Any pharmacopia not mention the procedure for calibration
of instruments but they give criteria for there different
test and manufacturer also suggest procedure for
calibration .On these basis every organisation prepare
there calibration SOp for instruments.
i set electrode to 7 buffer than i used it to check 4 buffer
and 10 buffer if the results are not as expected than is it
better to set the buffer again to 4 buffer or is there any
other method available please let me know ...