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Introduction – Cable Connections from Reference 3000 to the Reference 30k Booster
Cable Connections from Reference 3000 to the Reference 30k Booster
Two cables connect the Reference 30k Booster to the Reference 3000.
Analog Cable
The first is an analog cable that connects the Working/Counter connector on the front panel of the Reference
3000 to the Reference 3000 Working/Counter connector on the front panel of the Reference 30k Booster. It is
a 15-pin connector with a D-connector on each end. The connection must be made with a Gamry cable, P/N
985-00116.
Caution:
This cable has special grounding and shielding required for operation of the system. Third-party 15-pin
male-to-female cables may physically connect the instruments, but will not offer full performance, and
could cause damage.
Digital Cable
The second cable is a digital control cable that connects the Expansion Interface connector on the rear panel
of the Reference 3000 to the Ref3000 Expansion Interface connector on the rear panel of the Reference 30k
Booster. This is a 25-pin cable with a D-connector on each end. The connection must be made with a Gamry
Cable, P/N 985-120.
Caution:
This cable has special grounding and shielding required for operation of the system. Third-party 25-pin
male-to-female cables may physically connect the instruments, but will not offer full performance, and
could cause damage.
Theory of Operation
Perhaps the easiest way to think of the Reference 30k Booster is as a part that adds one additional current
range to the Reference 3000. The highest measurable current on the Reference 3000 is 3 A full-scale. When
the system is boosted with a Reference 30k, the largest measurable current increases to 30 A. Transparent to
the user, the 30 A cell current is measured by the electronics in the Reference 30k Booster, converted to 3
mA, and then sent to the Reference 3000's current-measurement circuit.
Of course, adding an additional measurement range is useless if the system cannot control cell voltage or
current. The Reference 30k Booster also contains a power amplifier that increases the output current of the
system to 30 amperes. This power amplifier has an asymmetrical output-voltage swing: it can control cell
voltages as high as +20 V, but only as low as –2.5 V. The output current is symmetrical at 30 A.
Unlike many other boosted electrochemistry systems, the Reference 3000 and Reference 30k Booster can
operate using the lower-current instrument's current ranges without disconnecting or moving any cables.
Switches in the Reference 30k Booster allow connection of the cell's counter and working electrodes to either:
•
The high current (30 A) control amplifier and 30 A I/E converter in the Booster, or
•
The 3 A control amplifier and 3 A-to-30 mA current range I/E converter in the Reference 3000, which
is called "pass-through" mode.
Do not use any cable other than Gamry P/N 985-00116 to make this connection.
Do not use any cable other than Gamry P/N 985-00120 to make this connection.
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