HP 3457A PDF
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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Low ranges like 0.
3457A Digital Multimeter
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. Cost of maintenance on these meters is reachable even for hobby users to use a lab working tool.
Also each function and mode can be configured either from front panel or remotely over GPIB interface. Calibration procedure for balancing does not adjust anything, it just shorts input amplifier input and measure if the output voltage is in spec, higher or 33457a than spec. I really hope that he makes this into a kit. Many of inteface and overall design ideas in this meter are used as a base for later HP A monsters.
LT circuitry near DCV reference. Key importance at this stage to probe output with oscilloscope, to ensure stable operation without any oscillation, with actual DC 33457a applied on the input, from zero all the way to the full scale 3 V.
More than readings or whole measurement sequences can be stored in the A for convenient and fast measurement throughput. Powerful Measurement Management The A combines superb analog measuring capability with equally powerful measurement management. This is a private listing and your identity will not be disclosed to anyone except the seller.
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That is exactly what [xi] did. Since all microchips in HP Up are in thru-hole type DIP style, all replaced components are carefully desoldered and positions on the board populated with high-quality collet-type sockets. Reading the full details the hack is even more impressive. Any international shipping is paid in part to Pitney Bowes Inc. Actual amplifier part is Q, and Q help for constant voltage between source and drain of Q You should expect a response within one business 4357a or less.
Carefully lift rear side of the shield, disconnect cable from rear terminal and turn screen up. Resume making your offer 34577a, if the page does not update immediately. Under software control, the eight two-wire channels can be reconfigured to four 4-wire ohm channels.
Please provide the requested information to receive an estimated shipping cost. First I check if the adjustment necessary at all why to 3547a time on extra drift. R trimpot adjutment for offset correction.
This opamp provide most of the gain. Will arrange for local pickup only no shipping.
Agilent / HP A for sale $ | | AccuSource Electronics
Modifications worklog Some might think that HP A is ancient technology instrument, and it should be very easy just to swap some opamps and components to modern high-performance devices, and everything will become much better.
Resistance shunts for current measurement function. There is no service manual schematics for this module in A documents, but such schematics available in A. Description Included Accessories Available Options 6.
LEDs Give HP A DDM’s LCD Display the Boot | Hackaday
Experimentally, I figured out that there is indeed balance offset. Mouse move on Image to zoom. Minimum monthly payments are required. First rule of repair — do not change or fix things, that are still working fine.
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