Amprobe ACDC-620T Clamp-On-Multimeter Uživatelský manuál

SERVICEIf the instrument fails to operate, check battery, test leads, etc andreplace as necessary. If the instrument still malfunctions, please callth

USING THE METER SAFELYcWARNINGRead " SAFETYINFORMATION" before using the meter..cNOTE Some typical tests are provided in this manual. These

LCD DISPLAYILLUSTRATION 1) - Negative polarity Annunciator2) @OFF Auto Power Off Enabled Annunciator3)q Low Battery Annunciator4) DC Direct Current or

11Figure 2. LCD Display

12Figur3 3. Alignment MarksIn order to meet the meeter accuracy spacifications when making a current meas-urement, the conductor must be inside the ja

Rotary SwitchTo 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

INPUT TERMINALWARNINGTo avoid damaging the meter, do not exceed input limit shown belowTable 1:Table 1. Input limit specificationTable 1. The meter ha

Figure 6. Push bottons151. Press to lselectDC.AC,DC+ACPress and hold formore than 1 second to toggle, betweenPEAK" and DC.Press to toggle

16Push-button OperationsThe operation of the push-buttons are outlined below. When a buton is pushed,an annunciator lights, and the unit beeps. turnin

174. Zero ❍:● Push this button momentarily to zero the residual current. Note: Allow themeter to stabilize before zeroing the display. The &q

POWER-ON OPTIONScSELECTING POWER-ON OPTIONSSome options can only be selected when you turn the meter on. These power-onoptions are listed in Table 2.T

USER MANUALMODEL: ACDC-620T|AMPROBE®Miramar, Florida 33025Tel: 800-327-5060AUNIQUE AC / DC TRUE RMSCLAMP-ON MULTIMETERUL®CLISTEDManual P/N: 9787608/9

SPECIALFUNCTIONS INSTRUCTIONSThis clamp-on multimeter provides the operator with various functions including:cDynamic RecordingcData HoldcZero (Relati

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

Figure 7. Display of Dynamic Recording211. Press for more than 1 second to enter Dynamic Recording

cDATAHOLDThe data HOLD function allos operator to freeze the displayed digital value whilethe aanlog bargraph displays present readings. Press "

cANALOGBATRGRAPHThe analog bargraph display provides a 12-segment analog reading representa tion. The unit of the bargraph is 100 counts/bar.Figure 9.

Figura 10. Analog Bar graphcAUTO POWER OFFAND SLEEPMODEThere are two modes for power saving.1 ) The instrument will enter the "sleep" mode w

25cDISABLE AUTO POWEROFFWhen the meter is to be used for long periods of time you may want to disable theauto power off. Once the auto power off funct

cCONTINUITY FUNCTION FOR OHMS MEASUREMENTTo enable the continuity function, set the meter to the Ω range. Press ●))) button momentarily to toggle the

c1ms Peak HoldYou can use this Meter to analyze components such as power distribution trans-formers and power factor correction capacitors. The additi

3) If the reading is " OL", then you can push RANGE button momentarily to change measuring range and restart the PEAK+ measurement after set

1LIMITED WARRANTYCongratulations! You are now the owner of an AMPROBE®instrument. It has beenquality crafted according to quality standards and contai

HOW TO OPERATEcAC CURRENT MEASUREMENTWARNING: MAKE CERTAIN THATALLTESTLEADS ARE DISCONNECTED FROM THE METER TERMINALS.1 ) Set the rotary switch to &

Figure 17. Measuring AC Current.CORRECTINCORRECT30

cDISTRIBUTION TRANSFORMER MEASUREMENTYou can measure current, phase imbalance between phases, and true RMS neutralcurrent. True RMS measurement yields

Figure 18. Measuring AC Curreft32

cAC MOTOR CURRENT MEASUREMENTYou can measure starting (inrush) current , running current, and current imbal-ance in AC Motor circuits. Inrush current

Figure 19. Measuring AC Motor Curent 34

cAC VOLTAGE MEASUREMENT1. Set the rotary switch to "V".2. Insert the black test lead to "COM" terminal and red test lead to "

Figure 20. Measuring Voltage.36

cRESISTANCE / CONTINUITYMEASUREMENTCAUTION: Make sure that power is removed and allcapacitors have been discharged before measuring.1) Set the rotary

Figura 21. Measuring Resistance and Continuity.FUSECARTRIDGE38

2CONTENTSPÁGINALIMITED WARRANTY 1SAFETYINFORMATION 4AUNIQUE CLAMP-ON MULTIMETER 6● INTRODUCTION 6USING THE METER SAFELY 8LCD DISPLAYILLUSTRATION 1

cTEMPERATURE (K-TYPE) MEASUREMENTSThe ACDC-620TLCD contains a dual display forTemperature Measurement. The larger digits display oF (Fahrenheit), and

Figure 22. Surface Temperature Measurement.40PressShift

●To perform dual input and/or differential temperature measurement:1) Set the rotary switch to "TEMP. Ω ".2) Insert the model DKTA-620 Dual

Figure 23. Measuring Temperature on Refrigeration System.Contact whereyou want to measuringPRESS ∆T42

cCAPACITANCE MEASUREMENTSIn many instances a motor can not be started due to a failed start/run capacitor. Totest the capacitor:: Discharge the capaci

Figure 24. CAPACITANCEMEASUREMENTS.44Negro (-)Rojo(+)

GENERALSPECIFICATIONSDisplay:Display: Fully annunciated 4-digit liquid crystal display (LCD) with maximum readingof 4,000 count. Dual display in Tempe

MAX. Jaw Opening:To Accommodate Circuit Cables 2" ( 50.8 mm ) diameter.Dimension:32 (H) x 64 (W) x 260 (L) mm1.26"(H) x 2.52"(W) x 10.2

47Accessories and ReplacementsPartsSafety Test Leads(included)Carryimg Case(included)Instruction Manual(included)9 Volt Alkaline Battery(included)Dual

ELECTRICALSPECIFICATIONSAccuracy is giveN as ± % of reading + the number of least significant digits at 23oC ± 5oC, with relative hunidity Less than

CONTENTS continuedPAGEHOW TO OPERATE●AC CURRENTMEASUREMENT 29●DISTRIBUTION TRANSFORMER MEASUREMENT 29●AC MOTOR CURRENTMEASUREMENT 31●AC VOLTAGE MEASUR

49Range Resolution Accuracy400A 0.1A1000A 1A±(1,5%rdg+3rdg)±(2% rdg+ 5rdg)cDC CURRENTRange Resolution Accuracy400A 0.1A1000A 1A45Hz~65Hz 65Hz~2kHz±(2%

RANG Resolution Accuracy *V Maximum -40°C ~1372°C 1°C-40°F ~ 2502°F 1°F±(0,5%rdg+3°C)±(0,5%rdg+6°F)30 V RMSor 60 V

CURRENT HARMONICS THEORYTrue-RMS current is very important because it directly relates to the amount ofheat dissipated in wiring, transformers, and lo

non-linear current. This generates odd harmonics of the 5OHz or 60Hz linefrequency. Therefore, the current waveform from the transformer could contain

53cTRUERMSMEASUREMENTThe meter measures the TRUERMS value of AC voltages and currents. In physicalterms, the RMS (Root-Mean-Square) value of a wavefor

cWAVEFORMCOMPARISONTa b l e3. Illustrates the relationship between AC and DC components for commonwaveforms, and compares readings for TRUE RMS mete

Table 3. WAVEFORMCOMPARISONCHART55* RMS CALIS THE DISPLAYED VALUEFOR AVERAGE RESPONDING METERSTHATARE CALIBRATED RMS FOR SINE WAVES.

56REFRIGERATIN THEORYThermocouples are widely used in the process control and refrigeration industry. Areview of basic refrigeration theory will help

57cThe Refrigation CycleInside a refrigerator, a compressed gas in liquid form is released through an expan-sion valve into the low pressure of an eva

Once outside, the gas enters the compressor on the low-pressure side and iscompressed. As it is compressed, the gas temperature rises above the surrou

4SAFETYINFORMATIONcSAFETYINFORMATION:●To ensure that you use meter safely, follow the safety guidelines listed below.●This meter is for indoor use, al

59Condenser TemperatureThe condenser's entire mid-section should be at the refrigerant's condensing tem-perature. The condensing temperature

Condenser Sub-coolLike the evaporator, the condenser is sized so that all the gas will be condensedbefore the last few coils, the liquid temperature d

61MAINTENANCEWARNINGTo avoid electrical shock, do not perform any servicing unless you are qualified todo so.cSERVICEIf the instrument fails to operat

62Figure 26. step 1 of Battery replacement.Pull up slightly

63Figure 27. Step 2 of Battery Replacement.Pull and move to right.

64c CLEANINGTo clean the instrument, use s soft cloth dampened in a solution of mild detergentand water. Do not spery cleaner directly onto the instru

●Set the proper function and renge before attaching the metr to circuit. To avoid damaging the meter disconnect the test leads from test points befor

6AUNIQUE CLAMP-ON MULTIMETERcINTRODUCTIONMeasuring current accurately is difficult job in today's industrial plants and com-mercial buildings.An

Figure 1. AUnique Clamp-On Multimeter7Start capacitormeasurementOhm measurement andk-type temperatureVoltage measurementCurrent measurement1ms Peak Ho