The Boat Anchor Manual Archive Path: /hp/a/. This is the BAMA archive. These manuals are available for download and free of charge. I am now accepting. View and Download HP A operating and service manual online. DIGITAL VOLTMETER. A Measuring Instruments pdf manual download. Hp A Pdf User Manuals. View online or download Hp A Operating And Service Manual.
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The HPA is a great device — Old, but great. The datasheet and manual are available for download:. This is part 1 of the teardown. The gallery at the bottom contains all of the images for this part. The more interesting ones are posted with extra commentary. No electronics were harmed during this teardown. Precautions were taken to avoid ESD and the other popular ways to kill stuff.
Agilent / HP 3455A Digital Voltmeter
After reassembly the meter is working just as well as it did before. I did cut my finger though. The front panel is well lit. The current meter configuration is indicated by the lighting up of the button with the function as seen in the picture below. The function and setup can be changed by pressing the required button. The buttons allow you to select and set various functions — the integrated math, storage, sample rate, trigger, measurement type and similar. All in all a very user friendly and straight forward machine.
The other side of it holds the backside measurement inputs — for fixed measurements, rack systems and such, the switch that selects between the front and back inputs and the cage door for the calibrations module.
HP3455A teardown – part 1 – calibration module and the backside
This module 33455a much defines how accurate the whole system is — it holds the voltage reference and the resistance reference.
It can be removed — the manual describes advises that you can interchange these modules between systems and it is practical really — you can send your calibration module to the lab and keep the device running. The module can be adjusted slightly by these trimpots. Precise and fun stuff. A big red resistor? And the voltage reference: Also, the board is heavily gold plated.
Note the standoffs on the ASIC…. The manula will note the high impedance standoffs for the resistor reference — a special plastic stand that isolates the high impedance stuff ends of the resistors from the rest of the board. These are then connected via flying cables with the rest of the circuit.
Also note that the resistance reference was connected to the rest of the system not like the voltage — on the board — but rather through a special plastic connector so that no gunk or crap may cause leakage and measurement errors. They were pretty serious about this stuff. Your email address will not be published. This site uses Akismet to kanual spam. Learn how your comment data is processed.
The simple generator The Coilgun Medical cable teardown Circuit Cellar publication — a new method for measuring resistors! HPA teardown — part 2 — The Logic! The datasheet and manual are available for download: The 34455a — a total view. A happy working meter.
| HP B – Calibration module from HP A
Front panel — input terminals. Power, fuse and fan shot. More snaps of the backside and the cal module cage. Calibration module — slightly opened. Calibration module pull ring. Calibration module detail 2. Calibration module detail 1.
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