2.1 Installation of the
Instrument
2.1.1 Installation
Caution In order to ensure adequate ventilation
of the UL 200, a space of at least 10 cm
must be kept unobstructed to the sides.
Also the clearance at the rear must be
no less than 10 cm. Moreover, the venti-
lation slits at the holder for the hand unit
under the UL 200 as well as under the
recess for the handles must not be
covered. For this reason you must never
place the UL 200 on thick and soft mats
(foam rubber, for example).
The UL 200 is capable of reliable operation under nor-
mally encountered industrial conditions (for these refer
also to Chapter 1.2.3).
2.1.2 Preparations for Initial Start-Up
The UL 200 is supplied ready for operation.
Caution Before operating the instrument for the
first time, you must remove the yellow
shipping seals on the gas ballast con-
nection (3/6) and the exhaust connec-
tion (3/5). Retain the shipping seals in
case you want to ship the equipment at
some later date.
When operating the UL 200 in closed rooms and especi-
ally when detecting leaks in the sniffer mode on large test
objects or when actuating the pump’s gas ballast, you
should connect the „EXHAUST“ (3/5) connection to a line
leading to the outside of the building. In rooms where the
helium concentration significantly exceeds 5 ppm, the
connection of fresh air feed lines is also recommended.
Air which is free of helium should be supplied via a hose
line which is connected to the „VENT“ connection (3/4).
Additionally, the gas ballast connection „GAS BALLAST“
(3/6) should also be supplied with fresh air.
With the aid of the angled bracket which is supplied with
the instrument it is possible to easily connect plastic
tubes (6 mm outside diameter and 4 mm inside diame-
ter).
Note
Before starting the instrument for the first time, check the
oil level in the forevacuum pump.
In order to remove the mechanical cover, turn the UL 200
first in the way as shown in the left part of Fig. 3. Insert a
flat blade screwdriver into the openings (3/9) in order to
disengage the mechanical cover (3/8) at the lower side.
For this also refer to Chapter 3.2.1 with figures 6 and 7.
Then pull the mechanical cover upwards to the stop and
take it away to the front (please refer to the enclosed
operating instructions for the pump when wanting to
check the oil level).
2.2 Electrical Connections
Note
In general, the regulations as laid down in the currently
valid VDE 0100 must be observed.
Caution Before connecting the instrument to the
mains you must make sure that the
mains voltage rating of the instrument
coincides with the locally available
mains voltage.
The mains voltage rating for the instrument can be read
off from the name plate under the handle at the mains
switch.
The mains voltage setting of the UL 200 is fixed and can
not be changed.
A separate fuse for each of the mains conductors has
been integrated into the mains socket (3/7).
The mains voltage is applied to the instrument via the
detachable mains cable which is supplied with the instru-
ment. A mains socket is available for this purpose at the
left hand side of the instrument.
Caution Only 3-core mains cables having a pro-
tective ground conductor must be used.
Operation of the instrument where the
ground conductor has been left uncon-
nected is not permissible.
10
TH 10.211/8.02 - 12/97
To Next Page
Loading...
