Hp 3245a manual

It arrived in better physical condition than expected, but was way out of calibration. Having to calibrate the old way with a DMM and manual input of voltage makes one appreciate the value-added in the A calibration method. After my usual internal inspection and dust removal no IPA this time the was ready for warm-up and calibration. The end result is that my A has passed all the 'tests' and is in line with all the performance measures.

One troublsome spot--perhaps due to the state of earlier cals there had been 14 --there was a glitch related to Step My first time the 'voltage' indicated -. What a PITA: I can go for coffee while the chugs along on the volts cal Without wasting too much time on precision, I started another cal and used the 'book value' for Step It worked, but not as well as possible.

My next cal was done with care on volts only and I recorded the entries on paper. I used. It did; much better. Both meters were reading the same voltage from the and the was set on 'High Z' so as not to load things down. Each run of the histograms captured over obs and sometime several times that. By observation, each histogram was checked for skewness, kurtosis and bi-modality and restarted if needed.

With a stable and reliable histogram, the consistency of mean and standard deviation were used to indicate the end of the run. This was usually close to the value displayed on the , but when different, the 'mean' was used.

Current calibration was done with the alone using the same process as above. The 'histogram' method improved a bit on the 'straight from ' as suggested in the cal manual. Performance results that were near the edge of the range were now close to the center in all cases. The following users thanked this post: Zucca. There doesn't seem to be any way to calibrate, so I assume there is a crystal oscillator running the show.

The A shows the same. On the o'scope there seems to be an occasional glitch maybe from a higher frequency. Not a big deal, but if anyone has more info. Probably well within the specs for an instrument of that age. Screen Shot at Samogon Frequent Contributor Posts: Country:. Are you accepting new members?

Measured P2 connector pins 1 and 2 give 17VAC as i understand transformer output too high. Line set to VAC. And what i suppose to think? This unregulated 21V goes to backplane A2 and there distributed to source A1. What do you think? BTW i have supplied 15V to A2 from lab supply and it did not fix an error. So i assume A1 is damaged. Isolated voltages on A1 generated by separate switching supply, so higher input voltage does not matter much I think. Check BP error signal generation circuitry on backplane.

Ok removed both source cards and here we are BBQ Installed only CH1 card and we are alive, no errors, selftest passed. In no event shall the author, xDevs.

All sticker residues are cleaned off, panel look almost like new now. Learn More — opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc.

Contact the seller — opens in a bp window or tab and request a shipping method to your location. High voltage generated by push-pull DC-DC supply and rectified by diodes. They have hundreds of greatly remastered manuals, so be sure to check their repository for other goodies. Learn More — opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc.

Read more about the condition. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. All information posted here is hosted just for education purposes and provided AS IS. See terms — opens in a new window or tab. I did notice these universal sources before, but their rather limited output voltage range did not interest me much.

Other offers may also be available. Pleasant looks and feel during operation guaranteed. As usual, we have project tracker, dedicated for A repair so any one can track the progress. Contents Intro Disclaimer Initial inspection and basic disassembly Manuals references Repair workflow Boards condition check Diagnostics Firmware Tweaks Main reference upgrade Additional output amplifier for 0.

It is backlit with red LED so you can see it even without covers removal. Internal Memo Manual. Same as A, adds temp controlled crystal. Frequency Divider output to 10 Hz.

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