Keysight U3402A 5 1/2 Digit
Dual Display Multimeter
User’s and
Service Guide
Page 1: ...Keysight U3402A 5 1 2 Digit Dual Display Multimeter User s and Service Guide ...
Page 2: ... rights customarily provided to the public to use modify reproduce release perform display or disclose commercial computer software or commercial computer software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software pursu...
Page 3: ... shock Alternating current AC Caution risk of danger refer to this manual for specific Warning or Caution information Both direct and alternating current Out position of a bi stable push control Earth ground terminal In position of a bi stable push control Protective earth ground terminal Frame or chassis ground terminal IEC Measurement Category II Inputs may be connected to mains up to 300 VAC un...
Page 4: ... check the instrument s operation by measuring a known voltage For current measurement turn off circuit power before connecting the instrument to the circuit Always place the instrument in series with the circuit When connecting probes always connect the common test probe first When disconnecting probes always disconnect the live test probe first Do not measure more than the rated voltage as marke...
Page 5: ... Remove power and do not use the instrument until safe operation can be verified by service trained personnel If necessary return the instrument to Keysight Technologies Sales and Service Office for service and repair to ensure the safety features are maintained CAUTION Turn off circuit power and discharge all high voltage capacitors in the circuit before you perform resistance continuity or diode...
Page 6: ...ng humidity Full accuracy up to 80 R H relative humidity for temperature up to 28 C Storage temperature 20 C to 60 C Non operating Altitude Operating up to 2 000 metres 6 562 feet Pollution degree Pollution Degree 2 NOTE The Keysight U3402A 5 1 2 digit dual display multimeter complies with the following EMC requirements IEC 61010 1 2001 EN61010 1 2001 2nd Edition Canada CAN CSA C22 2 No 61010 1 04...
Page 7: ...992 ICES NMB 001 indicates that this ISM device complies with the Canadian ICES 001 Cet appareil ISM est conforme a la norme NMB 001 du Canada This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste The CSA mark is a registered trademark of the Ca...
Page 8: ... Monitoring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit http about keysight com en companyinfo environment takeback shtml for more information Sales and Technical Support To contact Keysight for sales and technical support refer to the s...
Page 9: ...ual Display Multimeter 18 Checking the shipping contents 19 Connecting power to the multimeter 20 Stacking the U3402A 21 Adjusting the Handle 22 Product at a Glance 23 Product dimensions 23 The front panel at a glance 24 The display at a glance 25 The keypad at a glance 28 The terminals at a glance 31 The rear panel at a glance 33 Making Measurements 34 Performing voltage measurements 34 Performin...
Page 10: ... Examples 67 Measure DC Voltage and AC Ripple on a Rectification Circuit 67 Measure AC and DC Current on a Rectification Circuit 68 Measure AC Voltage and Frequency on an AC Circuit 69 Measure DC Voltage and DC Current on a Transistor Circuit or Load 70 Measure Resistance Using 2 Wire Mode 72 Measure Resistance Using 4 Wire Mode 73 Measure True RMS AC DC 74 4 Performance Test Calibration Overview ...
Page 11: ...pes of Service Available 91 Repackaging for Shipment 92 Cleaning 92 To Replace the Power Line Fuse 93 To Replace a Current Input Fuse 94 Electrostatic Discharge ESD Precautions 94 Mechanical Disassembly 95 Replaceable Parts 101 To order replaceable parts 101 6 Characteristics and Specifications ...
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Page 13: ...n and display 39 Figure 1 15 2 wire Ω terminal connection and display 41 Figure 1 16 4 wire Ω terminal connection and display 41 Figure 1 17 Forward biased diode continuity test terminal connection and display 44 Figure 1 18 Reverse biased diode continuity terminal connection and display 44 Figure 1 19 2 wire continuity test terminal connection and display 46 Figure 1 20 Reading rate annunciator 4...
Page 14: ...3 3 Terminal connection when measuring AC voltage and frequency on an AC circuit 69 Figure 3 4 Terminal connection when measuring DC voltage and DC current on a transistor circuit or load 71 Figure 3 5 Terminal connection when measuring resistance using 2 wire mode 72 Figure 3 6 Terminal connection when measuring resistance using 4 wire mode 73 ...
Page 15: ...Description for dual display combination 62 Table 2 4 Setup menu and communication parameters 63 Table 3 1 Typical combinations and applications when using dual display 66 Table 4 1 Recommended test equipments 77 Table 4 2 DC voltage verification test 80 Table 4 3 DC current verification test 81 Table 4 4 2 wire Ω verification test 82 Table 4 5 4 wire Ω verification test 83 Table 4 6 Diode verific...
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Page 17: ...t U3402A Dual Display Multimeter 18 Stacking the U3402A 21 Adjusting the Handle 22 Product at a Glance 23 Making Measurements 34 Selecting a Range 47 Setting the Reading Rate 49 This chapter provides an introduction to the U3402A digital multimeter and a tutorial showing how to use the front panel in order to make measurements ...
Page 18: ...inuity test Diode test Five math operations dBm Min Max Relative Rel Compare Comp Hold True RMS measurement for both AC DC votage and current Wide AC and DC current measurememt range from 12 mA to 12 A Resistance measurement up to 120 MΩ with 1 mΩ resolution at slow reading rate or up to 300 MΩ with 10 mΩ and 100 mΩ resolution at medium and fast reading rate respectively Frequency measurement up t...
Page 19: ...and materials identical to those used in the factory pakaging are available through Keysight Technologies office If the multimeter is being returned to Keysight Technologies for servicing attach a tag indicating the type of service required return address model number and serial number Also mark the container FRAGILE to assure careful handling In any correspondence refer to the multimeter by model...
Page 20: ...enabled If self test is successful the multimeter goes to normal operation If the self test fails either a full annunciator or a blank display is displayed without entering the normal operation In the unlikely event that the self test repeatedly fails contact your nearest Keysight Sales and Service Office NOTE The multimeter will operate at any line voltage between 90 VAC and 264 VAC when the line...
Page 21: ...pped with specially designed anti slip protective bumpers on the front panel and rear panel The multimeters will not slide off when stacked on top of each other To be able to stack the U3402A multimeters ensure the attached bumpers are in correct orientation Refer to Figure 1 1 Figure 1 1 Stacking the U3402A ...
Page 22: ...n rotate the handle to the desired position Figure 1 2 below shows the possible handle positions Figure 1 2 Type of handle position To attach or detach the handle rotate the handle upright and pull it out from the sides of the multimeter Refer to Figure 1 3 Figure 1 3 Attaching and detaching the handle Benchtop position Carrying position Handle removal position ...
Page 23: ...Getting Started Tutorial 1 Keysight U3402A User s and Service Guide 23 Product at a Glance Product dimensions Front view Side view Figure 1 4 U3402A dimensions 226 0 mm 105 0 mm 305 0 mm ...
Page 24: ...Service Guide The front panel at a glance Figure 1 5 Front panel Primary display Secondary display Input terminals and current fuse Power on off switch Shift Math operation keypads Autoranging manual range and comparator operation Measurement function keypads ...
Page 25: ...nciators Annunciator Description Primary display S Reading rate Slow M Reading rate Medium F Reading rate Fast PEAK Peak measurement Not applicable for the U3402A HOLD Data hold MIN MinMax math operation Minimum value shown on the primary display MAX MinMax math operation Maximum value shown on the primary display REL Relative value dBm Decibel unit relative to 1 mW 4 2 W 4 wire 2 wire resistance ...
Page 26: ...sistance unit Ω kΩ MΩ MkHz Frequency unit Hz kHz MHz Secondary display Polarity digits and decimal points for secondary display µnmF Capacitance unit nF µF mF Not applicable for the U3402A ºC Celcius temperature unit Not applicable for the U3402A ºF Fahrenheit temperature unit Not applicable for the U3402A Duty cycle measurement Not applicable for the U3402A mV Voltage unit mV V µmA Current unit µ...
Page 27: ...e Not applicable for the U3402A EXT External Not applicable for the U3402A TRIG Trigger mode Not applicable for the U3402A REMOTE Remote interface control For calibration use only LOCAL Local mode STO Store instrument state Not applicable for the U3402A RCL Recall stored instrument state Not applicable for the U3402A Table 1 1 Display annunciators continued Annunciator Description ...
Page 28: ...lay and emits a beep Figure 1 7 Keypad Table 1 2 Keypad functions Key Description System related operation Press to power on or power off the U3402A multimeter Press to select Shift Press to return the multimeter to front panel operation when it is in remote state Press to step through the Setup menu See Using the Setup Menu on page 63 for more information Press to enable the secondary display Pre...
Page 29: ...C voltage measurement Press to select the AC DC current measurement Press to toggle between the 2 wire resistance or 4 wire resistance measurement Press to select the frequency measurement Press to toggle between the diode and continuity measurement Press to select dBm measurement Press to toggle between manual ranging and autoranging Press to select a higher range and disable autoranging See Sele...
Page 30: ...set the low limit for compare math operation Press to enable Hold math operation See Hold on page 58 for more information Press to select the reference impedance for dBm measurement Press to enable the MinMax math operation Press to select the reading rate See Setting the Reading Rate on page 49 for more information Press to select the relative math operation Press to toggle in and out of the rela...
Page 31: ...put limit NOTE Voltages above 300 VAC may be measured only in circuits that are isolated from mains However transient overvoltages are also present on circuits that are isolated from mains The Keysight U3402A is designed to safely withstand occasional transient overvoltages up to 2500 V PEAK Do not use this multimeter to measure circuits where transient overvoltages could exceed this level ...
Page 32: ...1000 VDC AC voltage VAC frequency Hz 750 VAC RMS 1100 V PEAK 2x107 V Hz normal mode or 1x106 V Hz common mode Miliampere mA frequency Hz mA 1200 mADC or AC RMS 12A frequency Hz 12A 12 ADC or AC RMS for continuous 30 seconds or 10 ADC or AC RMS 2 wire resistance Ω 2W V Ω Hz 500 VDC or AC RMS Diode test continuity test 4 wire resistance Ω 4W Hi 250 VDC or AC RMS All functions Any terminal to earth 1...
Page 33: ...02A User s and Service Guide 33 The rear panel at a glance Figure 1 9 Rear panel Line voltage fuse selection table AC power connector AC line fuse Chassis ground lug RS232 interface connector For calibration use only AC line voltage selector ...
Page 34: ... current measurement using the A input terminal you are recommended to wait for approximate ten minutes before measuring a low level DC measurements of volts amperes or ohms to achieve accurate measurement This is due to the thermal voltages generated during the high current measurements that may cause errors when measuring the low level measurements WARNING Exceeding the crest factor limit may re...
Page 35: ...ures the AC component with up to 400 VDC bias on any range Crest factor Maximum 3 0 at full scale Input impedance 1 MΩ 2 in parallel with 120 pF on all ranges Input protection 750 V RMS on all ranges 1 Press 2 Connect the red and black test leads to the respective input terminals as shown in Figure 1 10 3 Probe the test points and read the display In auto ranging mode the multimeter automatically ...
Page 36: ...0 V 400 0 V 1000 V Measurement method Sigma Delta A to D converter Input impedance 10 MΩ 2 range typical Input protection 1000 V on all ranges 1 Press 2 Connect the red and black test leads to the respective input terminals as shown in Figure 1 11 3 Probe the test points and read the display In autoranging mode the multimeter automatically selects the appropriate range and the measurement is displ...
Page 37: ... reading rate 40 00 mA 120 0 mA 1 200 A Shunt resistance 0 1 Ω to 10 Ω for 12 mA to 1 2 A range Input protection Front panel 1 25 A 500 V FH fuse for one terminal 1 Press or 2 Power off the measured circuit 3 Connect the red and black test leads to mA input terminal as shown in Figure 1 12 4 Probe the test points in series with the circuit 5 Power on the measured circuit and read the display Figur...
Page 38: ...2A terminal 1 Press or 2 Power off the measured circuit 3 Connect the red and black test leads to the A input terminal as shown in Figure 1 13 4 Probe the test points in series with the circuit 5 Power on the measured circuit and read the display Figure 1 13 ACI RMS or DCI A terminal connection and display NOTE Autoranging is not applicable for current measurement up to 12 A You are required to se...
Page 39: ...nges Gate time 0 1 s or 1 period of the input signal whichever is longer Input protection 750 V RMS on all ranges 1 Press 2 Connect the red and black test leads to the input terminal as shown in Figure 1 14 3 Probe the test points and read the display In auto ranging mode the multimeter automatically selects the appropriate range and the measurement is displayed Figure 1 14 Frequency terminal conn...
Page 40: ... ohms open circuit voltage limited to 9 V Input protection 500 V on all ranges 1 Press The default function is 2 wire Ω measurement 2 Connect the red and black test leads to the input terminal as shown in Figure 1 15 or Figure 1 16 on page 41 respectively according to the selected measurement method 3 Probe the test points by shunting the resistor and read the display In auto ranging mode the mult...
Page 41: ...rted Tutorial 1 Keysight U3402A User s and Service Guide 41 Figure 1 15 2 wire Ω terminal connection and display Figure 1 16 4 wire Ω terminal connection and display Resistance Test current Resistance Test current ...
Page 42: ...n below Measurement method 0 5 mA 0 2 constant current source open circuit voltage limited to 9 V Response time 70 samples per seconds with audible tone Gate time 0 1 s or 1 period of the input signal whichever is longer Input protection 500 V RMS on all ranges Reading rate Measurement display Slow 1 2 V range Medium 2 5 V range Fast 4 0 V range NOTE The measurement value will display OL overload ...
Page 43: ... lead to the negative terminal cathode Refer to Figure 1 17 4 Read the display 5 Reverse the probes and measure the voltage across the diode again as shown in Figure 1 18 Assess the diode according to the following guidelines A diode is considered good if the multimeter displays OL in reverse bias mode A diode is considered shorted if the multimeter displays approximately 0 V in both forward and r...
Page 44: ...U3402A User s and Service Guide Figure 1 17 Forward biased diode continuity test terminal connection and display Figure 1 18 Reverse biased diode continuity terminal connection and display Forward bias Test current Reverse bias Test current ...
Page 45: ...method 0 5 mA 0 2 constant current source open circuit voltage limited to 9 V Continuity threshold 10 Ω fixed Input protection 500 V RMS on all ranges 1 Press to toggle to the continuity measurement function 2 Connect the red and black test leads to the input terminal as shown in Figure 1 19 3 Probe the test points and read the display Reading rate Measurement display Slow 120 000 Ω range Medium 4...
Page 46: ...1 Getting Started Tutorial 46 Keysight U3402A User s and Service Guide Figure 1 19 2 wire continuity test terminal connection and display Resistance Test current ...
Page 47: ...is similar and is unable to be changed independently Autoranging is selected at default factory power on Manual ranging If the input signal is greater than can be measured on the selected range the multimeter will display an overload indication OL on the primary or secondary display front panel The multimeter remembers the selected ranging method auto or manual and the selected manual range for ea...
Page 48: ...0 V 40 000 V 400 00 V 750 0 V 400 0 mV 4 000 V 40 00 V 400 0 V 750 V DCI ACI DCI ACI 12 0000 mA 120 000 mA 1200 00 mA 40 000 mA 120 00 mA 1200 0 mA 40 00 mA 120 0 mA 1200 mA DCI ACI DCI ACI 12 0000 A a 12 000 A a 12 00 A a Manual only Frequency 1200 00 Hz 12 0000 kHz 120 000 kHz 1 00000 MHz 1200 0 Hz 12 000 kHz 120 00 kHz 1 0000 MHz 1200 Hz 12 00 kHz 120 0 kHz 1 000 MHz Resistance b 120 000 Ω 1 20...
Page 49: ...ed at the corner left of the display indicates the selected rate on the primary display Refer to Figure 1 20 Figure 1 20 Reading rate annunciator Press to cycle through the available reading rates S M or F Table 1 5 Reading rates for single function measurements Reading rate Resolution Display counts a b Slow 5 119 999 Medium 4 39 999 Fast 3 3 999 Notes a In VDC 1000 V range the display counts is ...
Page 50: ...1 Getting Started Tutorial 50 Keysight U3402A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Page 51: ...Service Guide 51 2 Operations and Features Operating Math Operations 52 Combination of Math Operations 59 Using the Secondary Display 61 Using the Setup Menu 63 This chapter explains the various functions and features available to the U3402A digital multimeter ...
Page 52: ...can be turned on at a time When selecting another math operation when one is already on you are required to turn off the first operation and then turn on the second math operation All math operations are automatically turned off when changing the measurement functions Range changing is allowed for all math operations Table 2 1 Math operations for different measurement functions Measurement functio...
Page 53: ... 21 reference impedance values 2 Ω 4 Ω 8 Ω 16 Ω 50 Ω 75 Ω 93 Ω 110 Ω 124 Ω 125 Ω 135 Ω 150 Ω 250 Ω 300 Ω 500 Ω 600 Ω 800 Ω 900 Ω 1000 Ω 1200 Ω or 8000 Ω If reference impedance 2 Ω 4 Ω 8 Ω or 16 Ω is selected the dBm operation is displayed in watt power Numeric results are in the range of 120 000 dBm with 0 01 dBm resolution shown independent of the number of digits setting The dBm operation can be...
Page 54: ...ch reading is the difference between a stored relative value and the input signal For example this feature can be used to make more accurate resistance measurements by nulling the test lead resistance After you enable the Rel operation the multimeter stores the next reading as a Rel relative base and immediately displays on the primary display Primary Display Reading Rel Figure 2 2 Typical Rel ope...
Page 55: ...ements When enabled the MinMax operation turns on the MINMAX annunciator and begins accumulating various statistics of the readings being displayed Figure 2 3 Typical Max operation display NOTE In resistance measurement mode the multimeter will read a non zero value even when the two test leads are in direct contact because of the resistance of these leads Use the Rel operation to zero adjust the ...
Page 56: ...atistics are MAX maximum reading since MinMax was enabled MIN minimum reading since MinMax was enabled MINMAX actual readings Procedure 1 Press to enable MinMax operation 2 Press to cycle through the available MINMAX operations MIN MAX or MINMAX 3 Press to disable the MinMax operation NOTE When MinMax is enabled the measurement range changed to manual ranging and the current measurement mode is lo...
Page 57: ... always be a more positive number than the lower limit The initial factory setting for LO limit is 0 The secondary display shows PASS when readings are within the specified limits The secondary display shows HI when the reading is outside the high limit and LO when the reading is outside the low limit When the beeper is ON see Using the Setup Menu on page 63 the beeper beeps on the transition from...
Page 58: ...y display 5 Use and to modify the lower limit 6 Press to store the specified value 7 Press to enable the Comp operation 8 Press to disable the Comp operation or exit Hold The reading hold feature allows you to capture and hold a reading on the front panel display When enabled the Hold operation turns on the Hold annunciator and hold the reading Procedure 1 Press to hold the reading on the display ...
Page 59: ... operation as below 1 Press to enable dBm operation 2 Press to take dBm readings as Rel for new measurement 3 Press to record the Max value as the new Rel upper limit 4 Press to record the Min value as the new Rel lower limit 5 Press to enable the Comp operation The step by step sequence and readings of the combined math operations are shown in Table 2 2 on page 60 when all math operations are use...
Page 60: ...o Math operation sequence Description Readings 1 dBm Reading is calculated to a dBm operation A 2 Rel dBm reading A is taken as Rel B 3 Min Min reading of relative dB is recorded as a new Rel B C 4 Max Max reading of relative dB is recorded as a new Rel B D 5 Comp Compare operation is performed based on the readings of C and D E 1 Press 2 Press 3 Press 5 Press 4 Press ...
Page 61: ...ied function keys such as or to enable the secondary display mode The 2ND annunciator is displayed along with the secondary display Figure 2 8 Secondary display To disable the secondary display mode 1 Press Table 2 3 details the available input combinations for both primary and secondary display when dual display mode is selected Secondary display 2ND annunciator ...
Page 62: ...s the primary displays manual range mode b The frequency measurement corresponding to the current input signals other measurements are corresponding to the voltage input signals c In dual display mode users are recommended to measure the resistance up to 1 MΩ d At 12 A range manual range mode is selected by default e Measurable with non guaranteed accuracy f Autoranging mode by default g The volta...
Page 63: ...ce parameters bAUd Baud rate for remote communication with a PC remote control 9600 300 600 1200 2400 4800 or 9600 PArtY Parity bit for remote communication with a PC None None odd or even dAtA Data bit length for remote communication with a PC 8 7 or 8 StoP Stop bit 1 1 or 2 Echo ECHO Return a character to PC in remote communication OFF ON or OFF Print Printer Only Print measured data to a PC in ...
Page 64: ...EEP a Use and to select the desired parameter b Press to confirm the selected parameter c Press to quit from the Setup menu d The configuration settings is saved and main display is displayed If you select rS232 a Press to enter the second tier menu b Use and to select the desired configurable items c Use and to select the desired parameters d Press to confirm the selected parameter e Press to qui...
Page 65: ...ter User s and Service Guide 65 3 Application Tutorial Applications for Using Dual Display 66 Dual Display Operation Examples 67 This chapter describes the advanced features and the possible applications for effective operation of the multimeter ...
Page 66: ...ply 2 ACV DCV DCV 3 DCV DCI Test power supply load regulation Check loop current and voltage drop level Test line and load regulation Test AC to DC or DC to AC converters Measure DC level and AC ripple of power supply Test transformer 4 DCV ACI 5 ACI DCI DCV 6 ACV DCI 7 ACI DCI ACV 8 ACV ACI 9 ACV Frequency Measure AC frequency response of amplifier circuit Adjust AC motor control 10 ACI Frequency...
Page 67: ...ipple can be displayed through both display while testing a rectifier circuit 1 Connect the red and black test leads to the input terminal and probe the test points as shown in Figure 3 1 Figure 3 1 Terminal connection when measuring DC voltage and AC ripple on a rectification circuit 2 Press to select DC voltage measurement for primary display 3 Press to enable the secondary display The 2ND is di...
Page 68: ...esting a rectifier circuit 1 Connect the red and black test leads to the input terminal and probe the test points as shown in Figure 3 2 Figure 3 2 Terminal connection when measuring AC and DC current on a rectification circuit NOTE Press to disable the secondary display Press to select the suitable range if DCV ACV ripple is above the scale of the current range WARNING Make sure you select the co...
Page 69: ...ct DC current measurement for secondary display Measure AC Voltage and Frequency on an AC Circuit A single measurement for both AC voltage and frequency can be displayed through both display while testing a rectifier circuit 1 Connect the red and black test leads to the input terminal and probe the test points as shown in Figure 3 3 Figure 3 3 Terminal connection when measuring AC voltage and freq...
Page 70: ...anging or manual ranging for secondary display Measure DC Voltage and DC Current on a Transistor Circuit or Load A single measurement for both DC voltage and current can be displayed through both display while testing a transistor amplifier circuit You may also check the Hfe or calculate the DC load consumption by using the dual display NOTE Press to disable the secondary display WARNING Make sure...
Page 71: ...urrent on a transistor circuit or load 2 Press to select DC voltage measurement for primary display 3 Press Use and to select autoranging or manual ranging for primary display 4 Press to enable the secondary display The 2ND is displayed 5 Press to select DC current measurement for secondary display 6 Press Use and to select autoranging or manual ranging for secondary display DC voltage source Load...
Page 72: ...sing 2 wire mode 2 Press to select the 2 wire Ω measurement for primary display The 2W is displayed 3 Press Use and to select autoranging or manual ranging for primary display WARNING Do not apply voltage exceeding 500 V PEAK between V Ω Hz and Lo input terminals Resistance NOTE When measuring low resistance you may use the Rel operation to reduce the measurement error created by the test leads re...
Page 73: ...Figure 3 6 Figure 3 6 Terminal connection when measuring resistance using 4 wire mode 2 Press to select the 4 wire Ω measurement for primary display The 4W is displayed 3 Press Use and to select autoranging or manual ranging for primary display WARNING Do not apply voltage exceeding 250 V PEAK between Sense Hi and Sense Lo terminals and 500 V PEAK between V Ω Hz and Lo input terminals Resistance ...
Page 74: ...f the AC voltage and AC current 1 Press and or and simultaneously The multimeter will measure the DC and AC signals alternatively calculate and display the AC DC RMS value using the equation below AC DC RMS DC2 AC2 NOTE When AC DC voltage measurement is selected the DCV input impedance is paralleled with the AC coupled 1 1 MΩ AC divider ...
Page 75: ...rmance test procedures allow you to verify that the multimeter is operating within its published specifications WARNING Shock hazard Only service trained personnel who are aware of the hazards involved should perform the procedures in this chapter To avoid electrical shock and personal injury make sure to read and follow all test equipment safety instructions Use only completely electrically insul...
Page 76: ...tion Interval A one year interval is adequate for most applications Accuracy specifications are warranted only if adjustment is made at regular calibration intervals Accuracy specifications are not warranted beyond the one year calibration interval Keysight does not recommend extending calibration intervals beyond two years for any application When an adjustment is required contact your local Keys...
Page 77: ...asured from the source can be entered into the instrument as the target calibration value Table 4 1 Recommended test equipments Application Recommended equipment Recommended accuracy requirements Zero calibration Shorting plug Dual banana plug with copper wire short between the two terminals DC voltage Fluke 5520A 1 5 instrument 1 year spec DC current Fluke 5520A 1 5 instrument 1 year spec Resista...
Page 78: ...ative humidity is less than 80 Allow a one hour warm up period with a shorting plug connected to the Hi and Lo input terminals Use shielded twisted pair PTFE insulated cables to reduce settling and noise errors Keep the input cables as short as possible NOTE Please ensure that the calibration standards and test procedures used do not introduce additional errors Ideally the standards used to verify...
Page 79: ...against the one year test limits After acceptance you should repeat the performance verification tests at every calibration interval If the instrument fails performance verification adjustment or repair is required Contact your local Keysight Service Center for details This test checks the full scale reading accuracy of the instrument DC Voltage Verification Test 1 Connect the calibrator to the fr...
Page 80: ...mV 0 00 V 1000 V 50 mV Medium 0 00 V 400 mV 50 µV 0 0000 V 4 V 500 µV 0 000 V 40 V 5 mV 0 00 V 400 V 50 mV 0 0 V 1000 V 0 5 V Slow 100 000 mV 120 mV 0 02 mV 1 00000 V 1 2 V 0 17 mV 10 0000 V 12 V 1 7 mV 100 000 V 120 V 17 mV 1000 00 V 1000 V 170 mV Medium 360 00 mV 400 mV 90 µV 3 6000 V 4 V 900 µV 36 000 V 40 V 9 mV 360 00 V 400 V 90 mV 1000 0 V 1000 V 0 6 V CAUTION Set the calibrator output to 0 ...
Page 81: ...te source settling when using the Fluke 5520A Table 4 3 DC current verification test Function Reading rate Input Range Error from nominal one year DC current Slow 0 0000 mA 12 mA 1 5 µA 0 000 mA 120 mA 5 µA 0 00 mA 1200 mA 50 µA 0 0000 A 12 A 0 5 mA Medium 0 000 mA 40 mA 6 µA 0 00 mA 120 mA 30 µA 0 0 mA 1200 mA 0 3 mA 0 000 A 12 A 3 mA Slow 10 0000 mA 12 mA 6 5 µA 100 000 mA 120 mA 55 µA 1000 00 m...
Page 82: ...ire Ω verification test Function Reading rate Input Range Error from nominal one year 2 wire Ω Slow 0 000 Ω 120 Ω 8 mΩ a 0 00000 Ω 1 2 kΩ 50 mΩ a 0 0000 Ω 12 kΩ 0 5 Ω a 0 000 Ω 120 kΩ 5 Ω 0 00000 Ω 1 2 MΩ 50 Ω 0 0000 Ω 12 MΩ 0 5 kΩ 0 000 Ω 120 MΩ 8 kΩ Medium 0 00 Ω 400 Ω 50 mΩ a 0 0000 Ω 4 kΩ 0 3 Ω a 0 000 Ω 40 kΩ 3 Ω a 0 00 Ω 400 kΩ 30 Ω 0 0000 Ω 4 MΩ 0 3 kΩ 0 000 Ω 40 MΩ 3 kΩ 0 00 Ω 300 MΩ 50 kΩ...
Page 83: ...a 36 000 kΩ 40 kΩ 25 Ω a 360 00 kΩ 400 kΩ 250 Ω 3 6000 MΩ 4 MΩ 5 7 kΩ 20 000 MΩ 40 MΩ 303 kΩ 200 00 MΩ 300 MΩ 10 05 MΩ Notes a Specifications are for 2 wire ohms function using the Rel operation enabled to eliminate lead resistance Table 4 4 2 wire Ω verification test continued Function Reading rate Input Range Error from nominal one year Table 4 5 4 wire Ω verification test Function Reading rate ...
Page 84: ...Ω 100 000 kΩ 120 kΩ 55 Ω 1 00000 MΩ 1 2 MΩ 0 55 kΩ 10 0000 MΩ 12 MΩ 30 5 kΩ 100 000 MΩ 120 MΩ 3 008 MΩ Medium 360 00 Ω 400 Ω 0 23 Ω a 3 6000 kΩ 4 kΩ 2 1 Ω 36 000 kΩ 40 kΩ 21 Ω 360 00 kΩ 400 kΩ 0 21 kΩ 3 6000 MΩ 4 MΩ 5 7 kΩ 20 000 MΩ 40 MΩ 0 303 kΩ 200 00 MΩ 300 MΩ 10 05 MΩ Notes a Specifications are for 4 wire ohms function using the Rel operation enabled to eliminate lead resistance Table 4 5 4 w...
Page 85: ...quency Verification Test Configuration Frequency 1 Select the frequency function 2 Select each range in the order shown in Table 4 7 Provide the input voltage and frequency indicated Compare measurement results to the appropriate test limits shown in Table 4 7 Be certain to allow for appropriate source settling Table 4 6 Diode verification test Function Reading rate Voltage Range Error from nomina...
Page 86: ...e year AC voltage Slow 12 000 mV 1 kHz 120 mV 0 124 mV 100 000 mV 1 kHz 120 mV 0 3 mV 0 12000 V 1 kHz 1 2 V 1 24 mV 1 00000 V 1 kHz 1 2 V 3 mV 1 2000 V 1 kHz 12 V 12 4 mV 10 0000 V 1 kHz 12 V 30 mV 12 000 V 1 kHz 120 V 124 mV 100 000 V 1 kHz 120 V 0 3 V 120 00 V 1 kHz 750 V 1 24 V 750 00 V 1 kHz 750 V 2 5 V Medium 40 00 mV 1 kHz 400 mV 0 48 mV 360 00 mV 1 kHz 400 mV 1 12 mV 0 4000 V 1 kHz 4 V 4 8 ...
Page 87: ...ing rate Current Input frequency Range Error from nominal one year AC current Slow 1 2000 mA 1 kHz 12 mA 16 µA 10 0000 mA 1 kHz 12 mA 60 µA 12 000 mA 1 kHz 120 mA 0 16 mA 100 000 mA 1 kHz 120 mA 0 6 mA 120 00 mA 1 kHz 1200 mA 1 6 mA 1000 00 mA 1 kHz 1200 mA 6 mA 1 2000 A 1 kHz 12 A 22 mA 10 000 A 1 kHz 12 A 110 mA Medium 4 000 mA 1 kHz 40 mA 60 µA 36 000 mA 1 kHz 40 mA 0 22 mA 12 00 mA 1 kHz 120 m...
Page 88: ...4 Performance Test 88 Keysight U3402A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Page 89: ...embly and Repair Operating Checklist 90 Types of Service Available 91 Mechanical Disassembly 95 Replaceable Parts 101 This chapter will help you troubleshoot a faulty multimeter It describes how to disassemble the multimeter how to obtain repair services and lists the replaceable parts ...
Page 90: ...heck the following items Is the multimeter inoperative 4 Verify the power line voltage setting 4 Verify the power line fuse is installed 4 Verify that the power cord is connected to the multimeter and to AC line power 4 Verify the front panel power switch is depressed See page 93 Is the multimeter s current input inoperative 4 Verify the current input fuse ...
Page 91: ...btain service for your instrument in warranty under service contract or post warranty contact your nearest Keysight Technologies Service Center They will arrange to have your instrument repaired or replaced and can provide warranty or repair cost information where applicable To obtain warranty service or technical support information you can contact Keysight Technologies at one of the following te...
Page 92: ...kaging material for shipping Secure the container with strong tape or metal bands If the original shipping container is not available place your instrument in a container which will ensure at least 4 inches of compressible packaging material around all sides for the instrument Use static free packaging materials to avoid additional damage to your instrument Keysight suggests that you always insure...
Page 93: ...size and rating Table 5 1 Type of supplied fuse according to country of destination Type of fuse time lag low breaking fuse Input line voltage Part number 0 25A 250V 5x20 mm 100 V to 120 V A02 62 25592 3U 0 125A 250V 5x20 mm 220 V to 240 V A02 62 25648 1U 1 Disconnect the power cord Depress tab 1 and 2 and pull the fuse holder from rear panel 2 Remove the line voltage selector from fuse holder ass...
Page 94: ...size and rating Electrostatic Discharge ESD Precautions Almost all electrical components can be damaged by electrostatic discharge ESD during handling Component damage can occur at electrostatic discharge voltages as low as 50 volts The following guidelines will help prevent ESD damage when servicing the instrument or any electronic device Disassemble instruments only in a static free work area Us...
Page 95: ... from the multimeter 2 Remove the carrying handle by rotating the handle upright and pulling it out from the sides of the multimeter WARNING Shock hazard Only service trained personnel who are aware of the hazards involved should remove the instrument covers To avoid electrical shock and personal injury make sure to disconnect the power cord from the multimeter before removing the covers Some circ...
Page 96: ...ysight U3402A User s and Service Guide 3 Remove the multimeter s bumpers Pull from a corner and stretch the bumpers off the multimeter 4 Remove the rear bezel Loosen the two captive screws in the rear bezel and remove the rear bezel ...
Page 97: ...er Remove the screw at the bottom of the cover and slide the cover off the multimeter Front Panel Removal 1 Remove on off switch push rod Gently move the power switch push rod toward the front of the multimeter to disengage it from the switch Be careful not to twist or bend the push rod ...
Page 98: ...5 Disassembly and Repair 98 Keysight U3402A User s and Service Guide 2 Remove the screw holding the front panel 3 Disconnect the two ribbon cable connectors from the front panel ...
Page 99: ...ht U3402A User s and Service Guide 99 4 Disconnect the individual front panel wires shown below 5 There is now enough play to allow the side of the front panel to be pried from the chassis and removed as an assembly 15 A current fuse ...
Page 100: ... Service Guide Front Panel Disassembly 1 Remove the keyboard and display assembly Remove the two screws holding the circuit board Lift the keyboard and display assembly from the plastic housing a The rubber keypad can now be pulled from the plastic housing ...
Page 101: ...st includes a brief description of each part with applicable Keysight part number To order replaceable parts You can order replaceable parts from Keysight using the Keysight part number Note that not all parts listed are available as field replaceable parts To order replaceable parts from Keysight do the following 1 Contact your nearest Keysight Sales Office or Service Center 2 Identify the parts ...
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Page 103: ...eter User s and Service Guide 103 6 Characteristics and Specifications For the characteristics and specifications of the U3402A 5 Digit Dual Display Multimeter refer to the datasheet at http literature cdn keysight com litweb pdf 5990 3970EN pdf ...
Page 104: ...6 Characteristics and Specifications 104 Keysight U3402A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Page 105: ... is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2009 2016 Edition 10 November 1 2016 Printed in Malaysia U3402 90001 U3402 90001 www keysight com ...
