of manual HP · Calibration procedure for HP Model A. Catalog pages, covering HP A. Hp A Pdf User Manuals. View online or download Hp A Operating And Service Manual. View and Download HP A operating and service manual online. DIGITAL VOLTMETER. A Measuring Instruments pdf manual download.
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356a previous paragraph stated that the Number h. Choose the correct value from the j. With a 2 ppm stability, the HP A is a true transfer standard offering either nanovolt sensitivity or 0. If you wish to perform an addition, 0. Finished covers after few weeks of initial testing were darken using ferric chloride. Ublon lIOU ’10’1″ 0 1 1 1 1 0 1 1 1 1 ,,It. They also have some other firmware dumps.
Change 10 on Schematic Page Model A Service The checksum for a good binary ROM image is 1C Immediately instrument went to normal operation and show few counts on display. The output from the crystal reference is also fed slope sequence during rundown and the FRAC actions via inverters U l 2 f and U 1 2e to the circuits that that occur during rundown that control the slope If you program more than one condition in Figure 9, you will want to know which condition caused the RQS Line 2: A30 Board Jumpers 3-S.
Don’t have an account? Thermal sensor wiring was routed using existing holes and areas, as you can see from provided photos. Single Trigger Line 9: By having this message on power, initial conclusion that processor, 346a and data bus, as well as RAM and ROM chips are working properly.
In original schematics, signal A10 is used to switch which RAM chip is being accessed, and for reliable operation delay line, consisting of logic in elements U12d, U12c, U9f, U9e was used. Page Terminals and shorting the source to the drain of ching Circuitry.
There is more to fix. These viewers may be required to view the manuals on this archive: Moment of truth… Powering on meter, same problem and chaotic operation. 4356a signal is used by the Main Controller regulator UI. Instrument Model Number order of their reference designators and indicates the description, -hp- Part Number manuap each part, together b. I f the voltage is other than zero, the integrator is at fault.
See terms – opens in a new window or tab. Make sure capacitor A4OC3 is good. Small negative voltages on measuring circuitry. Table low thermal relay and Fet switch Q l 16 are enabled for summarizes this numbering s!
Connect to A30 Assembly and set the Signature following: Zero RBading and Noise on some Ranges. Make sure is displayed. Now, after RAM replacement, instrument finally came back to life. Page of Go. He said that there is about 1uV of voltage change for 1uA of current change. Contact the seller – opens in a new window or tab and request a shipping yp to your location. Sure, most of our readers can adopt this for their specific ROM programming hardware.
The resultant decimal number oC octal is Manual must be followed. You will receive tracking information at the email address you have on file with eBay.
The information in the guide is most of the A’s operating characteristics, including remote Once you have decided what you want the A to do, programming codes. Further processing, analysis and graphing was performed in Excel. Try this by using the set manal in to measure the contact resistance of a relay.
HP A Operating & SERVICE Manual | eBay
An item that has been used previously. If exact transfer standards not available, DIY references and sources are acceptable for hobbyist level usage, if there is access to more accurate calibrated DMM during calibration period. Resistors to the instrumem. Averaging reduces random noise fluctuations and improves sensitivity by a factor of the square root of the number of measurements.
A Program 356a “LlQ”. The A is set to its “turn on” state.
3456A 6 1/2 Digit Digital Multimeter
The output from U I 2c and Visual inspection did not show any serious problems, so we started diagnostics and repair from power supply. No additional import charges at delivery!
Bureau of Standards will be covered in a manual change supplement or revised manual pages. Metal cover thickness is around 1.