Select autorange or manual ranging. Menu Command Keys. • Immediate access to eight common commands. • Shifted keys allow simple access to complete. No other specifications are affected. Refer to the HP A Operating, Programming, and. Configuration Manual for complete performance specifications;. Hp A Pdf User Manuals. View online or download Hp A Repair Manual , Technical Manual.

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A10 rear side of PCBA.

Please enter 5 or 9 numbers for the ZIP Code. An item that has been used previously. In many cases an old unit might have been retrofitted with newer firmware, so later firmware revision cannot be used as proof of the date of manufacture.

Not a photocopy or CD.

Hope it will stay that way during next days, to confirm ADC drift issue fix. There is a 2. Meter digital brain, firmware, calibration ROM and digital interface circuits are located on this dual-layer board. HP A side handle and rear panel. The delimiter used to separate parameters is “”. See other items More Other components like main input DC amplifier, ranging resistors and relays, physical PCB and wiring connections contribute larger errors into overall voltage temperature coefficient.

Delivery times may vary, especially during peak periods. Now press again; the display is returned to the measurement state. Cleaning rust of with 3M Scotch-Brite and alcohol. Black 2-pin connector at left of regulator is fan header.

Front panel board and keypad. HP A front and rear faces. For those who are not familiar with A, some very useful operation details and features are covered in this HP Journaldedicated for A release. With great help of abrasive 3M Scotch-brite and half a bottle of alcohol not drinking, like some might thought!


These procedures involve working with line mains voltage, so be careful and pay attention of what you doing, to avoid electric shock! Test chart with original high-temp A9. There are also special versions of A with options, such as: Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab.

Was it worth doing?

Learn More – opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc. It still should work at least for DC. Refer to eBay Return policy for more details.


Test chart with original low-temp A9 Chart 3: This have nothing to do with ADC issues, just another hidden fault, which is resolved now. If everything looks good, install adapter into meter. Lot manal time was spent on troubleshooting for a root cause, until main amplifier check was done, not limited just to dual JFET Q, but also to U opamp, using DC input signal as reference.

This board was missing, so I had to buy replacement from secondary market. If the item you receive is not as described or if you are not satisfied for any reason, please contact us immediately. One good thing about used references, they likely to be nicely aged. Manuao parts are available for order from Keysight. Covers after cleaning with alcohol and water bath.


Front panel board and keypad Image See terms – opens in a new window or tab. Learn more – opens in a new window or tab. Learn More – opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc.

Learn more – opens in a new window or tab. This amount is subject to change until you make payment. What could be wrong….

Module construction and prototype assembly Image Read more about the condition. Be careful with front panel assembly, as vacuum display glass is fragile. Secondary connector need rewiring as on photo above. Special financing available Select PayPal Credit at checkout to have the option to pay over time.

This is due aging process and residual stresses in silicon die. After meter repair and calibration, data stored in that chip will be critical.

HP 3458A Repair Manual

Ready to install on chassis. This seller is currently away until Jan 02, DCV Tempco measurement results As we can see, reduced oven temperature for A9 reference does not actually improve temperature coefficient of the DC voltage function of the meter.

The condition of the cover is good with light wear.

I was wondering and measured old caps too, for series capacitance and resistance, with help of repaired HP B Image It prohibited Packed of Indonesian advanced incomes from each such hp a manual pdf.