LEYBOLD 141 00 Release Note

UL 200
Helium Leak Detector
Cat. No.
140 00 141 00 142 00
140 01 141 01 142 10
140 10 141 10 142 11
140 11 141 11
for software version V 2.6
Technical Handbook
TH 10.211/ 8.02
Leak Detection Vacuum Measurement
and Components In Situ Analysis LEYBOLD INFICON
The Instrumental Difference TM
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Leybold Service
If equipment is returned to LEYBOLD, indicate whether
the equipment is free of substances damaging to health
or whether it is contaminated. If it is contaminated also
indicate the nature of the hazard. LEYBOLD must return
any equipment without a Declaration of Contaminationî
to the sender’s address (refer also to Chapter 3.1).
General
We reserve the right to alter the design or any data given
in this handbook.
The illustrations are not binding.
Notes on how to use this handbook
Important remarks concerning operational safety and
protection are emphasized as follows:
Warning Indicates procedures that must be strict-
ly observed to prevent hazards to per-
sons.
Caution Indicates procedures that must strictly
be observed to prevent damage to, or
destruction of the UL 200 helium leak
detector.
Note
Indicates special requirements the user must comply
with.
The references to diagrams, e.g. (2/5) consist of the Fig.
No. and the Item No. in that order.
Contents Page
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 General information . . . . . . . . . . . . . . . . . . . 3
1.1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.1 Physical data . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.3 Other data . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1 Supplied equipment . . . . . . . . . . . . . . . . . . . 4
1.3.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Technical description . . . . . . . . . . . . . . . . . . . 5
1.4.1 Forevacuum pump . . . . . . . . . . . . . . . . . . . . 5
1.4.2 Turbomolecular pump . . . . . . . . . . . . . . . . . . 5
Page
1.4.3 Mass spectrometer . . . . . . . . . . . . . . . . . . . . 5
1.4.4 Ion source . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.5 Separation system . . . . . . . . . . . . . . . . . . . . 6
1.4.6 Ion collector . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.7 Electrometer amplifier . . . . . . . . . . . . . . . . . . 6
1.4.8 Mass spectrometer supply . . . . . . . . . . . . . . 6
1.4.9 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.10 Operation and remote control . . . . . . . . . . . . 6
1.5 Description of the functions of the UL 200 . . . 7
1.5.1 Vacuum Method . . . . . . . . . . . . . . . . . . . . . . 7
1.5.2 Partial Flow Method . . . . . . . . . . . . . . . . . . . 7
1.5.3 Sniffer Mode . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Installation of the instrument . . . . . . . . . . . . 10
2.1.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.2 Preparations for initial start-up . . . . . . . . . . . 10
2.2 Electrical connections . . . . . . . . . . . . . . . . . 10
2.3 Start-up (first pump-down cycle) . . . . . . . . . 11
2.4 The controls and their functions . . . . . . . . . 12
2.4.1 Overview of the controls and displays . . . . . 12
2.4.2 The mains switch . . . . . . . . . . . . . . . . . . . . 12
2.4.3 Controls on the control panel . . . . . . . . . . . 12
2.4.4 Controls on the hand unit . . . . . . . . . . . . . . 13
2.4.5 Displays on the hand unit . . . . . . . . . . . . . . 14
2.5 Equipment settings (menu structure) . . . . . . 15
2.5.1 Entry of equipment parameters . . . . . . . . . . 15
2.5.2 Password . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.5.3 Menu functions (overview) . . . . . . . . . . . . . . 16
2.5.4 Description of the individual menu functions 16
2.6 Equipment connections . . . . . . . . . . . . . . . . 27
2.6.1 RS 232 C interface (SERIAL) . . . . . . . . . . . 27
2.6.2 Chart recorder outputs (RECORDER) . . . . . 27
2.6.3 Control inputs and outputs (CONTROL) . . . 27
2.6.4 Connection for accessories (OPTION) . . . . . 28
2.7 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.7.1 Internal calibration . . . . . . . . . . . . . . . . . . . . 28
2.7.2 External calibration . . . . . . . . . . . . . . . . . . . 29
2.7.3 External calibration for sniffer applications . . 29
2.8 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . 31
3.1 LEYBOLD service . . . . . . . . . . . . . . . . . . . . 31
3.2 Maintenance plan . . . . . . . . . . . . . . . . . . . . 31
3.2.1 Opening the UL 200 . . . . . . . . . . . . . . . . . . 31
3.2.2 Exchanging the filter mats . . . . . . . . . . . . . . 32
3.2.3 Exchanging the oil . . . . . . . . . . . . . . . . . . . 32
3.2.4 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.2.5 Exchanging the fuses . . . . . . . . . . . . . . . . . 33
4 Messages . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.1 Equipment messages . . . . . . . . . . . . . . . . . 35
4.2 Warnings and error messages . . . . . . . . . . . 37
4.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2.2 Error messages . . . . . . . . . . . . . . . . . . . . . 37
4.2.3 List of all warnings and error messages . . . 38
5 Definition of terms . . . . . . . . . . . . . . . . . . 42
2TH 10.211/8.02 - 12/97

1.1 General Information
The UL 200 helium leak detector is supplied
ready for operation. Even so, we recommend
that you carefully read the Operating Instruc-
tions and the Technical Handbook so as to
ensure optimum operating conditions right
from the start.
This handbook contains important information on func-
tions, installation, start-up and operation of the UL 200.
Unpack the UL 200 helium leak detector immediately
after it has been received even if it is to be put into ope-
ration at some later date.
Examine the shipping container for any external dama-
ge.
Completely remove all packaging materials.
Note
Retain the shipping container and the packaging materi-
als in the event of possible complaints concerning any
damages.
Check that the UL 200 helium leak detector is complete
(see Section 1.4) and Carefully subject to a visual ins-
pection.
If any damage is discovered please immediately inform
the forwarding agent and the insurers. If it is required to
exchange the damaged part please contact our orders
department.
1.1.1 Purpose
The ULTRATEST UL 200 is a helium leak detector. This
instrument may be used to localise and quantify leaks in
test samples.
-when these have been evacuated first and are sprayed
with helium on the outside. For this it is required that a
vacuum connection is provided between the UL 200
and the test sample.
-In the case of small test samples, these may be eva-
cuated by the UL 200 alone (vacuum method); in the
case of larger volumes, the test samples must be eva-
cuated together with a further pump system (partial
flow vacuum method).
-when there is present in the test samples a helium
overpressure and when the test sample is searched
from the outside with a sniffer probe (sniffer method).
Caution The UL 200 must not be operated while
standing in water or when exposed to
drip water. The same applies to all other
kinds of liquids.
Caution Avoid contact of the UL 200 with bases,
acids and solvents as well as exposure
to extreme climatic conditions.
1.2 Technical Data
1.2.1 Physical Data
Operation of the UL 200 helium leak detector is - as a
rule - based on the counterflow principle.
Lowest detectable helium leak rate
Vacuum mode ≤5·10-11 mbar·l·s-1
Sniffer mode ≤1·10-7 mbar·l·s-1
Greatest helium leak rate which can be displayed
0.1 mbar·l·s-1
Measurement range 9 decades
Detectable masses 2, 3 and 4
Mass spectrometer 180 °sector field
Ion source 2 cathodes; iridium / yttrium
Max. inlet pressure (in measurement mode) 3 mbar
Equipment-specific processing time
time constant of the leak rate signal
(blanked off, 63 % of the final value) < 1 s
Pumping speed at the inlet S ≥1 l·s-1 FINE
S ≥0.6 l·s-1 GROSS
Temperature coefficient ≤1 % / °C (10 to 40 °C)
Test port DN 25 KF
Time until ready for operation < 3 minutes
1.2.2 Electrical Data
Mains voltage (fixed) 100 V ± 10 %; 50 / 60 Hz
110 - 120 V ± 10 %; 60 Hz
220 - 240 / 230 V ± 10 %; 50 / 60 Hz
Power consumption ≤350 W
Type of protection IP 30
Mains cord 2.5 m
3
TH 10.211/8.02 - 12/97
1 Description

1.2.3 Other Data
Noise level < 54 dBA
Valves solenoid
Dimensions (W x H x D) in mm 490 x 430 x 250
Weight 37 kg
Permissible ambient temperature
(during operation) 10 °C to 40 °C
Permissible storage temperature - 40 °C to 60 °C
Max. rel. humidity 80 % non-condensing
1.3 Equipment
1.3.1 Supplied Equipment
UL 200 helium leak detector, ready for operation.
Mains cord, 2.5 m long
Operating Instructions
- ULTRATEST UL 200 GA 10.211
- Technical Handbook TH 10.211
- Spare Parts List ET 10.211
- Interface Description UL 200 SB 10.211
- TRIVAC D 2,5 E GA 01.600
- Forms, Declaration of Contamination
Blank flange DN 25 KF
Quick clamping ring DN 25 KF
DN 25 KF gasket
DN 25 KF centering ring
1 set of fuses
1 set of filter mats
2 L-type screwed connections (hose connections)
1 hose nozzle
1.3.2 Accessories
Cat. No. / Ref. No.
Sniffer line for UL 200, 4 m 140 21 or 140 24
Retrofit calibrated leak 140 23
Extension cord for the hand unit, 8 m 140 22
Partial flow pump set 140 20; 140 25
140 26; 140 27; 140 28
QT 100 helium sniffer 155 94
Sniffer line for QT 100, 20 m long 155 76
Transport boy 140 97
Cart 200 140 93
Transport case 140 96
Set of connection plugs 200 28 782
PC software „LeakWare“ 140 90
4TH 10.211/8.02 - 12/97

1.4 Technical Description
The UL 200 is capable of detecting and quantifying heli-
um test gas flowing into a test sample having a leak by
means of a selective mass spectrometer. Its operation is
based on the counter flow principle, i.e. inflowing helium
diffuses against the gas flow being pumped by the tur-
bomolecular pump into the mass spectrometer whereas
heavier gases, water vapour in particular, are held back.
A cold trap using liquid nitrogen is thus not required.
The ULTRATEST UL 200 is composed of the following
principal subassemblies:
-a 180 °magnetic sector field mass spectrometer -the
detection system
- a high vacuum pump system
- a valve block for controlling the gas flow
-the corresponding electrical and electronic subassem-
blies for supplying power and for signal conditioning. A
detachable hand unit and a control panel on the instru-
ment itself belong to this category.
1.4.1 Forevacuum Pump
A TRIVAC D 2.5 E rotary vane pump in the UL 200 ser-
ves as the forevacuum pump (2/16). All data and further
information on this pump are given in the Operating
Instructions GA 01.600.
The backing pump generates the forepressure required
for operation of the turbomolecular pump.
In the vacuum mode the test sample is also evacuated,
whereas in the sniffer mode the necessary gas flow is
generated.
1.4.2 Turbomolecular Pump
ATURBOVACTMP 35 LS is used in the ULTRATEST UL
200.The turbomolecular pump generates the high vacu-
um necessary for operation of the mass spectrometer.
Heavier gases are evacuated owing to the high com-
pression, whereas the helium test gas is able to diffuse
upstream into the mass spectrometer.
This pump offers two special features:
a) Ahead of the turbomolecular stage (high pumping
speed) there is a screw-type stage which provides a
high compression.Thus the UL 200 may switch to
the measurement mode already at high intake pres-
sures.
b) The TMP 35 LS has a side connection.Thus the
high pumping speed may be utilised in the FINE
mode at the inlet of the leak detector.This consider-
ably reduces the response time of the leak detector.
(Response time = volume of the test sample / effec-
tive pumping speed for helium)
The compression capacity of the TMP and the pumping
speed of the forevacuum pump determine the sensitivity
of the entire arrangement.
1.4.3 Mass Spectrometer
The mass spectrometer, MS (2/7) is chiefly composed of
the ion source, the magnetic separator and the ion
collector (1/5).
The ion source ionizes neutral gas particles and genera-
tes from these an ion beam.The positively charged ions
are accelerated out of the ion source and then enter the
magnetic field. Here they are deflected along a circular
path, the radius of which depends and the mass-to-char-
ge ratio of the ions.Only the helium ions are able to meet
the separating conditions and arrive at the ion collector,
where their presence can be measured as a current by
an electrometer amplifier.
1.4.4 Ion Source
Electrons having an energy of 80 eV are used in the ion
source.
The electrons which are emitted by the hot cathode (1/1)
5
TH 10.211/8.02 - 12/97
Key to Fig. 1
1 Cathode 1
2 Anode
3 Cathode 2
4 Amplifier
5 Ion collector
6 Shield for ion collector
7 Suppressor
8 Magnetic field
9 Intermediate orifice
10 Extractor orifice
11 Guard ring
Fig. 1 Schematic diagram of the mass spectrometer

are attracted by the positively charged anode (1/2). But
they do not immediately impinge on the anode (1/2);
instead they oscillate to and fro several times until they
finally arrive at the filament of the anode (1/2).
On this path they ionize the gas atoms by impact.These
ions are extracted from the ion source by a ground-
connected extractor orifice (1/10) and enter the magne-
tic separation system.
In order to avoid deposits of polymerized hydrocarbons
(insulating layers which may impair sensitivity) the anode
is heated while the UL 200 runs up.
Due to the operating temperature of the ion source
(cathode heater), this is no longer required after the
instrument has run up and the anode heater is then swit-
ched off for this reason.
Cathodes (1/1) and (1/3) are made of iridium tape which
is coated with yttrium oxide. Due to this coating, the ope-
rating temperature of the iridium filaments is much lower
compared to tungsten filaments, and these offer excel-
lent resistant to burnout, imbrittlement, oxygen, water
vapour and hydrocarbons.
1.4.5 Separation System
A magnetic sector field (1/8) with 180 °deflection is used
as the separating system. Due to the inhomogeneous
magnetic field perpendicular to the ion beam, additional
focusing of the ions is attained in this direction (Z-focu-
sing) resulting in a high sensitivity.
Unwanted ions from other gases are kept away in additi-
on by means of the intermediate orifice (1/9).
1.4.6 Ion Collector
The ion collector (1/5) is composed of a tube-shaped
suppressor and the actual collecting plate.
The suppressor (1/7) carries a positive potential which is
slightly less than the anode potential. It is the purpose of
the suppressor to prevent scattered ions which have a
lower nominal energy from arriving at the collector. This
improves resolution at low detection rates.
The impinging ions are collected by the collecting plate
where they are neutralized. The corresponding current
flows into the connected amplifier.
1.4.7 Electrometer Amplifier
The electrometer amplifier amplifies the current which is
generated on the ion collector of the mass spectrometer.
Gain of this amplifier can be switched over in four stages.
The control assembly is responsible for the switching
over and processing of the analogue output signal. The
detection limit in the most sensitive range amounts to
approximately 1·10-15 A.
1.4.8 Mass Spectrometer Supply
The subassembly generates all the voltages and cur-
rents required for operation of the mass spectrometer:
- anode heating voltage
- cathode heating voltage
- anode voltage
- suppressor voltage
Errors in the mass spectrometer are detected and sig-
nalled to the control assembly. The control assembly
monitors the mass spectrometer supply.
1.4.9 Control
The control assembly is the central assembly of the leak
detector’s electronics. All other subassemblies are con-
trolled and monitored by this assembly. The micropro-
cessor which is located here is thus continuously infor-
med about the status of the entire leak detector and can
respond accordingly. In order to accept commands from
the operator and to output measured values and messa-
ges, the control subassembly is linked to the operating
and display subassembly.
1.4.10 Operation and Remote Control
These two subassemblies are used to communicate with
the operator. They accept commands from the key pad
and output measurement results and messages via the
display components.
6TH 10.211/8.02 - 12/97

1.5 Description of the
Functions of the UL 200
The mass spectrometer (2/7) only operates under high
vacuum conditions, i.e. the pressure here must always
remain below 10-3 mbar.This vacuum is generated by the
turbomolecular pump (2/6) with the support of the rotary
vane pump (2/16). Except during the evacuation phase,
the valve (2/3) between these two pumps always remains
open so that this is ensured. In this state the UL 200
reverts to the standby mode; after completion of run-up,
for example. All other valves are then closed. The pres-
sure pV between the two pumps is measured with a Pira-
ni gauge (2/4) and this pressure lies in the range bet-
ween 3 to 10-3 mbar while in the measurement mode.
This pressure must not exceed a value of 3 mbar as
otherwise the turbomolecular pump will not be capable of
maintaining the vacuum in the mass spectrometer.
1.5.1 Vacuum Method
For the purpose of leak detection on a test sample (vacu-
um method), the sample has to be evacuated so that
helium which is sprayed on to the outside, can enter
through any leaks due to the pressure differential for
detection by the leak detector.
The test sample is evacuated - START push-button (5/3)
- by the rotary vane vacuum pump (2/16). In the case of
larger test samples an additional external partial flow
pump (2/15) with a corresponding linking valve (2/12)
may be connected in parallel as required.
Inlet valve (2/14) is opened so that the evacuation may
take place.At the same time valve (2/3) is closed in order
to prevent an unacceptable pressure increase in the
mass spectrometer.
In this context (valve (2/3) closed) the turbomolecular
pump is operated without being supported by the rotary
vane pump. Since generally no gas is pumped out of the
mass spectrometer, pVremains constant or increases
only slowly.
The condition for the evacuation process described here
is maintained until the inlet pressure pE(2/13) has drop-
ped ≤3 mbar. Now the valves (2/5) and (2/3) are opened
and (2/14) is closed. Possibly present helium may now
flow upstream against the pumping direction of the tur-
bomolecular pump (2/6) into the mass spectrometer
where it is detected. This measurement mode is called
GROSS. In this mode, leak rates down to 10-9 mbar·l·s-1
can be detected.
Since the rotary vane vacuum pump (2/16) continues to
evacuate the test sample via valves (2/3) and (2/5) the
inlet pressure pEwill continue to drop. When the pressu-
re drops below pE< 0.2 mbar, the UL 200 will switch to
the FINE mode, i.e. valve (2/5) closes and valve (2/8)
opens so that the gas flow enters the turbomolecular
pump (2/6) at the side.This offers two advantages:
a) A part of the high pumping speed of the turbomole-
cular pump remains available for further evacuation of
the test sample.The response time of the leak detec-
tor is reduced (response time is inversely proportional
to pumping speed).
b) The advantages offered by the counterflow principle
can still be utilized.
In the FINE mode the full sensitivity of the UL 200 is rea-
ched.
When the leak detection process is stopped - STOP
push-button (5/2) - all valves except valve (2/3) are clo-
sed.
Valve (2/10) is opened during venting.
1.5.2 Partial Flow Method
In the partial flow mode the test sample is additionally
evacuated by an auxiliary pump. Using the optional par-
tial flow pump set (see Chapter 1.3.2) offers to the user
the following advantages:
- faster response
- entry into the measure mode already at an inlet pres-
sure of the 1000 mbar
- faster venting of large test objects
1.5.3 Sniffer Mode
The UL 200 may simply be converted into a sniffer leak
detector via two rugged sniffer lines (Cat. No. 140 21 or
140 24).
For this the KF flange of the sniffer line is connected to
the inlet flange (3/2) and the sniffer mode is selected
through menu item 2 (see Chapter 2.5.4). After pressing
START, the inlet valve (2/14) opens. The sniffer lines
have been designed in such a way that the UL 200 is
operated in the FINE mode (as described in Chapter
1.5.1).
A calibration according to Chapter 2.7.3 is recommen-
ded.
In the measurement mode the helium present in the
ambient air is now indicated as the leak rate (about
2·10-6 mbar·l·s-1). Smaller leaks may be detected by
pressing the ZERO push-button (Chapter 2.4.4).
7
TH 10.211/8.02 - 12/97

8TH 10.211/8.02 - 12/97
2 Operation
Fig. 3 Instrument views
Key to Fig. 3
1 Hand unit
2 Test connection
3 Electronics cover
4 VENT input
5 Connection for exhaust line
6 Gas ballast connection
7 Mains switch with mains fuses
8 Mechanical cover
9 Openings for removal of the
mechanical cover
10 RS 232 C interface (SERIAL)
11 Chart recorder output (RECOR)
12 Control inputs and outputs
(CONTROL)
13 Connection for the
Accessories (OPTION)
4
5
6
7
8
9
1
2
3
1
2
10
12
11
13
Mechanical side Electronics side
MS
5
6
8
9
1
2
3
4
12
11
13
15
14
16
10
7
Key to Fig. 2
1 Calibrated leak (optional)
2 Valve for the calibrated leak (V 7)
3 Inlet valve (V 2.a)
4 Pirani gauge pV
5 Inlet valve (V 2.b)
6 Turbomolecular pump (TMP)
7 Mass spectrometer
8 Inlet valve (V 4)
9 Partial flow pump set (optional)
10 Venting valve (V 3)
11 Connection flange
12 External partial flow valve (V 8) (optional)
13 Pirani gauge pE
14 Evacuation valve (V 1)
15 External partial flow pump (optional)
16 Forevacuum pump
Fig. 2 Vacuum diagram

9
TH 10.211/8.02 - 12/97
Fig. 4 Control panel
Key to Fig. 4
1 LED for trigger 1
2 LCD display
3 LED for trigger 2
4 LED for trigger 3
5 SCROLL push-button
6 VALUE push-button
7 MENU push-button
8 ENTER push-button
9 CAL push-button
10 CLEAR push-button
MANUAL
SERVICE
CAL MENUE
ENTER
CLEAR
TRIG 1 TRIG 3
TRIG 2 SCROLL VALUE
1235 4 6
11 MANUAL push-button
12 SERVICE push-button
13 Vacuum diagram (simplified)
L 1 to L 9 light emitting diodes
7
10 9 8 111213
L3
L2
L1
L4 MS
L6
L5 L8
L7
L9
Key to Fig. 5
1 ZERO push-button
2 STOP / VENT push-button
3 START push-button
4 LED-Bargraph display
5 Underflow display
(under range)
6 Leak rate scale
7 Overflow display
(over range)
8 Scale for the pressure in
the test sample
9 Exponent
10 MANUAL LED
11 LOCK LED
12 Acoustic signal quieter
13 Acoustic signal louder
START
MANUAL
LOCK
ZERO
STOP/VENT
mbarl/s
10
9
8
7
6
5
4
3
2
1
0,9
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
mbar
400
100
10
1
0,1
-8 9
7
6
8
3
2
4
5
12
11
1
10
13
Fig. 5 Hand unit

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

TH 10.211/8.02 - 12/97 11
No.
1
--
-- --
----
--
--
--
-- --
--
2
3
4
5
6
7
9
10
11
12
13
14
8
Activity Response Display on the control panel Fig. 4 Display on the hand unit Fig. 5
Check the mains voltage and
connect the mains cable;
Set the mains switch (3/7) to
the „1“ position
Press the START push-button
(5/3) briefly
--
-- --
--
--
----
Press the STOP push-button
(5/2) for over 1.5 s
Open the test port (3/2)
Disconnect the test sample
Connect the test sample
Press the START push-button
(5/3) briefly
Press the STOP push-button
(5/2) for over 1.5 s
Spray the test sample with
Indication of operational rea-
diness by an acoustic signal.
The first measurement read-
out is obtained at an inlet
pressure for pE< 3 mbar
(GROSS mode).)
When the inlet pressure
pE< 0.2 mbar the instrument
changes to the FINE mode.
Starting of the stopping pro-
cess.
Starting of the venting pro-
cess.
Display of the leak rate
The first measurement read-
out is obtained at an inlet
pressure for pE< 3 mbar
(GROSS mode).)
When the inlet pressure
pE< 0.2 mbar the instrument
changes to the FINE mode.
Starting of the measurement
process.
Pumpdown of the dead volu-
me at the inlet.
Initiation of the measurement
process. Pumpdown of the
dead volume at the inlet.
Starting of the stopping pro-
cess.
Starting of the venting pro-
Running up of the forevacu-
um pump and the turbomole-
cular pump.Pumpdown of the
detection system. The auto-
matic self test starts. The
emission is switched on.
„LEYBOLD INFICON“
„UL 200 Version x.x“
Light emitting diode L2 (4/13) is on.
Light emitting diode L3 (4/13) flashes.
„Running Up TMP: 1050 Hz“
„Emission OFF ==> ON“
Light emitting diode L4 (4/13) flashes.
„Standby“
Light emitting diodes L2, L3 and L4
(4/13) are on.
„LR = 3.1E-09 PE = 1.5 E+0“
Light emitting diodes L2, L3, L4 and
L9 are on.
Light emitting diode L9 is off.
Light emitting diodes L2, L3, L4 and
L5 are on.
„Vent“
Light emitting diode L5 is off.
Light emitting diode L7 is on.
Light emitting diodes L2, L3 and
L4 are on.
„Vent“
Light emitting diode L5 is off.
Light emitting diode L7 is on.
Light emitting diodes L2, L3 and L4
are on.
„LR = 5.1 E-07 PE = 1.5 E-1
„LR = 3.1E-09 PE = 1.5 E+0“
Light emitting diodes L2, L3, L4 and
L9 are on.
Light emitting diode L9 is off.
Light emitting diodes L2, L3, L4 and
L5 are on.
Light emitting diode L7 is off.
„Evacuation PE = 3.5 E+1 “
Light emitting diodes L3 and L4 are
on.
Light emitting diode L2 is off.
Light emitting diode L9 is on.
„Evacuation PE = 3.5+1 “
Light emitting diodes L3 and L4
are on.
Light emitting diode L2 is off.
Light emitting diode L9 is on.
All display components are on.
ROM and RAM test.
Decimal point (5/9) flashes.
Test of the display components.
TMP speed is indicated on the
bargraph display (5/4).
Display of helium background or
the detection limit on the bar-
graph display (5/4) and exponent
(5/9).
START display (5/3) is on;
Display of leak rate (5/6) on the
bargraph display (5/4) and expo-
nent (5/9).
--
Display of helium background on
the bargraph display (5/4) and
exponent (5/9);
Vent LED (5/2) is on.
Display of helium background on
the bargraph display (5/4) and
exponent (5/9);
Vent LED (5/2) is on.
START display (5/3) is on;
Display of leak rate (5/6) on the
bargraph display (5/4) and expo-
nent (5/9).
START display (5/3) flashes;
Display of inlet pressure (5/8) on
the bargraph display (5/4).
START display (5/3) flashes;
The pressure in the test sample
(5/8) is indicated on the bar
graph display (5/4).
Blank off the connection flan-
ge (3/2)
Leak rate on bargraph display
(5/4) and exponent (5/9).
2.3 Start-Up (First Pump-Down Cycle)

2.4 The Controls and their
Functions
2.4.1 Overview of the Controls and
Displays
Except for the mains switch, all controls and displays are
located on the control panel (Fig.4) and on the hand unit
(Fig. 5)
The hand unit is detachable and linked to the instrument
via a connecting cable. Magnets have been built into the
hand unit, so that it may easily be attached to any
magnetizable surface. If required, the connection cable
of the hand unit leading to the UL 200 can be extended
(extension cable Cat. No. 140 22).
The controls and displays are shown in Fig. 5.
The control panel on the UL 200 (Fig. 4) also contains
the corresponding menu and function push-buttons.
These are described in Chapter 2.4.3.
2.4.2 The Mains Switch
Operation of the mains switch (3/7) switches the entire
instrument on or off.
2.4.3 Controls on the Control Panel
MANUAL push-button
Via the MANUAL push-button (4/11) it is possible to
switch the manual ranging feature on and off. Once this
function has been selected it is then possible to enter the
display range for the leak rates (exponent) through the
VALUE push-button (4/6).
When pressing the MANUAL push-button (4/11) the fol-
lowing happens:
The LED in the MANUAL push-button (4/11) and the
MANUAL LED (5/8) on the hand unit come on.
The exponent (5/9) on the hand unit is frozen.When the
leak rate changes it is only required to observe the bar-
graph display (5/4).
In case of a range overflow, the upper arrow (5/7) at the
bargraph on the hand unit comes on and in the case of
range underflow, the lower arrow (5/5) at the bargraph on
the hand unit comes on.
The range of the exponent displayed by the LCD display
(4/2) is also restricted.The same applies to the dynamic
range of the chart recorder signal at the RECORDER
output (3/11) (see description for menu item 13). The
analogue voltage at pin 4 is constant. Only the signal at
pin 1 may be used for logging of the change in the leak
rate.
Note
The trigger thresholds (menu item 1) should fall into the
range of the bargraph display. Trigger levels outside the
range of the bargraph display are not usable in the case
of manual range selection.
The LED in the MANUAL push-button is not on and the
MANUAL status indicator (5/10) is off:
The range is selected automatically. The full measu-
rement range is available.
SERVICE push-button
Pressing of the SERVICE push-button (4/12) activates or
deactivates the service menu (see Chapter 2.5). When
the service menu has been selected, the status indica-
tors (4/7) and (4/12) come on. If the automatic functions
have been switched off in the service menu (service
menu item 70) the UL 200 will be restarted after the ser-
vice menu has been exited, i.e. all monitoring and auto-
matic functions are switched on again. After this, the
UL 200 will be running in the Standby mode.
CAL push-button
Pressing the CAL push-button (4/9) starts a calibration
process which may be run either in connection with an
internal calibrated leak (optional) or an external calibra-
ted leak (see Chapter Calibration).The UL 200 will then
control everything else on its own and will inform the
operator via the LCD display (4/2). The UL 200 autono-
mously decides whether to use the internal calibrated
leak or external calibrated leak which is connected to the
test port (3/2), depending on the instrument mode at the
time of the key-press.
Pressing of the CAL push-button in the measurement
mode: external calibration.
Pressing the CAL push-button in the Standby/Vent
mode: runs an internal calibration, provided
an internal calibrated leak has been
built-in.
The process differs for the different operating modes. If
the calibration process is to be performed with an exter-
nal calibrated leak, then the calibrated leak must be
connected to the inlet or the test sample before operating
the push-button. Switchover between external and inter-
nal calibrated leak is possible by operating the START
(5/3) and STOP / VENT (5/2) push-buttons.
The calibration process may be cancelled by pressing
the CAL push-button (4/9) or the CLEAR push-button
(4/10).
LED in the push-button is on: calibration process is
active.
LED in the push-button is off:calibration process is inac-
tive.
12 TH 10.211/8.02 - 12/97

TH 10.211/8.02 - 12/97 13
CLEAR push-button
The CLEAR push-button (4/10) is used to cancel pro-
cesses and functions which have been started. Moreo-
ver, this push-button may be used to acknowledge war-
nings and error messages.
Also this push-button may be used to reset a value which
has been changed through VALUE in a menu.
ENTER push-button
The ENTER push-button (4/8) is used to acknowledge
and accept parameters which have been set up on the
UL 200.
If several parameters can be changed in a single menu
line, pressing of this push-button advances to the next
parameter.
When the parameter is being accepted, the message
„Updating Parameter“ is displayed briefly or the next
parameter is indicated.
MENU push-button
The MENU push-button (4/7) permits many entries
though which instrument settings can be made or for
running of special instrument functions. For this also
refer to Chapter 2.5.
Pressing the MENU push-button (4/7) lets the instrument
enter the menu mode and this mode can be exited by
pressing the MENU push-button once more.
After pressing the MENU push-button, that menu line
which was active upon leaving the menu mode before is
displayed.The desired menu line is selected by pressing
the SCROLL push-button (4/5).
Within a menu line, the settings or values are changed
by pressing the VALUE push-button (4/6).
Each change which is made within a menu line must be
acknowledged by pressing the ENTER push-button
(4/8). Otherwise the changed value will not be accepted
by the UL 200.
LED is the push-button is on: menu mode is active.
LED in the push-button is off: menu mode is inactive.
SCROLL push-button
The SCROLL push-button (4/5) permits the selection of
a menu items. Also refer to Chapter 2.5.1.
VALUE push-button
With the aid of the VALUE push-button (4/6) it is possi-
ble to change settings or values. Only the parameters
which flash can be changed by operating the VALUE
push-button. Also refer to Chapter 2.5.1.
2.4.4 Controls on the Hand Unit
An overview of the controls on the hand unit is given in
Fig. 5.
START push-button
Based on the operating modes Standby orVent of the UL
200, the START push-button (5/3) is used to start the
measurement mode by evacuating the connected test
sample. Here the UL 200 will operate either with auto-
matic ranging or it will only display the measured values
within a fixed range which has been selected by the ope-
rator (Manual).
The status of measurement readiness is indicated to the
operator by a green LED at the START push-button.
During the pumpdown phase this LED flashes. As soon
as the status of measurement readiness has been rea-
ched, this LED stays on continuously.
When pressing the START push-button in the Standby
mode, the internal Zero level is taken over anew, provi-
ded the UL 200 has been running in the Standby or Vent
status for at least 10 s.
STOP / VENT push-button
The STOP / VENT push-button (5/2) has two different
functions, depending on how long it is pressed:
STOP function
Based on the measurement mode of the UL 200, a
brief press of the STOP push-button (5/2) interrupts
the evacuation process of the test sample and the
measurement mode is interrupted.The duration of this
key press must be no longer than the time which is
defined in menu item 22 (see Chapter 2.5.4). The
default time is 1.5 s. The UL 200 will return to the
Standby mode, i.e. all valves except valve V2a (2/3)
are closed. This condition is indicated to the operator
by the green LED in the START push-button (5/3)
which is turned off.
After pressing the STOP / VENT push-button (5/2) the
LCD display (4/2) will indicate the message „Standby“.
VENT function
When pressing the STOP /VENT push-button (5/2) for
a period of time which exceeds the time as defined in
menu item 22 (1.5 s default), the connected test sam-
ple is vented as soon as this time has elapsed.This is
done by opening of the venting valve V3 (2/10). This
operating mode is indicated to the operator by the
green LED in the STOP / VENT push-button which
comes on.
The venting valve may be closed again by pressing
the STOP / VENT push-button briefly once more. The
UL 200 will then return to the Standby mode. The
„VENT“ display is turned off.
In the Standby mode and after a transitional period of

10 s, the helium background of the UL 200 is conti-
nuously monitored.This helium background may be indi-
cated when selecting menu function „21:System BG dis-
play on“. The helium background determination process
takes up to 10 s depending on the sensitivity setting.The
helium background serves as the Zero level for the sub-
sequent measurements.
When the START push-button (5/3) is pressed before
this process has been completed, the Zero determinati-
on process is cancelled and the previous Zero value will
be used once more.
The automatic gas ballast control is also monitored
during the Standby mode.The monitoring facility to con-
trol the gas ballast valve will start 30 s after the UL 200
has returned to the Standby mode (see description for
menu item 3).
ZERO push-button
A constant leak rate reading may be suppressed by
pressing the ZERO push-button (5/1), i.e. a constant
helium background within a test sample. This push-but-
ton is only active in the measurement mode.
The exponent on the hand unit is retained in the case of
„Zero“ when the leak rate display always remains at the
upper decade of the bargraph display. If the leak rate is
indicated in the lower decade, the exponent is decre-
mented by one in the case of „Zero“.Thus the displayed
leak rate can always be suppressed by at least one
decade so as to increase resolution.
Example
A leak rate of 4.1·10-8 mbar·l·s-1 can be displayed in two
ways on the hand unit:
a) The exponent indicates -8 and the narrow part of the
bargraph display is fully on and the wider section is
on up to number 4.
b) The exponent indicates -7 and only the lower narrow
section of the bargraph display is on up to number
0.4.
In both cases the exponent -8 and the bargraph display
is dark after pressing of ZERO.
After the ZERO push-button (5/1) has been pressed, the
currently indicated leak rate is stored as the „Zero level“
without changing the internal Zero level which has been
determined by the Zero determination process.
Only values above this Zero level are indicated so that
resolution of the displayed measurement signal is impro-
ved.
Note
It is not possible to reduce the detection limit of the
instrument by pressing the ZERO push-button (5/1).
The ZERO function is cancelled by pressing the ZERO
push-button once more. The Zero function is also can-
celled automatically as soon as the STOP / VENT push-
button (5/2) is pressed.
The ZERO function has an effect on all output devices
such as remote control, LCD display, chart recorder, trig-
gers and RS 232 interface.
Should the helium background which has been suppres-
sed with the aid of the ZERO push-button change in such
way that no measured value is indicated for over
t = 5 s, then the Zero level is readjusted automatically.
Acoustic signal
The acoustic signal is used to indicate the leak rate. An
acoustic signal is also generated in the case of error
messages. For details please refer to the description of
menu item 18 in Chapter 2.5.4 and in Chapter 4.2.
The volume of the acoustic signal can be increased by
operating the push-button (5/13) to the left of the louds-
peaker. With the push-button (5/12) to the right of the
loudspeaker the volume of the acoustic signal may be
reduced.
2.4.5 Displays on the Hand Unit
Measurement range display
Here the leak rate is indicated by way of a bar (5/4). In
case of a range overflow, the upper arrow (5/7) at the
bargraph on the hand unit comes on and in the case of
range underflow, the lower arrow (5/5) at the bargraph on
the hand unit comes on.
The corresponding exponent (5/9) is indicated at the top
to the right of the bargraph display.
Depending on the kind of hand unit which is supplied, the
measured leak rate (bargraph display together with the
exponent display) is indicated in mbar·l·s-1 or Pa m3·s-1.
Two leak rate decades can be indicated by the bargraph
display (5/4).The panel for the upper leak rate decade
(1 ... 10) is twice as wide as that for the lower decade
(0.1 ... 1).
LOCK LED
The LOCK LED (5/11) comes on when the hand unit has
been locked. For details on this please refer to the
description for the menu line in Chapter 2.5.4.
MANUAL LED
The MANUAL LED (5/10) comes on when the manual
ranging mode has been selected by pressing the
MANUAL push-button (4/11) on the control panel.
14 TH 10.211/8.02 - 12/97

2.5 Equipment Settings
(Menu Structure)
Via the menu, the UL 200 may be adapted to prevailing
ambient and operating conditions in a flexible manner. In
order to provide a better overview, the menu has been
divided into three parts. The individual menu items are
numbered consecutively.
The first part - the basic menu - contains functions
(No. 1 ... 9) which can be changed frequently and quick-
ly when running a particular application.The second part
- the extended menu - (No. 10 ... 49) permits access to
those parameters which may have to be changed only
once during initial start-up or in the case of changed
ambient conditions, i.e. parameters which have to be
changed only rarely. The third part - the service menu -
(No.50 ...99) is used for servicing the UL 200 or for assi-
stance during troubleshooting.
For reasons of clarity, only the basic menu is generally
accessible. The extended menu can be accessed after
entering a password in menu item No. 9.
The service menu can be accessed by pressing the Ser-
vice push-button (4/12). When only wanting to display
internal parameters of the instrument, the scroll push-
button may be operated to move between the menu
items of the service menu without necessarily having to
enter the second password.However, if modifications are
to be made here or for access to further test modes, the
entry of the correct second password is required (with
the exception of menu item 81). This password will only
be made available after suitable training by Leybold.
2.5.1 Entry of Equipment Parameters
Pressing the MENU push-button (4/7) enters the menu
mode. Refer also to Chapter 2.4.3.
The menu items are selected by operating the SCROLL
push-button (4/5).The individual menu items are numbe-
red consecutively. Pressing the upper symbol of the
push-button decrements the menu item number by 1 (i.e.
visually one passes through the menu table to the top)
and operation of the lower symbol of the push-button
increments the menu item level by one.When arriving at
the end of the menu items, menu item „1“ is then selec-
ted automatically.
Those parameters which can be modified within a menu
item are displayed flashing. At first the currently valid
value of the parameter is displayed. The corresponding
values may then be changed through the VALUE push-
button (4/6). Each value which has been changed must
then be acknowledged by operating the ENTER push-
button (4/8) so that the UL 200 accepts and stores the
newly changed value. At the same time, the next para-
meter which can be changed is selected or the message
„Updating Parameter“ is displayed.
Pressing the MENU push-button (4/7) once more exits
the menu mode.
All parameters which are essential for proper operation
remain stored when the instrument is disconnected from
the mains.
A detailed example describing the way in which a para-
meter is changed is given in Chapter 2.5.4 under
„01:Trigger“.
Note
If the message „Keyboard locked“ is displayed when try-
ing to change a parameter, this means that access to the
keyboard has been restricted. At this moment further
entries can not be made. The keyboard must be
unlocked first. For this refer to menu item „14: Control
by“.
2.5.2 Password
In menu item 09 the operator is asked for the entry of a
password in order to be able to access the further menu
items (10 to 49).
The default password as entered in the factory is 0013.
Note
The password may be changed by the operator at any
time.The password should be kept at a secure place.
Entry of the password
This entry is performed digit by digit through the VALUE
push-button (4/6) and the ENTER push-button (4/8).
When selecting menu item 09 for the first time, the mes-
sage „locked“ will be displayed flashing to the right.
Pressing the VALUE push-button (4/6) lets the first digit
of the password which is to be changed, flash. Pressing
this push-button once more increments or decrements
the displayed number starting at „0“. Acknowledge the
desired number by operating the ENTER push-button
(4/8). As soon as this has been done, the next digit is
shown flashing. This number too, is changed by opera-
ting the VALUE push-button and acknowledged by ope-
rating the ENTER push-button.
All four digits are entered in this manner.
After having operated the ENTER push-button (4/8) for
the fourth time, the check starts. The message „Pas-
sword OK“ or „Password failed“ will appear for 2 se-
conds. In the case of an incorrect password, „locked“ will
be displayed once more. In the case of the right pass-
word the message „opened“ will appear.
Access to the protected functions remains possible until
the password is changed. Access to protected functions
remains possible even if the instrument has been dis-
connected from the mains in the mean time.
15
TH 10.211/8.02 - 12/97

Caution This type of locking will not protect the
instrument against a fully intentional act
of sabotage.
2.5.3 Menu Functions (Overview)
All menu functions of the UL 200 are described briefly in
the following list. For detailed information on each menu
item please refer to Chapter 2.5.4.
Display example (4/2) Brief description
––––––––––––––––––––––––––––––––––––––––––––
Basic menu:
01:Trigger 1 3.0E+05 Set leak rate trigger values
02:Mode Vacuum Select leak detection mode (vacuum,
partial flow or sniffer leak detection)
03:Gas Ballast closed Remove helium background with the
gas ballast facility
04:Test <enter> Check the measurement signal for
helium
09:Password 1 locked Enter password for access to the
extended menu
Extended menu:
10:EVAC Time 1 30s Monitoring of gross leaks
11:Sensitivity normal Select sensitivity
12:Display LR + PE Select information which is to be dis-
played on the LCD (4/2)
13:Recorder LR Select chart recorder function (3/11)
14:Control by Keyboard 1 Select control means
(START / STOP / VENT)
15:RS232 Baud rate 9600 SERIAL connection (3/10), setting up
of parameters
16:Relay Mode 1 Definition of the function output
18:Alarm Trigger off Select acoustic warning
19:LCD Contrast 8 Change contrast for the LCD text
display line (4/2)
21:System BG display off Display / suppress helium background
during Standby
22:Vent Delay 1.5s Set venting delay time
23:System integration off Switch systems leak detection mode
on / off
24:Request for CAL off Automatic request for calibration
on / off
25:Mass 4 Select mass
26:Date 09.Apr.96 Set date and time
27:Language english Language select
28:Power Frequency 50Hz Set mains frequency
29:Pumping Speed 25 m3h-1 Entry of the pumping speed for the
partial flow pump.
30:Cal Leak 6.9E-7 mbar·l·s-1 Entry of the value of the calibrated
leak (internal)
31:Only GROSS off Locks the FINE mode
Display example (4/2) Brief description
––––––––––––––––––––––––––––––––––––––––––––
32:ZERO-time 1 s Entry of time constant for sliding Zero
33:QUICK-Pump time Entry of time defining sequences in
partial flow mode
49:Change Password 1 ? Change password 1
Service menu:
50:Password 2 locked Permit changes in the service menu
51:2.4 14000 D970000000 Display software version number, cata-
logue number and serial number
52:01 E53 03.07.96 13:00 List error log
53:Status to RS232 <Enter> Output status report through RS 232
54:Scan To Rec <Enter> Output mass spectrum
55:Value PE 1.2E+2 mbar Display (internal) measurement quan-
tities
56:Cycles V1 0012354 Display valve cycle counter
57:Operat.Time 111111h Operating hours counter
58:Task 00.00.00 Display process status
59:Offset 00.000V Display characteristic quantities for
leak rate calculations
70:Automatic on Switch automatic functions on / off
71:Valve Supply Auto Select valve supply voltage
72: 2a V1 Display valve status
73:Emission On Switch emission on / off
74:Anode M4 462V Run manual mass alignment
75:Amp Emi 500G 0.0035V Display preamplifier voltage
76:Gain A 16 0.087V Display A/D converter voltage
77:Cathode 1 Select cathode
78:Unit mbarl/s Select unit of measurement
79:Default Reset <enter> Reset parameters to default
82:Cal Leak Factor 3.39 Factor for the calibrated leak (internal)
90:Amp-Test <enter> Preamplifier test
91:Burn In On <enter> Burn-in test
92:Adjust Resistor Auxiliary alignment functions
99:Change Password 2 ? Change password 2
Via menu item 14 it is possible to lock the keyboard.This
ensures that parameters of menu items 01 to 08 can not
be changed.
2.5.4 Description of the Individual
Menu Functions
The individual menu items are described in the following.
The number and the general term of the menu item are
printed in bold face, followed by the status of the text line
as set up in the factory (default status).
01:Trigger 1 3.0E+05 Set leak rate trigger values
Here three trigger threshold levels can be entered inde-
pendently of each other. The two-digit factor and the
16 TH 10.211/8.02 - 12/97

exponent may be modified separately by operating the
VALUE push-button (4/6).
As soon as the leak rate drops below one of these thres-
holds, the corresponding LED (4/1), (4/2) or (4/3) will
come on. At the same time, the corresponding relay
contacts at the „CONTROL connection“ (3/12) are swit-
ched.
Changeover relay contacts at CONTROL (3/12):
Leak rate exceeds the Leak rate drops below
trigger threshold level, the threshold level,
relay inactive relay active
————————————————————————
Trigger 1
Pins 5 and 6 Pins 5 and 6
are not linked. are linked.
Pin 5 is linked Pin 5 is not linked
to pin 7. to pin 7.
Trigger 2
Pins 8 and 9 Pins 8 and 9
are not linked. are linked.
Pin 8 is linked Pin 8 is not linked
to pin 10. to pin 10.
Trigger 3
Pins 11 and 12 Pins 11 and 12
are not linked. are linked.
Pin 11 is linked Pin 12 is not linked
to pin 13. to pin 13.
When the measurement mode is not active, the three
triggers are set to the inactive state.
The three trigger also influence the automatic control of
the gas ballast (see explanations for menu item 3).
Trigger 1 causes sounding of the acoustic warning signal
provided „Alarm trigger ON“ has been selected in menu
item 18 (see explanations for menu item 18).
If the relay mode 3 is selected in menu item 16, only the
treshold values 1 and 2 are availabe.
Note
In the case of manual ranging (MANUAL push-button
(4/11)) only trigger values which fall within the bargraph
display range can be detected.
The trigger threshold level for Trigger 1 is adjusted
as follows:
Press MENU push-button (4/7).
Pressing the upper (∧) or the lower ( ∨) symbol on the
SCROLL push-button (4/5) selects the desired menu
item 01.The display will indicate the following, for exam-
ple:
01:Trigger 1 2.5E-10
Note
The flashing 1 indicates that trigger threshold 1 has been
selected. The currently stored trigger threshold level is
indicated to the right.
By pressing theVALUE push-button (4/6) one may select
the desired trigger 1, 2 or 3.
If it is required to change the corresponding trigger level
(numerical value), then you must press the ENTER
push-button (4/8).
If the message „Keyboard locked“ is displayed when try-
ing to change a parameter, this means that access to the
keyboard has been restricted. The parameters for this
trigger can not be changed in such a case.The keyboard
may be unlocked by selecting menu item 14. Otherwise
the display will indicate:
01:Trigger 1 2.5E-10
The factor (2.5) flashes and can be changed through the
VALUE push-button as required. Acknowledge the chan-
ge by pressing the ENTER push-button.The display will
indicate the following, for example:
01:Trigger 1 4.3E-10
The exponent (-10) flashes and can be changed in the
same way as described above. Pressing of the ENTER
push-button acknowledges the changed exponent. Then
display will then display the newly entered trigger thres-
hold level.
01:Trigger 1 4.3E-9
The trigger threshold levels for triggers 2 and 3 may be
changed in the same way.
02: Mode Vacuum Select leak detection mode
(vacuum, partial flow or sniffer
leak detection)
Vacuum stands for vacuum leak detection mode. Refer
to Operating Instructions GA 10.211, Chapter „Vacuum
leak detection“ for more information.
Sniff stands for sniffer leak detection. Here two different
sniffing modes may be selected:
NORMAL: for the standard sniffer mode when using the
sniffer line for the UL 200 (Cat. No. 140 21 or
140 24). These sniffer lines are particularly
well suited for especially sensitive measu-
rements and offer a short response time.
QT for the Quicktest sniffer. Sniffer leak detection
in connection with the Quicktest QT 100
(Cat. No. 155 94) sniffer. This sniffer is parti-
cularly well suited in the case of long sniffer
lines (5; 20; 50 m).
Part.flow for connection of an external LEYBOLD parti-
al flow pump set (see Chapter 1.3.2). Here two partial
flow modes may be selected.
17
TH 10.211/8.02 - 12/97

TH 10.211/8.02 - 12/97
Normal: Standard partial flow operating mode
Oil-free Avoids possibly occurring backstreaming of
oil vapour from the partial flow pump.
Note
Switch off the FINE MODE lock (menu item 31) „Only
GROSS mode off“.
03: Gas ballast closed Remove helium background
with the gas ballast facility
The gas ballast is employed to reduce a helium back-
ground in the UL 200 which is too high.For this, the built
in gas ballast valve of the forevacuum pump must be
opened in the Standby mode („Gas ballast OPEN“).
After 20 minutes the valve closes automatically. But the
gas ballast valve may also be closed manually by selec-
ting „Gas ballast CLOSED“.
The gas ballast valve will also closed after having selec-
ted „START“ (start of the measurement process).
The gas ballast valve may also be opened automatically.
This is done in the setting „Gas ballast AUTO“. Here the
internal helium background is monitored for the first time
after 30 s have elapsed in the Standby mode.If a helium
background in excess of 1/10th of the entered trigger
level for triggers 1, 2 or 3 is detected, the gas ballast
valve on the forevacuum pump will open automatically.
The gas ballast valve also opens automatically when the
helium signal is so great that measurements in the most
sensitive range are not possible.
(Q ~ 1E-6 mbar·l·s-1)
The internal helium background can be displayed in the
Standby mode through the function „21: System BG dis-
play“.
04:Test <enter> Check the measurement signal
for helium
In this mode, the UL 200 checks whether or not the sig-
nal is generated by helium or by a high water vapour
background, for example. For this, tuning of the mass
spectrometer in the UL 200 is briefly shifted by 1/2 of a
mass unit, i.e. it is adjusted to the masses 3.5 amu and
4.5 amu. The corresponding intensities which are then
measured must reduce by at least 50 % compared to the
measurement signal for mass 4.
The message „Test OK“ indicates that the measurement
signal is being caused by helium.
The message „Test failed“ means that there is no clear
peak on mass 4.
Possible causes:
-The sensitivity cure of a neighbouring mass, mass 2,
for example, extends over to mass 4, superimposing
this mass.
-There is no helium signal present (during Standby or
Vent, for example).
18
The same applies correspondingly when the UL 200 has
been set to M = 2 amu (H2) or M = 3 amu.
05: to 08: not assigned
09: Password locked Enter password for access to
the extended menu.
See Chapter 2.5.2.
10: Evac Time 1 30 s Monitoring of gross leaks.
This menu item is used to define when the gross leak
message is to occur. The gross leak detection process
operates in two steps and the limits can be adapted as
required.
This menu item is particularly useful in series testing
under the same conditions at all times.
After pressing the Start push-button the test sample is
evacuated. If the pressure conditions are not attained, or
if the pressure does not drop low enough within the peri-
ods of time specified here, the pumpdown process is ter-
minated and the display (4/2) will indicate one of the
messages „EVAC Stopped Time 1“ or „EVAC Stopped
Time 2“.
Within the period of Time 1, the inlet pressure at the test
flange (3/2) must have dropped below 100 mbar. The
duration may be selected freely between 1 second and 9
minutes or can be set to endless.The default is 30 s.
Within the period of Time 2 the status of measurement
readiness must have been attained, i.e. the inlet pressu-
re must have dropped below 2 mbar. The duration may
be freely selected between 1 minute and 10 minutes or
can be set to endless.The default is 10 minutes.
The periods which are selected in each case depend
firstly on the desired reaction time for the gross leak
message, and secondly on the volume of the test sam-
ple and the effective pumping speed.
Caution If the evacuation time was set to endless
the oil level of the mechanical pump
should be checked more often.
11: Sensitivity normal Select sensitivity
normal: The output of leak rates to the hand unit and the
control panel is restricted.
For both hand unit and control panel „-9“ is the
lowest exponent for the unit mbar·l·s-1.Software
filtering is performed over 8 measured values at
intervals of 20 ms.
high: The sensitivity of the leak detector is increased.
The detection limit is Q < 5·10-11 mbar·l·s-1.The
reaction time of the UL 200 is now longer since
software filtering is performed over 512 measu-

red values at intervals of 20 ms, provided the
most sensitive preamplifier area has been sel-
ected.
Switchover occurs at a leak rate of about
1·10-6 mbar·l·s-1.This kind of averaging also
applies when determining the offset. The cali-
bration factor is calculated with normal filtering.
Note
When manual ranging has been selected (MANUAL 4/8),
the exponent „-10“ can be selected also in the „normal“
status.
The resolution limit also affects the display in the Stand-
by mode.
12: Display LR + PE Select information which is to
be displayed on the LCD (4/2)
Information is displayed on the LCD panel (4/2) during
the measurements. One may select between three diffe-
rent information modes:
LR + UNIT: Leak rate and unit are displayed.
LR + PE: Leak rate and inlet pressure are displayed.
PE + PV: Inlet pressure and forevacuum pressure are
displayed.
13: Recorder LR Select chart recorder function
(3/11)
In the extended menu it is possible to define the assign-
ment of the chart recorder outputs. Depending on what
is the selected the following assignments result:
a) Selected assignment: LR
Pin Assignment
————————————————————————
1 Leak rate mantissa
U = 0.1 to 10 V for manual ranging
U = 1 to 10 V for automatic ranging
2 GND, reference ground
3 GND, reference ground
4 Leak rate exponent (step function)
U = 1 to 10 V; 0.5 V / decade starting at
1 V = 1·10-12 mbar·l·s-1 / 1·10-12 Pa m3·s-1.
b) Selected assignment: LR + PE
Pin Assignment
————————————————————————
1 Leak rate, logarithmic
U = 1 to 10 V; 0.5 V / decade starting at
1 V = 1·10-12 mbar·l·s-1 / 1·10-12 Pa m3·s-1.
2 GND, reference ground
3 GND, reference ground
I4 nlet pressure PE, logarithmic
U = 1 to 10 V; 0.5 V / decade starting at
1 V = 1·10-3 mbar / 1·10-3 Pa.
c) Selected assignment: PE + PV
Pin Assignment
————————————————————————
1 Inlet pressure PE, logarithmic
1 U = 1 to 10 V; 0.5 V / decade starting at
1 V = 1·10-3 mbar / 1·10-3 Pa
2 GND, reference ground
3 GND, reference ground
4 Forevacuum pressure of the TMP PV,
logarithmic
U = 1 to 10 V; 0.5 V / decade starting at
1 V = 1·10-3 mbar / 1·10-3 Pa
19
TH 10.211/8.02 - 12/97
10
Pin 4
2 3 5 6
07 8 941 10 U [V]
10-12 10-10 10-8 102104 10-6 10-4 10-2 100mbar·l·s-1
Pa m3·s-1
10
Pin 1
2 3 5 6
0,1 7 8 941
2 3 5 6
0,1 7 8 941
Mantissa
10 U [V]
10
10
Pin 1 LR
Pin 4 PE
2 3 5 6
07 8 941 10 U [V]
2 3 5 6
07 8 941 10 U [V]
10-12 10-10 10-8 10-6 10-4 10-2 100
10-3 10-1 103105 10+1
mbar·l·s-1
Pa m3·s-1
mbar / Pa
10
10
Pin 1 PE
Pin 4 PV
2 3 5 6
07 8 941 10 U [V]
2 3 5 6
07 8 941 10 U [V]
10-3 10-1 10+1 103105
105
10-3 10-1 103 10+1
mbar
Pa
mbar
Pa

14: Control Keyboard 1 Select control location /
define locks
The UL 200 may be controlled from 3 locations. Here it
is possible to define which location is to control the
UL 200.
Keyboard: The UL 200 is controlled by the hand unit
(Fig. 4) and the control panel (Fig. 5).
Access to the keyboard can be restricted
in two levels.
Keyboard 1: The keyboard is fully operational. No
restrictions for the hand unit or the control
panel.
Keyboard 2: The CAL push-button (4/9) is locked. No
changes can be made in the basic menu.
Access to the extended menu as well as
changes to the service menu are only pos-
sible after entering the passwords once
more.
Keyboard 3: The push-button CAL, MANUAL and
ZERO are locked. No changes can be
made in the basic menu. Access to the
extended menu as well as changes to the
service menu can then only be made by
entering the passwords once more. The
UL 200 can only be controlled via the
push-buttons START / STOP / VENT and
volume control.
RS 232: A computer which is connected to SERIAL
(2/10) socket controls the UL 200. All fun-
ction keys on the hand unit and the control
panel are locked. No changes can be
made in the menus.
Ext. Inputs: The UL 200 is controlled via the CON-
TROL connections (3/12) Start, Stop and
Zero. See Chapter 2.6.
The starting process is initiated by a rising
edge at the corresponding input.
When a positive rising edge is applied to
the STOP input, the measurement is stop-
ped or an error is acknowledged.
Venting occurs when a logic level of „1“ is
applied to the STOP input for a period of
time which exceeds the time defined in
menu item 22. In the same way as for the
ZERO push-button (5/1) a constant back-
ground coming from the test sample may
be suppressed via the CONTROL connec-
tion.When applying a logic signal 1 (high),
the current leak rate is reset to Zero (sup-
pression of the external helium backgro-
und). When applying a logic signal 0 (low)
(or when the ZERO input is left unused)
the entire measurement signal will be dis-
played.
15:RS 232 Baud rate 9600 Parameter setting for the
SERIAL connection (3/10)
(refer also to the descripti-
on for the interface
SB 10.211).
16: Relay Mode 1 Definition of the function
output
The function of the relay changeover contacts 11, 12, 13
or 14, 15 and 16 of the plug CONTROL (3/12) can be set
by modifying the relay mode. 3 modes are available:
Mode 1: Contacts 14, 15, 16 generate a ready signal
Mode 2: Contacts 14, 15, 16 generate a fail signal
Mode 3: Contacts 14, 15, 16 generate a ready signal
Contacts 11, 12, 13 generate a fail signal
Note
In mode 3 the treshold value 3 is not available (see
Chapter 2.5.4) the corresponding LED (4/4) is not con-
trolled.
Instrument mode Contact status / linked contacts
Mode 1 and Mode 2: Fail
3: Ready (Mode 3: Fail)
————————————————————————–
UL 200 switched off inactive/Pin 14 and 16 inactive/Pin 14 and 16
closed (11 and 13) closed
UL 200 switched on inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
Standby inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
EVAC inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
Measurement mode active / Pin 14 and 15 active / Pin 14 and 15
closed (11 and 12) closed
Inlet vented, VENT inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
Calibration inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
Fault condition inactive/ Pin 14 and 16 inactive/Pin 14 and 16
closed (11 and 13) closed
SERVICE (default) inactive/ Pin 14 and 16 active / Pin 14 and 15
closed (11 and 12) closed
18: Alarm Trigger off Select acoustic warning
The loudspeaker can output a signal which depends on
the operating mode as described in the following.
off: The frequency of the acoustic output responds in
the same way as the reading on the bargraph dis-
play (5/4). In this mode the presence of a leak can
be localized very well without being able to see the
UL 200 or the hand unit.The sound covers a range
of appr. 300 Hz (underflow (5/5) indicator active) to
appr.3000 Hz (overflow indicator (5/7) active).When
the reading on the bargraph (5/4) moves from the
lower decade to the upper decade, a signal of
f = 900 Hz is generated.
20 TH 10.211/8.02 - 12/97