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XDEVS.COM | TWEAKS AND MODS FOR HP 3457A 6.5-DIGIT DMMSEE MORE ONXDEVS.COM
XDEVS.COM | HOW-TO WELD OWN THERMAL K PROBE USING COMMON Next step – prepare power cabling. I’ve just used 8pin CPU cable via male receptacle with two copper AWG6 wires. One will hold our thermocouple struck, another will be connected via metal clamp to brush. Next step – turn both wires together, to have it nicelyfixed.
XDEVS.COM | REPAIR AND PC HW UGRADES FOR TDS5000B SERIES SCOPE Browse to WINNT\System32\config folder on the secondary drive from scope. Open the system file. When asked for a name, give it the name aaaa (this is important, since it must match the file you downloaded on next step) Get a registry file with keys. Close the registry editorfor now.
XDEVS.COM | HP 3456A DIGITAL VOLTMETER RESTORATIONWHAT IS THIS ABOUTDISCLAIMERINTRODUCTIONFIRST LOOKSEE MORE ON XDEVS.COM XDEVS.COM | WAVETEK/DATRON 4808 MULTIFUNCTION CALIBRATOR The Wavetek/Datron 4800 series MFC are designed to adjust, test and provide calibratiton for general purpose instruments, such as DMM s. MFC itself supported by the Wavetek/Datron 4950 Multifunction Transfer Standard. Possible Options of 4800 series: Option code. Function. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATIONINTRODISCLAIMERMANUAL REFERENCESPARTS DONOR METER TEARDOWNSEE MORE ON XDEVS.COM XDEVS.COM | HP 34401A REPAIR AND CALIBRATION WORKLOGINTRODISCLAIMERMANUALS REFERENCESINITIAL INSPECTIONSEE MORE ONXDEVS.COM
XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | ANOTHER HP 3458A REPAIR AND DALLAS NVRAMSEE MORE ONXDEVS.COM
XDEVS.COMDEVELOPMENTDOCSABOUT USNEWSARTICLESGUIDES xDevs.com is dedicated to sharing electronics engineering, digital and analog circuit design, metrology, and calibration study, PCB layout, FPGA applications and firmware development for embedded systems and devices. All data presented here is free for grabs and use, withoutany warranties.
XDEVS.COM | TWEAKS AND MODS FOR HP 3457A 6.5-DIGIT DMMSEE MORE ONXDEVS.COM
XDEVS.COM | HOW-TO WELD OWN THERMAL K PROBE USING COMMON Next step – prepare power cabling. I’ve just used 8pin CPU cable via male receptacle with two copper AWG6 wires. One will hold our thermocouple struck, another will be connected via metal clamp to brush. Next step – turn both wires together, to have it nicelyfixed.
XDEVS.COM | REPAIR AND PC HW UGRADES FOR TDS5000B SERIES SCOPE Browse to WINNT\System32\config folder on the secondary drive from scope. Open the system file. When asked for a name, give it the name aaaa (this is important, since it must match the file you downloaded on next step) Get a registry file with keys. Close the registry editorfor now.
XDEVS.COM | HP 3456A DIGITAL VOLTMETER RESTORATIONWHAT IS THIS ABOUTDISCLAIMERINTRODUCTIONFIRST LOOKSEE MORE ON XDEVS.COM XDEVS.COM | WAVETEK/DATRON 4808 MULTIFUNCTION CALIBRATOR The Wavetek/Datron 4800 series MFC are designed to adjust, test and provide calibratiton for general purpose instruments, such as DMM s. MFC itself supported by the Wavetek/Datron 4950 Multifunction Transfer Standard. Possible Options of 4800 series: Option code. Function. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATIONINTRODISCLAIMERMANUAL REFERENCESPARTS DONOR METER TEARDOWNSEE MORE ON XDEVS.COM XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | HP 34401A REPAIR AND CALIBRATION WORKLOGINTRODISCLAIMERMANUALS REFERENCESINITIAL INSPECTIONSEE MORE ONXDEVS.COM
XDEVS.COM | ANOTHER HP 3458A REPAIR AND DALLAS NVRAMSEE MORE ONXDEVS.COM
XDEVS.COM | SERVICES Volt XFER, MM A9 2nd temperature ramp – Final check on temperature ramp 23.4->50->23.4 C. Volt XFER, Time 9823 10V output, open – Initial check on 10V output of Time9823, 20V Range, BNC cable long. Volt ZFER, MM A9 3rd retest – Third check on A9 in May. Metal LTZ test – Powered by +15.0000V from Time9823, ambient AC. XDEVS.COM | ARTICLES André Bülau. Introduction to solid-state reference REFAMP design, using Motorola SZA263 or FLUKE/Linear LTFLU. Calibration methods and reports for xDevs.com's 10V DC reference, built into modified Fluke 792 Power Pack chassis. Repair worklog of the Fluke 8505A, precision 6½-digit benchtop multimeter from year 1982. XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | NIKKOR AF-S 28-70/2.8 LENS REPAIR This 935g lens is not produced anymore, being replaced by newer AF-S 24-70/2.8G in 2007, which in turn already upgraded to AF-S 24-70/2.8E VR. All these full-frame lenses are fixed wide f/2.8 aperture at all focal distance ranges, have fast auto-focus and good sharpness. My particular 28-70/2.8 was acquired from eBay as used, and was servingme
XDEVS.COM | EVGA RTX 2080 TI KINGPIN EDITION TECHNICAL GUIDE Since GDDR6 memory is now provided by multiple manufacturers, with RTX 2080 Ti KINGPIN EVGA is going back to traditional Samsung K4Z80325BC-HC14 memory chips, in standard 11 GByte configuration. These chips are rated for 14.0 Gb/s data rate and designed for 0-85 °C temperature range running at nominal 1.35 V DDQ ±3%. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATION In this short article benchtop multimeter from Fluke, Model 8842A will be repaired, calibrated and tested. This is old but still nice and easy to use lab workhorse. It may not have fancy touchscreen TFT display, or Linux-based OS with megabytes of storage, but it is fast, powers on instantly and holds the accuracy well. XDEVS.COM | AD584KH-BASED DC VOLTAGE REFERENCE REVIEW AND TEST Contents. Intro; Exterior; Analysis; Performance test; Tweaks and calibration; Conclusion; Intro. Friend of mine wanted to have ability to calibrate his portable 3½-digit and 4½-digit DMM s, without spending too much money. So reference units, such as voltagestandard.com Pentaref are out of question, due to their cost. Also using ovenized reference circuits, such as LM399 or LTZ1000 would XDEVS.COM | REPAIR AND TWEAKS FOR FLUKE 845AB NULL-METER This is particularly useful for high-voltage high-resistance bridges and such. For this and few other reasons, we got Fluke Model 845AB null-meter for $250 USD. Let’s see what makes it work. 0-1 volt, one side at chassis ground; to 0.5% of end scale. Output can XDEVS.COM | VHP202ZT IN G9330 10K Test of HP A9 (ORANGE) over 2002, and VHP202ZT 10K in G9330 over 3458A@NPLC100 OHMF NPLC100, DELAY 5, OCOMP ON, AZER ON 7.1845976VDC on HP-MM-REF Baseline 0ppm - +28.5C, 9999.862146 TC BOX is 1.06 ppm/K XDEVS.COM | HP 3458A 8.5-DIGIT METROLOGY-GRADE DMM RESTORATION Table 4: A5 PCB versions. I happen to have oldest A5 PCB, but with community help we can take a look on more recent revisions of A5 PCBA used in 3458A’s.. Dr.Frank, well-known enthusiast shared nice hi-res photo of year 2000 A5 PCBA:. As it’s visible from the photo, six firmware ROM chips got replaced with larger ST M27C4002, holding single binary image. XDEVS.COMDEVELOPMENTDOCSABOUT USNEWSARTICLESGUIDES xDevs.com is dedicated to sharing electronics engineering, digital and analog circuit design, metrology, and calibration study, PCB layout, FPGA applications and firmware development for embedded systems and devices. All data presented here is free for grabs and use, withoutany warranties.
XDEVS.COM | TWEAKS AND MODS FOR HP 3457A 6.5-DIGIT DMMSEE MORE ONXDEVS.COM
XDEVS.COM | HOW-TO WELD OWN THERMAL K PROBE USING COMMON Next step – prepare power cabling. I’ve just used 8pin CPU cable via male receptacle with two copper AWG6 wires. One will hold our thermocouple struck, another will be connected via metal clamp to brush. Next step – turn both wires together, to have it nicelyfixed.
XDEVS.COM | REPAIR AND PC HW UGRADES FOR TDS5000B SERIES SCOPE Browse to WINNT\System32\config folder on the secondary drive from scope. Open the system file. When asked for a name, give it the name aaaa (this is important, since it must match the file you downloaded on next step) Get a registry file with keys. Close the registry editorfor now.
XDEVS.COM | HP 3456A DIGITAL VOLTMETER RESTORATIONWHAT IS THIS ABOUTDISCLAIMERINTRODUCTIONFIRST LOOKSEE MORE ON XDEVS.COM XDEVS.COM | WAVETEK/DATRON 4808 MULTIFUNCTION CALIBRATOR The Wavetek/Datron 4800 series MFC are designed to adjust, test and provide calibratiton for general purpose instruments, such as DMM s. MFC itself supported by the Wavetek/Datron 4950 Multifunction Transfer Standard. Possible Options of 4800 series: Option code. Function. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATIONINTRODISCLAIMERMANUAL REFERENCESPARTS DONOR METER TEARDOWNSEE MORE ON XDEVS.COM XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | HP 34401A REPAIR AND CALIBRATION WORKLOGINTRODISCLAIMERMANUALS REFERENCESINITIAL INSPECTIONSEE MORE ONXDEVS.COM
XDEVS.COM | ANOTHER HP 3458A REPAIR AND DALLAS NVRAMSEE MORE ONXDEVS.COM
XDEVS.COMDEVELOPMENTDOCSABOUT USNEWSARTICLESGUIDES xDevs.com is dedicated to sharing electronics engineering, digital and analog circuit design, metrology, and calibration study, PCB layout, FPGA applications and firmware development for embedded systems and devices. All data presented here is free for grabs and use, withoutany warranties.
XDEVS.COM | TWEAKS AND MODS FOR HP 3457A 6.5-DIGIT DMMSEE MORE ONXDEVS.COM
XDEVS.COM | HOW-TO WELD OWN THERMAL K PROBE USING COMMON Next step – prepare power cabling. I’ve just used 8pin CPU cable via male receptacle with two copper AWG6 wires. One will hold our thermocouple struck, another will be connected via metal clamp to brush. Next step – turn both wires together, to have it nicelyfixed.
XDEVS.COM | REPAIR AND PC HW UGRADES FOR TDS5000B SERIES SCOPE Browse to WINNT\System32\config folder on the secondary drive from scope. Open the system file. When asked for a name, give it the name aaaa (this is important, since it must match the file you downloaded on next step) Get a registry file with keys. Close the registry editorfor now.
XDEVS.COM | HP 3456A DIGITAL VOLTMETER RESTORATIONWHAT IS THIS ABOUTDISCLAIMERINTRODUCTIONFIRST LOOKSEE MORE ON XDEVS.COM XDEVS.COM | WAVETEK/DATRON 4808 MULTIFUNCTION CALIBRATOR The Wavetek/Datron 4800 series MFC are designed to adjust, test and provide calibratiton for general purpose instruments, such as DMM s. MFC itself supported by the Wavetek/Datron 4950 Multifunction Transfer Standard. Possible Options of 4800 series: Option code. Function. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATIONINTRODISCLAIMERMANUAL REFERENCESPARTS DONOR METER TEARDOWNSEE MORE ON XDEVS.COM XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | HP 34401A REPAIR AND CALIBRATION WORKLOGINTRODISCLAIMERMANUALS REFERENCESINITIAL INSPECTIONSEE MORE ONXDEVS.COM
XDEVS.COM | ANOTHER HP 3458A REPAIR AND DALLAS NVRAMSEE MORE ONXDEVS.COM
XDEVS.COM | SERVICES Volt XFER, MM A9 2nd temperature ramp – Final check on temperature ramp 23.4->50->23.4 C. Volt XFER, Time 9823 10V output, open – Initial check on 10V output of Time9823, 20V Range, BNC cable long. Volt ZFER, MM A9 3rd retest – Third check on A9 in May. Metal LTZ test – Powered by +15.0000V from Time9823, ambient AC. XDEVS.COM | ARTICLES André Bülau. Introduction to solid-state reference REFAMP design, using Motorola SZA263 or FLUKE/Linear LTFLU. Calibration methods and reports for xDevs.com's 10V DC reference, built into modified Fluke 792 Power Pack chassis. Repair worklog of the Fluke 8505A, precision 6½-digit benchtop multimeter from year 1982. XDEVS.COM | HOW-TO: POWERING STAND-ALONE PCIE VIDEOCARD It’s often useful to have standalone power supply for power supply troubleshooting on various videocards. Using motheboard for thispurpose is
XDEVS.COM | NIKKOR AF-S 28-70/2.8 LENS REPAIR This 935g lens is not produced anymore, being replaced by newer AF-S 24-70/2.8G in 2007, which in turn already upgraded to AF-S 24-70/2.8E VR. All these full-frame lenses are fixed wide f/2.8 aperture at all focal distance ranges, have fast auto-focus and good sharpness. My particular 28-70/2.8 was acquired from eBay as used, and was servingme
XDEVS.COM | EVGA RTX 2080 TI KINGPIN EDITION TECHNICAL GUIDE Since GDDR6 memory is now provided by multiple manufacturers, with RTX 2080 Ti KINGPIN EVGA is going back to traditional Samsung K4Z80325BC-HC14 memory chips, in standard 11 GByte configuration. These chips are rated for 14.0 Gb/s data rate and designed for 0-85 °C temperature range running at nominal 1.35 V DDQ ±3%. XDEVS.COM | FLUKE 8842A REPAIR AND CALIBRATION In this short article benchtop multimeter from Fluke, Model 8842A will be repaired, calibrated and tested. This is old but still nice and easy to use lab workhorse. It may not have fancy touchscreen TFT display, or Linux-based OS with megabytes of storage, but it is fast, powers on instantly and holds the accuracy well. XDEVS.COM | AD584KH-BASED DC VOLTAGE REFERENCE REVIEW AND TEST Contents. Intro; Exterior; Analysis; Performance test; Tweaks and calibration; Conclusion; Intro. Friend of mine wanted to have ability to calibrate his portable 3½-digit and 4½-digit DMM s, without spending too much money. So reference units, such as voltagestandard.com Pentaref are out of question, due to their cost. Also using ovenized reference circuits, such as LM399 or LTZ1000 would XDEVS.COM | REPAIR AND TWEAKS FOR FLUKE 845AB NULL-METER This is particularly useful for high-voltage high-resistance bridges and such. For this and few other reasons, we got Fluke Model 845AB null-meter for $250 USD. Let’s see what makes it work. 0-1 volt, one side at chassis ground; to 0.5% of end scale. Output can XDEVS.COM | VHP202ZT IN G9330 10K Test of HP A9 (ORANGE) over 2002, and VHP202ZT 10K in G9330 over 3458A@NPLC100 OHMF NPLC100, DELAY 5, OCOMP ON, AZER ON 7.1845976VDC on HP-MM-REF Baseline 0ppm - +28.5C, 9999.862146 TC BOX is 1.06 ppm/K XDEVS.COM | HP 3458A 8.5-DIGIT METROLOGY-GRADE DMM RESTORATION Table 4: A5 PCB versions. I happen to have oldest A5 PCB, but with community help we can take a look on more recent revisions of A5 PCBA used in 3458A’s.. Dr.Frank, well-known enthusiast shared nice hi-res photo of year 2000 A5 PCBA:. As it’s visible from the photo, six firmware ROM chips got replaced with larger ST M27C4002, holding single binary image.* Development
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SOME KEY REVIEWS, WORKLOGS AND PRODUCT DESIGN ARTICLES * SI 2019 redefinition – Calibration work done with Taiwan ITRI CMS National Metrology Lab * Study of temperature stability, more than 260 resistors – Methodology and test results of various commercial precision resistors * DMM noise measurement – public project to measure and compare noise of bench multimeters. * xDevs.com FX 10.0000V Ultra-stable Voltage reference – second iteration of LTZ1000A-based ultra-stable DC Voltage standard * xDevs.com KX Ultra-stable Voltage reference – public first generation of LTZ1000A 7V DC voltage standard * Fluke 5700A calibrator overhaul – Service and minor repairs for high-end Fluke 5700A series calibrator. * Fluke 792A AC/DC transfer standard repair – Repair of battery block and testing of Fluke 792A metrology AC/DC transferstandard.
* HP/Agilent/Keysight 3458A repair worklogs , Unit 2, Unit 3
– Detailed worklogs covering HP 3458A 8½-digit DMMs repair and upgrades * Wavetek 4920M AC standard repair – Repair and calibration of Wavetek 4920M AVMS. * Keysight B2987A electrometer teardown – Brief look on high-performanceelectrometer design
* Keithley 2001 repair – Extensive repair experience for Keithley Model 2001 7½-digit precision multimeters * Keithley 2002 repair – Extensive repair experience for Keithley Model 2002 8½-digit precision multimeter * Keithley 2510 repair – Repair and calibration of Keithley Model 2510 TEC SMU * Keithley 2400 repair – Repair of broken VFD glass and testing Keithley Model 2400 SourceMeter * Tektronix CSA7404 repair – Fixing dead NVRAM in Tektronix TDS7000/CSA7404 4GHz oscilloscope * HP 3245A Universal source repair – Repair and calibration of rare HP 3245 precision 6½-digit DC/AC signal source * Calibration procedure for Fluke 52-II – Step-by-step calibration for portable Fluke thermometer * Development boards – ATMEL AVR, ARM, Altera CPLD and FPGA development opensource hardwarekits
* Neutron – Power supply automated test system, 12-channel 2kW DC power rating for electronicload, 2% accuracy
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