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Siglent SPD3303X(-E) calibration FW1.01.01.02.07R2 - best practice

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rolfdegen:
I'm back to the old firmware and have no failures. The question remains, why does the output channel in the new firmware turn off the output channel after a while? I tested with load (12V/50mA) on CH2 and tested without load. It switches off on all attempts.

tautech:

--- Quote from: rolfdegen on April 20, 2024, 02:58:56 pm ---I'm back to the old firmware and have no failures. The question remains, why does the output channel in the new firmware turn off the output channel after a while? I tested with load (12V/50mA) on CH2 and tested without load. It switches off on all attempts.

--- End quote ---
Just looked back through your posts and only suggestion is the newer FW is placing more demands on the control PCB PSU and its old style rectifier bridge.

In your position I would swap it out for an uprated bridge modification.
The last one I did I drilled and tapped the main heatsink and ran a 4 wire AC/DC loom to it from the front panel PCB.

rolfdegen:
Hallo electronic friends..
This bridge rectifier 2W06 from SEPRI is installed in my SPD3303X-E. The current temperature in the open housing is 41 °C after half an hour.

Siglent SPD3303X-E Frontpanel


2W06 Datasheet



rolfdegen:
I have now closed the case. After three hours of operation without load, the bridge rectifier has a temperature of approx. 50°C. No heat points. The temperature is in the green range  :-+

rolfdegen:
A TL431C ensures good stability.

SPD3303X-E Front PCB


TL431C Datasheet





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