Appendix D: Auxiliary A/D Input Characteristics; Aux A/D Specifications; Function Call To Set The Aux A/D Bnc Characteristics - Gamry Reference 600+ Operator's Manual

Appendix D: Auxiliary A/D Input Characteristics

The controller board used in the Gamry Instruments Reference 600+ Potentiostat has software switches
that configure the input circuitry used for the Aux A/D function.
The CMOS switches are set using a function call in an Explain script. Once the CMOS switches are set,
they remain in the selected position until another script resets them. Note that the settings return to their
default values on reset or Power Up of the Reference 600+.

Aux A/D Specifications

Range
Input Impedance
Input Bias Current
Filter Cutoff



Function Call to Set the Aux A/D BNC Characteristics

The CMOS switch is set using an Explain function call. The syntax of this call is:
Pstat.SetAuxBNCImpedance (Impedance)
The variable passed to the function is a Boolean (with a value of TRUE or FALSE).
The following definitions can be used to make a script that calls this function more readable:
High impedance is TRUE
Low impedance is FALSE
A TRUE in the Impedance variable opens the switches across J902 and J903, selecting high input
impedance. A FALSE selects 100 k input impedance.
Appendix D: Auxiliary A/D Input Characteristics
3.276 V
100 kΩ(approx)
or
10 GΩ(typical)
< 10 nA
20 Hz  20%
75
Low Impedance Selected
High Impedance Selected
High Impedance selected
With Low Bandwidth selected