Keysight U3606B Service Manual Download Page 116

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Service and Maintenance

116

Keysight U3606B Service Guide

Disconnect the two ribbon cable connectors from the front panel.

Disconnect the individual wires (label 1 to 5) from the top layer circuit

board as shown below.

Summary of Contents for U3606B

Page 1: ...Keysight U3606B Multimeter DC Power Supply Service Guide ...

Page 2: ...ustomarily 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 pursuant to th...

Page 3: ...the instrument Direct current DC Off supply Alternating current AC On supply Both direct and alternating current Caution risk of danger refer to this manual for specific Warning or Caution information Earth ground terminal Out position of a bi stable push control Frame or chassis terminal In position of a bi stable push control Category II 300 V over voltage protection CAT II 300 V ...

Page 4: ...Look for cracks or missing plastic Do not operate the device around explosive gas vapor or dust Always use the device with the cables provided Observe all markings on the device before establishing any connection Turn off the device and application system power before connecting to the I O terminals When servicing the device use only the specified replacement parts Do not operate the device with t...

Page 5: ...ative humidity up to 80 RH at 40 C non condensing Proportional to 50 RH from 40 C to 55 C non condensing Storage condition Up to 95 RH at 40 C non condensing Altitude Up to 2000 m Pollution degree 2 NOTE The U3606B complies with the following safety and EMC compliances Safety compliance IEC 61010 1 2001 EN 61010 1 2001 2nd Edition Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 EMC com...

Page 6: ... 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 Canadian Standards Association This symbol indicates the time perio...

Page 7: ...itoring 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 suppo...

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Page 9: ...ght calibration services 18 Calibration interval 18 Adjustment is recommended 19 Time required for calibration 19 Recommended Test Equipment 20 General measurement techniques 23 Using an electronic load 24 Connecting the current monitoring resistor 24 Test Considerations 25 Input and Output Connections 26 Zero Offset Short Verification Test Setup 27 Gain Verification Test Setup 28 Output Verificat...

Page 10: ...ration security code 68 Resetting the security code to the factory default 69 Using the Front Panel for Adjustments 72 Adjustment Considerations 73 Aborting a Calibration in Progress 74 Adjustments Procedures 75 Zero offset adjustment 75 Gain adjustments 76 Output adjustments 89 Finishing the adjustments 99 Calibration Count 100 Calibration Message 101 Calibration Error Codes 102 2 Service and Mai...

Page 11: ...Keysight U3606B Service Guide 11 Mechanical Disassembly 113 General disassembly 113 Replaceable Parts 120 To order replaceable parts 120 Types of Services Available 121 Repackaging for Shipment 122 ...

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Page 13: ... 32 Figure 1 9 Test setup for diode voltage gain verification 33 Figure 1 10 Test setup for constant voltage programming and readback accuracy verification 34 Figure 1 11 Test setup for constant voltage load and line regulation verification 34 Figure 1 12 Test setup for constant voltage noise effect peak to peak and RMS noise verification 35 Figure 1 13 Test setup for load transient response time ...

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Page 15: ...13 Constant voltage load effect load regulation verification test 50 Table 1 14 Constant voltage source effect line regulation verification test 51 Table 1 15 Constant voltage peak to peak noise verification test 53 Table 1 16 Constant voltage RMS noise verification test 54 Table 1 17 Transient response time 55 Table 1 18 Constant current programming and readback accuracy verification test 56 Tabl...

Page 16: ...rrent gain adjustment 87 Table 1 30 Capacitance gain adjustment 88 Table 1 31 Valid output adjustment levels 89 Table 1 32 Constant current output adjustment 91 Table 1 33 Constant voltage output adjustment 94 Table 1 34 List of calibration errors 102 Table 2 1 List of replaceable parts 120 ...

Page 17: ...nce Verification Tests Overview 38 Self Tests 39 Performance Verification Tests 40 Additional Verification Tests 62 Calibration Process 64 Calibration Security 65 Unsecuring the Instrument for Calibration 66 Using the Front Panel for Adjustments 72 Adjustment Considerations 73 Aborting a Calibration in Progress 74 Adjustments Procedures 75 Calibration Count 100 Calibration Message 101 Calibration ...

Page 18: ... are stored in the nonvolatile memory until the next calibration adjustment is performed The nonvolatile EEPROM calibration memory is retained even when the power is switched off after a Factory Reset RST command or after an Instrument Preset SYSTem PRESet command Keysight calibration services When your instrument is due for calibration contact your local Keysight Service Center to enquire about r...

Page 19: ...the re adjustment provides the best long term stability Performance data are measured during the Calibration Security but this does not guarantee that the instrument will remain within these limits unless the adjustments are performed Refer to the Calibration Count on page 100 and verify that all the adjustments have been performed Time required for calibration The instrument can be automatically ...

Page 20: ...1 year specification DC current Calibrator Fluke 5520A 20 of instrument 1 year specification AC voltage Calibrator Fluke 5520A 20 of instrument 1 year specification AC current Calibrator Fluke 5520A 20 of instrument 1 year specification 2 wire and 4 wire resistance Calibrator Fluke 5520A 20 of instrument 1 year specification Frequency voltage and current Calibrator Fluke 5520A 20 of instrument 1 y...

Page 21: ...Bandwidth limit 20 MHz Probe 1 1 with RF tip 10 1 with RF tip for 50 V Fixed resistor 30 Ω 30 W 2 67 Ω 24 W 300 Ω 3 W and 0 33 Ω 3 W Differential amplifier LeCroy DA1855A Bandwidth 20 MHz AC coupling Amplifier 10 50 Ω feed thru termination Pomona 4119 50 Constant voltage RMS noise RMS voltmeter R S URE3 or equivalent 20 Hz to 20 MHz Differential amplifier LeCroy DA1855A Bandwidth 20 MHz AC couplin...

Page 22: ...d effect load regulation Digital multimeter Keysight 3458A 8 digit resolution Electronic load Keysight 6060B Voltage range 30 Vdc Current range 5 A Open and short switches Current monitoring resistor shunt ISOTEK Co model A H 0 01 Ω 0 1 TCR less than 20 ppm C Constant current source effect line regulation Digital multimeter Keysight 3458A 8 digit resolution Current monitoring resistor shunt ISOTEK...

Page 23: ...ce must be connected directly to the output terminals by using a separate pair of leads Constant current noise effect RMS noise RMS voltmeter R S URE3 or equivalent 20 Hz to 20 MHz Electronic load Keysight 6060B Voltage range 30 Vdc Current range 5 A Open and short switches Differential amplifier LeCroy DA1855A Bandwidth 20 MHz AC coupling Amplifier 10 50 Ω feed thru termination Pomona 4119 50 AC ...

Page 24: ...eed for connecting resistors or rheostats in parallel to handle power it is much more stable than a carbon pile load and it simplifies the work of switching between load conditions as is required for the load regulation and load response tests Substitution of the electronic load requires minor changes to the test procedures in this chapter Connecting the current monitoring resistor To eliminate th...

Page 25: ...isted pair of PTFE insulated cables to reduce settling and noise errors Keep the input cables as short as possible Connect the input cable shields to earth ground Except where noted in the procedures connect the calibrator LO source to earth ground at the calibrator It is important that the LO to earth ground connection be made at only one place in the circuit to avoid ground loops Because the ins...

Page 26: ...na plug with a copper wire short between the two terminals for low thermal offset measurement Shielded twisted pair PTFE interconnecting cables of minimum length are recommended between the calibrator and the U3606B Cable shields should be earth ground referenced This configuration is recommended for optimal noises and settling time performance during calibration ...

Page 27: ...1 Test setup for zero offset short verification For DC voltage DC current a 2 wire resistance and capacitance a Open by removing the shorting plug For 4 wire resistance Connect the shorting plug to the V and LO terminals Connect a 4 wire short copper across the FORCE and terminals and SENSE V and LO terminals ...

Page 28: ...1 Calibration Procedures 28 Keysight U3606B Service Guide Gain Verification Test Setup Figure 1 2 Test setup for DC voltage and AC voltage gain verification Calibrator ...

Page 29: ...cedures 1 Keysight U3606B Service Guide 29 Figure 1 3 Test setup for capacitance gain verification For test values 110 nF 2 wire compensation enabled For test values 110 nF compensation disabled Calibrator Calibrator ...

Page 30: ...edures 30 Keysight U3606B Service Guide Figure 1 4 Test setup for 2 wire resistance gain verification For test values 110 kΩ 2 wire compensation enabled For test values 110 kΩ compensation disabled Calibrator Calibrator ...

Page 31: ...ration Procedures 1 Keysight U3606B Service Guide 31 Figure 1 5 Test setup for 4 wire resistance gain verification Figure 1 6 Test setup for DC current and AC current gain verification Calibrator Calibrator ...

Page 32: ... Calibration Procedures 32 Keysight U3606B Service Guide Figure 1 7 Test setup for frequency voltage gain verification Figure 1 8 Test setup for frequency current gain verification Calibrator Calibrator ...

Page 33: ...Calibration Procedures 1 Keysight U3606B Service Guide 33 Figure 1 9 Test setup for diode voltage gain verification Calibrator ...

Page 34: ...utput Verification Test Setup Figure 1 10 Test setup for constant voltage programming and readback accuracy verification Figure 1 11 Test setup for constant voltage load and line regulation verification Digital multimeter LOAD Digital multimeter Electronic load ...

Page 35: ...effect peak to peak and RMS noise verification Figure 1 13 Test setup for load transient response time verification V V Vout V1 V2 R 1 R 1 R 2 R2 4 3 2 1 Fixed resistor BNC BNC Differential amplifier BNC Oscilloscope 50 Ω termination 50 Ω termination RMS voltmeter 4 3 2 1 LOAD BNC Oscilloscope Electronic load ...

Page 36: ...st setup for constant current programming and readback accuracy verification Figure 1 15 Test setup for constant current load and line regulation verification Digital multimeter Current monitoring resistor LOAD Digital multimeter Current monitoring resistor Electronic load ...

Page 37: ...U3606B Service Guide 37 Figure 1 16 Test setup for constant current RMS noise effect verification V V Vout V1 V2 R 1 R 1 R 2 R2 TCPA300 TCP305 Fixed resistor AC DC converter BNC Differential amplifier BNC 50 Ω termination RMS voltmeter ...

Page 38: ...ons starting on page 155 You can perform three different levels of verification and performance tests Self tests A series of internal verification tests which gives a high confidence that the instrument is operational Performance verification tests An extensive set of tests that are recommended as an acceptance test when you first receive the instrument or after performing adjustments Additional v...

Page 39: ...emote interface see the U3606B Programmer s Reference A list of the possible self test errors is given in Chapter 6 of the U3606B User s Guide List of Error Messages starting on page 181 If repair is required contact the nearest Keysight Service Center You can initiate a more complete self test from the utility menu see Chapter 4 of the U3606B User s Guide Performing a self test starting on page 1...

Page 40: ...y performed for those functions and ranges with unique offset calibration constants Measurements are checked for each function and range as described in the procedure on the next page Zero offset verification procedure 1 Connect the shorting plug low thermal EMF double banana short bar to the V red and LO input terminals see Figure 1 1 Test setup for zero offset short verification on page 27 Leave...

Page 41: ...0 005 V 1000 00 V 0 05 V 2 wire resistance 100 Ω 0 008 Ω 1000 Ω 0 05 Ω 10 kΩ 0 0005 kΩ 100 kΩ 0 005 kΩ 1 MΩ 0 00005 MΩ 10 MΩ 0 0005 MΩ 100 MΩ 0 005 MΩ 4 wire resistance 0 1 Ω 0 00005 Ω 1 Ω 0 0003 Ω 10 Ω 0 003 Ω 100 Ω 0 03 Ω 1000 Ω 0 3 Ω CAUTION Zero offset calibration using a multifunction calibrator is NOT recommended The calibrator and cabling offset can be large and unstable causing poor offset...

Page 42: ... on page 28 2 Press to select the DC voltage function The DC annunciator will turn on according to your selection 3 Select each range in the order shown below Provide the indicated input voltage Compare the measurement results to the appropriate test limits in Table 1 3 Be certain to allow for appropriate source settling when using the Fluke 5520A Table 1 2 Zero offset verification test continued ...

Page 43: ...esults to the appropriate test limits in Table 1 4 be certain to allow for appropriate source settling when using the Fluke 5520A Table 1 3 DC voltage gain verification test Input voltage Range Error from nominal 1 year 19 0000 mV 19 9999 mV 0 0127 mV 100 000 mV 100 000 mV 0 033 mV 1 00000 V 1 00000 V 0 0003 V 10 0000 V 10 0000 V 0 003 V 100 000 V 100 000 V 0 03 V 1000 00 V 1000 00 V 0 3 V CAUTION...

Page 44: ...voltage and frequency Compare the measurement results to the appropriate test limits in Table 1 5 Be certain to allow for appropriate source settling when using the Fluke 5520A Table 1 5 AC voltage gain verification test Input voltage Input frequency Range Error from nominal 1 year 10 mV 1 kHz 100 mV 0 12 mV 100 mV 1 kHz 100 mV 0 3 mV 0 1 V 1 kHz 1 V 0 0012 V 1 V 1 kHz 1 V 0 003 V 1 V 1 kHz 10 V 0...

Page 45: ...Fluke 5520A 2 wire resistance gain verification test 1 Connect the calibrator to the front panel red and LO black input terminals see Figure 1 4 Test setup for 2 wire resistance gain verification on page 30 2 Press to select the resistance function 3 Select each range in the order shown below Provide the indicated input resistance Compare the measurement results to the appropriate test limits in T...

Page 46: ... 1 8 be certain to allow for appropriate source settling when using the Fluke 5520A Table 1 7 2 wire resistance gain verification test Input resistance Range Error from nominal 1 year 100 Ω 100 Ω 0 058 Ω a a Specifications stated are for 2 wire resistance measurements using the Null math operation Without null add an additional error of 0 2 Ω 1 kΩ 1 kΩ 0 00055 kΩ α 10 kΩ 10 kΩ 0 0055 kΩ α 100 kΩ 1...

Page 47: ...in to allow for appropriate source settling when using the Fluke 5520A Frequency current gain verification test 1 Connect the calibrator to the front panel I red and LO black input terminals see Figure 1 8 Test setup for frequency current gain verification on page 32 2 Press Hz ms to select the frequency function Table 1 8 4 wire resistance gain verification test Input resistance Range Error from ...

Page 48: ...he measurement results to the appropriate test limits in Table 1 11 be certain to allow for appropriate source settling when using the Fluke 5520A Output verification test This test verifies that the output functions constant voltage and constant current are within specifications Note that the measurement values over the remote interface should be identical to those displayed on the front panel Ta...

Page 49: ... voltage reading on the digital multimeter Compare the measurement results to the appropriate test limits in Table 1 12 CV load effect load regulation This test measures the change in the output voltage resulting from a change in the output current from full load to no load or vice versa 1 Turn off the instrument and connect a digital multimeter between the front panel red and black output termina...

Page 50: ...r shown below Record the output voltage reading on the digital multimeter 7 Within a few seconds after step 6 operate the electronic load in open mode Record the output voltage reading on the digital multimeter 8 Compare the difference between the measurement results to the appropriate test limits in Table 1 13 9 Repeat step 3 to step 8 for the S2 8 V 3 A and the S2m 1000 mV 3 A ranges CV source e...

Page 51: ... limit and protection values If not adjust the electronic load by increasing the resistance so that the current drops slightly until the U3606B is operating in the constant voltage mode 7 Adjust the AC voltage source to the low line voltage limit Record the output voltage reading on the digital multimeter 8 Within a few seconds after step 7 adjust the AC voltage source to the high line voltage lim...

Page 52: ...ge to select the constant voltage mode Ensure that appropriate range is selected 4 Set the output voltage to the full rated value 30 V for S1 range 8 V for S2 range or 1 V for S2m range and current to full scale Enable the output 5 Configure the differential amplifier as follows a Set to the AC mode positive and negative to remove the DC component b Set to the differential mode c Set the gain to 1...

Page 53: ...eak to peak noise measurement The result should not exceed 0 03 Vpp as shown in Table 1 15 9 Disconnect the oscilloscope and connect an RMS voltmeter in its place Do not disconnect the 50 Ω feed thru termination 10 Configure the RMS voltmeter as follows a Set the high pass filter to 10 Hz b Enable AC coupling 11 Obtain the maximum RMS voltage measurement as indicated in the RMS voltmeter Divide th...

Page 54: ... parallel with a oscilloscope Operate the electronic load in the constant current CC mode 5 Set the electronic load in transient operation mode between one half of the output full rated value and the output full rated value at a 1 kHz rate with 50 duty cycle 6 Set the oscilloscope for AC coupling internal synchronization and lock on either the positive or negative load transient 7 Adjust the oscil...

Page 55: ...606B Service Guide 55 Figure 1 17 Graph of load transient response time for S1 range Table 1 17 Transient response time Output voltage Range parameter Error from nominal 1 year 30 V S1 30 V 100 μs 8 V S2 8 V 100 μs 1 V S2m 1000 mV 100 μs ...

Page 56: ... readback accuracy verification on page 36 2 Turn on the instrument Press Current to select the constant current mode Ensure that the appropriate range is selected 3 Output each of the full rated value in the order shown below Divide the voltage drop reading on the digital multimeter across the current monitoring resistor by its resistance Record and compare the measurement results to the appropri...

Page 57: ...that the U3606B is operating within the specified limit and protection values If not adjust the electronic load by reducing the resistance so that the voltage drops slightly until the U3606B is the constant current CC mode For the S1m range operate the electronic load in constant resistance mode and set its resistance to 300 Ω Ensure that the U3606B is operating within the specified limit and prot...

Page 58: ...t current to the full rated value 1 A for S1 range 3 A for S2 range or 0 1 A for S1m range and voltage to full scale Enable the output 5 Operate the electronic load in constant voltage CV mode and set its voltage 30 V for S1 range or 8 V for S2 range Ensure that the U3606B is operating within the specified limit and protection values If not adjust the electronic load by reducing the resistance so ...

Page 59: ...e from 20 Hz to 20 MHz with the U3606B operating in the constant current CC mode 1 Turn off the instrument and connect a fixed resistor 30 Ω for S1 range 2 67 Ω for S2 range or 300 Ω for S1m range between the front panel red and black output terminals see Figure 1 16 Test setup for constant current RMS noise effect verification on page 37 2 Connect an AC DC converter to the fixed resistor and a 50...

Page 60: ...ntial amplifier as follows a Set to the AC mode positive and negative to remove the DC component b Set to the differential mode c Set the gain to 10 d Set the attenuation to 1 e Set the low pass filter to 20 MHz bandwidth limit to filter out input signals containing higher frequencies f Set to the zero precision current generator g Set the input impedance to 1 MΩ 8 Configure the RMS voltmeter as f...

Page 61: ...06B Service Guide 61 Table 1 21 Constant current RMS noise verification test Output current Range parameter Error from nominal 1 year 1 A with 30 Ω S1 1 A 0 001 Arms 3 A with 2 67 Ω S2 3 A 0 001 Arms 0 1 A with 300 Ω S1m 100 mA 0 001 Arms ...

Page 62: ...ance value that can be sourced from the Fluke 5520A calibrator is 190 pF c Select the desired range to perform measurement as an example for the 10 00 nF range set measurements to continuous auto trigger and then press Null to perform the Null offset d Press Null again to edit the Null offset value e Deduct the Null value displayed on the DUT s front panel with 190 pF equivalent to 0 19 nF using t...

Page 63: ...sight U3606B Service Guide 63 10 μF 10 μF 0 15 μF 100μF 100μF 1 5 μF 1000 μF 1000 μF 15 μF 10000 μF 10000 μF 250 μF Table 1 22 Optional capacitance gain verification test continued Input capacitance Range Error from nominal 1 year ...

Page 64: ...e Performance Verification Tests Overview on page 38 3 Unsecure the instrument for calibration see Unsecuring the Instrument for Calibration on page 66 4 Prior to performing the adjustments see the Adjustment Considerations on page 73 5 Perform the adjustment procedure see Adjustments Procedures on page 75 6 Secure the instrument against unauthorized calibration see Finishing the adjustments on pa...

Page 65: ...mory and does not change when power has been turned off after a Factory Reset RST command or after an Instrument Preset SYSTem PRESet command The security code may contain up to 12 alphanumeric characters The first character must be a letter The remaining characters can be letters or numbers You do not have to use all 12 characters NOTE Changing the security code from the front panel You can unsec...

Page 66: ...is the factory default setting of ATU3606B When unsecuring from the front panel the code length is four characters and the first three characters ATU are ignored Use this code to unsecure 3606 Example 2 Assume that the calibration security code was set to AT01A234 from the remote interface When unsecuring from the front panel the first three characters and any characters after the seventh through ...

Page 67: ...ode is entered FAiL is displayed for 3 seconds before you return to the Calibration Security Code menu If the correct security code is entered PASS is displayed for 3 seconds before you enter the Adjustment mode V Use the arrow keys to enter the calibration security code Press or to move the cursor Press or to increment or decrement the digit selected 2 To enter the security code 3 1 ...

Page 68: ...disable the security feature by applying a temporary short inside the instrument as described in Resetting the security code to the factory default on page 69 J CAL SEC CODE OFF ATU3606B This command unsecures the instrument for calibration The default security code is ATU3606B The security code can only be changed when the instrument is unsecured J CAL SEC CODE ON ATU3606B This command secures th...

Page 69: ...sassembly on page 113 3 Solder a temporary short between the two exposed metal pads on the main printed circuit PC board assembly The general location is shown in Figure 1 18 On the U3606B PC board the pads are marked as SECUR NOTE If you do not have a record or have lost the record or the security code first try the factory default code 3606 from the front panel or ATU3606B from the remote interf...

Page 70: ...pply power and turn on the instrument 5 The display will show the message CALib The instrument is now unsecured The security code resets to the factory default value 6 Turn off the instrument and remove the power cord 7 Remove the temporary short installed in step 3 8 Reassemble the instrument ...

Page 71: ... you are unsecuring the instrument from the front panel 10 You can now enter a new security code if you wish See Changing the calibration security code on page 68 Be sure you record the new security code CAUTION Never calibrate the instrument while the case is open Reassemble the instrument before performing any calibration procedures ...

Page 72: ...ents This section describes the procedures to perform adjustments from the front panel To unsecure the instrument see Unsecuring the Instrument for Calibration on page 66 Once unsecured CALib is displayed on the lower secondary display to indicate that the instrument is now in Adjustment mode ...

Page 73: ...performing the adjustments 2 Consider the thermal effects as you are connecting the test leads to the calibrator and multimeter It is recommended to wait for 1 minute before you begin the calibration after connecting the test leads CAUTION Never turn off the instrument during an adjustment This may delete the calibration memory for the present function ...

Page 74: ...UTION If you abort a calibration in progress when the instrument is attempting to write new calibration constants to EEPROM you may lose all calibration constants for the function Typically upon re applying power the instrument will report error 705 Cal Aborted You may also generate errors 742 through 748 If this occurs you should not use the instrument until a complete re adjustment has been perf...

Page 75: ...steps outlined below Review the Test Considerations on page 25 before beginning this test 1 Unsecure the instrument to enter the Adjustment mode Connect the shorting plug between the V red and LO black front panel input terminals Leave the current input I red open NOTE After each adjustment finishes successfully the primary display briefly shows PASS If the calibration fails the instrument beeps t...

Page 76: ...surement functions and ranges as the adjustments progress Successful completion of the adjustment is indicated by a short beep and the display briefly showing PASS An adjustment failure is indicated by a long beep and the display showing FAiL along with a calibration error number Correct the problem and repeat step 5 7 Perform the Zero Offset Short Verification Test Setup on page 27 to check the z...

Page 77: ...minute before starting the calibration after connecting the test leads Valid gain adjustment input values Gain adjustment can be accomplished using the following input values CAUTION Never turn off the instrument during a gain adjustment This may cause the calibration memory for the present function to be lost Table 1 23 Valid gain adjustment input values Function Range Valid amplitude input value...

Page 78: ...ed value and the reference value of the adjustment item 3 Configure each adjustment item shown in Table 1 24 Resistance 2 wire 100 Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ 0 9 to 1 1 full scale page 83 DC current 10 mA 100 mA 1000 mA 0 9 to 1 1 full scale page 84 AC current 1 mA 10 mA 100 mA 1000 mA 0 9 to 1 1 full scale page 86 Capacitance 0 4 nF 1 nF 10 nF 100 nF 1 μF 10 μF 100 μF 1000 μF 10000 μF 0 9 to ...

Page 79: ...ng with a calibration error number Correct the problem and repeat this procedure 8 Repeat step 3 through step 7 for each gain adjustment point shown in Table 1 24 9 Verify the DC voltage gain adjustments using the DC voltage gain verification test on page 42 NOTE If the zero offset adjustment procedure has been recently performed prior to the DC voltage gain calibration procedure the adjustment it...

Page 80: ...ows the uncalibrated value and the reference value of the adjustment item 3 Configure each adjustment item shown in Table 1 25 4 Use or to select the adjustment item 5 Apply the input signal shown in the Input column of Table 1 25 6 Enter the actual applied input 10 0000 V 10 V 100 000 V 100 V 1000 00 V 1000 V Table 1 24 DC voltage gain adjustment continued Adjustment item Input voltage CAUTION Se...

Page 81: ...mber Correct the problem and repeat this procedure 8 Repeat step 3 through step 7 for each gain adjustment point shown in Table 1 25 9 Verify the AC voltage gain adjustments using the AC voltage verification test on page 44 Table 1 25 AC voltage gain adjustment Adjustment item Input voltage Vrms Input frequency 10 000 mV 1 kHz 10 mV 1 kHz 100 000 mV 1 kHz 100 mV 1 kHz 1 00000 V 1 kHz 1 V 1 kHz 10 ...

Page 82: ...t 7 Press to start the adjustment The word CALib starts flashing to indicate that the calibration is in progress Successful completion of the adjustment is indicated by a short beep and the display briefly showing PASS An adjustment failure is indicated by a long beep the display showing FAiL along with a calibration error number Correct the problem and repeat this procedure 8 Repeat step 3 throug...

Page 83: ...justment item 5 Apply the input signal shown in the Input column of Table 1 27 6 Enter the actual applied input 7 Press to start the adjustment The word CALib starts flashing to indicate that the calibration is in progress Successful completion of the adjustment is indicated by a short beep and the display briefly showing PASS An adjustment failure is indicated by a long beep the display showing F...

Page 84: ...m 3 Configure each adjustment item shown in Table 1 28 4 Use or to select the adjustment item 5 Apply the input signal shown in the Input column of Table 1 28 Table 1 27 Resistance gain adjustment Adjustment item Input resistance Short Dual banana plug with copper wire short between the two input terminals OPEn Input terminals open remove any test leads or shorting plugs from the input terminals 1...

Page 85: ...lay showing FAiL along with a calibration error number Correct the problem and repeat this procedure 8 Repeat step 3 through step 7 for each gain adjustment point shown in Table 1 28 9 Verify the DC current gain adjustments using the DC current gain verification test on page 43 NOTE Always complete tests in the same order as shown in Table 1 28 Table 1 28 DC current gain adjustment Adjustment item...

Page 86: ... Apply the input signal shown in the Input column of Table 1 29 6 Enter the actual applied input 7 Press to start the adjustment The word CALib starts flashing to indicate that the calibration is in progress Successful completion of the adjustment is indicated by a short beep and the display briefly showing PASS An adjustment failure is indicated by a long beep the display showing FAiL along with ...

Page 87: ...item shown in Table 1 30 4 Use or to select the adjustment item 5 Apply the input signal shown in the Input column of Table 1 30 6 Enter the actual applied input Table 1 29 AC current gain adjustment Adjustment item Input current Input frequency 1 0000 mA 1 kHz 1 mA 1 kHz 10 0000 mA 1 kHz 10 mA 1 kHz 100 000 mA 1 kHz 100 mA 1 kHz 1000 00 mA 1 kHz 1000 mA 1 kHz NOTE If the zero offset adjustment pr...

Page 88: ...ibration error number Correct the problem and repeat this procedure 8 Repeat step 3 through step 7 for each gain adjustment point shown in Table 1 30 9 Verify the capacitance gain adjustments using the Optional capacitance gain verification test on page 62 Table 1 30 Capacitance gain adjustment Adjustment item Input capacitance OPEn Input terminals open remove any test leads or shorting plugs from...

Page 89: ...be accomplished using the following output levels NOTE Front and rear terminal output adjustment The U3606B Multimeter DC Power Supply needs to be calibrated twice once for the front panel output terminals and again for the rear panel output terminals When you have completed the voltage and current output adjustments for the front panel output terminals repeat the entire adjustment procedure again...

Page 90: ...he instrument and connect the front panel red and black output terminals to the I red and LO black input terminals 2 Turn on the instrument Press Current to enter the constant current output calibration 3 The display shows the uncalibrated value and the reference value of the adjustment item 4 Configure each adjustment item shown in Table 1 32 5 Use or to select the adjustment item NOTE Always com...

Page 91: ... repeat this procedure 7 Repeat step 3 through step 6 for each output adjustment item shown in Table 1 32 For adjustment item LOAd1 LOAd2 LOAd3 and LOAd4 connect an additional fixed resistor across the front panel red output terminal and the I red terminal according to the fixed resistors value on Table 1 32 Leave the black terminal and LO black terminal connected 8 Verify the constant current adj...

Page 92: ...ress Voltage to enter the constant voltage output calibration 3 The display shows the uncalibrated value and the reference value of the adjustment item 4 Configure each adjustment item shown in Table 1 33 LOAd1 a 100 mA with additional 300 Ω 3 W fixed resistor LOAd2 a b 6 mA with additional 1000 Ω fixed resistor LOAd3 a 1 A with additional 30 Ω 30 W fixed resistor LOAd4 a 3 A with additional 2 67 ...

Page 93: ... long beep the display showing FAiL along with a calibration error number Correct the problem and repeat this procedure 7 Repeat step 3 through step 6 for each output adjustment item shown in Table 1 33 For adjustment item LOAd1 LOAd2 LOAd3 and LOAd4 connect an additional fixed resistor the front panel red and black output terminals according to the fixed resistors value on Table 1 33 Leave the co...

Page 94: ...tment item Output voltage OUt L AUTO calibration OUt H AUTO calibration LOAd1 a a See step 7 for information on how to connect the LOAd adjustment item 30 V with additional 30 Ω 30 W fixed resistor LOAd2 a 8 V with additional 2 67 Ω 24 W fixed resistor LOAd3 a b b S2 range with a lighter load 8 V with additional 300 Ω 3 W fixed resistor LOAd4 a 1000 mV with additional 0 33 Ω 3 W fixed resistor Fix...

Page 95: ...6B is operating in remote sensing mode the EXT annunciator on the front panel is turned on 3 Perform step 2 through step 6 of the CC output adjustment procedure front output terminals on page 90 Refer to Table 1 32 on page 91 for the constant current output adjustment items 4 Repeat step 3 through step 6 for each output adjustment item shown in Table 1 32 NOTE Ensure that the rear panel sense term...

Page 96: ...on Table 1 32 Leave the rear terminal and LO black terminal connected 5 Verify the constant current adjustments using the CC programming and readback accuracy on page 56 NOTE Do not remove the short bar between the rear panel sense terminals S and S are the rear panel output and terminals See Chapter 3 of the U3606B User s Guide Remote sensing connections starting on page 116 for more information ...

Page 97: ...6B is operating in remote sensing mode the EXT annunciator on the front panel is turned on 3 Perform step 2 through step 6 of the CV output adjustment procedure front output terminals on page 92 Refer to Table 1 33 on page 94 for the constant voltage output adjustment items 4 Repeat step 3 through step 6 for each output adjustment item shown in Table 1 33 NOTE Ensure that the rear panel sense term...

Page 98: ...tions from the output terminals and to the input terminals V and LO intact 5 Verify the constant voltage adjustments using the CV programming and readback accuracy on page 49 NOTE Do not remove the short bar between the rear panel sense terminals S and S are the rear panel output and terminals See Chapter 3 of the U3606B User s Guide Remote sensing connections starting on page 116 for more informa...

Page 99: ...orting plugs and connections from the instrument 2 Reset the calibration message Calibration Message on page 101 3 Record the new calibration count Calibration Count on page 100 4 Press Shift Exit or Shift to exit the adjustment mode 5 The instrument will be secured and returns to normal operation V ...

Page 100: ...turn to the calibration operation after a few seconds of inactivity NOTE The instrument has been calibrated before it left the factory You are recommended to record the initial value of the calibration count once you receive the instrument The calibration count increments up to a maximum of 32767 after which it rolls over to 0 Since the value increments by one for each calibration point a complete...

Page 101: ... You can record a calibration message only when the instrument is unsecured You can read the calibration message from the remote interface only whether the instrument is secured or unsecured To store a calibration message use the CALibration STRing and CALibration STRing commands from the remote interface See the U3606B Programmer s Reference for more information on the CALibration subsystem J CAL...

Page 102: ...Cal signal measurement out of range 708 Cal signal frequency out of range 709 Cal source unfinished 710 EEPROM write failure 720 Cal DCV offset out of range 721 Cal DCI offset out of range 722 Cal RES offset out of range 723 Cal CAP offset out of range 726 Cal RES open out of range 742 Cal checksum failed DCV corrections 743 Cal checksum failed DCI corrections 744 Cal checksum failed RES correctio...

Page 103: ...Calibration Procedures 1 Keysight U3606B Service Guide 103 750 Source board failed on reading 751 Source board failed on sense Table 1 34 List of calibration errors continued Error code Error message ...

Page 104: ...1 Calibration Procedures 104 Keysight U3606B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 105: ...07 Fuse Replacement 108 Electrostatic Discharge ESD Precautions 112 Mechanical Disassembly 113 Replaceable Parts 120 Types of Services Available 121 Repackaging for Shipment 122 This chapter will help you troubleshoot a failing instrument It also describes how to obtain repair services and lists the replaceable assemblies ...

Page 106: ...wer line fuse is installed and not open 4 Verify the power line voltage setting Does the instrument fail self test 1 Remove all test connections to the instrument and run the self test again Errors may be induced by AC signals present on the input terminals of the instrument during the self test Long test leads can act as an antenna causing pick up of AC signals 2 Remove all load connections to th...

Page 107: ...moisture in the terminals can distort readings Cleaning procedures are as follows 1 Turn the instrument off and remove the test leads 2 If possible turn the instrument over and shake out any dirt that may have accumulated in the terminals 3 Wipe the case with a damp cloth and mild detergent do not use abrasives or solvents Wipe the contacts in each terminal with a clean cotton swab moistened with ...

Page 108: ...The supplied fuse is a time lag low breaking 2 A 250 V S B 5 20 mm fuse Keysight part number A02 62 25026 2U If you are certain that the fuse is faulty replace it with one of the same size and rating 1 Disconnect power cord Using a flat blade screwdriver gently pry open the fuse holder assembly as shown below 2 Remove the fuse holder assembly from the rear panel 3 Remove the faulty power line fuse...

Page 109: ...Service and Maintenance 2 Keysight U3606B Service Guide 109 4 Re insert the fuse holder assembly into the rear panel New fuse ...

Page 110: ... panel The fuse is a 3 15 A 500 V F B 6 3 32 mm fuse Keysight part number A02 62 25657 1U If you are certain that the fuse is faulty replace it with one of the same size and rating 1 Disconnect all input terminal connections Place a flat blade screwdriver on the fuse holder assembly as shown below and push in 2 Turn the screwdriver anti clockwise to remove the fuse holder assembly from the front p...

Page 111: ...e Guide 111 3 Remove the faulty current input fuse and replace a new current input fuse into the fuse holder assembly 4 Re insert the fuse holder assembly into the front panel Turn the screwdriver clockwise to fasten the fuse holder assembly in place ...

Page 112: ...elines will help to prevent ESD damage when servicing the instrument or any electronic device Disassemble instruments only in a static free work area Use a conductive work area to reduce static charges Use a conductive wrist strap to reduce static charge accumulation Minimize handling Keep replacement parts in original static free packaging Remove all plastic foam vinyl paper and other static gene...

Page 113: ...e power Remove all cables from the instrument 2 Remove the carry handle Rotate the handle upright and pull out from the sides of the instrument 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 instrument before removing the cover...

Page 114: ...ent bumpers Pull from a corner and stretch the bumpers off the instrument 4 Remove the rear bezel Loosen the two captive screws in the rear bezel with a T10 Torx driver and remove the rear bezel 5 Remove the cover Remove the screws in the bottom of the cover with a T20 Torx driver ...

Page 115: ...r off the instrument Front panel removal 7 Remove the push rod and disconnect the display cable a Turn the instrument over and gently move the power switch push rod towards the front of the instrument to disengage it from the switch Be careful not to twist or bend the push rod ...

Page 116: ...Maintenance 116 Keysight U3606B Service Guide b Disconnect the two ribbon cable connectors from the front panel c Disconnect the individual wires label 1 to 5 from the top layer circuit board as shown below 1 2 3 4 5 ...

Page 117: ...circuit board Loosen the four captive screws in the top layer circuit board with a T20 Torx driver and remove the top layer circuit board Remove the protective metal sheet as well 9 Disconnect the individual wires label 1 to 4 from the bottom layer circuit board as shown below 1 2 3 4 ...

Page 118: ...the two screws holding the front panel with a Phillips screwdriver 11 You can now pry the side of the front panel from the chassis and remove it Front panel disassembly 12 Loosen the two captive screws with a Phillips screwdriver and remove the keypad and display assembly ...

Page 119: ...ve the keypad and display assembly The rubber keypad and VFD display assembly can now be pulled out from the plastic housing 14 To reassemble all the modules again just follow the disassembly procedure in reverse order Rubber keypad VFD display assembly Plastic housing ...

Page 120: ...le 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 by the Keysight part number shown in the replaceable parts list 3 Provide the instrument model number and serial number Table 2 1 List of replaceable parts Part number Description A02 1 25373 1 Cover A02 15 25200 1 Rear bezel A0...

Page 121: ...tain 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 unit 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 telephone...

Page 122: ...ll serial number place the unit in its original container with appropriate packaging material for shipping and secure the container with strong tape or metal bands If the original shipping container is not available place your unit 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 a...

Page 123: ...ect to change without notice Always refer to the English version at the Keysight website for the latest revision Keysight Technologies 2013 2018 Edition 7 June 2018 Printed in Malaysia U3606 90069 U3606 90069 www keysight com ...

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