User`s guide

Installation and Setup
40
It should be checked by a qualified electrician before you connect
the instrument.
To avoid interference caused by ground loops, always connect the
ATD/TD and any accessory to the same phase of the line power
supply and insure that they share a common earth ground. Observe
outlet power limits.
Refer to the individual accessory manuals for details of installing
various accessories and their power requirements.
Before you alter or make any new electrical connections:
1. Switch off all of the instruments in the system and
disconnect their line cords from the line power supply.
2. Connect the ready start cables to the GC correctly. See
Electrical Connections on page 39.
3. If you are using the Control Software, connect the serial
cable to the ATD/TD and then to the computer. See the
Control Software manual for more information.
4. If you are using the BCD options, connect the external
devices as outlined in BCD Interface on page 185.
5. Connect the line cords of the ATD/TD, the GC and any
accessory to the appropriate AC outlet.
NOTE: When you power up the instruments, follow the correct
procedure described in the manuals that are supplied with
each instrument.
Electrical Surge
The toroidal power transformer and the switched-mode power
supply unit (SMPSU) of the ATD/TD provide a compact, high
efficiency unit.
A feature of these components, however, is that they can draw high
inrush current from the external electricity supply during power up.
In some circumstances, this current can be sufficient to cause
external excess-current devices, particularly magnetically operated
circuit breakers, to open.