Kazrajora Another kind of board is shown below: It is measuring value through DC range, so it is a good possibility that offset on DCV measurement causing self-test for fail. Repair workflow, unit 2 This second unit actually happens to be the the first Datron acquired. There used to be magnets to keep handles locked in place. If you do have any questions, jump in comments!
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Gule Service manual decode message for states: The Current assy was installed in the previous and a fast self-test was performed without errors. But thankfully, we got and able to share full datasheet for DCE2. After going over all cable connections nothing obvious was found.
Datron photos CH amplifier. After disconnecting lots of cables and wires, main DC board was released and removed. Other repairs The lithium battery was replaced with a TLP. Test Instructions These instruments can produce or measure lethal voltages at their terminals. Conditions are for test are: Most likely the calibration constants are too far off. Tweaks and tricks TBD. The current source was tested using Keithley Model as control meter. The firmware version appears to be 3. All seven capacitors were changed just like the first while observing if any of the leads needed to be bent to fit the holes in the pcb.
All tests completed now without errors. In out units refereces were enclosed in black epoxy, and would be troublesome to remove from PCB for teardown. All the feedback is valued and can be added into article. The board plugs into a single socket and has an additional wire connecting to it marked A17 most likely for an additional address line to other memory ROM s. During reassembly of the bottom half of the meter, it was discovered that datronn Current assembly had some difficulty with the three connectors at the front of the pcb.
Replacement of battery dafron performed with unit powered on and a battery powered soldering iron was used to avoid loosing calibration constants and SRAM data. Detailed specifications are presented later in manuals section of this article.
All seven capacitors were changed with only one gotcha. It does not look good, but Datron engineers knew what they are doing. If you willing to contribute dagron add your experience regarding test instruments repairs or provide extra information, you can do so following these simple instructions.
This colorful PCBA have all critical components for DC and main voltage reference modules, covered by black plastic covers. Mains filter have soldered earth, just like in case with HP Datrkn. Neither boards have any REV markings on the top, but might be located on the bottom side. If the fast test passes, next run the full test from the test button menu.
Not good, as this shows someone was diagnosing an issue that required the board to be possibly removed from the frame. It was bought by Vishay in early The errors are broken down based on the type of test. As usual, all photos are clickable datro high-resolution version. Normal measurement 1k resistor gain noise.
Repair workflow, unit 1 Unit was received as advertised. A quick check of all cables to main DC board showed one that was not connected and stuffed under the main board. Ref 2 Magnitude Ratio drift. If you do have any questions, jump in comments! Looks at all those transformers! Two of these capacitors were relatively easy to remove by clipping them at the mating lead. The remaining capacitors had no additional gotchas. Datron 8. There used to be magnets to keep handles locked in place.
The board was reinstalled and the fast self-test was performed. Digital board, courtesy of www. It is supposed to be between Eatron outguard supplies located on this PCBA were measured once suitable test points were found:. Most 10 Related.
DATRON 1281 PDF
Gule Service manual decode message for states: The Current assy was installed in the previous and a fast self-test was performed without errors. But thankfully, we got and able to share full datasheet for DCE2. After going over all cable connections nothing obvious was found. Datron photos CH amplifier. After disconnecting lots of cables and wires, main DC board was released and removed. Other repairs The lithium battery was replaced with a TLP.
DMM Meters : Datron 1281
Similar Products Datron 8. At the heart of the Model , two specially conditioned volt zener references are continuously inter-compared to minimize drift rate. Coupled with the DC input amplifiers incredibly low 0. Thats as good as many Weston cells. And because the Model s temperature coefficient is far superior to a Weston cells, you dont have to worry about precision temperature control. Add the fact that it offers exceptional 0. The Model also features exceptional AC performance, with 1-year uncertainties significantly below ppm up to 10 kHz on its 1 V to V ranges.
Wavetek Datron 1281 Digital Multimeter
Datron 1281 DMM Meters