Amprobe ACD-330T User Manual

Miramar, FL

Phone: [phone]

Fax: [phone]

www.amprobe.com

USER MANUAL

A UNIQUE CLAMP-ON MULTIMETER

MODEL: ACD-330T

C US

LISTED

LIMITED WARRANTY

Congratulations! Your new instrument has been

quality crafted according to quality standards and contains
quality components and workmanship. It has been inspect­ed for proper operation of all of its functions and tested by
qualified factory technicians according to the long­established standards of our company.

Your 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,a no charge
repair or replacement will be made to the original purchas­er. 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

Phone:[phone]

Fax:[phone]

Website:www.amprobe.com

Please obtain an RMA number before

returning product for repair.

Outside the U.S.A. the local representative will assist you.
Above limited warranty covers repair and replacement of
instrument only and no other obligation is stated or implied.

ACDC-3000

TABLE OF CONTENTS

SAFETYINFORMATION 1

• INTRODUCTION 2

USING THE METER SAFELY 4
LCD DISPLAYILLUSTRATION 5
GETTING ACQUAINTED WITH YOUR METER 6

•ALIGNMENTMARKS 6

•ROTARY SWITCH 6

•INPUTTERMINAL 7

•PUSH BUTTONS 8

PUSH-BUTTON OPERATIONS 9
POWER-ON OPTIONS 11
SPECIALFUNCTIONS INSTRUCTION 11

•Dynamic Recording 12

•Data Hold 12

•Zero (Relative) 14

•Analog Bargraph 15

•Auto Power Off and Sleep Mode 16

•Disable Auto Power Off 17

•Demonstrate Annunciator 17

•Continuity Function For Ohms Measurement 17

•1 ms Peak Hold 18

•Backlit LCD for easy reading in the dark 19
HOW TO OPERATE 19

• AC CURRENTMEASUREMENT 19

• DISTRIBUTION TRANSFORMERS MEASUREMENT 21

• ADJUSTABLE SPEED MOTOR CONTROLLERS 23

• AC MOTOR CURRENTMEASUREMENT 25

• AC VOLTAGE MEASUREMENT 27

• RESISTANCE/ CONTINUITYMEASUREMENT 28

• DIODE CHECK 29

GENERALSPECIFICATIONS 30
ACCESSORIES AND REPLACEMENT PARTS 30
ELECTRICALSPECIFICATIONS 31
CURRENTHARMONICS THEORY 33

• TRUE RMS MEASUREMENTS 34

• WAVEFORM COMPARISON 35

MAINTENANCE 37

• SERVICE 37

• BATTERY REPLACEMENT 37

• CLEANING 37

SAFETY INFORMATION

SAFETY INFORMATION

To ensure that youuse the meter safety, follow the safety guidelines listed below.

• This meter is for indoor use, altitude up to 2000m..

•Avoid working alone. Take precautions when working around moving parts.

• Use extreme caution what working around bare conductors or him bars. Accidental
contact with the conductor could result in electric shock.

• Use the meter only as specified in this manual. Otherwise, the protection provided by
the meter may be impared.

• Never measure current while the test leads are inserted into the input terminals.

• Do use the meter if it looks damaged.

• Inspect the leads for damaged insulation or exposed metal. Check test leads continuity.
Replace damaged leads.

• Disconnect the power and discharge all high-voltage capacitors before testing in the
resistance, continuity, and diode function.

• Use caution when working above 60VDC or 30VAC RMS, Such voltages pose a
shock hazard.

• When making measurements, keep your fingers behind the finger guards, on the probe.

• Set the proper function and range before attaching the meter to circuit. To avoid
damaging the meter disconnect the test leads from test points before changing functions.

• Read this operation manual completely before using the meter and follow all
safety instructions.

• The meter is safety-certified in compliance with UL311-1, C22.2 NO.1010.1-92 and
EN61010 (IEC1010-1, IEC 1010-2-031, IEC 1010-2-032). Installation Category II 1000V
or Installation Category III 600V. In order to maintain its insulation properties, please be
sure to use with ULListed Category II 1000Vor Category III 600V p r o b e s .

• Installation Category (CAT) II is an environment with smaller transient over voltage than
Installation Category III.

• CE requirement: Under the influence of R.F. field according to standard, the supplied test
leads will pick up induced noise. To have better shielding effect, a short test lead should
be used. The following tests are required in order to conform to CE:

1. IEC 801-2:ESD (electro static discharge) test.

2. IEC 801-3:RFI (Radio Frequency Interference) test.
Condition: 27

3. IEC 801-4:EFT(electro fast transient) test.

4. EN 55011: EMI (electro magnetic interference) test.

5 0 0 M HZ, signal intensity is 3 volts per meter.

˜ ˜

1

A UNIQUE CLAMP-ON MULTIMETER

INTRODUCTION

Measuring current accurately is a difficult job in today's industrial plants and commercial
buildings. An increasing number of personal computers, adjustable speed motor drives,
and other types electronic equipment come on-line every day. These, devices draw cur­rent in short pulses, and are referred to as non-linear loads.

Non-linear loads draw high peak -currents, causing harmonies in the load current. This
may result in unexplained circuit breaker tripping, or dangerous overheating of neutral
conductors and transformers. Currents containing harmonics, can only be accurately
measured with a true-rms meter or Clamp meter.

This CLAMP-ON MULTIMETER is shown in Figure 1. This meter his many functions
which, are shown below:

• TRUE RMS measurement fornon-linearand traditional loads.

• 1 ms Peak Hold feature to capture glitch orin-rush current.

• Dual Display Mode: Current vs Frequency or Voltage vs Frequency.

• Diode measurement.

• Dynamic Recording helps to record the variation of tests.

• Hand Guard forprevention of accidental contact with conductors.

• Carrying case with shoulderstrap.

• Data Hold to freeze displayed digital value.

• Relative (zero) function.

• Auto and Manual Ranging.

• Backlit display foreasy reading in dark places.

2

Diode check.

Ohm measurement

Voltage measurement

Current measurement.

1ms Peak Hold for
glitch capture.

Dual display V/ frequency
or A/ frequency.

Hand guard design
for more safety.

Dynamic recording
helps to record the
variation of tests.
And one touch DATA
HOLD.

Rotary switch for easy
operation.

Dual display to indicate the
V/ frequency or A/
frequency simultaneously.

Backlit display for
easy reading in the
dark place.

AUTO/MANUALSELECT.

Relative (ZERO)
mode for deviation
measurements.

Figure 1. A Unique Clamp-ON Multimeter

3

USING THE METER SAFELY

WARNING

Read “SAFETYINFORMATION” before using the meter.

NOTE

Some typical tests are provided in this manual. These tests are designed to help you under­stand how to use the Meter. Consult original manufacturer service manual for the test pro­cedures that apply to your particular piece of equipment.

Your Clamp-on multimeter is a hand-held, battery-operated instrument for testing and
troubleshooting electrical and electronic systems. If the meter is damaged or something is
missing, contact the place of purchase immediately.

AWARNING identifies conditions and actions that pose hazard(s) to the user; a CAU­TION identifies conditions and actions that may damage the Meter. International electri-

cal symbols used are explained in Table 1.

AC ~ Alternating Current
DC ~ Direct Current

AC and DC ~ Alternating and Direct Current
Ground
Double Insulation

See Explanation in the Manual

Table 1. International Electrical Symbols

FRENCH WARNING

This meter has a warning on the bottom chassis case that needs to be followed prior to opening
the case. We have transfered this to French translation as listed below:

ATTENTION
POUR EVITER UN CHOC ELECTRIQUE,
ENLECER LES CORDONS D’ESSAI AVANT
D’OUVRIR LE BOITIER.

NE BAS UTILISER LORSQUE LE BOITIER
ESTOUVERT

4

LCD DISPLAYILLUSTRATION

1) - : Negative Polarity Annunciator

2) @OFF : Auto Power Off Enabled Annunciator

3) : Low Battery Annunciator

4) DC : Direct Voltage Annunciator

5) AC : Alternating Current or Voltage

6) AUTO : Indicates AUTO range mode Annunciator

7) DΗ : Data hold annunciator

8) DΗ MAX : Peak Hold annunciator (1 mS response)

9) MAX AVG MIN : Dynamic recording mode, Present Reading

10) MAX :

Maximum reading

11) MIN : Minimum reading

12) AVG :Average reading

13)

•

))) : Continuity function annunciator

14) : Diode Measurement

15) kHz : Unit of frequency

16) V : Unit of voltage measurement

17) A : Unit of Current measurement

18) kΩ : Unit of resistance (ohm) measurement

19) ∆ : Zero (delta) mode annunciator

20) 8.8.8.8 : Digital display for A, V,

21) 8

000 8000

IIIIIIIIIIII with scale indicator

: Analog bar-graph annunciator

22) - 8.8.8.8 : Digital display for frequency

Annunciator

Ω, and diode

Figure 2. LCD Display

5

Getting Acquainted With Your Meter

ALIGNMENT MARKS

Conductor

MARK

Mark

MARK

Protective
Hand Guard

Figure 3. Alignment Marks

In order to meet the meter accuracy specifications when making a current measurement,
the conductor must be inside the jaws and centered within the indicated marks as much
as possible. (see Figure 3)

Rotary Switch

To turn the meter on and select a function, turn the rotary switch (Figure 4) to a switch
setting.The whole display lights for one second.

Then the meter is ready for use. (If you press and hold down any pushbutton while turn­ing the meter from OFF to ON, the display remains, lit until the pushbutton is released.)

1) Power Off Position

2) AC Current measurements.

3) AC or DC Voltage.Default is AC voltage.

4) Ohms and Continuity. The continuity buzzer sounds when test value that is

displayed is below 100 counts.

5) Diode and Audible Continuity measurements.

•

5

)))

4 •))) Ω
3 H V
2 H A
1

OFF

Figure 4. Rotary Switch

6

INPUT TERMINAL

WARNING

To avoid damaging the meter, do not exceed input limits shown below in Table 1:

ROTARY SWITCH

FUNCTION

AC 400 ~ 1000V(CAT II)
AC 400 ~ 600V (CAT III)
DC 400 ~1000V(CAT II)
DC 400 ~600V (CAT III)
AC 400 ~ 1000A
OHM (Ω)
DIODE (

•))))

INPUT

TERMINAL

V-Ω- & COM

Clamp Jaw

V-Ω- & COM

INPUTLIMIT

CAT II

1000VAC/ 1000VDC

CAT III

600V

1000ARMS

600VRMS

Table 1. Input limit Specifications

The meter has two input terminals (Figure 5) that are protected against overloads to the
limits shown in the specifications.

1) Common terminal for all measurements (except current).

2) Volts, Ohms, Diode, measurements.

1

2

Figure 5. Input Terminal

7

1. Press to select
DC or AC.
Press and hold for
more than 1 second
to toggle, between
PEAK and DC
or AC.

2. Press to toggle

Continuity(•))))ON/OFF
for ohm measurement.
Press to set
frequency
measurements.
In V or A range.

Figure 6. Push Buttons

8

3. Press to toggle
“DH” ON/OFF.

4. Press and hold
for more than
1 second to
set Dynamic
Recording then
press to step
through MAX,MIN,
AVG and present
reading.

6. In manual range
press to step up 1
range at a time.
Press and hold for 1
sec to select Auto
range

5. Press to toggle the
Relative (ZERO)
mode ON/OFF.

Push-button Operations

The operation of the push-buttons are outlined below.When a button is pushed, an annun­ciator lights, and the unit beeps. Turning the rotary switch to another switch setting resets
all push buttons to their default states. The pushbuttons are shown in Figure 6 (Page 08).

1. Shift / Peak m:

• This push-button is used for selecting the measurement of either an Alternating or
Direct source, or for selecting the PEAK hold function.

• Press this button momentarily to toggle DC and AC voltage test.

•To select PEAK hold, press and hold this button until the display shows " DH MAX"
and indicates the PEAK hold mode.

2. Hold m : DATAHOLD orRefresh Data Hold

• The data HOLD function allows operator to freeze the displayed digital value while
the analog bargraph continues to display the present reading.

• Press this button momentarily to toggle DH on or off. The display shows "DH" to
indicate the hold function.

• If you select " Refresh Data Hold " by Power-ON Options, the reading is updated to
the display automatically when the reading changes. The beeper sounds a tone to
remind user, that an update has occurred.

• Press this button momentarily to toggle DH on or off.

3. MAX a MIN m: Dynamic Recording

•To enter or exit dynamic recording mode, press and hold this button to toggle
recording mode on or off.

• Records maximum, minimum, and calculates true average.

• Press this button momentarily to cycle through maximum, minimum, average
and present (MAX AVG MIN) readings.

• The beeper sounds when a new maximum, or minimum value is recorded.

4. Zero /* m :

• Push this button momentarily to zero the residual current. Note: Allow the meter to
stabilize before zeroing the display. The " A " will also be displayed.

• Press this button for more than I second to toggle Backlight ON or OFF. Backlight
turns off automatically after 30 seconds.

9