Gamry Instruments Reference 30k Booster, Operator'S Manual

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Safety Considerations – CE Compliance
13
CE Compliance
The European Community has instituted standards limiting radio-frequency interference from electronic
devices and mandating several safety requirements.
Gamry Instruments, Inc. has modified its instruments, including the Reference 30k Booster, to comply with
these standards.
The relevant CE regulations include EN55022 Class B and EN60950.
Cell Fuses
One of the safety features built into the Reference 30k Booster is fuses in the high-current cell leads. These
fuses open if currents in excess of the booster’s 30 A rating flow into or out of the cell. The time required to
open the fuses depends on the severity of the current overload. Currents of 50 A of more will open the fuses
quickly.
Both the Counter and Working electrode leads are protected by 30 A blade-type fuses, accessible from the
front panel of the instrument.
The fuses protect the cell from excess current from two possible error conditions:
1) improper grounding
2) electronics failure in the booster
The grounding conditions that create the problem are discussed further in Appendix B.
The fuses used for this function are rated for 30 A and Fast Blow operation. One suitable replacement fuse is
the Littelfuse 0257030.PXPV. The fuses are green. A portion of the plastic housing of each fuse can be seen
near the middle of the Reference 30k Booster’s front panel.
Caution:
The cell lead fuses only prevent current flow into or out of the counter and
working electrode terminals of the Reference 30k Booster. These fuses do not protect against excessive
current that does not flow through the instrument. For example, they do not protect against short-circuits in
the electrochemical cell or in the high-current cell leads.
The cell fuses are not vital for electrical safety. They can prevent hazardous conditions within
the cell attached to the Reference 30k Booster. They also prevent damage to the instrument when it is
improperly grounded.