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Similar limitations apply when the Reference 30k Booster is used with other Gamry Instruments software or
with user-written software that uses the Gamry Instruments Toolkit for experiment control and data acquisition.
Limitations
A system with a Reference 3000 Potentiostat and a Reference 30k Booster does have limitations compared to
the non-boosted system. These limitations include:
•
The maximum allowed frequency for EIS measurement is 300 kHz. The new limit applies in both 30 A
and pass-through modes.
•
Current-range auto-ranging is not allowed.
•
The system does not operate on ranges more sensitive than 30 mA full-scale.
All of these limitations can be overcome if cell current will not exceed 3 A. In this case, you
can disassemble the system and connect the cell directly to the Reference 3000 Cell Cables. Make sure to
disconnect the Expansion cable connecting the rear panels of the Reference 3000 and the Reference 30k
Booster.
Reference 30k Booster Test and Cal Cell
Every Reference 30k Booster is shipped with a Reference 30k Test and Cal cell, Gamry P/N 990-00284. This
fixture is a small printed-circuit board designed specifically for use with the Booster. It has a Test side that is a 3
mΩ 6 W resistor, and a Cal side that is a 200 mΩ 1 W resistor. The nominal tolerance of the resistors is 1%.
The Test side of the fixture can handle the full 30 A output of the Reference 30k Booster. While it was wired
for minimum inductance, resistances this low always suffer from errors caused by stray inductance. EIS on the
test side of the fixture shows an inductive impedance spectrum above 10 kHz.
The Cal side of the fixture can only handle 2 A. Higher currents will blow (open circuit) a 2 A fuse on this side
of the fixture. This fuse prevents damage to the fixture when higher currents are applied. Spare fuses are
provided with the fixture. If you need additional fuses, their Gamry P/N is 630-00027. The manufacturer is
Littelfuse and they are from their Nanofuse series. The Littelfuse P/N is 451002MRL.
Introduction – Limitations
22
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