MKS PR 4000 F, Instruction Manual

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Chapter 2: Installation PR4000F
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4. For shielded cables with flying leads at one end; it is important at such end, to ground the
shield before the wires exit. Make this ground with absolute minimum length. After picking up
the braid’s ground, keep wires and braid flat against the case. With very few exceptions,
grounded metal covers are not required over terminal strips. If one is required, it will be stated
in the Declaration of Conformity or in the instruction manual.
5. In selecting the appropriate type and wire size for cables, consider:
A. The voltage ratings;
B. The cumulative I
2
R heating of all the conductors (keep them safely cool);
C. The IR drop of the conductors, so that adequate power or signal voltage gets to the device;
D. The capacitance and inductance of cables which are handling fast signals, (such as data lines
or stepper motor drive cables); and
E. That some cables may need internal shielding from specific wires to others; please see the
instruction manual for details regarding this matter.
2.4 Installation, Mounting
The PR4000F is designed for use in dry and warm environment with sufficient ventilation. The
device must be installed in such a way that air can circulate free. Do not cover the openings at the
instrument’s housing. If there are heat loss generating devices located next to the unit make sure
that no excessive heat is transferred to the PR4000F.
Note Position the unit with proper clearance , to allow air cooling, so that the
unit can operate within the specified temperature as listed in appendix A.
Do not cover the openings at the instrument’s housing.