Chapter 1: Safety Considerations
8
CEE 22 Standard V female connector on the instrument end of the cable. This is the same connector used on
the US standard line cord supplied with your TDC5. Omega Engineering (
http://www.omega.com
) is one source
for international line cords, as described in their User
’
s Guide.
The wiring polarity of a properly wired connector is shown in the Table 1-1 for both US line cords and
European line cords that follow the
“
harmonized
”
wiring convention.
Table 1-1
Line Cord Polarities and Colors
If you have any doubts about the line cord for use with your TDC5, please contact a qualified electrician or
instrument service technician for assistance. The qualified person can perform a simple continuity check that
can verify the connection of the TDC5 chassis to earth and thereby check the safety of your TDC5 installation.
Line Voltages
The TDC5 is designed to operate at AC line voltages between 90 and 240 VAC, 50 or 60 Hz. No modification
of the TDC5 is required when switching between US and international AC line voltages.
Switched AC Outlet Fuses
Both of the switched outlets on the back of the TDC5 have fuses above and to the left of the outputs. In
accordance with international safety standards, both the line and neutral connections are fused. For Output 1,
the maximum allowed fuse rating is 3 A; for Output 2, the maximum allowed fuse is 5A.
The TDC5 is provided with 3 A and 5 A, fast-blow, 5 × 20 mm fuses in the switched outlets.
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 A. You may want to use a
2.5 A or 3 A 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.
TDC5 Electrical Outlet Safety
The TDC5 has two switched electrical outlets on the rear panel of its enclosure. These outlets are under the
control of the TDC5
’
s controller module or a remote computer. For safety considerations, whenever the TDC5
is powered, you must treat these outlets as being on.
Line
Neutral
Earth Ground
US
Black
White
Green
European
Brown
Light Blue
Green/Yellow
Warning:
If you replace the line cord, you must use a line cord rated to carry at least 15 A
of AC current. If you replace the line cord you must use a line cord with the same polarity as that supplied
with the TDC5. An improper line cord can create a safety hazard, which could result in injury or death.
