We need to setup some automated test equipment for production testing of an offline power supply LED driver (240VAC traffic lantern).
My idea at this stage is to purchase a programmable AC power supply (such as this:
https://www.bkprecision.com/products/power-supplies/9801-programmable-ac-power-source.html )
and a programmable multimeter for reading output current, output voltage and possibly a few other voltages around the board. I would use a bed of nails setup to probe the points of the circuit I would like to measure. (See block Diagram attached)
So I guess I would also need some kind of SCPI relay board to switch the multimeter to read different points of the circuit? What could I use for that or do I just make my own for this simple requirement?
Am I on the right track?
If I used RS232 for the communications would I need multiple point to point RS232 link between the controlling device and the instruments as there is no way I know of to have RS232 multidrop.
Test routine would be fairly simple.
Set AC power supply voltage output
|
Delay
|
Read AC Current, power factor etc,
Read Output voltage and key voltage points.
|
Change AC power supply voltage
Delay
|
Read AC Current, power factor etc,
Read Output voltage and key voltage points.
If I used a PC is there software that is good to use? I've heard of Labview but haven't had a chance to familiarise myself with it and I understand it's expensive.
Or would you typically just write that software test routine yourself in C or something.
This Jig will be sent to the board loader for testing product prior to shipment as well.
So It might be good to make up a small go/no go tester for them using a microcontroller or something.
Thanks in advance for any feedback.