Precautions; Line Voltage; Grounding - Agilent Technologies 4072A Pre-Installation Manual

Precautions

To ensure operator safety and stable system operation, observe the following precautions.

Line Voltage

Make sure the line voltage is within the specified range. If the line voltage is too low or too high, sporadic failures
or complete system shutdown may occur.
NOTE
Agilent Technologies recommends that the following line voltage conditions be satisfied for
measuring low-current and low-voltage with the 4073A:
Burst Noise:
Surge Noise:
Agilent Technologies recommends that if the conditions above cannot be met, the tester should use
the noise cut trans.
This line voltage environment conforms to EN61326-1.

Grounding

The system cabinet, the system controller, and all computer peripherals are tied to earth ground through the
three-wire power cable grounding wire. Earth grounding protects the operator against shock hazards and protects
the system components against catastrophic events, such as lightening.
Also, all system components must have a common ground reference that is electrically isolated from any
non-system equipment due to the interfaces between the system controller, system instruments, and computer
peripherals. Otherwise, signals generated by non-system equipment could cause system errors.
WARNING
To protect operators from electric shock injury due to current leakage, a grounding
connection is essential before connecting the power supply. When you connect the system to
the power supply, connect the grounding wire before connecting other power wires.
If you plan to include a ground-fault circuit interrupter (GFCI) in your power lines, select a breaker that has a rated
sensitivity of 30 mA for the 208/220/240 Vac line voltage option. This ensures that the breaker is not tripped by
regular current leakage. For the 200 Vac line voltage option, the PDU is equipped with a GFCI as a main circuit
breaker.
Chapter 2
Agilent 4072A/4073A Pre-Installation Guide, Edition 3
£ 1 kV (earth, line and neutral modes)
£ 1 kV (common and normal modes)
Site Preparation
Precautions
17