BG 805 981 BE (0201) QMG422.oi
21
4 Installation
DANGER
Before you connect the equipment make sure that the line voltage corresponds
to the specifications on the nameplate.
A 3-conductor power cable with protective ground must be used.
The power outlet must have a protective ground contact.
Extensions without protective ground conductor are inadmissible.
To ensure continuity of the protective ground, always connect the power cable
before all other cables. Conversely, unplug all other cables before the power
cable.
Do not yet switch on the equipment!
WARNING
In rack installations the temperature inside the rack must not exceed 40ºC.
Ensure adequate air circulation.
The air filters inside the unit should be periodically checked and serviced (refer to
64).
In desktop installation the air should be able to enter through the lateral inlets
and exit through the rear panel slots without obstruction.
Install peripheral components such as the analyzer, QMH 400/410, QME 125 etc.
in accordance with the information in the respective user’s guides.
All components involved must be grounded to a single point. Utilization of a single
power distributor is recommended. The only exception is the computer, but only if it
is connected to the QC 422 by means of a fiber-optic link.
Skilled personnel
Make sure that the QMA, the vacuum chamber and the entire equipment is
always connected to the protective ground.
Hazardous voltages up to 600 V are present on the QMA If this unit can be
touched by the user when the vacuum system is open, additional protection is
required, e.g.:
Mech. protection against contact
Forced disconnection of the QMS/QMI 422 line voltage by means of a
door contact
The electrode system of the QMA must not be subjected to hazardous external
voltages (from contact, arcing, plasma, ion or electron beams, etc.). If such
danger hazards in the vacuum system appropriate protection measures must be
taken there (arrangement, shielding, grounding, etc.) that reliably preclude such
influences. In addition the QMS/QMI 422 must have a permanent ground
connection (no plug!). On the QMS 422 the ground terminal is located behind the
power inlet, on the QMI 422 there is an M4 thread on the rear panel. Prepare this
ground connection from yellow/green stranded copper wire:
2.5 mm
2
if mech. protected (according to DIN VDE 110 T540)
4.0 mm
2
if unprotected
Also refer to the standards applicable to your system.
4.1 QMS/QMI 422
4.2 Overall system
