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The 34 is a RETLW instruction, the bit we're interested in is the calibration value. In the example above it is 8C but it will vary from one device to another which is why it is important to know the actual value in each PIC.
it's mean that calibration value is 34XX, but XX is factory calibration for each pic, well you can try a value like 34A0 or 348C or many others
"If you have lost the setting you can calculate a new value using the project here"