Sutter Instrument BV-10, Руководство по эксплуатации, Страница: 23 / 38

BV-10 OPERATION MANUAL – REV. 3.00 (20180423)
21
current-voltage relationship of a micropipette is non-linear; doubling the current may
produce much more than twice the voltage drop. Changing the sign of the current can
dramatically change the magnitude of the voltage drop. As a result, there is no single number
that uniquely defines the resistance of a pipette. Thus, two accurate instruments employing
different measuring currents could produce completely different measured values of an
electrode's resistance and both would be valid. It follows that an electrode resistance meter
need only have absolute accuracy to within a few percent to accommodate most users.
However, it is important to measure resistance with high resolution, particularly when
screening electrodes or when beveling.