Gamry Instruments Interface 1000 - Appendix B: Interface 1000 Cell Connector

Appendix B: Interface 1000 Cell Connector--Floating Operation
Appendix B - 1
Appendix B: Interface 1000 Cell Connector
Chapter 4 describes the connections between a cell cable and an electrochemical cell. This appendix
describes the other end of the cell cable.
Multiple pins assigned to the same signal are connected together on the Interface 1000’s Potentiostat
board. If you need to connect this signal outside the Interface 1000, you need a wire connected to any
one of the D-connector pins.
Table B-1
Cell Connector
Pin(s)
Signal Name
Use
1
Working Sen
se
Connected to the working electrode in most cases (see Chapter
4
).
This lead
has a 261 Ω resistor in the cell end of the cable. Custom cell cables are likely
to require a similar resistor.
2, 14
WS Shield
The shield for the working
-
sense input.
Driven to the same potential as Pin 1.
Left open at the cell end of the cell cable.
3, 4, 15, 17
Reference
Shield
The shield for the reference electrode input.
Driven to the same po
tential as
Pin 16. Left open at the cell end of the cell cable.
5, 7, 10, 11,
18, 19, 22,
24
Ground
The potentiostat
’
s floating ground.
Can be used to shield the cell if very low
currents need to be measured. Also used as a shield for the counter electrode
cable.
6
Counter Sense
With an Interface 1000, used to sense the potential of the counter electrode.
Allows accurate ZRA mode even with significant cell current through counter
lead’s resistance.
8
CBL_ID1
One of
fou
r
cable
-
ID bits
.
Used to identify the type of cell cable attached to
the unit. Pull to a logic High through a resistor. Ground to set the bit low.
9
CBL_ID2
One of
four
cable
-
ID bits. Used to identify the type of cell cable attached to
the unit. Pull to a logic High through a resistor. Ground to set the bit low.
12, 25
Work
ing
Shield
The shield for the working electrode inpu
t. Connected to
Floating Ground
.
Left open at the cell end of the cell cable.
13
Working
Electrode
Conn
ected to the working electrode.
The cell current flows through this pin.
16
Reference
Electrode
Connected to the reference electrode in most cases (see Chapter
4
).
This
lead has a 261 Ω resistor in the cell end of the cable. Custom cell cables are
likely to require a similar resistor.
20
CBL_ID0
One of four cable
-
ID bits. Used to identify the type of cell cable attached to
the unit. Pull to a logic High through a resistor. Ground to set the bit low.
21
CBL_ID3
One of four cable
-
ID bits. Used to identify the type of cell cable attached to
the unit. Pull to a logic High through a resistor. Ground to set the bit low.
23
Counter
Electrode
Connected to the cel
l
’
s counter electrode. The cell current flows through this
connection.
Designing cell cables for a 1 MHz potentiostat is not a trivial task. Gamry Instruments does not
recommend user-designed cables (except as a last resort). In many cases we can build a custom cable to
meet your specific needs. We’ll also be happy to discuss your cable requirements and give you assistance if
you must design and build your own cell cable.