Amprobe ACDC-620T User Manual
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Amprobe ACDC-620T User Manual

Aunique ac / dc true rms clamp-on multimeter
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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:
AMPROBE INSTRUMENT
Miami, Florida 33150
outside the U.S.A. the local Amprobe representative will assist you.
|
AMPROBE
DIVISION OF CORE INDUSTRIES INC.
Miami, Florida 33150
Tel: 800-327-5060
Visit our Web-site HTTP://www.AMPROBE.COM
SERVICE
Service Division
Tel: 800-327-5060
®

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  • Page 1 If the instrument still malfunctions, please call the phone number listed below: Service Division AMPROBE INSTRUMENT Miami, Florida 33150 Tel: 800-327-5060 outside the U.S.A. the local Amprobe representative will assist you. ® AMPROBE DIVISION OF CORE INDUSTRIES INC. Miami, Florida 33150 Tel: 800-327-5060...
  • Page 2 Manual P/N: 978760 8/97 USER MANUAL AUNIQUE AC / DC TRUE RMS CLAMP-ON MULTIMETER MODEL: ACDC-620T ® LISTED ® AMPROBE Miramar, Florida 33025 Tel: 800-327-5060...

  • Page 3: Limited Warranty

    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 ®...

  • Page 4: Table Of Contents

    CONTENTS PÁGINA LIMITED WARRANTY SAFETYINFORMATION AUNIQUE CLAMP-ON MULTIMETER INTRODUCTION USING THE METER SAFELY LCD DISPLAYILLUSTRATION GETTING ACQUAINTED WITH YOUR METER ALIGNMENTMARKS ROTARYSWITCH INPUTTERMINAL PUSH BOTTONS PUSH-BOTTONS OPERATIONS POWER ON OPTIONS SPECIALFUNCTIONS INSTRUCTIONS Dynamic Recording Data Hold Zero (Relative) Analog Bargraph Auto Power Off and Sleep Mode Disable Auto Power Off Demostrate Annunciator...
  • Page 5 CONTENTS continued PAGE HOW TO OPERATE AC CURRENTMEASUREMENT DISTRIBUTION TRANSFORMER MEASUREMENT AC MOTOR CURRENTMEASUREMENT AC VOLTAGE MEASUREMENT RESSISTENCE / CONTINUITYMEASUREMENT TEMPERATURE MEASUREMENT CAPACITANCE MEASUREMENT ESPECIFICACIONES GENERALES GENERALSPECIFICATIONS ACCESSORIES AND REPLACEMENT PARTS CURENT HARMONICS THEORY TRUE RMS MEASUREMENT WAVE FORM COMPARISON REFRIGERATION MAINTENANCE SERVICE...

  • Page 6: Safetyinformation

    SAFETYINFORMATION SAFETYINFORMATION: 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.
  • Page 7 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.

  • Page 8: Aunique Clamp-On Multimeter

    AUNIQUE CLAMP-ON MULTIMETER INTRODUCTION 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.
  • Page 9 Hand guard design for more safety. Start capacitor measurement Dynamic Recording helps to record the Ohm measurement and variation of tests. And k-type temperature one touch DATA HOLD. Voltage measurement Rotary switch for easy operation. Current measurement Dual display to indicate the of and °C of temperature simultaneously.

  • Page 10: Using The Meter Safely

    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 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.

  • Page 11: Lcd Displayillustration

    LCD DISPLAYILLUSTRATION Negative polarity Annunciator @OFF Auto Power Off Enabled Annunciator Low Battery Annunciator Direct Current or Volytage Annunciator Alterning Current or Volytage Annunciator AUTO AUTOrange Mode Annunciator Data hold Annunciator DH MAX Peak hold Annunciator MAX AVG MIN Dynamic recording mode, presasent reading Maximum reading Minimum reading Average reading...
  • Page 12 Figure 2. LCD Display...

  • Page 13: Getting Acquainted With Your Meter

    Getting Acquainted WIth Your Meter ALIGNMENT MARKS MARK Conductor MARK Mark 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).

  • Page 14: Rotaryswitch

    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.

  • Page 15: Inputterminal

    INPUT TERMINAL WARNING To avoid damaging the meter, do not exceed input limit shown below Table 1: ROTATORYSWITVH FUNCTION INPUTTRMINAL INPUTLIMIT µ Ω F & COM AC 400 ~ 1000V(CATII) CATII AC 400 ~ 600V(CATIII) 1000V de CA/1000V DC DC 400 ~ 1000V(CATII) CATIIl DC 400 ~ 600V(CATIII) 600V...

  • Page 16: Push Bottons

    2. Press to toggle "DH" ON/OFF. 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 1. Press to lselect up 1 range at a time.

  • Page 17: Push-Bottons Operations

    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).
  • Page 18 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. ∆ T m: continuity, Delta Temperature Ω In the position, press this button momenterily to toggle " )"...

  • Page 19: Power On Options

    POWER-ON OPTIONS SELECTING 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.

  • Page 20: Specialfunctions Instructions

    SPECIALFUNCTIONS INSTRUCTIONS This clamp-on multimeter provides the operator with various functions including: Dynamic Recording Data Hold Zero (Relative) Analog bargraph Auto Power Off and Sleep Mode Disable Auto Power Off Demonstrate Annunciator of Display Continuity Function For Ohms Measurement 1ms Peak hold DYNAMIC 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...
  • Page 21 3. The beeper sounds when a new maximun or minimum value is recorded. 4. If an overload is recorded the averaging function is stopped. An average value becomes "OL" (overloaded. 5. In dynamic recording the auto powe off feature is disabled and the"@OFF" turns off.
  • Page 22 1. Press for more than 1 second to enter Dynamic Recording Figure 7. Display of Dynamic Recording...

  • Page 23: Datahold

    DATAHOLD The data HOLD function allos operator to freeze the displayed digital value while the aanlog bargraph displays present readings. Press "DH" Hold button to enter the data Hold mode, and the "DH" annunciator is displayed. Press the button again to exit.

  • Page 24: Analog Bargraph

    Figure 9. relative(Zero) Operation. ANALOGBATRGRAPH The analog bargraph display provides a 12-segment analog reading representa tion. The unit of the bargraph is 100 counts/bar.

  • Page 25: Auto Power Offand Sleepmode

    Figura 10. Analog Bar graph AUTO POWER OFFAND SLEEPMODE There are two modes for power saving. 1 ) The instrument will enter the "sleep" mode within 15 minutes, unless: 1-1. Any push buttons have been pressed 1-2. The rotary switch has been changed to another function 1-3.

  • Page 26: Disable Auto Poweroff

    @OFF Figure 11. Sleep Mode DISABLE AUTO POWEROFF When the meter is to be used for long periods of time you may want to disable the auto power off. Once the auto power off function is disabled, the meter will stay on continuously.

  • Page 27: Demostrate Annunciator

    Figure 12. Demostrate Annunciator. c CONTINUITY FUNCTION FOR OHMS MEASUREMENT To enable the continuity function, set the meter to the Ω range. Press button momentarily to toggle the CONTINUITYfunction ON/OFF. The continuity range is 0-400.0 Ω and the beeper will sound if the resistance is less than 10.0 Ω.

  • Page 28: Ms Peak Hold

    Ω Ω IIII IIII Figure 14. Continuity Operation 1ms Peak Hold You can use this Meter to analyze components such as power distribution trans- formers and power factor correction capacitors. The additional features allow the measurement of the half-cycle peak current by using the I ms peak hold feature. This allows the determination of the crest factor: Crest factor = Peak value/True rms value 1 ) Press PEAK button for more than 1 second to toggle 1 ms peak hold mode...
  • Page 29 3) If the reading is " OL", then you can push RANGE button momentarily to change measuring range and restart the PEAK+ measurement after setting the peak mode. 4) Press button to re-set the I ms peak hold again after setting peak mode. Note: Acrest factor of 1.4 indicates a sinusoidal waveform.

  • Page 30: How To Operate

    HOW TO OPERATE AC CURRENT MEASUREMENT WARNING: MAKE CERTAIN THATALLTESTLEADS ARE DISCONNECTED FROM THE METER TERMINALS. 1 ) Set the rotary switch to " A ". 2) Open the meter jaws and clamp around a single conductor. The most accurate reading will be obtained by keeping the conductor aligned with the centering marks on the jaws.
  • Page 31 CORRECT INCORRECT Figure 17. Measuring AC Current.

  • Page 32: Distribution Transformer Measurement

    DISTRIBUTION TRANSFORMER MEASUREMENT You can measure current, phase imbalance between phases, and true RMS neutral current. True RMS measurement yields the effective value. 1) Set the rotary switch to " A ". 2) Clamp around a phase wire of the transformer. Be sure the jaws are completely closed or measurement will not be accurate.
  • Page 33 Figure 18. Measuring AC Curreft...

  • Page 34: Ac Motor Currentmeasurement

    AC MOTOR CURRENT MEASUREMENT You can measure starting (inrush) current , running current, and current imbal- ance in AC Motor circuits. Inrush current is typically 6-8 times the value of run- ning current, depending on the motor type.. 1. St the rotary switch to "A". 2.
  • Page 35 Figure 19. Measuring Motor Curent...

  • Page 36: Ac Voltage Measurement

    AC VOLTAGE MEASUREMENT 1. Set the rotary switch to "V". 2. Insert the black test lead to "COM" terminal and red test lead to Ω µF "V - " terminal. 3. touch the probes to the test points and read the displayed AC Voltage.
  • Page 37 Figure 20. Measuring Voltage.

  • Page 38: Ressistence / Continuitymeasurement

    RESISTANCE / CONTINUITYMEASUREMENT CAUTION: Make sure that power is removed and all capacitors have been discharged before measuring. Ω 1) Set the rotary switch to "TEMP. ". OLis displayed. 2) Insert the black test lead to "COM" terminal and red test lead to Ω...
  • Page 39 FUSE CARTRIDGE Figura 21. Measuring Resistance and Continuity.

  • Page 40: Temperature Measurement

    TEMPERATURE (K-TYPE) MEASUREMENTS The ACDC-620TLCD contains a dual display for Temperature Measurement. The larger digits display F (Fahrenheit), and the small digits display C (Celsius). Both readings are displayed simultaneously. CAUTION: Do not allow the temperature sensor to contact a surface which is ener- gized above 30 V RMS or 60 V DC, such voltages pose a shock hazard.
  • Page 41 Press Shift Figure 22. Surface Temperature Measurement.
  • Page 42 To perform dual input and/or differential temperature measurement: 1) Set the rotary switch to "TEMP. Ω ". 2) Insert the model DKTA-620 Dual Type K thermocouple adapter into the meter. The "+" end of the adapter must be inserted into "V - Ω - µF" terminal. 3) 1 nsert two of the model TPK-56 Type K thermocouples into the DIKTA-620.
  • Page 43 Contact where you want to measuring PRESS ∆ Figure 23. Measuring Temperature on Refrigeration System.

  • Page 44: Capacitance Measurement

    CAPACITANCE MEASUREMENTS In many instances a motor can not be started due to a failed start/run capacitor. To test the capacitor: : Discharge the capacitor before testing. 1 ) Set the rotary switch to "µF" position. 2) Insert the black test lead to "COM" terminal and red test lead to "V - Ω - µF" terminal.
  • Page 45 Rojo Negro Figure 24. CAPACITANCEMEASUREMENTS.

  • Page 46: Generalspecifications

    GENERALSPECIFICATIONS Display: Display: Fully annunciated 4-digit liquid crystal display (LCD) with maximum reading of 4,000 count. Dual display in Temperature mode. 12 segments analog bar graph. Automatic polarity indication. Functions: DCV, ACV, DCA, ACA, OHM, Capacitance and Temperature. Measuring rate: 3.3 times per second for V, A, Ohm and Temperature tests.
  • Page 47 MAX. Jaw Opening: To Accommodate Circuit Cables 2" ( 50.8 mm ) diameter. Dimension: 32 (H) x 64 (W) x 260 (L) mm 1.26"(H) x 2.52"(W) x 10.24"(L) Weight: 840 grams with battery included. (1.85 lbs with battery included.) Standard Accessories: Test leads (pair), Manual, Battery and Carrying case. Optional Accessories: K-type bead probe and Dual input adopter.

  • Page 48: Accessories And Replacement Parts

    Accessories and ReplacementsParts Amprobe P/N Description Safety Test Leads(included) DTL-3000 Carryimg Case(included) CC-ACDC 978760 Instruction Manual(included) MN-1604 9 Volt Alkaline Battery(included) DKTA-620 Dual input thermocouple adapter(opcional) TAC-DMM Single input thermocouple(opcional) TPK-56 Type K bead probe(opcional)
  • Page 49 ELECTRICALSPECIFICATIONS Accuracy is giveN as ± % of reading + the number of least significant digits at C ± 5 C, with relative hunidity Less than 80% R.H. DC VOLTAJE Range Resolution Accuracy Overload Protection 400V 0.1V ±(1% rdg + 3 dgt) 1000V AC RMS 1000v...
  • Page 50 DC CURRENT Range Resolution Accuracy 400A 0.1A ±(1,5%rdg+3rdg) ±(2% rdg+ 5rdg) 1000A AC CURRENT (TRUE RMS: From 10% al 100% of range) Range Resolution Accuracy 45Hz~65Hz 65Hz~2kHz ±(2% rdg+5dgt) ±(3%rdg+5 dgt) 400A 0.1A ±(3%rdg+5 dgt) 1000A ±(2.5% rdg + 5dgt) ±(3% de la Crest Factor: <3:1 CORRIENTE (RETENCIÓN DE PICO DE 1ms)
  • Page 51 K-TYPETEMPERATUREMEASUREMENTRANGE RANG Resolution Accuracy *V Maximum -40°C ~1372°C 1°C ±(0,5%rdg+3°C) 30 V RMS -40°F ~ 2502°F 1°F ±(0,5%rdg+6°F) or 60 V DC TEMPERATURADIFERENCIALTIPO K Gama Resolución Precisión *V Máximo ∆ -50°C< T<100°C 1°C ±(0,5%rdg+3°F) 30 V RMS or 60 V DC ∆...

  • Page 52: Curent Harmonics Theory

    CURRENT HARMONICS THEORY True-RMS current is very important because it directly relates to the amount of heat dissipated in wiring, transformers, and loads. Most clamp-on meters already in the field measure average current, not true RMS current, even if this average value is displayed on a scale calibrated in RMS. These average- sensing meters are accurate only for sinusoidal signals.
  • Page 53 non-linear current. This generates odd harmonics of the 5OHz or 60Hz line frequency. Therefore, the current waveform from the transformer could contain not only a 60Hz component, but also a 180Hz component, a 30OHz compo- nent, etc. The vector addition in a properly balanced power distribution system feeding non-linear loads may still be quite low.

  • Page 54: Truermsmeasurement

    RMS value for a harmonic-free sine wave. If a signal is not sinusoidal, average-responding meters do not display correct RMS readings. For a free video on Amprobe's Harmonalyzer, HA-2000 harmonic/waveform analyzer, please contact Amprobe directly.

  • Page 55: Waveformcomparison

    WAVEFORMCOMPARISON Ta b l e3. Illustrates the relationship between AC and DC components for common waveforms, and compares readings for TRUE RMS meters and average-responding meters. For example, consider the first waveform, a 1414V (zero-to-peak) sine wave. Both this Clamp-on meter and RMS-calibrated average-responding meters display the correct RMS reading of100.0V (the DC component equals 0).
  • Page 56 Table 3. WAVEFORMCOMPARISONCHART * RMS CALIS THE DISPLAYED VALUEFOR AVERAGE RESPONDING METERS THATARE CALIBRATED RMS FOR SINE WAVES.

  • Page 57: Refrigeration

    REFRIGERATIN THEORY Thermocouples are widely used in the process control and refrigeration industry. A review of basic refrigeration theory will help you to apply the meter in refrigeration applications. In any refrigeration application the goal is to transfer heat from one place to another. The transfer is made by pumping a refrigerant from one area to another area whose temperature is different.
  • Page 58 THERMOSTATICEXPANSION VALVE EVAPORATOR CONDENSER COMPRESSORS FigurE 25. Refrigeration System. The Refrigation Cycle Inside a refrigerator, a compressed gas in liquid form is released through an expan- sion valve into the low pressure of an evaporator. Here the liquefied gas evaporates (boils).
  • Page 59 Once outside, the gas enters the compressor on the low-pressure side and is compressed. As it is compressed, the gas temperature rises above the surrounding air temperature. The hot gas dissipates its heat in the condenser, becoming liquid once again, before returning to the expansion value. In large systems the temperature and pressure are closely monitored to ensure long life and minimum energy usage.
  • Page 60 Condenser Temperature The condenser's entire mid-section should be at the refrigerant's condensing tem- perature. The condensing temperature is related directly to the condenser's pres- sure, which is produced by the compressor's head-pressure. The condenser temperature varies with the system's load, but it is designed to operate within certain limits.
  • Page 61 Condenser Sub-cool Like the evaporator, the condenser is sized so that all the gas will be condensed before the last few coils, the liquid temperature drops slightly below the condensing temperature. In the case of an overloaded condenser or one short of refrigerant, there will be little or no subcooling.

  • Page 62: Maintenance

    MAINTENANCE WARNING To avoid electrical shock, do not perform any servicing unless you are qualified to do so. SERVICE If the instrument fails to operate, check battery, test leads, etc. and replace as nec- essary. If the instrument still does not operate, double check operating procedure as described in this instruction manual.
  • Page 63 Pull up slightly Figure 26. step 1 of Battery replacement.
  • Page 64 Pull and move to right. Figure 27. Step 2 of Battery Replacement.

  • Page 65: Cleaning

    CLEANING To clean the instrument, use s soft cloth dampened in a solution of mild detergent and water. Do not spery cleaner directly onto the instrument, since it may leak intothe cabinet and cause damage. Do not use chemicals containing benzine, benzene, touene, xylene, acetone or sim- ilar solvents.

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