Chapter 4
50
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
4.3
Cable Installation
It is intended that all wiring either to or from the controller, whether
supplied by Granville-Phillips or not, be installed in accordance with the
safety requirements of NEC/NFPA 70. Cables provided by Granville-Phillips
for connection to sensors or transducers is, at a minimum, designed for use
as appliance wiring material (UL category AVLV2), and is constructed of
appropriate material and dimensions for the voltages and currents provided
by the controller. It is emphasized that it is the user's responsibility to install
cables to/from the controller whether provided by Granville-Phillips or not,
in accordance with the applicable local, state and national safety
requirements.
Raceway and/or conduit may be needed for certain installations.
4.4
Environmental Conditions
• Indoor Use.
• Altitude up to 2000 meters.
• Temperature 0 °C to 50 °C.
• Maximum relative humidity 80% for temperatures up to 31 °C decreasing
linearly to 50% relative humidity at 50 °C.
• Transient overvoltages according to installation category (overvoltage
category) II.
• Pollution degree 2 in accordance with IEC664.
4.5
Controller Installation
The controller is designed to operate a Series 355 Micro-Ion Gauge. This is
an all-metal miniature gauge with dual yttria-coated iridium or dual
tungsten filaments and a nominal sensitivity of 20/Torr.
The Micro-Ion Gauge electrometer module provides ion gauge pressure
readout from 1 x 10
–10
Torr (1.3 x 10
–10
mbar or 1.3 x 10
–8
pascal)
to 5 x 10
–2
Torr, N
2
equivalent, depending on the emission current used.
Adjustment is provided for gauge sensitivity. See
on page 98. Adjustment and an internal switch allow change to
mbar or pascal pressure units, and a user selectable “slow update” feature
triggers measurement averaging, resulting in a display update frequency of
about once every three seconds. The overpressure shutdown threshold is
internally adjustable.
1.
Provide adequate ventilation for the Controller to dissipate 15 W.
2.
Do not mount the Controller above other equipment that generates
excessive heat.
3.
This product is designed to operate over the range 0 to 50
°
C. Ambient
temperatures above 50
°
C may damage the product. For optimum
electrometer calibration stability, the Controller ambient temperature
should be 25
±
5
°
C.
Summary of Contents for Granville-Phillips 358 series
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