Lightning protection
To protect personnel and equipment, we recommend
the installation of appropriate lightning protection
equipment in areas where storms occur. Comprehensive
protection necessitates the following:
Lightning conductor
Earthed metal belts in building to protect against
electrostatic charges. This is particularly important
at greater altitudes and with dry air.
Transient suppressors in all lines leading to the
chromatograph. These are available e.g. from the
company Phoenix Contact.
Fitting the signal cables
All signal cables must be shielded outside the chroma-
tograph and not shielded within the chromatograph.
The shield must end at the screwed gland and is
grounded there on the chromatograph housing.
Loosen a suitable cable gland and remove the seal-
ing gasket
Push cable into chromatograph as far as required
Remove insulation and screen from end of cable up
to screwed gland. Expose 2 cm (1") of screen
Connect screen around sealing ring (1) and tighten
nut (2)
With classified chromatographs: secure additional
cable grip
Permissible cable diameter
Screwed gland D d
PG11
PG16
6 to 10 mm
12 to 15 mm
8 mm
12 mm
Cable type
We recommend cable twisted in pairs for TTY or
20 mA-signal lines. Example: ChromLAN, printer and
analog outputs.
CAUTION: Classified area:
All conductors must be connected. This means
that the cable must not have more conductors
than are actually required.
It is essential to refer to the connection
diagram.
D
2
1
d
Installation of chromatograph
3INSTALL.CHP, Stand Dezember 22, 1999
5
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