Models 947, 948 and 960 Leak Detectors Operations and Service Manual
1-24
1.16 Installation Preparation
To prepare the 947/948/960 for operation:
❑
Have power and liquid nitrogen (948/960 only) available
❑
Check oil level of wet pumps
❑
Adhere to special installation requirements for a clean room (if required)
❑
Set up an appointment for Installation services (see page 1-25)
1.16.1 Power
CAUTION
Varian strongly recommends the use of surge protection to
improve the immunity of the 947/948/960 leak detector against
unidirectional transients caused by the following phenomena:
❑
Switching phenomena in the power network
(e.g., switching of capacitor banks)
❑
Faults in the power network
❑
Indirect lightning strikes
Mains supply:
❑
115 VAC, 50/60 Hz, 20 A service, or
❑
230 VAC, 50/60 Hz, 15 A service (must be ordered)
CAUTION
Mains supply voltage fluctuations shall not exceed ±10% of the
nominal voltage.
Transient overvoltages shall not exceed values according to
Installation Categories (Overvoltage Categories) II of the
UL3101-1 Standard.
Fixed mains socket-outlet shall be connected to PROTECTIVE
EARTHING system.
For indoor use only, Pollution Degree II in accordance with
UL3101-1 Standard.
