Various modifications and circuit improvements of HP A 6½-digit system DMM. This manual may contain references to HP or Hewlett-Packard. Please note that Hewlett-. Packard’s former test and measurement, semiconductor products and. HP – A. info tech (non contractuel). HP – Agilent – Keysight A Digital Multimeter HP Agilent A Multimeter, Calibrated with 30 day Warranty.
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Another time consuming challenge — complex approach type.
Agilent / HP 3457A
On an device that can read down to 7. HP A input amplifier after all modifications.
Data from specs for 24 hour and 90 day period was used. Now we have access to test holes, which marked as Vos Adj A2-R LED mount for display backlight.
HP – A AGILENT multimeter | eBay
There is possibility to save and recall multiple operation modes with all function settings, even after power cycle. I tried to combine modifications in groups, so can test multiple things at same time, when that was possible. In no event shall the author, xDevs. We would also greatly appreciate it if you could provide us with this error code: This is 48 hours of running time, to ensure that short-term stability of the meter is taken into account.
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The two current channels offer automatic make-before-break switching so that the path for current as high as 1. Thank you for allowing us the opportunity to assist with your test equipment needs. Worth to note, that this operational amplifier must be stable with both high and low gains, and as we will see later, most troublesome range for np is 3 V.
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Suspects are listed below:. Also as bonus HP promoted ability to get 7th digit from special register access. Resistance data as received, before any adjustment: See terms – opens in a new window or tab.
Special circuitry protects calibration data from unauthorized or random overwrite. The power consumption was a bit higher than the previous version, but this was to be expected with the exceptionally brighter display — and well worth it at that. We sincerely promise to do better next time. Urge to attach something generating light to aid readout visibility is very hard to resist. Low ranges like 0. System Features Keeping with HP’s long tradition of systems oriented digital multimeters, the A has all the systems features you’ve come to expect plus more to make interfacing to your computer even easier – features like flexible formatting of ASCII, 16 bit binary, or 32 bit binary data and buffer memory so that you can take measurements with the A at its highest speed.
All information posted here is hosted just for education purposes and provided AS IS. Using the high voltage assembly allows single channel measurement of either AC or DC voltages at the rear panel.
There are 1 items available. For 30 V and V additional Please enter a number less than or equal to 1. This item will be shipped through the Global Shipping Program and includes international tracking.
One kind person my kind regards presented me with thin copper foil with adhesive jp. Carefully insert isolated flat screwdriver to fit the pot port. Areas where A have worse spec marked in red color. After Q replacement the complete input amplifier balance had to be adjusted and re-calibrated. Capacitors used for stability compensation. Learn how your comment data is processed.
Please let us know which of these you would 34557a willing to consider for the price discount. Disclaimer Redistribution and use of this article or any images or files referenced in it, in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Note that A conversion from ADC is actually 7 digits, but least digit is averaged out and not reported to the front-end, nor the GPIB port remote controller. Make sure total height of the component in board is not taller then 12 mm, as there is AC module PCBA above the circuitry here.