Hewlett-Packard HP3458A 8.5 Digit Multimeter - Cal. Standard | eBay
Repair worklog : Old rusty HP 3458A
Nuts About Volts | Hackaday
1989 , Volume , Issue Apr-1989
Ken Shirriff on X: "The HP 3458A (1988) is a super-accurate 8½-digit multimeter. There's an unusual hybrid current-steering chip at the heart of it that performs the high-resolution analog-to-digital conversion. I'm helping
Agilent / HP 3458A 8.5 Digit Benchtop Digital Multimeter, Refurbished
HP 3458A 八位半數位電錶- 阡鋒科技有限公司
3458A Digital Multimeter, 8.5 Digit | Keysight
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HP 3458A DIGITAL MULTIMETER 001 Calibration
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Handel – Gecom Technologies
xDevs.com | Repair log of reader's HP 3458A precision DMM