN MAX mode will stop the
AVO410 updating the maximum and minimum displayed reading.
Holding down the MIN MAX button for >1 sec. will switch the
function off.
HOLD
Press the HOLD button to freeze the reading on the display. The MIN
MAX function is unavailable when the Hold is active.
RS-232
With an optional USB adapter and software the AVO410 can be
utilised with a computer to provide a virtual multimeter mode.
RANGE
When any of the individual functions are first selected the unit will
be in the auto ranging mode.
Each successive press of the range button will enable the operator to
manually choose a required range.
AUTO POWER OFF / DISABLE
If the meter is idle for more than 10 minutes, the meter automatically
turns the display off. During this off time the last reading on the
meter is stored. The AVO410 can be restored by pressing any button.
To disable the power off function simultaneously hold down the
MIN MAX, RS232 and Range buttons and switch instrument to
required function.
10
MAINTENANCE
To clean the instrument, do not immerse in water, periodically wipe the case
with a damp cloth and mild detergent. Dirt in the terminals may affect readings.
Remove the battery if the AVO410 is not to be used for a long period of time.
When the low battery symbol appears on the display, replace the battery.
To replace battery remove instrument from black boot and unscrew two
screws on battery cover to reveal battery.
An internal user replaceable fuse can be accessed for replacement by unscrewing
the four deep recess screws. Carefully separate the two halves of the tester
taking care of battery lead. Use only the recommended replacement fuse
(10 A 500 V 32 mm).
SPECIFICATIONS
General Specifications
Display: 6000 counts updates 1.5/sec.
Polarity indication: Automatic, positive implied, negative indicated
Overrange indication: “OL” or “-OL”
Low battery indication: Displayed when the battery voltage drops below
operating voltage
Auto power off: Approx 10 minutes
Operating ambient:
Non-condensing ≤10 °C, 11 °C ~ 30 °C (≤80% R.H)
31 °C ~ 40 °C (≤75% R.H), 41 °C ~ 50 °C (≤45%
R.H)
Storage temperature: -20 ºC to 60 ºC, 0 to 80% R.H. when battery removed
from meter
Temperature coefficient: 0.15 x (Spec.Acc’y) / ºC, <18 ºC or > 28 ºC
Power requirements: Standard 9V battery NEDA 1604, IEC6F22, JIS006P
Battery life: Alkaline 300 hours
Dimensions (W x H x D): 76 mm x 158 mm x 38 mm without
holster
82 mm x 164 mm x 44 mm with holster
Weight: 522 g
When the low battery symbol appears on the display, replace the battery.
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