ATD Tools ATD-5540 User Manual
ATD-5540
AUTOMOTIVE
MULTIMETER
INSTRUCTIONS
INSTRUCTION
MANUAL
Contents
Safety
Meter Basics
Meter Functions
Voltage(V) …………………………………………………
Resistance(
Diode Check( )
Audible Continuity( )
DC Current(A)
RPM( )
Frequency(Freq)
Dwell( )
Duty Cycle(%)
Maintenance
Fuse and Battery Replacement
Trouble Shooting
General Specications
Electrical Specications
Warranty Information
)
Ω
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Safety
Safety Cont ’d…
DANGER
Engines produce carbon monoxide which is
odorless, causes slower reaction time, and
can lead to serious injury. When the engine is
operating, keep service areas WELL
VENTILATED or attach the vehicle exhaust
system to the shop exhaust removal system.
Set the parking brake and block the wheels
before testing or repairing the vehicle. It is
especially important to block the wheels on
front-wheel drive vehicles; the parking brake
does not hold the drive wheels.
Wear an eye shield when testing or repair-ing
vehicles.
Exceeding the limits of this meter is dangerous.
lt will expose you to serious or possibly fatal
injury. Carefully read and understand the
cautions and the specification limits of this
meter.
Voltage between any terminal and ground
must not exceed 600V DC or 600V AC.
Use caution when measuring voltage above
25V DC or 25V AC.
Circuit tested must be protected by a 10A fuse or
circuit breaker.
Do not use the meter if it has been damaged.
Do not use the test leads if the insulation is damaged or if metal
is exposed.
Danger
Avoid electrical shock: do not touch the test
leads, tips or the circuit being tested.
Do not try a voltage measurement with the
test leads in the 10A or the mA terminal.
When testing for the presence of voltage or current, make sure
the meter is functioning correctly. Take a reading of a known
voltage or current before accepting a zero reading.
Choose the proper range and function for the measurement.
Do not try voltage or current measurements that may exceed
the ratings marked on the Function/Range switch or terminal.
When measuring current,connect the meter in series with the
load.
Never connect more than one set of test leads to the meter.
Disconnect the live test lead before disconnecting the common
test lead.
The mA and the 10A terminals are protected by fuses. To avoid
possible injury or damage, use only in circuits limited to DC 10A
for 60 seconds.
See also
Fuse Replacement
…
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Safety Cont’d…
IMPORTANT
To maintain accuracy of the meter, replace the discharged
battery immediately when the battery symbol appears on
the meter display.
Avoid measuring error from outside interference: keep the meter
away from spark plug or coil wires.
Avoid damaging the meter when testing voltage: disconnect the
test leads from the test points before changing functions.
Do not exceed the limits shown in the table below:
FUNCTION Terminal Input limit
DC Volts VHzΩ 600 Volts DC
Frequency 500 Volts AC/DC
Meter Basics
1. Display:
Large 3 1/2 digit (1999 counts) LCD display with low battery
indication.
2. Rotary Selector Switch:
Turn this switch to Select a function or turn the meter OFF.
3. Test Lead Terminals:
The Black test is used in the common(COM) terminal for all
Ohm(resistance)
①
★ 10 Amp measurement for 60 seconds maximum.
① Ohms can not be measured if voltage is present, ohms can be
measured only in a non-powered circuit. However, the meter is
protected to 250 volts
Diode
DC 10A 10A *10A AC/DC
RPM
Duty Cycle(%)
Dwell angle
VHz
Ω
500 Volts AC/DC
VHz
Ω
3 4
250 Volts AC/DC
rests. The Red test Lead is used to measure Amp or Volts.
Meter Functions-Voltage (DCV)
The meter will automatically select the
best voltage (V) range.
Insert:
Black lead in COM terminal.
V-
Red lead in
the Black probe to ground or to the
negative (-) circuit.
Touch the Red probe to the circuit coming
from the power source
IMPORTANT: voltage must be
measured in parallel (Red probe
measuring circuit from power source).
Accuracy
Selection of a lower range will move the
decimal point one place and increase
the accuracy. An “I” display means the
range is too low,select the next higher
range.
Ω
-RPM
terminal Touch
When measuring voltage,be
sure the Red test lead is in
the terminal marked “V”.If the
test lead is in an Amp (A)or
Milliampere (mA) terminal,
you may be injured or the
meter damaged.
WARNING
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