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3

Operations and Features

44

Keysight U8001A/U8002A User’s and Service Guide

Backlight Operation

This operation provides the backlight for the LCD display. The backlight will be 

enabled by default when power-up.

To turn on the backlight

1

Press on the “Back Light” button. The backlight will be turned on.

To turn off the backlight

1

Press on the “Back Light” button. The backlight will be turned off.

Summary of Contents for U8001A

Page 1: ...Keysight U8001A U8002A Single Output DC Power Supplies User s and Service Guide Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com ...

Page 2: ...fy 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 the FAR and the DFARS and are set forth specifi...

Page 3: ...supply Both direct and alternating current Equipment protected throughout by double insulation or reinforced insulation Three phase alternating current Caution risk of electric shock Earth ground terminal Caution risk of danger refer to this manual for specific Warning or Caution information Protective conductor terminal Caution hot surface Frame or chassis terminal Out position of a bi stable pus...

Page 4: ... liability for customer s failure to comply with these requirements WARNING Do not use the device if it appears damaged or defective Observe all markings on the device before connecting any wiring to the device Do not operate the device in the presence of flammable gases or fumes Do not install substitute parts or perform any unauthorized modification to the device Use only the power adapter provi...

Page 5: ... full rated output 40 C to 55 C for derated output Storage condition 20 C to 70 C Operating Relative Humidity max Up to 95 Altitude Up to 2000 m CAUTION The Keysight U8001A U8002A single output DC power supplies comply with the following safety and EMC requirements IEC 61326 2002 EN61326 1997 A1 1998 A3 2003 CISPR 11 1990 EN55011 1990 Canada ICES 001 2004 Australia New Zealand AS NZS CISPR11 2004 ...

Page 6: ...ations and Media Authority ICES NMB 001 indicates that this ISM device complies with Canadian ICES 001 This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrical electronic product in domestic household waste The CSA mark is a registered trademark of the Canadian Standards Association A CSA mark ind...

Page 7: ...equirement This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste Product category With reference to the equipment types in the WEEE directive Annex 1 this instrument is classified as a Monitoring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste ...

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Page 9: ... Quick Start Preliminary Checkout 16 Output Checkout 17 Voltage output checkout 17 Current output checkout 18 If the Power Supply Does Not Turn On 19 To Rack mount the Instrument 20 2 General Information Front Panel at a Glance 22 Rear Panel at a Glance 23 Display Annunciators 24 Description 25 Installation 27 Initial inspection 27 Cooling and location 28 Output Connections 29 Voltage drops 29 3 O...

Page 10: ...eristics 5 Service Guide Equipment Warranty 50 Types of service available 50 Repackaging for shipment 51 Cleaning 51 Replacement Parts 52 Troubleshooting 53 Line Voltage Conversion 54 Orientation of the voltage selector AC inlet 55 Self Test Procedures 56 Performance Verification and Calibration 57 Recommended test equipment 58 Test consideration 59 Measurement techniques 60 Constant voltage CV ve...

Page 11: ...ures Figure 3 1 Recommended protection circuit for battery charging 40 Figure 5 1 Orientation of voltage selector AC inlet in different voltage selection 55 Figure 5 2 Test setups 60 Figure 5 3 General measurement 61 Figure 5 4 Graph of load transient response 69 ...

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Page 13: ...Keysight U8001A U8002A User s and Service Guide 13 List of Tables Table 1 1 List of rated fuse for line voltages 19 Table 5 1 Replaceable parts 52 Table 5 2 List of equipment 58 ...

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Page 15: ... Quick Start Preliminary Checkout 16 Output Checkout 17 If the Power Supply Does Not Turn On 19 To Rack mount the Instrument 20 This chapter is intended for both the experienced and inexperienced users because it calls attention to certain checks that should be made prior to operation ...

Page 16: ...ct the power cord and turn on the power supply The front panel display will light up while the power supply performs its power on self test The firmware revision is also displayed If the power supply does not turn on properly see page 19 NOTE The power supply is shipped from the factory with a power line cord that has a plug approriate for your location Your power supply is equipped with a 3 wire ...

Page 17: ...the outputs The OFF annunciator turns off Notice that the display is in the meter mode Meter mode means that the display shows the output voltage and current limit 3 Check that the front panel voltmeter properly responds to knob control 4 Turn the knob clockwise or counter clockwise to check that the voltmeter responds to knob control and the ammeter indicates nearly zero 5 Ensure that the voltage...

Page 18: ...4 Adjust the voltage limit value to 1 0 volt Set the display to the limit mode Adjust the voltage limit to 1 0 V to assure CC operation The CC annunciator will be turned on To go back to normal mode press the key again or let the display time out after several seconds 5 Set the knob to the current control to check that the front panel ammeter properly responds to knob control Turn the knob clockwi...

Page 19: ...y into is energized Then verify that the power supply is turned on 2 Verify the power line voltage setting The line voltage is set to the proper value for your country when the power supply is shipped from the factory Change the voltage setting if it s not correct The settings are 100 115 or 230 Vac 3 Verify that the correct power line fuse is installed The correct fuse is installed for your count...

Page 20: ...e Instructions and mounting hardware are included with each rack mounting kit To rack mount a single instrument order adapter kit 5063 9240 To rack mount two instruments side by side order lock link kit 5061 9694 and flange kit 5063 9212 Be sure to use the support rails inside the rack cabinet To install two instruments in a sliding support shelf order support shelf 5063 9255 and slide kit 1494 00...

Page 21: ... at a Glance 22 Rear Panel at a Glance 23 Display Annunciators 24 Description 25 Installation 27 Output Connections 29 This chapter provides general description of the instrument front panel overview rear panel overview display annunciators and installation guidelines for U8001A U8002A single output DC power supplies ...

Page 22: ...s and disables the over voltage protection function sets trip voltage and clears the over voltage condition 7 Over Current Enables and disables the over current protection function sets trip current and clears the over current condition 8 Display Limit Displays and sets the voltage and current limit values 9 Voltage Current Selects the knob control function for voltage and current adjustment 10 Ou...

Page 23: ...ects AC power line 2 Power fuse holder assembly Sets the line voltage to the proper values for different country based 3 Power line module Combination of the AC inlet and power fuse holder assembly 4 Physical lock mechanism Enables physical lock mechanism 5 Line Voltage Fuse Rating indicator Indicates the line voltage and line fuse rating ...

Page 24: ...ction is enabled when the annunciator turns on or the over voltage protection circuit has caused the power supply to shutdown when the annunciator blinks OCP The over current protection function is enabled when the annunciator turns on or the over current protection circuit has caused the power supply to shutdown when the annunciator blinks LOCK The front panel operation is disabled LIMIT The disp...

Page 25: ...lude Single output Constant voltage CV or constant current CC operation Over voltage protection OVP and Over current protection OCP Three storage locations M1 to M3 for user defined operating states Keypad lock capability Physical lock mechanism The front panel operation permits Easy to use control features Enabling or disabling OVP and OCP Setting the OVP and OCP trip levels Clearing OVP and OCP ...

Page 26: ...ut voltage and current meter mode Or displaying the limit values of voltage and current limit mode Checking the operating status from the annunciators Front panel binding posts are available to connect load wires for bench operation WARNING Floating the power supply output more than 240 Vdc from the chassis presents an electric shock hazard to the operator ...

Page 27: ...rned to Keysight Technologies in the future If you return the power supply for service attach a tag identifying the owner and model number Also include a brief description of the problem Mechanical check This check confirms that there are no broken terminals or knob and that the cabinet and panel surfaces are free of dents and scratches Verify that the display is not scratched or cracked Electrica...

Page 28: ...C to 55 C A fan cools the power supply by drawing air through the sides and exhausting it out the back Using a Keysight rack mount will not impede the flow of air Bench operation Your power supply must be installed in a location that allows sufficient space at the sides and rear of the power supply for adequate air circulation Cleaning No cleaning is required for this product If you wish to remove...

Page 29: ...ry the maximum short circuit current without overheating excessive voltage drops will not be a problem The voltage drops across the load wires should be limited to less than 2 V Refer to the American Wire Gauge AWG standard to calculate the voltage drop for some commonly used AWG wire copper WARNING Before attempting to connect wires to the front output terminals make sure to turn off the power su...

Page 30: ...2 General Information 30 Keysight U8001A U8002A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 31: ...tion 38 Programming Over Current Protection 41 Keylock Operation 43 Backlight Operation 44 System Related Operations 45 Extending the Voltage and Current Range 46 You have now learned how to install the power supply You were also briefly introduced to the front panel keys and their functionality from previous chapter This chapter shows you the operations and features for the U8001A U8002A single o...

Page 32: ...utput is disabled by default The OFF annunciator turns on The display shows OFF 2 Set the display to the limit mode Press on the Display Limit button in order to turn on the LIMIT annunciator The display will show the voltage and current limit values 3 Adjust for the desired output voltage Press on the Voltage Current button When seeing the voltage value V blinks turn the knob to adjust for the de...

Page 33: ... mode Press on the Display Limit button to return to the meter mode The LIMIT annunciator will be turned off 6 Enable the output Press on the Output On Off button to enable the output The OFF annunciator turns off and CV annunciator turns on The display is now in meter mode NOTE Verify that the power supply is in constant voltage mode Ensure that the constant voltage CV annunciator is on If the co...

Page 34: ...all segments and shows the firmware version briefly after that The output is disabled by default The OFF annunciator turns on 3 Set the display to the limit mode Press on the Display Limit button in order to turn on the LIMIT annunciator The display will show the voltage and current limit values 4 Adjust for the desired voltage limit Press on the Voltage Current button When seeing the voltage valu...

Page 35: ...ress on the Display Limit button to return to the meter mode The LIMIT annunciator will be turned off 7 Enable the output Press on the Output On Off button to enable the output The OFF annunciator turns off and constant current CC annunciator turns on The display is now in meter mode NOTE Verify that the power supply is in constant current mode Ensure that the constant current CC annunciator is on...

Page 36: ...g steps show you how to store and recall an operating state Storing Operating State 1 Press on the Memory button The M1 annunciator will blink 2 Turn the knob to choose the memory location for storing the operation state The M1 M2 and M3 annunciators will blink in a round robin manner 3 Press on the Memory button again to save the operating state in the chosen memory Display will show donE The M1 ...

Page 37: ... display shows the settings saved in M1 memory location 2 Turn the knob to show the settings saved in M1 M2 and M3 memory locations The M1 M2 and M3 annunciators will be turned on in round robin manner 3 Press on the Memory button if you want to use the shown settings as the current operating settings The M1 M2 and M3 annunciators will be turned off NOTE To cancel the operation allow the unit to i...

Page 38: ...el and how to clear the over voltage condition To set the OVP trip level and enable OVP 1 Press on the Over Voltage button The LIMIT annunciator will be turned off The OVP annunciator will fast blink continuously The display will show the OVP value and the character V will fast blink continuously 2 Turn the knob to adjust the OVP value 3 Press on the Over Voltage button again to end the adjustment...

Page 39: ... will fast blink continuously The display will show TRIP 2 To clear the OVP trip conditon press on the Over Voltage button again NOTE If OVP trip persists decrease the voltage limit settings to clear the tripping NOTE The power supply s OVP circuit contains a crowbar SCR which effectively shorts the output of the power supply whenever the overvoltage condition occurs If an external voltage source ...

Page 40: ...3 Operations and Features 40 Keysight U8001A U8002A User s and Service Guide Figure 3 1 Recommended protection circuit for battery charging ...

Page 41: ...el and how to clear the over voltage condition To set the OCP trip level and enable OCP 1 Press on the Over Current button The LIMIT annunciator will be turned off The OCP annunciator will fast blink continuously The display will show the OCP value and the character A will fast blink continuously 2 Turn the knob to adjust the OCP value 3 Press on the Over Current button again to end the adjustment...

Page 42: ...occur when the output is enabled When the OCP condition occurs The output is disabled and the OFF annunciator will be turned on If the keylock feature was enabled it will be disabled The LOCK annuciator will be turned off The OCP annunciator will fast blink continuously The display will show TRIP 2 To clear the OCP trip conditon press on the Over Current button again NOTE If OCP trip persists decr...

Page 43: ...by default when power up To enable keylock 1 Press on the Lock Unlock button The LOCK annunciator will be turned on 2 When the keylock function is enabled the knob and all the buttons are disabled EXCEPT Lock Unlock button To disable keylock 1 Press and hold down the Lock Unlock button for three seconds 2 When the Lock Unlock button is being held down the display will show HOLD until the keylock i...

Page 44: ...n This operation provides the backlight for the LCD display The backlight will be enabled by default when power up To turn on the backlight 1 Press on the Back Light button The backlight will be turned on To turn off the backlight 1 Press on the Back Light button The backlight will be turned off ...

Page 45: ...mory storage locations are cleared The voltage and current limit values are set to zero The calibration values are intact Power on self test A power on self test occurs automatically when the power supply unit is turned on This test ensures the unit is operational The power on self test checks for flash data memory and checks the voltage and current outputs when the unit is off NOTE If the test fa...

Page 46: ...tion is used the output voltage is the sum of output voltage across all power supplies while the output current is the output current from an individual power supply Each power supply must be adjusted to obtain the total output voltage Parallel connection Two or more power supplies which are capable of constant voltage or constant current automatic cross over operation can be connected in parallel...

Page 47: ...lies User s and Service Guide 47 4 Specifications and Characteristics For the Specifications and Characteristics of the U8001A U8002A Single Output DC Power Supplies refer to the datasheet at http literature cdn keysight com litweb pdf 5989 7182EN pdf ...

Page 48: ...4 Specifications and Characteristics 48 Keysight U8001A U8002A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 49: ...chapter contains service information for the U8001A U8002A single output DC power supplies including warranty information general diassemble verification steps to troubleshoot the connectivity and functionality detailed calibration procedures for your power supply related documentation and Keysight contacts It is advised that you perform the calibration test before you start using the power supply...

Page 50: ... warranty After your warranty expires Keysight offers repair by unit exchange service at competitive prices Extended service contracts Many Keysight products are available with optional service contracts that extend the covered period after the standard warranty expires If you have such a service contract and your instrument fails during the covered period Keysight Technologies will replace it in ...

Page 51: ...arton with appropriate packaging material for shipping 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 additional damage to your unit Keysight suggests that you...

Page 52: ...able parts from Keysight using the Keysight part number Note that not all parts listed in this chapter 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 by the Keysight part number shown in the replaceable parts list 3 Provide the instrument model number and serial n...

Page 53: ...e sure that the instrument is accurately calibrated Unit is inoperative Verify that the AC power cord is connected to the power supply Verify that the front panel power switch is at ON position Verify the power line voltage setting Verify that the power line fuse is installed Model Part number Part description U8001A 2110 0014 2110 0006 Fuse 4 0 A T for 100 Vac and 115 Vac Fuse 2 0 A T for 230 Vac...

Page 54: ... WARNING Shock Hazard Operating personnel must not remove power supply covers Component replacement and internal adjustment must be made only by qualified service personnel 1 Remove the power cord and slide the fuse cover upwards 2 Pull the fuse plunger to remove the fuse from the fuse holder 3 Remove the voltage selector PCB using a flat blade screwdriver 4 Replace the correct fuse and orientate ...

Page 55: ...on of the voltage selector AC inlet Figure 5 1 Orientation of voltage selector AC inlet in different voltage selection 100 indication needs to be in this orientation 115 indication needs to be in this orientation 230 indication needs to be in this orientation 115 V 230 V 100 V ...

Page 56: ...ing properly Unit fails self test Verify that the correct power line voltage setting is selected Also ensure that all terminal connections are removed while the self test is performed Please refer to Appendix A List of Error Codes for list of error codes Line Voltage Fuse Rating indicator for U8001A Line Voltage Fuse Rating indicator for U8002A NOTE The authorised personnel will mark the fuse rati...

Page 57: ...cal Keysight Service Center for a low cost recalibration Calibration interval One year interval is recommended for most applications Accuracy specifications are warranted only if calibration is made at regular calibration interval Accuracy specifications are not warranted beyond the one year calibration interval Keysight does not recommend extending calibration intervals beyond two years for any a...

Page 58: ... Infiniium equivalent Displays transient response Displays ripple and noise waveform PV Differential Amplifier Bandwidth 20 MHz bandwidth limit 20 MHz AC coupling Amplifier x10 LeCroy DA1855A Signal conditioning preamplifiers PV RMS Volt Meter 20 Hz to 20 MHz R S URE3 Measures RMS noise PV 50 Ω Feed through Termination Pomona Loads termination to match output impedance of the differential amplifie...

Page 59: ...e hour warm up period by power on the power supply During warm up period set the power supply to maximum programmable voltage and current Then enable the output Keep the test setup connection cables as short as possible Resistive Load RL 10 Ω 90 W for U8001A 6 Ω 150 W for U8002A Measures ripple and noise PV Current Monitoring Resistor Shunt RM 0 01 Ω 0 1 TCR less than 20 ppm ºC ISOTEK Co Model A H...

Page 60: ...002A User s and Service Guide Measurement techniques Test setup Most tests are performed at the front terminals as shown below Measure the DC voltage directly at the positive and negative terminals on the front panel Figure 5 2 Test setups ...

Page 61: ...est results when measuring load regulation peak to peak voltage and transient response time of the power supply measuring devices must be connected through the hole in the neck of the binding post at A while the load resistor is plugged into the front of the output terminals at B A measurement made across the load includes the impedance of the leads to the load The impedance of the load leads can ...

Page 62: ...An electronic load if available can be used in place of a variable load resistor and switches The electronic load is considerably easier to use than load resistors It eliminates the need for connecting resistors or rheostats in parallel to handle power it is much more stable than carbon pile load and it makes easy work of switching between load conditions as is required for the load regulation and...

Page 63: ...utput of the power supply to settle Make sure that the power supply is in CV mode 6 Record the voltage reading on the DMM VDMM This value should be within the limit of 0 V 20 mV 7 When the power supply is in meter mode record the voltage reading displayed on the front display of the power supply This value should be within the limit of VDMM 20 mV 8 Disable the output 9 When the power supply is in ...

Page 64: ...program the output voltage to full rated value i e 30 V and output current to the maximum programmable value 4 Enable the output 5 Operate the electronic load in constant current mode and set its current to 3 A for U8001A and 5 A for U8002A Ensure that the power supply is in CV mode If not adjust the electronic load so that the current drops slightly until the power supply is in CV mode 6 Record t...

Page 65: ...ltage to full rated value i e 30 V and output current to the maximum programmable value 5 Enable the output 6 Operate the electronic load in constant current mode and set its current to 3 A for U8001A and 5 A for U8002A Ensure that the power supply is in CV mode If not adjust the electronic load so that the output current drops slightly until the power supply is in CV mode 7 Adjust the AC voltage ...

Page 66: ... not adjust the resistive load so that the output current drops slightly until the power supply is in CV mode 6 Configure the differential amplifier as follow Set to AC mode positive and negative to removes the DC component Set to differential mode Set gain to x10 Set attenuation to 1 Set low pass filter to 20 MHz bandwidth limit to filter out input signal which contains higher frequency Set to ze...

Page 67: ... get the CV peak to peak noise measurement The result should not exceed 12 mVpp 10 Configure the RMS voltmeter as below Set high pass filter to 10 Hz AC coupling 11 Disconnect the oscilloscope and connect an RMS voltmeter in its place Do not disconnect the 50 Ω termination Divide the reading of the RMS voltmeter by 10 The result should not exceed the RMS limits of 1 mVRMS ...

Page 68: ...n the power supply 3 When the display is in the limit mode program the output voltage to full rated value i e 30 V and output current to the maximum programmable value 4 Enable the output 5 Set the electronic load to transient operation mode between one half of the output s full rated value and the output s full rated value at a 1 kHz rate with 50 duty cycle 6 Set the oscilloscope coupling interna...

Page 69: ...Service Guide 5 Keysight U8001A U8002A User s and Service Guide 69 Figure 5 4 Graph of load transient response ...

Page 70: ...mmable value and the current to 0 A 4 Enable the output 5 Wait for a few seconds for the output of the power supply to settle Make sure that the power supply is in CC mode 6 Divide the voltage drop DMM reading across the current monitoring resistor RM by its resistance to convert to amps and record this value IO This value should be within the limit of 0 A 20 mA 7 When the power supply is in meter...

Page 71: ...or RM by its resistance to convert to amps and record this value IO This value should be within the limit of U8001A 3 A 30 5 mA U8002A 5 A 37 5 mA 13 When the power supply is in meter mode record the current reading displayed on the front display of the power supply This value should be within the limit of U8001A IO 30 5 mA U8002A IO 37 5 mA ...

Page 72: ... to full rated value i e 3 A for U8001A and 5A for U8002A 4 Enable the output 5 Operate the electronic load in constant voltage mode and set its voltage to 30 V Ensure that the power supply is in CC mode If not adjust the electronic load so that the voltage drops slightly until the power supply is in CC mode 6 Record the current reading by dividing the voltage reading on the DMM by the resistance ...

Page 73: ... U8001A and 5 A for U8002A 5 Enable the output 6 Operate the electronic load in constant voltage mode and set its voltage to 30 V Ensure that the power supply is in CC mode If not adjust the electronic load so that the output voltage drops slightly until the power supply is in CC mode 7 Adjust the AC voltage source to low line voltage limit Record the output current reading by dividing the voltage...

Page 74: ...U8002A 4 Enable the output 5 Make sure that the power supply is in CC mode If not adjust the resistive load so that the output voltage drops slightly until the power supply is in CC mode 6 Configure the differential amplifier as follow Set to AC mode positive and negative to removes the DC component Set to differential mode Set gain to x10 Set attenuation to 1 Set low pass filter to 20 MHz bandwid...

Page 75: ...ration will start with voltage calibration mode Display will show C blinking The CV annunciator will be turned on Ensure that the power supply is in CV mode Otherwise the CC annunciator will fast blink 2 Low voltage calibration point Display will show C blinking The M1 annunciator will be turned on Use the knob to enter the reading obtained from the DVM Press the Memory button to save the changes ...

Page 76: ...d from the DVM Press the Memory button to save the changes voltage calibration is done You will be able to perform this if the power supply is in CV mode 5 Voltage calibration Display will show donE for a few seconds and the power supply will enter the current calibration mode NOTE If you do not wish to continue with the current calibration you may now turn off the power supply to exit the calibra...

Page 77: ... the power supply is in constant current CC mode along the current calibration 1 Current calibration mode Display will show C blinking The CC annunciator will be turned on Ensure that the power supply is in CC mode Otherwise the CV annunciator will fast blink 2 Low current calibration point Display will show C blinking The M1 annunciator will be turned on Use the knob to enter the computed value D...

Page 78: ...the computed value DVM reading divided by shunt resistance Press the Memory button to save the changes and the whole calibration process is done You will be able to perform this if the power supply is in CC mode 5 Calibration done Display will show donE CAL The output is disabled and the OFF annunciator will be turned on 6 Reenter calibration mode Press the Memory button to reenter the calibration...

Page 79: ...Keysight U8001A U8002A Single Output DC Power Supplies User s and Service Guide 79 Appendix Appendix A List of Error Codes 80 ...

Page 80: ...eration errors Calibration errors Codes Descriptions 101 Flash read write failed 102 Invalid calibration data 111 Temperature too high Codes Descriptions 201 Flash read write failed 211 Calibration failed for DAC CV 212 Calibration failed for DAC CC 213 Calibration failed for ADC CV 214 Calibration failed for ADC CC 215 Calibration failed for DAC OV 216 Calibration failed for DAC OC ...

Page 81: ...his information is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2008 2017 Edition 8 September 2 2017 Printed in Malaysia U8001 90001 ...

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