Amprobe ACDC-620T User manual

SERVICE
If the instrument fails to operate, check battery, test leads, etc and
replace as necessary. If the instrument still malfunctions, please call
the phone number listed below:
Service Division
AMPROBE INSTRUMENT
Miami, Florida 33150
Tel: [phone]
outside the U.S.A. the local Amprobe representative will assist you.
Visit our Web-site HTTP://www.AMPROBE.COM
|AMPROBE®
DIVISION OF CORE INDUSTRIES INC.
Miami, Florida 33150
Tel: [phone]

USER MANUAL
MODEL: ACDC-620T
|AMPROBE®
Miramar, Florida 33025
Tel: [phone]
AUNIQUE AC / DC TRUE RMS
CLAMP-ON MULTIMETER
UL
®
C
LISTED
Manual P/N: 978760
8/97
z

1
LIMITED WARRANTY
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 its
functions. It has been tested by qualified factory technicians according to the long-
established standards of AMPROBE®.
Your AMPROBE® instrument has a limited warranty against defective materials
and/or workmanship for two years 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 the two-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:
Service Division
AMPROBE INSTRUMENT
Miami, Florida 33150
Tel: [phone]

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CONTENTS
PÁGINA
LIMITED WARRANTY 1
SAFETYINFORMATION 4
AUNIQUE CLAMP-ON MULTIMETER 6
● INTRODUCTION 6
USING THE METER SAFELY 8
LCD DISPLAYILLUSTRATION 10
GETTING ACQUAINTED WITH YOUR METER 12
● ALIGNMENTMARKS 12
● ROTARYSWITCH 13
● INPUTTERMINAL 14
● PUSH BOTTONS 15
PUSH-BOTTONS OPERATIONS 16
POWER ON OPTIONS 18
SPECIALFUNCTIONS INSTRUCTIONS 19
● Dynamic Recording 19
● Data Hold 22
● Zero (Relative)
● Analog Bargraph 23
● Auto Power Off and Sleep Mode 24
● Disable Auto Power Off 25
● Demostrate Annunciator 25
● Continuity Function For Ohms Measurement 26
● 1 ms Peak Hold 27

CONTENTS continued
PAGE
HOW TO OPERATE
●AC CURRENTMEASUREMENT 29
●DISTRIBUTION TRANSFORMER MEASUREMENT 29
●AC MOTOR CURRENTMEASUREMENT 31
●AC VOLTAGE MEASUREMENT 33
●RESSISTENCE / CONTINUITYMEASUREMENT 35
●TEMPERATURE MEASUREMENT 39
●CAPACITANCE MEASUREMENT 43
ESPECIFICACIONES GENERALES 45
GENERALSPECIFICATIONS 47
ACCESSORIES AND REPLACEMENT PARTS 48
CURENT HARMONICS THEORY 51
●TRUE RMS MEASUREMENT 53
●WAVE FORM COMPARISON 54
REFRIGERATION 56
MAINTENANCE 61
●SERVICE
●BATERYREPLACEMENT 61
●CLEANING 64
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SAFETYINFORMATION
cSAFETYINFORMATION:
●To ensure that you use meter safely, 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 the meter only as specified in this manual. Otherwise, the protection pro
vided by the meter may be impaired.
●Never measure current while the test leads arer inserted into the input termi
nals.
●Do not use the metr if it looks dameged.
●Inspect the leads for damage insulation or exposed metal. Check test lead
continuity. Replace damaged leads
●Disconnect the power and discharge all high-voltage capacitors before testing.
●Use caution when working above 60V DC or 30V AC RMS. Such voltages
pose a pose a shock hazard
●When making measurements, keep your fingers behind the finger guards on
the probe.

●Set the proper function and renge before attaching the metr to circuit. To avoid
damaging the meter disconnect the test leads from test points before changing
functions.
●Read this operation manual completly before using the meter and follow all
safety instructions.
●The meter is safety-certified in compliance with UL3111-1, C22.2 NO.1010.1-
92 and EN61010(IEC 1010-1, 1010-2031,IEC 1010-2-32) Instalation Category
ll 1000V or instalation Category lll 600V. In order to mantain its insulation
properties, please be sure to use ULListed Category ll 1000V or Category lll
600V probes.
●insrtallation category (CAT) ll is an environment with smaller trasient overvolt-
age than Installation Category lll.
●CE requirement: Under the influence of R.F field according to standard, the
supplied test leads will pick up induced noice. To have better shielding 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 ~ 500MHz, signal intensity is 3 volts per meter.
3. IEC 801-4: EFT(electro-fast transient) test.
4. EN 55011: EMI (electromagnetic interference) test.
●Do not allow the temperature sensor to contact a surface which is energized
above 30 V RMS or 60V DC, such voltages pose a shock hazard.
5

6
AUNIQUE CLAMP-ON MULTIMETER
cINTRODUCTION
Measuring current accurately is difficult job in today's industrial plants and com-
mercial buildings.An increasing number of personal computers, adjustable
speed motor drivers, and other types of electronic equipment in short pulses and
are reffered to as non-linear loads.
non-linear loads draw high peak current, causing harmonics 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 or clamp meter. this CLAMP-ON MULTI-
METERis shown in Figure1.
This meter has many functions which are shown below:
●TRUE RMSmeasurement for non-linear and traditional loads.
●1ms Peak. Hold feature to capture glitch or in-rush current.
●Differentiation reading for Dual temperature measurement.
●Start capacitor measurement.
●Dynamic Recording helps to record the variation of test.
●Hand Guard for prevention of accidental contact with conductors.
●Carryng case with shoulder strap
●Data Hold to freeze displayed digital value.
●Relative(zero) function
●Auto and Manual Ranging

Figure 1. AUnique Clamp-On Multimeter
7
Start capacitor
measurement
Ohm measurement and
k-type temperature
Voltage measurement
Current measurement
1ms Peak Hold for
glitch capture
Different Temperatures
measurement
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
of and °C of temperature
simultaneously.
Relative (ZERO) mode for
deviation measurements.
AUTO/MANUAL
SELECT

USING THE METER SAFELY
cWARNING
Read " SAFETYINFORMATION" before using the meter..
cNOTE
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
manualfor the test procedures that apply to your particular piece of equipment.
Your Clamp-on multimeter is a hand-held, bateryy operated instrument for test-
ing and troubleshooting electrical and electronic systems. If the meter is dam-
aged 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 and actions that may damage the Meter.InternTIONl electri-
cal symbols used are explained inTable 1.
Tabla 1. Símbolos Eléctricos Internacionales
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AC- Alternating Current
DC- Direct Current
AC and DC-Alternating and Direct Current
Ground
Double Insulation
See Explanation In The Manual
w
y
y
v
G
G
x

LCD DISPLAYILLUSTRATION
1) - Negative polarity Annunciator
2) @OFF Auto Power Off Enabled Annunciator
3) q Low Battery Annunciator
4) DC Direct Current or Volytage Annunciator
5) AC Alterning Current or Volytage Annunciator
6) AUTO AUTOrange Mode Annunciator
7) DH Data hold Annunciator
8) DH MAX Peak hold Annunciator
9) MAX AVG MIN Dynamic recording mode, presasent reading
10) MAX Maximum reading
11) MIN Minimum reading
12) AVG Average reading
13) n)))Continuity function annunciator
14) T1-T2 Delta Temperature (withDKTA-620 adapter)
15) T1 T2 T1 or T2 temperature measurement
16) °C, °F Unit of temperature
17) V Unit of Voltage measurement
18) A Unit of Curent measurement
19) kW Unit of Resistance (ohm) measurement
20) _ Zero (Delta) mode annunciator
21) 8.8.8.8 Digital display for degree °F, A, V and Ω
22) 8000 8000 Analog bar-graph annunciator with sacle indicator.
-IIIIIIIIIl4
23) µFUnit of Capacitor measurement
24) - 8.8.8.8 Digital display for degree C
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Figure 2. LCD Display

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Figur3 3. Alignment Marks
In order to meet the meeter accuracy spacifications when making a current meas-
urement, the conductor must be inside the jaws and centered within the indicated
marks as much as possible (see Figure 3).
Getting Acquainted WIth Your Meter
cALIGNMENT MARKS
Conductor
Mark
MARK
MARK

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 push
button while turning the meter from OFF to ON, the display remains [it
until the push button is released.)
1. OFF: Power off position.
2. ≅A: AC or DC Current. Default is AC current.
El valor predetermina.
do es corriente alterna (CA).
3. ≅V: AC or DC voltage. Default is AC voltage.
4. TempΩ: Temperature/Differential Temperature, Ohms,
and Continuity. The continuity buzzer sounds when
test value that is displayed is below 100 counts.
5. µF: Capacitance measurement.
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5 µF
4 Temp.Ω
3 V
2 A
1OFF
Figure 4. Rotary Switch
y
y

INPUT TERMINAL
WARNING
To avoid damaging the meter, do not exceed input limit shown below
Table 1:
Table 1. Input limit specificationTable 1.
The meter has two input terminals (Figure 5) that are protected
against overloads to the limits shown in the specifications.
1. Terminal común para todas las mediciones excepto la de corriente.
2. Voltios, Ohmios, Prueba de Capacidad y mediciones de
Temperatura.
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ROTATORYSWITVH FUNCTION
AC 400 ~ 1000V(CATII)
AC 400 ~ 600V(CATIII)
DC 400 ~ 1000V(CATII)
DC 400 ~ 600V(CATIII)
DC 400 ~ 1000 A
AC 400 ~ 1000 A
OHM (Ω)
Capacitance (µF)
Temperature
INPUTTRMINAL
V - Ω- µF & COM
Clamp jaw
V - Ω- µF & COM
INPUTLIMIT
CATII
1000V de CA/1000V DC
CATIIl
600V
1000ARMS
600V RMS
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Figure 5. Input Terminal

Figure 6. Push bottons
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1. Press to lselect
DC.AC,DC+AC
Press and hold for
more than 1 second
to toggle, between
PEAK" and DC.
Press to toggle 0
and Temperature
measurements.
5. Press to toggle Continuity
ON/OFF for Ohm measurement.
Press to select T1-T2-T2 for tem
perature measurement.
3. Press and hold for more
than 1 second to set
Dynamic Recording then
press to step through
MAX,MIN, AVG and present
readings..
6. In manual range press to step
up 1 range at a time. Press
and hold for 1 sec to select
Auto range.
4. Press to toggle the relative
(ZERO) mode ON/OFF.
2. Press to toggle
"DH" ON/OFF.

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Push-button Operations
The operation of the push-buttons are outlined below. When a buton is pushed,
an annunciator lights, and the unit beeps. turning the rotary switch to another
switch setting resets all push buttons to thei default states. The pushbuttons are
shown in (page15).
1. Shift / Peak ❍:
● This push-button is used for selecting the measurement of either
an Alternating or Direct source, Ohms or Temperature, or for selecting the
PEAK hold function.
● Press this button momentarily to toggle DC and AC test.
or between Ωand Temperature.
● To select PEAK hold, press and hold this button until the display shows " DH
MAX" and indicates the PEAK hold mode.
2. Hold ❍: Hold Q: DATAHOLD or Refresh Data Hold
0The 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.
. MAX * MIN 0: Dynamic Recording
3. MAX ●MIN ❍: Dynamic recording
● To enter or exit dynamic recording mode, press and hold this button to toggle
recording mmode,press and ghold this buton to toggle recording mode on or off.
● Records maximum, minimum, and calculates tru avarage.
● Press this button momentarily to cycle through maximum, minimum, average
and present (MAX AVGMIN) readings.

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4. Zero ❍:
● Push this button momentarily to zero the residual current. Note: Allow the
meter to stabilize before zeroing the display.
The " ∆" swill also be displayed.
5. ●))) / ∆T m: continuity, Delta Temperature
● In the Ω position, press this button momenterily to toggle "●)))"
continuity ON/OFF. The continuity buzzer sound when test value is below 100
counts (10,0 Ωon auto range). pushing this button for more than 1 secondwill
exit the continuity function and return to the auto-ranging ohm measurement.
● Press to restart 1ms PEAKhold test afte entering PEAK mode.
● in the temperature test, push this button momentarily to toggle between T1 T2
temperature and T1 - T2 diferential temperatures test. Note: T1, T2 or T1 - T2
selected on the DKTA-620acessory adapter (optional)..
6. AUTO / RANGE ❍:
● In auto-range press this button momentarily to select manual range and turn
off the "AUTO" annunciator.
● In manual range, press this button momentarily to step up 1 range at one time,
press. this buttonfor more than 1 second to enter auto-range.
● in auto-range, the "AUTO" annunciator is lit an the meter will select an
appropiate renge for measurement being made. If a reading is greater than max-
imum available renge, "OL" (overload) is displayed on the screen. The meter
selects a lower range when reading is less thn about 9% of fill scale.

POWER-ON OPTIONS
cSELECTING POWER-ON OPTIONS
Some options can only be selected when you turn the meter on. These power-on
options are listed in Table 2.
To select power-on press and hold the appriopriate pushbutton while turning the
rotary switch to any ON position. Power-on optons remain selected until the
meter is turned off.
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PUSH
BUTTON OPTIONDESCRIPTION
Turns off all beeper functions.
●)))
❍
∆T
DH
❍
MAX●MIN
Demonstrate Annunciators
To demonstrate the annunciators. to demonstrate all annunciators.
momentarily press any button to exit the demonstration mod.
Disable auto-power off
In general, the auto-power off function turns the meter off if neither
rotary switch nor push button is activated for 15 minutes. You can dis-
able auto-power off function by this option. When auto-power off is dis-
abled the meter will stay in on continuously. Auto-power off is auto dis-
able in Dynamic Recording.
Enable "Refresh data Hold".
Table 2. Power-ON Options

SPECIALFUNCTIONS INSTRUCTIONS
This clamp-on multimeter provides the operator with various functions including:
cDynamic Recording
cData Hold
cZero (Relative)
cAnalog bargraph
cAuto Power Off and Sleep Mode
cDisable Auto Power Off
cDemonstrate Annunciator of Display
cContinuity Function For Ohms Measurement
c1ms Peak hold
cDYNAMIC RECORDING
The dynamic recording mode can be used to catch intermittent and turn on or off
surges, verify performance while you are away, or take readings while you are
operating the equipment under test and can not watch the meter.
the average reading is useful for smoothing out unstable or changing inputs, esti-
mating the the percent of time a circuit is operational, or verifying circuit perform-
ance
The operational procedures are described below::
1. Press and hold the "MAX●MIN" push button to toggle recording mode on or
off. the dynamic recording ode is indicated when the MAX AVG MINannunci
ator turns on. The present valve is stored to memories of maximum, minimum
and average.
2. Press this button momentarily to cycle through maximum, average and present
readings. The MAX, MIN, AVG annunciator turns on respectively to indicate
what value is being displayed. See Figure 7.
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