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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See terms – opens in a new window or tab. Fill in your details below or click an icon to log in: This meter was also first in HP system-level flagship line to feature integrated measurements for both direct and alternating current and alternating voltage frequency and period. Resistance shunts for current measurement function. Ph may be offered for reduced service levels. Remaining two LED s had current limited by inline resistor, insulated and hidden by thermal-shrink tube.
What is your favorite multimeter display hack? Unable to Process Request Your offer was received but we are unable to process it for the following reason: Weak contacts should be tighten carefully, but not too much.
Modifications for A input amplifier. Thank you for the straightforward and beautiful hack, [xi]. Urge to attach something generating light to aid readout visibility is very hard to resist.
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: One solution to this that we have seen before is a hack where someone decided to add a backlight onto their cheap multimeter. Pair Q and operation of this stage usually higher working current produce less 3457z.
With the aid of an ATmega32, the digits were decoded throughout the transmission frames. How did that happened? Table below present measured data after calibration adjustment and performance verification.
It would be interesting to see if the changes in power consumption, heat, or electrical noise changed the calibration. Please correct the issue indicated and resubmit or contact us via email or toll free at and we will be happy to assist you with this request.
Unable to Process Offer Your offer was received but we are unable to process it for the following reason: Check the table below with uncertainty calculations. Yes No Are you willing to prepay your order by check or wire transfer to avoid credit card fees?
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:. Connection should not break if you just apply some force to the cable, big enough to lift the meter edge from the table. External parts easy to get damaged Can cause unexpected short circuits, or ESD issues running meter in winter with people wearing charged sweaters.
3457A Digital Multimeter
Item description HP – A. RMS deviation was calculated, in ppm scale from the average.
This smooth build achieved an 80 Hz refresh rate that was faster than the original due to the increased speed of the CPU. Subject to credit approval. Using the multiplexer assemblies with enable up to ten signal channels to be scanned either sequentially or randomly.
Agilent / HP A for sale $ | | AccuSource Electronics
The present dmm 345a can be stored in the non-volatile state memory for convenient reconfiguration of the dmm. System Features Keeping with HP’s long tradition of systems oriented digital multimeters, the A has all the systems features 3457 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.
Vos adjustment trimmer access port in shield cover. In-Stock Notification Request Sent Your request to be notified when this product is back in stock has been sent to our sales department.
Replacement foil resistors S After Q replacement with faster curve than original hpp U more gain input amplifier circuitry started 347a oscillate with frequency around 3457q. Connect mains power cable back to meter, turn it on and leave it to warm-up for at least an hour. Contact the seller – opens in a new window or tab and request a shipping method to your location. 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.
Display hacks are always nice. Disconnect everything from the meter, including mains, GPIB and input cables. Interest will be charged to your account from the purchase date if the balance is not paid in full within 6 months.
A Digital Multimeter [Obsolete] | Keysight (formerly Agilent’s Electronic Measurement)
Replaced opamps with collet sockets. On the bench, the front panel operation is extremely flexible and comprehensive. This is 48 hours of running time, to ensure that short-term stability of the meter is taken into account.
And calibration of that meter is very expensive, to let such mistakes pass by. To scale input signal amplitude input amplifier is always engaged, but has 3457z gain coefficient. Note, that on low voltage ranges 0. HP A input frontend and signal conditioning schematics. Carefully lift rear side of the shield, disconnect cable from rear terminal and turn screen 34577a.