Hi I have sanwa PC510a multi.
the temp reading is offset by about -1000 C
it was fine few months ago and started acting up recently
so room temp will read ~970 C
it is not the sensor ( K type) as when I plug to other meter (fluke) it reads just fine
the sensor is sanwa original
all other readings like voltage AC&DC, current AC&DC, resistance, diode, and capacitance give normal readings within
meter's specification.
I ve tried searching internet for schematic, but no luck so far.
I guess it has sth to do with the cold junction compensation circuit or sth else, but i am really blind about servicing meter.
i ve tried cleaning and brushing pcb with alcohol, again no change.
any help is appreciated.
thanks
the temp reading is offset by about -1000 C
it was fine few months ago and started acting up recently
so room temp will read ~970 C
it is not the sensor ( K type) as when I plug to other meter (fluke) it reads just fine
the sensor is sanwa original
all other readings like voltage AC&DC, current AC&DC, resistance, diode, and capacitance give normal readings within
meter's specification.
I ve tried searching internet for schematic, but no luck so far.
I guess it has sth to do with the cold junction compensation circuit or sth else, but i am really blind about servicing meter.
i ve tried cleaning and brushing pcb with alcohol, again no change.
any help is appreciated.
thanks
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