Amprobe ACD-10 PRO User manual

INSTRUCTION MANUAL
ACD-10 PRO & TRMS PRO
AMPROBE
®

1
Congratulations! You are now the owner of an AMPROBE Instrument. It has been
quality crafted according to quality standards and contains quality components and
workmanship. This instrument has been inspected for proper operation of all of its
functions. It has been tested by qualified factory technicians according to the
long-established standards of AMPROBE.
1) SAFETY
This manual contains information and warnings that must be followed for operating the
instrument safely and maintaining the instrument in a safe operating condition. If the
instrument is used in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired.
The meter meets the requirements for double insulation to IEC61010-2-032 (1994),
EN61010-2-032 (1995), UL3111-2-032 (1999).
ACD-10 PRO/TRMS PRO
Category II 600 Volts ac and dc.
Category III 300 Volts ac and dc.
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY
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.

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TERMS IN THIS MANUAL
WARNING identifies conditions and actions that could result in serious injury or
even death to the user.
CAUTION identifies conditions and actions that could cause damage or malfunction
in the instrument.
WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.
The meter is intended only for indoor use.
To avoid electrical shock hazard, observe the proper safety precautions when working
with voltages above 60 VDC or 30 VAC RMS. These voltage levels pose a potential
shock hazard to the user.
Inspect test leads, connectors, and probes for damaged insulation or exposed metal
before using the instrument. If any defects are found, replace them immediately.
Do not touch test lead tips or the circuit being tested while power is applied to the circuit
being measured. To avoid accidental short circuit of bare (uninsulated) hazardous live
conductors or busbars, switch them off before insertion and removal of the current clamp
jaws. Contact with the conductor could result in electric shock. Keep your hands/fingers
behind the hand/finger barriers that indicate the limits of safe access of the meter and the
test leads during measurement.
CAUTION
Disconnect the test leads from the test points before changing meter functions.

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INTERNATIONAL ELECTRICAL SYMBOLS
Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse
AC--Alternating Current
DC--Direct Current
2) CENELEC Directives
The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC.

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3) PRODUCT DESCRIPTION
This user's manual uses only representative model(s) for illustrations. Please refer
specification details for function availability to each model.
1) Transformer Jaw Clamp for AC
current magnetic field pick up
2) Hand/Finger Barrier to indicate the
limits of safe access of the meter
during measurement
3) Push-buttons for special functions &
features
4) Push-buttons for special functions &
features on Slide-switch Selector
functions
5) Input Jack for all functions EXCEPT
non-invasive ACA current function
6) Common (Ground reference) Input
Jack for all functions EXCEPT
non-invasive ACA current function
7) Slide-switch Selector to turn the
display power ON/OFF and Select a
function
8) 3-3/4 digits 4000 counts LCD display
9) Jaw trigger for opening the
transformer clamp jaw

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4) OPERATION
DC Voltage, AC Voltage, Hz Frequency functions
Inputs are made through the test leads terminals. Slide-switch on defaults at DC voltage.
Press SELECT button momentarily to select AC voltage.
Press the Hz push-button momentarily to activate Hz Frequency function in the following
slide-switch functions:
DCV & ACV via the test leads; ACA via the jaw clamp

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Note: DC 400.0mV range is designed with 1000MΩhigh input impedance for least
current drain in measuring small signals, and can cope better with most commercially
available voltage output transducers/adapters. The non-zero display reading is normal
when the meter inputs are open circuit, which will not affect actual measurement
accuracy. The meter will show close to zero reading when the inputs are shorted. Open
input is actually a floating condition, which is not a zero-volt-input condition.
Note: Hz input sensitivity varies automatically with function range selected while
activating the Hz function. Lowest range has the highest sensitivity, and the highest
range has the lowest sensitivity. Activating the Hz function while measuring the specific
function signal (auto ranging) can automatically select the best sensitivity range to avoid
electrical noise which may cause unstable Hz reading. However, if the Hz reading shows
zero due to insufficient sensitivity, activate the Hz function BEFORE measuring the
specific function signal. The meter is then in the lowest range and can select the highest
sensitivity.

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CAUTION
Measuring Resistance, Continuity, Diode or Capacitance function on a live circuit will
produce false results and may damage the instrument. In many cases the suspected
component must be disconnected from the circuit to obtain an accurate measurement
reading.

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ΩResistance, and Continuity functions
Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press
SELECT button momentarily to select Continuity function which is convenient for
checking wiring connections and operation of switches. A continuous beep tone
indicates a complete wire.
Diode test function
Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press
SELECT button momentarily 2 times to select Diode test function. Normal forward
voltage drop (forward biased) for a good silicon diode is between 0.400V to 0.900V. A
reading higher than that indicates a leaky diode (defective). A zero reading indicates a
shorted diode (defective). An OL indicates an open diode (defective). Reverse the test
leads connections (reverse biased) across the diode. The digital display shows OL if the
diode is good. Any other readings indicate the diode is resistive or shorted (defective).
Capacitance function
Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press
SELECT button momentarily 3 times to select Capacitance function. Relative zero
mode can be used to zero out the parasitic capacitance of the leads and the internal
protection circuitry of the meter when measuring low capacitance in the order of Pico
Farad (pF).
CAUTION
Discharge capacitors before making any measurement. Large value capacitors should
be discharged through an appropriate resistance load.

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ACA Current clamp-on function
Inputs are made through the jaws clamps for non-invasive ACA current measurements.
CAUTION
Press the jaw trigger and clamp the jaws around only one single conductor of a circuit for
load current measurement. Make sure the jaws are completely closed, or else it will
introduce measurement errors. Enclosing more than one conductor of a circuit will result
in differential current (like identifying leakage current) measurement.
Strong Electro-magnetic field environments such as high-current transformers, motors
and conductors may affect measurement accuracy.