Fuses Located In The Cable Hood - Gamry Instruments Reference 3000 Operator's Manual

Always turn off the Reference 3000 and disconnect both ends of the Counter/Working cable
before checking or replacing the fuses in the cable.
In this fuse arrangement, you can remove the fuse from the cable by unscrewing the brass knurled nut on the
fuse holder, just below the banana plug. After a fuse is removed, you can check it using an ohmmeter, such as
that found on modern digital voltmeters. Do not trust a visual inspection of the fuse. A blown (open) fuse
should always have a resistance of greater than 100 Ω. The resistance of a good fuse is very small.
Four replacement fuses should accompany every cell cable shipped by Gamry Instruments. The Gamry
Instruments Part Number for the in-line fuses is 630-00019. If you need to buy replacement fuses locally, we
currently only recommend Fast Acting (FF), 3.15 A, 5 × 20 mm cylindrical fuses from the Bussman
Corporation. The Bussman Part Number is BK/GMA-3.15-R. Fuses with similar ratings from other manufacturers
have not been tested, so we cannot recommend their use.
Caution:
fuse. Use of an improper fuse, especially a fuse with a higher current-rating, could cause instrument failure
if a battery cell is improperly connected. Use of a non-approved fuse will void Gamry's factory warranty.

Fuses Located in the Cable Hood

The in-line fuses in the Counter/Working are expensive and large enough to be awkward, especially when low-
impedance connections are required. Newer Counter/Working cables use a simple design with fuses located
within the cable hood. This approach is less expensive and allows lower-inductance cell connections.
Cell Connections – Fuses in the Cell Cable
Figure 6-1
Open Fuse-holder Showing Fuse
Fuse
Always replace the fuses in a Reference 3000 cable with the recommended
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