Gamry Instruments TDC4, Operator'S Manual, Page: 8 / 32

1 - 3
You may wish to tailor the fuses in each outlet for the expected load. For example, if you are using a 200
W cartridge heater with a 120 VAC power line, the nominal current is a bit less than 2 amps. You may
want to use a 2.5 amp or 3 amp fuse in the switched outlet to the heater. Keeping the fuse rating just
above the rated power can prevent or minimize damage to an improperly operated heater.
TDC4 Electrical Outlet Safety
The TDC4 has several switched electrical outlets on the rear panel of its enclosure. These outlets are
under the control of the TDC4's controller module or a remote computer. For safety considerations,
whenever the TDC4 is powered, you must treat these outlets as being on. Do not trust that the control
signals for these outlets, when off, will remain off. Do not touch any wire connected to these outlets
unless the TDC4 line cord has been disconnected.
In most cases, the TDC4 will power one or both of these outlets when it is first powered up.
Warning
The switched electrical outlets on the TDC4 rear panel must always be
treated as on whenever the TDC4 is powered. Remove the TDC4 line cord if
you must work with a wire in contact with these outlets.
Heater Safety
The TDC4 Temperature is often used to control an electrical heating apparatus that is located on or very
near to an electrochemical cell filled with electrolyte. This can represent a significant safety hazard unless
care is taken to insure that the heater has no exposed wires or contacts.
Warning
An AC powered heater connected to a cell containing electrolyte can
represent a significant electrical shock hazard. Make sure that there are no
exposed wires or connections in your heater circuit. Even cracked insulation
can be a real hazard when salt water is spilled on a wire.
RFI Warning
Your TDC4 Temperature Controller generates, uses, and can radiate radio frequency energy. The radiated
levels are low enough that the TDC4 should present no interference problem in most industrial laboratory
environments. The TDC4 may to cause radio frequency interference if operated in a residential
environment.