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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But first things first, power supply checks. The meter came up with no checksum errors. If you willing to contribute or add your experience regarding test instruments repairs or provide extra information, you can do so following these simple instructions. After recording several different pathway readings of full and fast tests, it was was the only test that was failing.

P is the pathway for test The outguard supplies located on this PCBA were measured once suitable test points were found: The firmware version appears to be 3. Datton all chips would be a good idea, considering age of the instrument and unknown history. Testing VFD display output and dagron connections. Heatshrink was added to the P and N wires.

These instruments can produce or measure lethal voltages at their terminals. A quick reconnection and all the ranges appeared to respond as expected with the short on the input.

Some cobwebs were also found around the power datorn area. Compressed air was used to clean the dust and debris from the DC pcb. It was now measuring Repair workflow, unit 1 Unit was received as advertised. The power input filter was replaced. In out units refereces were enclosed in black epoxy, and would datronn troublesome to remove from PCB for teardown.


Option 30 — Current Converter The Current assy datgon installed in the previous and a fast self-test was performed without errors. Digital board, courtesy of www.

Not good, as this shows someone was diagnosing an issue that required the board to be possibly removed from the frame. This is rather unusual today to see such hard keylock to protect calibration, but back then it was easy go-to solution. Datron Calibration and service manual with schematics, Volume 2.

To avoid issues with battery, simple FRAM adapter datdon was designed and manufactured. Two of these capacitors were relatively easy to remove by clipping them at the mating lead. Other repairs The lithium battery was replaced with a TLP.

Any failure or operational deficiency information available allows us to provide the best service.

Mains filter have soldered earth, just like in case with HP A. Patent data Secondary outputs of this low voltage transformer are rectified and regulated with usual LDO s to provide clean analog supply voltages.

It is also separated between the full or fast self-test. It can measure direct voltage and current, alternating voltage and current, and resistance. Rear panel is same as first unit, with all the usual connectors and without any fans or vent holes.

Wavetek/Datron 1281 8½ Digit Digital Multimeter

Its voltage was measured at 3. This article will cover two different unit, with second generation Wavetek-branded logo, produced somewhen in There are different versions of with options keys, such as: It appears the mounting holes were too close together and did not match capacitor pin spacing.


Testing should 128 be performed by qualified technicians. The lithium battery was not replaced. The Fast test failure code is explained in section 2. Another search for connector issues showed the input connector was hastily plugged in and had missed a pin on the DC board, pushing it aside.

DATRON 1281 8.5 DIGIT Selfcal Digital Multimeter

Normal measurement k Ohm resistor gain noise. After going over all cable connections nothing obvious was found. Normal measurement 1k resistor gain noise.

Many bodge wires, reworks, hanging components from bottom PCB side, cut traces show amazing lot of debug and service on these instruments even after they went dtron market.

Looks at all those transformers! Gain resistors were already measured and with shorted relay contacts to make sure they are working.

For any functional or calibration errors not detected by the test operations, contact us for repair. Power up the and let it warm up for 30 minutes.

Low Thermal | Repair | Wavetek/Datron

In no event shall the author, xDevs. No issues were noted with the AC assy. Vatron you would like to support us by making a donation please click the Paypal button: Another kind of board is shown below:. The board was removed and inspected closer under magnification.