MKS Stabil-Ion 370 Series, Инструкция по эксплуатации, Страница: 41 / 122

3 Installation
3-5
Series 370 Stabil-Ion Instruction Manual - 370119
3.4 Installing the Control Unit and Power Supply
1. Provide adequate ventilation for the Control Unit to dissipate 15 watts and for the Power
Supply to dissipate 50 watts. ALLOW AT LEAST 1 IN. CLEARANCE AROUND THE SIDE AND
TOP VENTILATION SLOTS ON THE POWER SUPPLY.
2. Do not mount the Control Unit or Power Supply above other equipment that generates
excessive heat.
3. This product is designed to operate over the range 0-40
°
C. Ambient temperatures above 40
°
C
may damage the product. For optimum electrometer calibration stability, the Control Unit
ambient temperature should be 25
±
5
°
C.
3.4.1 Grounding the System
1. Connect a heavy duty ground wire #12 AWG or larger from the ground lugs on the backs of
the Power Supply
and the Control Unit to your facility grounding electrode system. This will
provide an earth ground for the Power Supply and for the Control Unit in the event either the
interconnect cable or power cable are not in place. Do not connect the ground lug to the
vacuum system or other component. Connect it directly to the facility grounding system such
as a grounded outlet box or a grounded copper water supply pipe. Do not rely on small metal
water lines to ground a component. Later, someone may replace the metal tubing with plastic
tubing thus unwittingly causing a potentially dangerous situation.
2. Provide a connection to ground for other instruments with electrodes in the vacuum system
possibly exposed to high voltage electrical discharges.
3. Provide a connection to ground for each ungrounded metal component in, on or around the
vacuum system, including the gauge envelopes, which personnel may touch and which can
potentially be exposed to high voltage electrical discharges within the vacuum system. For
example, a metal bell jar resting on an organic O-ring must be connected to ground if an
ionization gauge is to be used or if other high voltage sources are present in the vacuum
system.
Be aware that an electrical discharge through a gas may couple dangerous
high voltage directly to an ungrounded conductor almost as effectively as
would a copper wire connection. A person may be seriously injured or even
killed by merely touching an exposed ungrounded conductor at high
potential.
This hazard is not unique to this product.
Compliance with the usual warning to connect the power cable only to a
properly grounded outlet is necessary but not sufficient for safe operation of
a vacuum system with this or any similar high voltage producing product.
Grounding this product does not and cannot guarantee that other
components of the vacuum system are all maintained at earth ground.
All conductors in, on, or around the vacuum system that are exposed to
potential high voltage electrical discharges must either be shielded at all
times to protect personnel or must be connected to earth ground at all times.