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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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The serial number was still correct as was the line frequency, as expected. This second unit actually happens to be the the first Datron acquired. The Digital board has firmware version 3. Fluke A have combined Guard terminal, switchable between passive or active mode.

Low Thermal | Repair | Wavetek/Datron

121 That likely caused some excessive currents flow thru webs and poor bug, causing measurement issues. For any functional or calibration errors not detected by the test operations, contact us for repair. The other leads are soldered straight to components with insulating sleeves.

There are different versions of with options keys, such as: A screw was also missing that held the connector in place. Front 12811 No issues with front panel or display. Repair workflow, unit 2 This second unit actually happens to be the the first Datron acquired.


Datron Calibration and service manual with schematics, Volume 2. There are no official man manufacturer service for this old DMM s anymore, so hopefully we will not need custom unobtainable components, as that can easily put repair into BER. Paint on handles did not last satron, having visible peeling now.

Normal measurement 1k resistor gain noise. A rear input option is available for ratiometric measurements on voltage and resistance functions. After the first repair, it was determined to wait and see if the meter would still pass diagnostics based on the chances of damaging another part.

All errors were now gone and a fast looptest passed after 24 iterations. Mains filter have soldered earth, just like in case with HP A The power supplies were remeasured. It is measuring value through DC range, so it is a good possibility that offset on DCV measurement causing self-test for fail.

| Datron DMM repair and calibration worklog

Testing should only be performed by qualified technicians. Model using two identical Linear LTZ based modules, labeled Datronwith custom hermetically sealed Vishay metal foil resistor network, while Model using LTZ module and LM module to save cost.

Tweaks and tricks TBD. Testing VFD display output and test connections.

Datron 1281 8.5 DIGIT Selfcal Digital Multimeter – Faulty

Ref- Magnitude Ratio drift. All information posted here is hosted just for education purposes and provided AS IS. Schematics clickable for PDF. Datron Calibration and service manual, Volume 1 and 2, Issue 1, July Its voltage was measured at 3.


Wavetek/Datron 1281 8½ Digit Digital Multimeter

Fuse Tests Fuse is open circuit. This colorful PCBA have all critical components for DC and main voltage reference modules, covered by black plastic covers.

The remaining capacitors had no additional gotchas. Looks at all those transformers! A quick test of the inguard supplies on the DC board showed the following values: The board was reinstalled and the fast self-test was performed. Common Failures Misapplication of voltage or current — The can be damaged by sourcing high voltage into resistance or current functions.

Itron does not have any stock for the display and do not have public documentation for it. The power supplies were remeasured.

Testing VFD display output and test connections Image 4: The showed a low noise source but the value was nowhere near specifications. The service manual includes diagrams of the circuit board parts involved with specific tests.