Pfeiffer Vacuum ASM 340 Technical specifications

Maintenance instructions
EN
Translation of the original instructions
ASM 340
Leak detector

Table of contents
2
Table of contents
1 About this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.1 Applicable documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.2 Pictographs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.3 Instructions in the text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.4 Abbreviations used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.5 Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Safety and maintenance information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Maintenance preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Tools and spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Maintenance intervals and responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Maintenance time monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Calibration with the internal calibrated leak . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Internal calibrated leak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Calibration with an external calibrated leak . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.1 External calibrated leak. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.2 Adaptor for external calibrated leaks. . . . . . . . . . . . . . . . . . . . . . . 13
4.3.3 Calibration procedure with external leak in Hard Vacuum test . . . 14
4.3.4 Calibration procedure with external leak in sniffing test . . . . . . . . 14
4.4 Calibration on concentration (sniffing test mode only) . . . . . . . . . . . . . . . 14
4.5 Calibration of a leak detector connected to a pumping unit . . . . . . . . . . . 15
4.5.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5.2 Target value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5.3 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Maintenance / replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Cleaning the covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Dismantling the covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.1 Dismantling the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.2 Dismantling the rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3 Maintenance of the internal calibrated leak . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.1 Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.2 Recalibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3.3 Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4 Analyzer cell maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.1 Dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2 Seals replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.3 Filament replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 Primary pump maintenance (on Wet Model) . . . . . . . . . . . . . . . . . . . . . . 22
5.5.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5.2 Oil level check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5.3 Oil quality inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5.4 Draining the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5.5 Flushing the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.5.6 Filling the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5.7 Primary pump replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5.8 Replacement of the internal oil mist eliminator . . . . . . . . . . . . . . . 26
5.5.9 Installation of an external mist eliminator . . . . . . . . . . . . . . . . . . . 27
5.6 Maintenance of the turbomolecular pump. . . . . . . . . . . . . . . . . . . . . . . . . 28
5.6.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table of contents
3
5.6.2 Access to the fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.6.3 Replacing the operating fluid reservoir . . . . . . . . . . . . . . . . . . . . . 29
5.7 Pirani gauge maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.7.1 Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.8 Fan maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8.2 Replacement of the air inlet fan . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8.3 Replacement of the turbomolecular pump fan . . . . . . . . . . . . . . . 32
5.8.4 Replacement of the exhaust fan . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.9 Air filters maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.9.1 Air filters location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.9.2 Replacement of air filters no. 1 and no. 2 . . . . . . . . . . . . . . . . . . . 33
5.9.3 Replacement of the vacuum block air filter. . . . . . . . . . . . . . . . . . 34
6 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1 Prolonged downtime. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7 Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1 What happens in case of a fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1.1 Warning / fault display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1.2 Warning / fault window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1.3 List of warnings / faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.2 Troubleshooting guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.2.1 Installation of the application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.2.2 Consultation of the application . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9 Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.1 Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

About this manual
4
1 About this manual
1.1 Validity
This maintenance manual is intended for the customers of the Pfeiffer Vacuum Compa-
ny. It describes the product maintenance operations which can be performed by the user
on the product concerned. This documentation must be used with the operating
manual of the product of the same name.
The current maintenance manuals are also available on the Internet at www.pfeiffer-vac-
uum.com.
This manual covers products with the following part numbers:
1.1.1 Applicable documents
The document to be used in reference to this maintenance manual is:
*also available at www.pfeiffer-vacuum.com
Part number Description
JSVA00AxMx9x ASM 340 Wet (all models)
KSBA00AxMM9A ASM 340 Dry (all models)
ASM 340 Operating Instructions
ASM 340 Operating Instructions P/n 121762 *

About this manual
5
1.2 Conventions
1.2.1 Safety instructions
Operating manual safety instructions Pfeiffer Vacuum are based on the UL, CSA, ANSI
Z-535, SEMI S2, ISO 3864 and DIN 4844 certification standards. This document de-
scribes the following information and danger levels:
DANGER
Imminent danger
Indicates an imminent hazardous situation that will result in death or serious injury.
WARNING
Possibly imminent danger
Indicates an imminent hazardous situation that can result in death or serious injury.
CAUTION
Possibly imminent danger
Indicates an imminent hazardous situation that can result in minor or moderate injury.
NOTICE
Command or note
Command to perform an action or information about properties, the disregarding of
which may result in damage to the product.

About this manual
6
1.2.2 Pictographs
1.2.3 Instructions in the text
1.2.4 Abbreviations used
I/O: Inputs/Outputs
1.2.5 Labels
Prohibition of an action or activity in connection with a source of danger,
the disregarding of which may result in serious accidents
Warning of a displayed source of danger in connection with operation of
the unit or equipment
Command to perform an action or task associated with a source of dan-
ger, the disregarding of which may result in serious accidents
Important information about the product or this document
Work instruction: you must perform an operation here.
[XXXX] You must press the XXXX key on the control panel.
4He Helium 4
3He Helium 3
H2Hydrogen
Indicates an electric shock hazard in case of con-
tact:
disconnect the electrical power supply before
removing the cover and working on the prod-
uct.
Indicates that the operator must:
move the equipment using the devices shown
with this label,
comply with the rules for moving the equip-
ment, taking weight and dimensions into ac-
count.
Locate a grounding point on the product.
Product subject to the treatment of waste elec-
tronic and electrical equipment in accordance
with directive 2002/95/EC.
Other labels: see Operating Instructions.

Safety and maintenance information
7
2 Safety and maintenance information
2.1 Safety precautions
●Wait 5 minutes after switch-off before working on the product.
●When you order spare parts, you must mention everything featured on the product
nameplate.
●Comply with all safety and risk prevention instructions in accordance with local safety
standards.
●Regularly check compliance with all precautionary measures.
●Do not switch on the product if the covers are not in place.
●To return the product to one of our Pfeiffer Vacuum service centers, read the after-
sales Service procedure and complete the declaration of contamination available on
our website.
●Use the original packaging to return the product to a Pfeiffer Vacuum service center:
the manufacturer shall not be held liable for any damage resulting from transport in
unsuitable packaging.
Duty to inform
Every person who is involved in maintenance and servicing work on the pump must read
and follow the safety-relevant parts of all associated documents.
NOTICE
Exclusion of liability
Pfeiffer Vacuum accepts no responsibility concerning equipment damage, disrupted
service or physical injury resulting from maintenance carried out by technicians who
have not been trained in safety rules (EMC, electrical hazards, chemical pollution). Lia-
bility and warranty claims shall be inadmissible in this case.
WARNING
Risk of electric shock
Voltage and current can cause electric shock. Only skilled, authorised people may carry
out maintenance work.
Insulate and lock the power supply circuit by positioning the circuit breaker on "0"
Disconnect the power cable from all power sources before any work on the product
and/or removing the covers.
WARNING
Other located hazardous energies
Electrical circuit and other pressurized circuits as nitrogen are potential hazards:
Always lock out these energy sources before working on the product.
NOTICE
Work/Handling the detector
The operator must not work on the product to move it or carry out maintenance until it
has come to a complete shutdown! When the circuit breaker is set at "0", you must:
Unplug the power cable.
Wait for the control panel screen to turn off completely before working on the product
and/or removing the covers.

Safety and maintenance information
8
2.2 Protective equipment
In some situations, personal protective equipment must be worn when handling the de-
tector and its components. Customers must provide operators with the necessary equip-
ment. This equipment must be checked regularly and used in accordance with the sup-
plier's recommendations.
2.3 Maintenance preparation
Disconnect the detector from the part/installation to be tested: install the blanked-off
flange on the detector's inlet (accessory supplied with the product or available upon
request (see Accessories chapter of the Operating Instructions).
Handle the detector so it can be moved in the maintenance area (see Handling chap-
ter of the Operating Instructions).
●clean, dust-free and ventilated room,
●appropriate protective equipment.
DANGER
Health hazard in case of contact with the operating fluid
Contact with or inhaling products such as oil from the primary pump can cause irritation.
Wear appropriate protective equipment when carrying out maintenance or adding/
draining oil.
kg
WARNING
Risk of injury through falling objects
When transporting parts/items by hand, there is a danger through loads slipping and fal-
ling down.
Carry small and mid-size parts/items two-handed.
Carry parts/items > 20 kg with a suitable lifting device.
Wear safety shoes with steel toe cap according to directive EN 347.
WARNING
Risk of injury through hot surfaces
The products are designed so as not to present a thermal risk for the operator's safety.
However, specific operating conditions may exist that require extra caution from users
due to the high temperatures (surfaces > 70 °C for parts inside the covers):
Leave the part to cool before working on the product.
If necessary wear protective gloves according to directive EN 420.
CAUTION
Risk of pinching
When handling the storage tank cover, there is a risk of fingers becoming pinched.
NOTICE
Work/Handling the detector
The operator must not work on the product to move it or carry out maintenance until it
has come to a complete shutdown! When the circuit breaker is set at "0", you must:
Unplug the power cable.
Wait for the control panel screen to turn off completely before working on the product
and/or removing the covers.

Safety and maintenance information
9
2.4 Tools and spare parts
The tools necessary for the maintenance of the detector are available in the maintenance
kit supplied with the product. Depending on the maintenance operation, other tools may
be needed, at the customer’s expense.
Necessary spare parts
Replacement of defective components with parts that are not genuine, jeopardizes the
initial safety conditions of the equipment.
Use only spare parts available by asking Pfeiffer Vacuum Service.
Ordering information is available in chapter Spare parts.
To correctly identify the product when communicating with Pfeiffer Vacuum, always
have the information from the product rating plate available.

Maintenance intervals and responsibilities
10
3 Maintenance intervals and responsibilities
Level 1 and 2 maintenance operations of the service frequency table are described in
this maintenance manual.
Level 3 overhaul operations require the intervention of a technician from the Pfeiffer Vac-
uum Service network.
Component Number of hours in use Level (3) Site (4)
Operation Routine main-
tenance (2) 8,600 17,200 Others
Primary pump RVP 1015 (Model Wet)
Oil level and appearance check x II OS
Oil change x 4,300 hours if (1) II OS
Pump replacement In case of failure III OS
2 AMD1 Primary pumps (Model Dry)
Replacement of the diaphragms and valves x III OS
Pump replacement In case of failure III OS
Oil mist eliminator
Oil mist eliminator replacement x 4,300 hours if (1) II OS
Splitflow 50 turbomolecular pump
Operating fluid reservoir replacement x II OS
Bearings replacement In case of failure III OS
Replacement of the TC 110 frequency converter In case of failure III OS
Pump replacement In case of failure III OS
Analyzer cell
Filament replacement In case of failure I OS
Valves
Replacement of all valves Every 500,000 tests III OS
Air inlet filter
Cleaning or replacement of the air inlet filter x II OS
Pirani gauge
Setting x Every 4,300 hours
(recommended)
IOS
Replacement In case of failure II OS
Smart sniffer probe
Capillary filter replacement x Every 160 hours (rec-
ommended)
IOS
Sintered filter replacement x Every 160 hours (rec-
ommended)
IOS
Standard sniffer probe
Sintered filter replacement x Every 160 hours (rec-
ommended)
IOS
Fans
Fan replacement In case of failure II OS
Cleaning or replacement of the fan air filter x I OS
Calibrated leak
Recalibration x Or every 3 years II WS
Leak detector
Service x Every 3 years
(recommended)
III OS/WS
(1) In case of severe application
(with significant flow or contami-
nation)
(2) Routine maintenance: accord-
ing to usage conditions
(3) Level :
I = Operator
II = Technical or trained operator
III = Service center
(4) Site:
OS = On site
WS = In Pfeiffer Vacuum service
center.

Maintenance intervals and responsibilities
11
3.1 Maintenance time monitoring
The cycle counters of the primary pump and turbomolecular pump alert the operator that
a maintenance operation must be performed (see Maintenance Menu of the Operating
Instructions).

Calibration
12
4Calibration
4.1 Purpose
Calibration helps ensure that the leak detector is correctly adjusted to detect the tracer
gas selected and display the correct leak rate. A calibrated leak is used to calibrate the
leak detector.
Depending on the test method, different types of calibration can be performed.
(*) in this case, the flow of the sniffer probe is not included in the leak detector calibration process.
4.2 Calibration with the internal calibrated leak
4.2.1 Internal calibrated leak
The internal calibrated leak is specifically designed for the leak detector. It is composed
of:
●a Helium 4 reservoir (no internal calibration with the other tracer gases),
●a temperature sensor (to take into account the effect of temperature on the leak rate),
●an integrated diaphragm (to calibrate the leak rate),
●an identification label (identical to the identification label of an external calibrated
leak).
The calibrated leak is supplied with a calibration certificate.
4.2.2 Procedure
When switching the leak detector on, calibration with the internal calibrated leak is auto-
matically initiated if the calibration parameter is set on ’Start-up’ and if the type of cali-
brated leak is set on ’Internal’.
Check the leak settings (corrected leak rate to take temperature and time into account
if necessary) (see Spectro Menu of the Operating Instructions).
Press [Auto cal] key to launch a calibration.
In the case of intensive use of the detector, a spare internal calibrated leak is recom-
mended. If this is not possible, the detector can still be used and calibrated using an ex-
ternal calibrated leak.
Test method
Hard Vacuum Sniffing
With the internal calibrated leak yes yes (*)
With an external calibrated leak yes yes
With the ambient air (ambient air not contaminated by the
tracer gas)
no yes
NOTICE
Detector calibration
When switched on, the detector suggests that the operator carry out an auto-calibration
(if calibration parameter = operator). For the optimal use of the detector, this auto-ca-
libration must be performed. In all situations, a manual or automatic calibration must
be performed:
●at least once a day
●to optimise the measurement reliability for high sensitivity tests
●if it is uncertain whether the detector is working properly
●during intense and continuous operation: start an internal calibration at the beginning
of each work session (e.g. work in teams, every 8 hours).

Calibration
13
4.3 Calibration with an external calibrated leak
4.3.1 External calibrated leak
The operator must use a calibrated leak containing the tracer gas selected (4He, 3He or
H2). There are several types of external calibrated leaks, with or without reservoir, with
or without valve, covering several leak ranges. Use calibrated leaks from the ranges in-
dicated below.
The manufacturer does not provide calibrated leaks in 3He and H2.
4.3.2 Adaptor for external calibrated leaks
A DN 16 ISO-KF or DN 25 ISO-KF adaptor helps calibrate the detector with an external
calibrated leak in sniffing test mode (with Standard probe only).
Adaptor part numbers: (see 9)
Fig. 1: Adaptor installation
Attach the adaptor (1) to the external calibrated leak (2) used for the calibration with
centering ring and a clamp.
Start a calibration: press the [Auto cal] function key.
Fit the sniffer probe (3) in the calibration opening.
Tighten the fixing screw (4). Follow the calibration process indicated on the control
panel.
Loosen the fixing screw (4).
Remove the sniffer probe from the calibration opening.
Continue the calibration process indicated on the control panel.
Wait 10 s (at least) before reading the leak rate.
Notes
●The displayed leak rate takes 4He into account (if 4He used as tracer gas).
Example:
Gas Minimum Value Maximum Value
4He ≈1.10-9 mbar·l/s
≈1·10-10 Pa·m3/s
1·10-4 mbar·l/s
1·10-5 Pa·m3/s
3He ≈3·10-7 mbar·l/s
≈3·10-8 Pa·m3/s
1·10-4 mbar·l/s
1·10-5 Pa·m3/s
H2≈5·10-6 mbar·l/s
≈5·10-7 Pa·m3/s
1·10-4 mbar·l/s
1·10-5 Pa·m3/s
The choice of external calibrated leak depends on the needs of the application:
use a calibrated leak from the same leak rate range as the leak to be measured.
13
2
4

Calibration
14
– calibration with a leak of 2·10-5 mbar·l/s
– the displayed leak rate is: 2·10-5 +5·10
-6 = 2.5·10-5 mbar·l/s
4.3.3 Calibration procedure with external leak in Hard Vacuum test
Allocate a function key to [Auto.Cal] (see Configuration Menu in the Operating In-
structions).
Configure the following settings:
●test method = hard Vacuum (see Test Menu)
●type of calibrated leak = external (see Spectro Menu)
●calibration = operator (see Advanced Menu)
Check the settings and value of the external calibrated leak used (see Spectro
Menu). Correct the temperature, month and year if necessary.
Select the tracer gas of the external calibrated leak.
Place the external calibrated leak on the detector inlet port.
Verify that the detector is on Stand-by.
Press the [Auto.Cal] function key to start the calibration.
Follow the instructions provided by the leak detector to move to the next stage.
At the end of the calibration, the detector returns to Stand-by mode.
4.3.4 Calibration procedure with external leak in sniffing test
Allocate a function key to [Auto.Cal] (see Configuration Menu in the Operating In-
structions).
Configure the following settings:
●test method = sniffing (see Test Menu)
●type of calibrated leak = external (see Spectro Menu)
●calibration = operator (see Advanced Menu)
Check the settings and value of the external calibrated leak used (see Spectro
Menu). Correct the temperature, month and year if necessary.
Select the tracer gas of the external calibrated leak.
Connect the sniffer probe to the detector.
Verify that the detector is on Stand-by.
Press the [Auto.Cal] function key to start the calibration.
Follow the instructions provided by the leak detector: press [Next] to move to the next
stage.
At the end of the calibration, the detector returns to Stand-by mode.
4.4 Calibration on concentration (sniffing test mode only)
Concentration = container at atmospheric pressure with a gas mixture of a known 4He
concentration.
Procedure Allocate a function key to [Auto.Cal] (see Configuration Menu in the Operating In-
structions).
Configure the following settings:
●test method = sniffing (see Test Menu)
Recommended procedure when the measuring range differs from the value of the
internal calibrated leak.
NOTICE
Before launching this function, make sure that the leak detector is in an environ-
ment free of tracer gas pollution.

Calibration
15
●type of calibrated leak = concentration (see Spectro Menu)
●calibration = operator (see Advanced Menu)
●tracer gas = 4He (see Spectro Menu)
Connect the sniffer probe to the detector.
Verify that the detector is in Stand-by mode.
Press the [Auto.Cal] function key to start the calibration.
Follow the instructions provided by the leak detector: press [Next] to move to the next
stage.
At the end of the calibration, the detector returns to Stand-by mode.
4.5 Calibration of a leak detector connected to a pumping unit
4.5.1 Purpose
When the leak detector is connected to an installation equipped with its own pumping
unit, only part of the leak will be analyzed by the leak detector. Calibration helps obtain
a direct reading of the leak rate by taking into account the loss of tracer gas of the leak
pumped by the pumping unit.
Calibration is performed via the Correction function.
4.5.2 Target value
3 possible target values:
(1) When an external calibrated leak is used, it is recommended to take into account the calibration date
and temperature effect for calculating the target value from the calibrated leak value featured on its
identification label.
●Corrected leak rate = target value = measured leak value x correction factor.
●Background corrected leak rate = background measured leak rate x correction factor.
4.5.3 Procedure
The correction must be made once the leak detector has been calibrated.
Note The correction must be made using the same test method as that used by the op-
erator. If the operator works using both test methods (Hard Vacuum and sniffing),
he/she must make a correction for each method.
Allocate a [Correction] function key (see Configuration Menu in the Operating In-
structions).
Select the 'Hard Vacuum' or 'sniffing' test mode.
●If ’Sniffing test’, connect the sniffer probe to the detector: connect it to an external
calibrated leak or place it in a container with a known concentration.
Press to start a test.
Press the [Correction] function key.
●if the value of the correction factor to be applied is known:
– Press [Value] and configure the correction factor to be applied. The correction fac-
tor is the coefficient to be applied to the measured leak rate.
– Press [Return] to exit the function.
●if the value of the target leak rate is known (value of the internal/external calibrated
leak or concentration):
– Press [AutoCal] [Target] and configure the target leak rate.
– Press [Run] to make the correction.
Target value = Hard Vacuum Sniffing
External calibrated leak value (1) ✓✓
Tracer gas concentration of a container filled with a
known gas mixture including the tracer gas
✓
Ambient air (be careful with the tracer gas concentra-
tion: no tracer gas pollution)
✓

Calibration
16
–Press[Return] to exit the function.
Press [Reset] to reset the correction factor to 1.
The ’COR’ indicator light (see Standard screen of the Operating Instructions, ref. 9) is
illuminated on the control panel as soon as the value of the correction factor is not 1.
The digital display takes into account the correction factor applied.
The bargraph display does not take into account the correction factor applied.

Maintenance / replacement
17
5 Maintenance / replacement
5.1 Cleaning the covers
Clean the covers using a lint-free cloth and a product which does not damage printed
surfaces and self-adhesive labels.
5.2 Dismantling the covers
Tools ●5 mm Allen key supplied in the maintenance kit
5.2.1 Dismantling the front cover
Shut down the detector (Position the circuit breaker on 0, control panel switched
off and mains power cable disconnected).
Install the blanked-off flange on the detector's inlet port.
Remove the black flange around the inlet port.
Lift the lid of the storage tank: loosen and remove the 2 upper fixing screws.
Loosen and remove the 2 side fixing screws.
Fig. 2: Location of the front cover dismantling screw
Take off the front cover and remove it from the detector (1.5 m max).
On the supervisor board, disconnect the connector from the control panel to fully re-
lease the cover.
Fig. 3: Disassembly of the front cover

Maintenance / replacement
18
5.2.2 Dismantling the rear cover
Dismantle the front cover. Loosen and remove the 5 fixing screws (1), (2) and their
washers.
Disconnect the harness (3) and the ground point (4).
Remove the rear cover.
When reassembling the cover, make sure that the 5 fixing screws for the rear cover on
the frame are in place and properly screwed.
5.3 Maintenance of the internal calibrated leak
5.3.1 Replacement
Tools/
Spare parts
●3 mm Allen key supplied in the maintenance kit
●Internal calibrated leak (see 9)
Fig. 4: Calibrated leak maintenance
Remove the front cover.
Disconnect the temperature sensor (3) from the calibrated leak. Never separate the
temperature sensor from the calibrated leak.
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3
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NOTICE
Change the internal calibrated leak if it has significant impact marks.
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Maintenance / replacement
19
Loosen the 2 fixing screws (2) without removing them.
Rotate the internal calibrated leak by 90°.
Replace the leak (1).
Rotate the calibrated leak by 90° so that the temperature sensor is positioned under-
neath the valve.
Connect the temperature sensor (3).
Update the settings of the internal calibrated leak (see Spectro Menu of the Operat-
ing Instructions).
5.3.2 Recalibration
Most calibrated leaks can be used for many years (≈6 years) even though the tracer gas
is permanently escaping (the leak rate is very low compared with the amount of tracer
gas contained in the reservoir: annual loss is indicated on the calibrated leak identifica-
tion label).
However, to guarantee the reliability of the test, we recommend that you regularly reca-
librate (3 years maximum) every leak with reservoir to check its leak rate: this applies to
both internal and external calibrated leaks.
Return the leak to your Pfeiffer Vacuum service center for recalibration purposes.
5.3.3 Setting
The setting of the calibrated leak must be updated every time a calibrated leak (inter-
nal or external) is replaced or after a recalibration (seeSpectro Menu intheOperating
Instructions).
This operation can be carried out with the information featured on the calibrated leak
identification label or the certificate supplied with the calibrated leak.
●If type = ’internal’ is set for the calibrated leak, the internal calibrated leak parameters
are displayed in the menu.
●It type = ’external’ is set for the calibrated leak, the external calibrated leak parameters
are displayed in the menu.
Fig. 5: Example of identification label
5.4 Analyzer cell maintenance
Made in France :
FUITE HELIUM CALIBREE
HELIUM CALIBRATED LEAK
Réf. : FV4720
N° : FC12434
Valeur / value : 1,2E-7 mbar.l/s ± 10 %
Date de calibration / Calibration date. : 17-Nov-2012
Pertes par an / Loss per year............. : 2 %
Coeff. de tempér. / Temperature coeff.: 2 %
Température / Temperature................ : 23 °C
*FV4720*
NOTICE
Cleanliness guarantee
During vacuum component maintenance operations, avoid any contamination which
could subsequently result in the degassing of the parts. To avoid this:
perform the maintenance in an appropriate area (clear, dust-free and ventilated)
use non-woven materials
dust the parts with filtered dry air
wear unpowdered vinyl gloves (clean room gloves)

Maintenance / replacement
20
5.4.1 Dismantling
Tools ●Torx screwdriver supplied in the maintenance kit
Procedure
Create an air inlet in the cell via the Maintenance Menu (see Operating Instructions).
Shut down the detector (Position the circuit breaker on 0, control panel switched
off and mains power cable disconnected).
Remove the front cover (see 5.2.1).
Disconnect the harness (1) from the cell.
Loosen the 6 fixing screws (2) of the cell.
Free the analyzer cell manually and vertically.
Fig. 6: Dismantling the analyzer cell
5.4.2 Seals replacement
Check the condition of the seals every time you work on the analyzer cell (filament re-
placement for example): change them if necessary.
Spare parts ●2 seals (see 9)
Seal is consumables. As such, it is not covered by the warranty.
Procedure
Fig. 7: Replacement of the seals
Remove the analyzer cell from the detector (see 5.4.1).
Replace the 2 seals (3). Never lubricate the seals.
WARNING
Risk of burning associated with hot surfaces
When in operation, certain mechanical parts can reach high temperatures. If the detec-
tor was used recently:
Let it cool down for at least 15 minutes before working on the analyzer cell.
When relevant, use protective gloves in accordance with the EN 420 standard.
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