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.

2

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.

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

3

2) CENELEC Directives

The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC.

4

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

4) OPERATION

5

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

6

Note: DC 400.0mV range is designed with 1000MΩ high 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.

7

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.

8

Ω

Resistance, 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.

SELECT

button momentarily 2 times to select

Press

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.
SELECT button momentarily 3 times to select

Press

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.

9

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.

HOLD

10

The hold feature freezes the display for later viewing. Press the

HOLD

button

momentarily to activate or exit this feature.

MAX

The max feature compares and displays the measured maximum value as fast as 30ms
with auto-ranging capability. Press the

MAX

button for 1 second or more to activate or

exit the max feature in the following functions: DCV, ACV & ACA

Relative zero

Relative zero

mode

mode allows the user to offset the meter consecutive measurements
with the displaying reading as the reference value. The display will now show readings
relative to the stored reference value. That is, display = reading - stored value. Press the

button momentarily to activate and to exit relative zero mode.

Auto-ranging

Where there is more than one measuring range under a selected meter function, the
LCD annunciator “a” turns on. The meter will automatically switch to the best resolution
range when making measurements. No manual ranging selection is required.

Auto Power Off (APO)

When the meter is on, the Auto Power Off (APO) feature will switch the meter into a sleep
mode automatically to extend battery life after approximately 30 minutes of the last front
panel activity. To wake up the meter from APO, press the buttons momentarily or set the
slide-switch to the OFF position and then slide back on again. Always set the slide-switch
to the OFF position manually when the meter is not in use.

5) MAINTENANCE

WARNING
To avoid electrical shock, disconnect the meter from any circuit, remove the test leads
from the input jacks and turn OFF the meter before opening the case. Do not operate
with open case.

11

Trouble Shooting

If the instrument fails to operate, check batteries and test leads etc., and replace as
necessary. Double check operating procedure as described in this user’s manual.

If the instrument voltage-resistance input terminal has been subjected to high voltage
transient (caused by lightning or switching surge to the system) by accident or abnormal
conditions of operation, the series fusible resistors will be blown off (become high
impedance) like fuses to protect the user and the instrument. Most measuring functions
through this terminal will then be open circuit. The series fusible resistors and the spark
gaps should then be replaced by qualified technician. Refer to the LIMITED WARRANTY
section for obtaining warranty or repairing service.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or
solvents. If the meter is not to be used for periods of longer than 60 days, remove the
batteries and store them separately.

Battery replacement

The meters use standard 3V alkaline button battery (ANSI/NEDA-5004LC, IEC-CR2032).
In models ACD-10 PRO & ACD-10 TRMS PRO, one battery are used.

Loosen the two screws from the case bottom and remove the bottom case. Slide the
battery out the side of the holder and replace with a new battery (observe polarity).
Replace the bottom case. Re-fasten the screws.

6) Specifications
General Specifications

Display : 3-3/4 digits 4000 counts LCD display(s)
Update Rate : 3 per second nominal
Polarity : Automatic
Low Battery Indication: Below approx. 2.4V
Operating Temperature : 0°C to 40°C
Relative Humidity : Maximum relative humidity 80% for temperature up to 31°C

decreasing linearly to 50% relative humidity at 40°C
Altitude : Operating below 2000m
Storage Temperature : -20°C to 60°C, < 80% R.H. (with battery removed)
Temperature Coefficient : nominal 0.15 x (specified accuracy)/°C @(0°C - 18°C or 28°C

- 40°C), or otherwise specified

12

Sensing : Average sensing for ACD-10 PRO. True RMS for ACD-10TRMS PRO
Safety : Meets IEC61010-2-032 (1994), EN61010-2-032 (1995), UL3111-2-032 (1999)
For ACD-10 PRO/TRMS PRO: Category II 600 Volts AC & DC, and Category III 300

Volts AC & DC
Transient protection : 6.5kV (1.2/50µs surge) for all models
Pollution degree : 2

E.M.C. : Meets EN61326 (1997, 1998/A1), EN61000-4-2 (1995), and EN61000-4-3

(1996)
In an RF field of 3V/m:
Capacitance function is not specified
Other function ranges: Total Accuracy = Specified Accuracy + 45 digits.
Performance above 3V/m is not specified
Overload Protections :
ACA Clamp-on jaws : AC 400A RMS continuous
“+” & “COM” terminals (all functions) : 600VDC/VAC RMS
Power Supply : 3V alkaline button battery (ANSI/NEDA-5004LC, IEC-CR2032). One

battery for ACD-10 PRO & ACD-10 TRMS PRO.
Power Consumption : 2.5 mA typical
APO Timing : Idle for 30 minutes

APO Consumption : 0.8µA typical on all functions except on ACD-10 TRMS PRO

Amps and Volts where it is 25µA
Dimension : L 7.8” X W 2.48” X H 1.25”
Weight : 0.412 Lb approx.
Jaw opening & Conductor diameter : 1.02” max
Accessories : Test leads (pair), battery installed, user's manual, & soft carrying pouch

Electrical Specifications

Accuracy is ±(% reading digits + number of digits) or otherwise specified, at 23°C ± 5°C
& less than 75% R.H.

1)

Model ACD-10 PRO TRMS. True RMS accuracy of ACV is specified from 5% to 100%

of range, and ACA is specified from 10% to 100% of range, or otherwise specified.
Maximum Crest Factor < 1.75 : 1 at full scale & < 3.5 : 1 at half scale, with frequency
components within the specified frequency bandwidth for non-sinusoidal waveforms.

DC Voltage: ACD-10 PRO/TRMS PRO
RANGE Accuracy

AC CURRENT: ACD-10 PRO/TRMS PRO
RANGE Accuracy

13

1)

400.0mV 0.3% + 4d

4.000V, 40.00V,

0.5% + 3d

400.0V
600V 1.0% + 4d
NMRR : >50dB @ 50/60Hz
CMRR : >120dB @ DC, 50/60Hz, Rs=1kΩ
Input Impedance : 10MΩ, 30pF nominal

(1000MΩ for 400.0mV range)

AC Voltage: ACD-10 PRO/TRMS PRO
RANGE Accuracy

1)

50Hz -- 500Hz

4.000V, 40.00V,

1.5% + 5d

400.0V
600V 2.0% + 5d

CMRR : >60dB @ DC to 60Hz, Rs=1kΩ
Input Impedance : 10MΩ, 30pF nominal

50Hz / 60Hz

40.00A 1.9% + 8d

400.0A 1.9% + 8d*
600A** unspecified
*Accuracy specified to 350A continuous, and
400A for 60 second max with 5 minutes cool
down interval
**Added range to indicate instantaneous
over-range current values

OHMS: ACD-10 PRO/TRMS PRO
RANGE Accuracy

400.0Ω

4.000kΩ, 40.00kΩ,

400.0kΩ

4.000MΩ

40.00MΩ
Open Circuit Voltage : 0.4VDC typical

Max Hold (where applicable)

Specified accuracy ± 50 digits for changes >

Diode Tester: ACD-10 PRO/TRMS PRO

25ms in duration

Open Circuit Voltage Test Current

Audible Continuity Tester
Audible threshold : between 20Ω and 120Ω.

Capacitance: ACD-10 PRO/TRMS PRO
RANGE* Accuracy**

500.0nF, 5.000µF,

50.00µF, 500.0µF,

3.5%*** + 6d

< 1.6 VDC 0.25mA

Hz Frequency: ACD-10 PRO/TRMS PRO
Function Sensitivity

400.0mV 150mV 10Hz -- 2kHz

4.000V 3.2V 5Hz -- 40kHz

3000µF

40.00V 25V 5Hz -- 100kHz

*Additional 50.00nF range accuracy is not

400.0V 100V 5Hz -- 100kHz

specified
**Accuracies with film capacitor or better
***Specified with battery voltage above 2.8V
(approximately half full battery). Accuracy
decreases gradually to 12% at low battery
warning voltage of approximately 2.4V

600V 400V 5Hz -- 5kHz

400.0A 55A 40Hz -- 400Hz
Display counts: 5000

Best resolution: 0.001Hz
Accuracy: 0.5%+4d

0.8% + 6d

0.6% + 4d

1.0% + 4d

2.0% + 4d

(Typical)

Range

(Sine RMS)

14

LIMITED WARRANTY

Your AMPROBE instrument has a limited warranty against defective materials and/or
workmanship for one year from the date of purchase provided that, in the opinion of the
factory, the instrument has not been tampered with or taken apart.

Should your instrument fail due to defective materials, and/or workmanship
during this one-year period, please have your dated bill of sale, which must
identify the instrument model number and serial number and call the number
listed below:

Repair Department

ATP - AMPROBE

MIRAMAR, FL

Tel: [phone]

www.amprobe.com

Advanced Test Products

Miramar, FL
Tel.: [phone]
Fax: [phone]

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