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| UNI-T UT61E Multimeter teardown photos. |
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| Salas:
--- Quote from: MrSlack on April 10, 2016, 02:22:48 pm ---Probably not a capacitor or a car battery as the general nature of the high impedance inputs means that the capacitor can't discharge quickly enough. If you stick it on amps and short it then it'll just pop a fuse. Inductors on the other hand, when the magnetic field collapses can produce hundreds to thousands of volts which can jump around or through any protection and high impedance inputs. --- End quote --- A static discharge could also find its way to the main chip by jumping around If not absorbed by protection I suppose? |
| MrSlack:
It could. |
| Mike60:
Hello U61E users :) I received today my 61E. 49$ Ali.... I want to make some modification. Back light. I order TP223 it is on the way. I order MCP1703 - received. I have some leds. If everything are ok i go to next mod. I suppose this product are old. Why ? Please look attachment. Regards Mike |
| SeanB:
No idea, but I would suggest as well you order some 5mm 600VAc MOV devices and put them on the board in the 2 places SG1 and SG2 marked on the board. RS 760-6964 or 711-8149 or 289-7109 or 178-059 would all do there, low capacitance and with a clamp voltage well above what you would normally apply to the meter in most cases, but hopefully more than enough to protect the meter from major overvoltage. First would provide most protection, but will limit maximum voltage to mains voltage only, the others will enable use at 400VAC with some care. |
| Mike60:
Thank you. I will try. Regards Mike |
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