Edwards IG40 BA User manual

edwardsvacuum.com
IG40 BA AND EX LOW PRESSURE
PASSIVE GAUGES
INSTRUCTION MANUAL
Publication number: D0300030001EN
Issue: B
Original Instructions

Copyright notice
© Edwards Limited 2021. All rights reserved.
Trademark credits
Edwards and the Edwards logo are trademarks of Edwards Limited, Innovation Drive, Burgess
Hill, West Sussex RH15 9TW.
Disclaimer
The content of this manual may change from time to time without notice. We accept no liability
for any errors that may appear in this manual nor do we make any expressed or implied warran-
ties regarding the content. As far as practical we have ensured that the products have been de-
signed and constructed to be safe and without risks when properly installed and used in accord-
ance with their operating instructions.
We accept no liability for loss of profit, loss of market or any other indirect or consequential loss
whatso-ever.
Product warranty and limit of liability are dealt with in our standard terms and conditions of sale
or negotiated contract under which this document is supplied.
You must use this product as described in this manual. Read the manual before you install, op-
erate, or maintain the product.
D0300030001EN - Copyright notice

D0300030001EN - Contents
Page i
Contents
Safety 1
Symbols used ..................................................................................................................... 1
Symbols for residual risks ............................................................................................ 1
Personnel qualifications .................................................................................................... 1
General safety instructions ................................................................................................ 1
Responsibility and warranty .............................................................................................. 1
Description 3
Product identification ........................................................................................................ 3
Validity ............................................................................................................................... 3
Intended use ...................................................................................................................... 3
Technical data 4
General gauge head data ................................................................................................... 4
Dimensions ........................................................................................................................ 5
Installation 6
Supplied equipment .......................................................................................................... 6
Assembly ............................................................................................................................ 6
Connecting the bakeable gauge head cable. ................................................................ 7
Preparing the gauge head for the connection of the bakeable gauge head cable ....... 7
Connecting the bakeable gauge head cable to the flange on the gauge head ............ 8
Fitting the gauge head including the bakeable gauge head cable ............................... 9
Operation 10
Calibration ....................................................................................................................... 10
Operation ......................................................................................................................... 10
Maintenance 11
Exchanging the Cathode .................................................................................................. 11
Preparation ................................................................................................................. 11
Spares and accessories 13
Spares .............................................................................................................................. 13
Accessories ................................................................................................................. 13
Storage 14
Return the equipment or components for service 15
Disposal 16
Separating the components ............................................................................................ 16
Contaminated components ........................................................................................ 16
2021-AVG-GCN-0002

D0300030001EN - Contents
Page ii
Other components ..................................................................................................... 16
Other Disposal Information ........................................................................................ 16
List of Figures
Dimensions ................................................................................................................ 5
Gauge head connection ............................................................................................. 8
View onto the gauge head ........................................................................................ 9
View onto the gauge head ...................................................................................... 12
List of Tables
General gauge head data .......................................................................................... 4
Bakeable gauge head cable ....................................................................................... 5
Operating characteristics when used with control unit PGC202 ............................... 5
Gauges ....................................................................................................................... 6
Bakeable gauge head cable ....................................................................................... 6
Spare parts .............................................................................................................. 13
Gauge head cables .................................................................................................. 13

D0300030001EN - Safety
Page 1
Safety
Symbols used
Symbols for residual risks
Personnel qualifications
All work described in this document may only be carried out by persons who have suitable
technical training and the necessary experience or who have been instructed.
General safety instructions
 Adhere to the applicable regulations and take the necessary precautions for the
process media used.
 Consider possible reactions with the product materials.
 Adhere to the applicable regulations and take the necessary precautions for all work
you are going to do and consider the safety instructions in this document.
 Before beginning to work, find out whether any vacuum components are
contaminated. Adhere to the relevant regulations and take the necessary precautions
when handling contaminated parts.
Communicate the safety instructions to all other users.
Responsibility and warranty
Edwards will not assume any responsibility or warranty in cases where the operator or third
persons:
 Do not observe the information given in this document.
 Do not use the product as intended.
 Modify the product in any way (conversions, repair work, etc).
WARNING:
Warnings are given where failure to observe the instruction could result in injury or death
to people.
CAUTION:
Cautions are given where failure to observe the instruction could result in damage to the
equipment, associated equipment and process.

D0300030001EN - Safety
Page 2
 Operate the product with accessories not listed in the corresponding product
documentation.
Subject to technical alterations without prior notice. The figures are not binding.

D0300030001EN - Description
Page 3
Description
The IG40 BA is a Bayard-Alpert measurement system and the IG40 EX is an extractor
measurement system. Operation of these sensors is based on the hot cathode ionisation
effect.
The temperature resistant gauge head cable must not be exposed to a temperature
exceeding 200 °C maximum (250 °C at the flange of the sensor).
Product identification
A nameplate is located on the protection cover. When communicating with Edwards, stating
the information on the nameplate is necessary.
Validity
This document applies to products with part numbers
Intended use
The IG40 BA and EX may only be used for the measurements of total pressures in vacuum
systems and only when connected to a PGC202 vacuum gauge controller instrument.
Product Description Item number
IG40 BA DN40CF Bayard-Alpert Ion Gauge D03000300
IG40 EX DN40CF Extractor Ion Gauge D03000310
IG40 BA / EX cable 5 m Bakeable D03000301
IG40 BA / EX cable 10 m Bakeable D03000302
IG40 BA / EX cable 50 m Bakeable D03000303

D0300030001EN - Technical data
Page 4
Technical data
General gauge head data
Table 1 General gauge head data
Description IG40 BA IG40 EX
Materials
Lead-in pins NiFe
Insulator Al203 ceramic
Pin sealing plate NiFe
Flange Stainless steel
Cathode Iridium with yttrium oxide coating
Anode Pt/Ir 90/10 and Mo/Pt
wrapped wire Stainless steel 1.4404
Collector Tungsten
Reflector NiFe
Flange connection DN 40 CF
Electrode system configuration Bayard-Alpert Extractor system
Ambient temperature during
operation 20 to 80 °C
Maximum flange temperature with
bakeable gauge cable 250 °C
Maximum bakeout temperature
(with no cable connected) 400 °C
Maximum recommended rate of
temperature change during bakeout 5 °C per minute
Storage temperature 20 to 50 °C
Relative humidity
Annual average 65% (non-condensing)
On 60 days 85% (non-condensing)
Use Indoors (altitude 2000 m maximum above sea level)
X-ray limit < 1 x 10-11 mbar (hPa) < 1 x 10-12 mbar (hPa)
Upper limit of measuring range 1 x 10-2 mbar (hPa) 1 x 10-4 mbar (hPa)
Lower limit of measuring range 2 x 10-11 mbar (hPa) 2 x 10-12 mbar (hPa)

D0300030001EN - Technical data
Page 5
Table 2 Bakeable gauge head cable
Table 3 Operating characteristics when used with control unit PGC202
Dimensions
Figure 1 Dimensions
Description Value
Maximum bakeout temperature 200 °C
Recommended rate of temperature
change
5 °C per minute
Insulation materials used PTFE, PEEK
Length 5, 10 or 50 m
Description IG40 BA IG40 EX
Collector potential 0 V
Cathode potential +80 V +100 V
Anode potential +220 V +220 V
Reflector potential - +205 V
Emission current range 100 A, 10 mA 1.6 mA
Cathode heater current 1.5 A (typical)
Cathode heater voltage 3 V (typical) 3.7 V (typical)
Sensitivity for nitrogen 17 mbar-1 (hPa-1) (typical) 6.25 mbar-1 (hPa-1) (typical)
Maximum bake-out power 90 mA/480 V 45 mA/480 V
IG40 BA IG40 EX

D0300030001EN - Installation
Page 6
Installation
Supplied equipment
Assembly
When mounting the gauge head to the vacuum system, ensure that the gauge is not
subjected to mechanical oscillations, vibrations or impacts.
Do not install a vent valve in the immediate vicinity of the gauge head. Sudden changes in air
flow may result in mechanical damage to the sensitive cathode. The mounting position of the
gauge head has no influence on the correct operation.
When installing several gauge heads at one common component (T-piece or cross for
example) an optical separation is required. The gauge heads must not be in direct line of sight
of each other. Interactions may cause incorrect measurements.
Table 4 Gauges
Description Quantity
Gauge 1
Operating manual 1
Table 5 Bakeable gauge head cable
Description Quantity
Bakeable gauge head cable 1
Housing with cover 1
Ion collector cable 1
Countersunk screws 2
Operating manual 1
WARNING:
Installation, mounting and removal may only be carried out with the operating unit
switched off.
WARNING:
As a rule, all ionisation measurement systems must only be operated in connection with
a properly earthed pump system.
Note:
Humidity at the insulators (Figure 2 item 14) caused by condensing water for example, can
give rise to incorrect measurements due to leakage currents.

D0300030001EN - Installation
Page 7
Connecting the bakeable gauge head cable.
Preparing the gauge head for the connection of the bakeable gauge head cable
Remove the plug guide (Figure 2 item 4) by unscrewing the cylinder head screws
(Figure 2 items 5 and 6) from the gauge head (Figure 2 item 1).
The IG40 EX gauge head has been designed with a greater distance between gauge head
flange (Figure 2 item 1) and plug guide (Figure 2 item 4).
For this reason three spacers have been fitted between gauge head flange (Figure 2 item 1)
and the plug guide (Figure 2 item 4). Do not loose the 3 spaces as these are required when
installing the bakeable gauge head cable. Positioning of the plug guide is defined through the
different bolt diameters on the gauge head (Figure 2 item 1).
WARNING:
If during operation the IG 40 BA/EX suffers a malfunction then a live voltage maybe
present at the gauge head measurement signal connection.
Affix the touch protection component at the BNC plug on the bakeable gauge head cable
after it is connected to the PGC202 and before the PGC202 is switched on. The touch
protection component is supplied together with the gauge head cable.
WARNING:
Switch the gauge off first before working at the gauge cable. After switching off, wait for
at least 15 seconds.
Note:
The bakeable gauge head cable may also be connected after the gauge head has already been
installed.

D0300030001EN - Installation
Page 8
Figure 2 Gauge head connection
Connecting the bakeable gauge head cable to the flange on the gauge head
1. Pull the cover (Figure 2 item 9) and then the housing (Figure 2 item 13) over the
bakeable gauge head cable (Figure 2 item 11) so the connection sockets can be fitted
to the gauge head (Figure 2 item 1).
2. Connect the bakeable gauge head cable to the gauge head as depicted in Figure 3. The
individual wires of the gauge head cable are colour-coded.
3. Bolt the housing (Figure 2 item 13) onto the gauge head flange (Figure 2 item 1) with
the bolts (Figure 2 items 5 and 6) and, in the case of the IG40 EX only, the 3 spacers
CAUTION:
Especially note the pin assignment. Provide the connection with great care. Do not subject
the pin contacts to any bending forces (Risk: damaging of the current feed-through/leak).
1. Gauge head
2. Spacer for M3 screw
3. Spacer for M4 screw
4. Plug guide
5. Cylinder head screw M3
6. Cylinder head screw M4
7. Ion collector cable (coaxial)
8. Countersunk screws (M3 × 15)
9. Lid
10. Strain relief
11. Bakeable gauge head cable
12. Cable groove
13. Housing

D0300030001EN - Installation
Page 9
(Figure 2 items 2 and 3). Secure the entire cable with the strain relief (Figure 2 item
10).
4. Now the ion collector cable (Figure 2 item 7) can be inserted at the centre of the gauge
head.
5. Secure the cover (Figure 2 item 9) with the bolts (Figure 2 item 8).
Fitting the gauge head including the bakeable gauge head cable
The gauge head including the bakeable gauge head cable can be now inserted into the
vacuum chamber and bolted on.
For removing or replacing the gauge head proceed in the reverse order. The plug must be
unlocked in the gauge head housing, and for this reason unscrew the cover (Figure 2 item 9)
first.
Figure 3 View onto the gauge head
Note:
Before connecting, Edwards recommends pumping down the system and if possible running a
vacuum test or a direct leak search.
WARNING:
If during operation the IG 40 BA/EX suffers a malfunction then a live voltage maybe
present at the gauge head measurement signal connection.
Affix the touch protection component at the BNC plug on the bakeable gauge head cable
after it is connected to the PGC202 and before the PGC202 is switched on. The touch
protection component is supplied together with the gauge head cable.
Pin Colour IG40 EX IG40 BA
1 yellow/green LP*
*LP (longest pin) = protective earth conductor (for
facilitating installation)
LP*
2 grey jumper -†
†Function not available for IG40 BA but must be
connected.
3 blue reflector -†
4 red anode anode
5 brown cathode cathode
6 white cathode cathode
7 pink jumper -†

D0300030001EN - Operation
Page 10
Operation
Calibration
Each IG40 BA/EX gauge head has been individually calibrated in the course of final factory
testing. This ensures a high accuracy of the pressure readout.
The appropriate sensitivity coefficient factor can be found on the calibration sticker located
on the reverse side of the cover of this manual.
Operation
WARNING:
Do not use the IG 40 BA/EX for safety critical applications. The IG 40 BA/EX is not intended
to be fail safe.
WARNING:
Do not use the IG 40 BA/EX to measure the pressure of explosive of flammable gasses or
mixtures.
Note:
Emission current "ie" and calibration factor "CAL" can be found on the calibration sticker
located on the reverse side of the cover of this manual.
CAUTION:
Humidity at the insulators (Figure 2 item 14) caused by condensing water for example, can
give rise to incorrect measurements due to leakage currents.
Note:
In the presence of halogen gases like fluorine, chlorine, bromine and iodine and their
compounds, the yttrium oxide coating will suffer rapid wear. As a result of this, the cathodes
will burn out.

D0300030001EN - Maintenance
Page 11
Maintenance
Exchanging the Cathode
Preparation
1. Switch off the operating unit.
2. Detach the gauge head cable from the gauge head.
3. Remove the gauge head from the vacuum system.
4. After loosening the hex screws at both terminals remove the faulty cathode.
5. Open the transport packaging, remove the replacement cathode in the same way and
install it in the place of the old cathode.
The required 0.89 mm screwdriver is included with the replacement cathode.
WARNING:
Contaminated parts can be detrimental to health and environment.
Before you begin to work, find out whether any parts are contaminated. Adhere to the
relevant regulations and take the necessary precautions when handling contaminated
parts.
CAUTION:
Dirt and damage can impair the function of the vacuum component.
When handling vacuum components, take appropriate measures to ensure cleanliness
and prevent damage.
CAUTION:
Touching the product with bare hands increases the desorption rate.
Always wear clean, lint-free gloves and use clean tools when working in this area.
Note:
The cathode is supplied on a plate under a cover. The cathode must only be exchanged in a
room which is free of dust. Wearing of clean gloves is mandatory.

D0300030001EN - Maintenance
Page 12
Figure 4 View onto the gauge head
The cathode should be positioned as parallel as possible with respect to the anode. The
initially applicable calibration values do not apply any longer after exchanging the cathode.
Deviations up to 15% may occur.
IG40 BA IG40 EX
1. Anode
2. Cathode
3. Terminal
4. Hex screw

D0300030001EN - Spares and accessories
Page 13
Spares and accessories
Spares
When ordering spare parts, always indicate:
 All information on the product nameplate.
 Product description and item number according to the spare parts list.
Table 6 Spare parts
Accessories
Table 7 Gauge head cables
Product description Item number
Spare cathode IG40 BA D03000309
Spare cathode IG40 EX D03000319
Product description Item number
IG40 BA/EX cable 5 m bakeable D03000301
IG40 BA/EX cable 10 m bakeable D03000302
IG40 BA/EX cable 50 m bakeable D03000305

D0300030001EN - Storage
Page 14
Storage
CAUTION:
Inappropriate storage leads to an increase of the desorption rate and/or may result in
mechanical damage of the product.
Cover the vacuum ports of the product with protective lids or grease free aluminum foil.
Do not exceed the admissible storage temperature range.

D0300030001EN - Return the equipment or components for service
Page 15
Return the equipment or components for service
Before you send your equipment to us for service or for any other reason, you must send us
a completed Declaration of Contamination of Vacuum Equipment and Components – Form
HS2. The HS2 form tells us if any substances found in the equipment are hazardous, which is
important for the safety of our employees and all other people involved in the service of your
equipment. The hazard information also lets us select the correct procedures to service your
equipment.
We provide instructions for completing the form in the Declaration of Contamination of
Vacuum equipment and Components – Procedure HS1.
Download the latest documents from www.edwardsvacuum.com/HSForms/, follow the
procedure in HS1, fill in the electronic HS2 form, print it, sign it, and return the signed copy to
us.
Note:
If we do not receive a completed HS2 form, your equipment cannot be serviced.

D0300030001EN - Disposal
Page 16
Disposal
Separating the components
After disassembling the product, separate its components according to the following criteria:
Contaminated components
Contaminated components (radioactive, toxic, caustic or biological hazard, etc.) must be
decontaminated in accordance with the relevant national regulations, separated according to
their materials, and disposed of.
Other components
Such components must be separated according to their materials and recycled.
Other Disposal Information
The IG40 BA/EX and associated cables are within the scope of the European Directive on
Waste and Electronic Equipment, 2012/19/EU. Edwards offers customers a recycling service
for the product/cables/associated gauge heads at the end of the product's life. Contact
Edwards for advice on how to return the IG40 BA/EX and/or cables for recycling.
WARNING:
Contaminated parts can be detrimental to health and environment.
Before beginning to work, find out whether any parts are contaminated. Follow the
relevant regulations and take the necessary precautions when handling contaminated
parts.
WARNING:
Products or parts thereof (mechanical and electric components, operating fluids, etc.) can
be detrimental to the environment.
Dispose of such substances in accordance with the relevant local regulations.