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Find great deals for Datron DIGIT Selfcal Digital Multimeter – Faulty. Shop with confidence on eBay!. Wavetek/Datron Multi-Product Calibrator .. The from Wavetek/Datron is a high performance, 8½ digit bench top multimeter. It can measure direct voltage. Datron repair. «on: January 26, , am». Hey. «Last Edit: February 02, , am by whatamidoing». Logged.

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Another gotcha is that it is important to note which lead is offset as there are some components that will prevent it from going in properly.

Credits for storing these manuals goes to KO4BB. This is rather unusual today to see such hard keylock to protect calibration, but back then it was easy go-to solution. The wires are a little short and there is some noticeable stress.

Schematics clickable for PDF. All tests completed now without errors. Service manual decode message for states: The firmware version appears to be 3. That likely caused some excessive 2181 flow thru webs and poor bug, causing measurement issues. Looks at all those transformers!

Datron 1281 8.5 DIGIT Selfcal Digital Multimeter – Faulty

Patent data Secondary outputs of this low voltage transformer are rectified and regulated with usual LDO s to provide dayron analog supply voltages. In out units refereces were enclosed in black epoxy, and would be troublesome to remove from PCB for teardown.


Tweaks and tricks TBD. No repair required here. Digital board The outguard supplies were measured: But thankfully, we got and able to share full datasheet for DCE2.

All information posted here is hosted just for education purposes and provided AS IS. Testing VFD display output and test connections Image 4: The board was reinstalled and the fast self-test was performed.

It looked good with the input shorted, however the OHM s readings ddatron open. Datron Service manual, Calibration and servicing. After going over all cable connections nothing obvious was found. Jumpers LK, LK, LK can be used to bypass interface from optional boards to isolate and narrow down faulty module.

Both meters show zero errors after tests. If the fast test passes, next run the full test from the daron button menu. It appears the mounting holes were too close together and did not match capacitor pin spacing. It is hoped that the capacitor replacement will cure the DCV Error 121 it did on the first meter. Datron photos CH amplifier. Test Instructions These instruments can produce or measure lethal voltages at their terminals. What is the benefit in such double conversion?


Datron DIGIT Selfcal Digital Multimeter – Faulty | eBay

The Digital board, however, has no markings and does not match the component layout drawing in the service manual. Other repairs The lithium battery was replaced with a TLP. For any functional or calibration errors not detected by the test operations, contact us for repair. It was chosen to repair last repair due to the number of errors. Run the fast test from the test button menu. Redistribution and use of this article or any images or files referenced in it, in source and binary forms, with or without modification, are permitted provided that the following conditions are met:.

Testing VFD display output and test connections. Might be worthy to take a note of cable locations before removing PCBA:.