Appendix D: Auxiliary A/D Input Characteristics; Overview; Jumper Identification - Gamry Instruments Reference 3000 Operator's Manual

Appendix D: Auxiliary A/D Input Characteristics

Overview

The Controller board used in the Gamry Instruments Reference 3000 potentiostat has jumpers or switches that
configure the input circuitry used for the Aux A/D function. Early units have jumpers, while later units have
CMOS switches set using software. The changeover occurred in 2009.
We usually ask that you return your Reference 3000 to Gamry Instruments if you need to change the hardware
jumpers. This information is provided so a qualified service technician can change the Aux A/D input jumpers
in the field.
The CMOS switches are set using a function call in an Explain script. After the CMOS switches are set, they
remain in the selected position until another script resets them. The settings return to their default values on
reset or Power Up of the Reference 3000.
Call or e-mail your local Gamry representative if you need to change your Auxiliary A/D input characteristics,
and you are uncertain which type of control board you have.

Jumper Identification

The three jumpers that configure the Aux A/D input are in a cluster located at the upper right side of the
Controller Card. See the figure below for jumper locations.
Auxiliary A/D Input Characteristics
Figure D-1
Auxiliary A/D Input Configuration Jumpers
View of Reference Family Controller Board
95
Filter Jumper
Input Z jumpers