Gamry Reference 600+ - Appendix D: Auxiliary A;D Input Characteristics; Aux A;D Specifications; Function Call to Set the Aux A;D BNC Characteristics

Appendix D: Auxiliary A/D Input Characteristics
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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
3.276 V
Input Impedance
100 kΩ(approx)
Low Impedance Selected
or
10 GΩ(typical)
High Impedance Selected
Input Bias Current
< 10 nA
High Impedance selected
Filter Cutoff
20 Hz  20%
With Low Bandwidth selected


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.