TEC-B-01 User Manual
____________________________________________________________________________________________________________________________
__________________________________________________________________________________
version 1.1
page 21
If you a working on very fast currents
Lower the GAIN by approximately 10%.
Switch the
control mode switch
to FAST, SERIES RESISTANCE COMPENSATION to
activate the series resistance compensation. Rise the amount of SERIES RESISTANCE
COMPENSATION and watch the current output. The capacitive transient seen on the current
trace should be mono-exponential. The critical compensation is achieved when the slow tail of
the transient disappears. If you see ringing around the slow tail this a sign that the electrodes
are not optimally positioned (see also chapter 0).
Hint
: SERIES RESISTANCE COMPENSATION is done by positive feedback in the control circuit,
which can lead very quickly to stability problems. Repositioning the electrodes is recommended
whenever possible instead of extensive use of SERIES RESISTANCE COMPENSATION (see also
chapter 0).
Note
: With a standard cell model described in chapter 4 you cannot verify the advantages of the FAST
mode (because no series resistance is simulated). Ask npi for a modified cell model with series
resistance simulation.
Details of how to tune PI controllers and some theoretical aspects are described in chapter 9.2.
