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Panel Indicators, Controls and Connectors – Rear-panel Connectors
The power switch is used to turn on the electronics in the Reference 30k Booster. It controls AC power (mains)
into three AC-DC converters (power supplies) inside the Reference 30k Chassis. The instrument can operate in
pass-through mode even with the power switch off.
Protective Ground and System Ground Binding Posts
Grounding is discussed in detail in Appendix B.
The Protective Ground binding post is a convenient access point to the protective (earth) ground in the
Reference 30k Booster. It is connected to the third wire in the AC power cord and to the Reference 30k
Booster's metal chassis.
This binding post can be connected to an additional earth ground to form a redundant protective ground.
The System Ground is the common voltage reference point for the Reference 30k Booster's circuitry. It floats
with respect to the Protective Ground.
A strap is provided to connect the Protective Ground and System Ground. Tests on electrochemical cells
isolated from earth ground may see lower noise when the grounds are connected.
Warning:
system you are testing is earth-grounded. Two earth-ground connections in a high-energy electrochemical
system can create hazardous conditions.
The ground strap is normally left on one of the binding posts when it is not being used. Pictures in this chapter
show the strap rotated to a safe position. A photograph in Appendix B shows the strap in use.
Ref3000 Expansion Interface
The Ref3000 Expansion Interface contains control and status digital signals needed for Reference 30k Booster
operation. Gamry does not support connection of this interface to any instrument other than a Reference 3000
potentiostat.
Do not connect Protective Ground and System Ground if the electrochemical
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