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A-140, M-140 and multimeter

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Hello

I have chines laser driver this one (12V TTL 1W 2W 3W 445nm 450nm Laser Diode LD Driver Power Supply Stage Light | eBay)

and blue laser diode from DTR's Laser Shop A-140 and M-140

For calibrating laser driver I connected in parallel laser diode and my multimeter Uni-T UTM171B and after that my laser light but no burn

When I change from V to A on my multimeter - I have around 1,9A but laser diode not burn

As I have at this moment three diode with same problem - I suspect laser diode and multimeter not compatible at the same time?

And one more question
Calibration Voltage I can without connecting a laser diode but with Amps - its a little bit problem
I have BlackBuck 8M and NUMB44 diode if I'll try calibrate with multimeter - i received one more broken laser diode?

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