Ultra Precise Multimeter* Datron 4950 Repair** & Analysis

PCBWays precise prototyping service https://pcbway.com/g/Tj5om7
Benchtop DMMs at Welectron https://www.welectron.com/Benchtop_1
More from me sometimes https://patreon.com/marcoreps

4950 with delidded resistor networks https://www.eevblog.com/forum/metrology/datron-4950-multifunction-transfer-standard/msg1097247/#msg1097247
Inside axial Vishay foil resistors https://www.eevblog.com/forum/metrology/teardown-standard-resistors/msg891676/#msg891676
Voltage reference module schematic https://xdevs.com/doc/Wavetek/4920M/pdf/datron_ltzref.pdf

00:00 Intro
03:37 Teardown
05:08 Digital board
07:24 Current board
09:55 Ohms board
16:05 Front assembly
17:24 AC assembly
24:59 DC main board
32:08 Result :\

#metrology #repair #engineering

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