Edwards CG16K User manual

D35610880
Issue H
Original
Instruction Manual
CG16K Barometrically Compensated
Capsule Dial Gauge
Description Item Number
CG16K Capsule Dial Gauge, 0 to 1040 mbar D35610000
CG16K Capsule Dial Gauge, 0 to 125 mbar D35611000
CG16K Capsule Dial Gauge, 0 to 50 mbar D35612000
CG16K Capsule Dial Gauge, 0 to 25 mbar D35613000
CG16K Capsule Dial Gauge, 0 to 760 Torr D35630000
CG16K Capsule Dial Gauge, 0 to 100 Torr D35631000
CG16K Capsule Dial Gauge, 0 to 40 Torr D35632000
CG16K Capsule Dial Gauge, 0 to 20 Torr D35633000

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© Edwards Limited 2019. All rights reserved. Page i
Contents
D35610880 Issue H
Contents
Section Page
1 Introduction ....................................................................................... 1
1.1 Scope and definitions ................................................................................................... 1
1.2 Description ................................................................................................................ 1
1.3 Construction .............................................................................................................. 1
2 Technical Data .................................................................................... 3
2.1 Mechanical Data ......................................................................................................... 3
2.2 Performance .............................................................................................................. 3
3 Installation ......................................................................................... 5
3.1 Unpack and inspect ...................................................................................................... 5
3.2 Fit the Capsule Dial Gauge ............................................................................................. 5
3.3 Connect to the vacuum system ........................................................................................ 5
3.4 Leak-test the installation ............................................................................................... 5
4 Operation .......................................................................................... 7
5 Maintenance ....................................................................................... 9
5.1 Repairs .................................................................................................................... 9
5.2 Calibration ................................................................................................................ 9
6 Storage and Disposal ........................................................................... 11
6.1 Storage ...................................................................................................................11
6.2 Disposal ...................................................................................................................11
7 Spares and Accessories ........................................................................ 13
7.1 Introduction .............................................................................................................13
7.2 Accessories ...............................................................................................................13
For return of equipment, complete the HS Forms at the end of this manual.
Illustrations
Figure Page
1 Dimensions of panel mounted CG16K (mm) ......................................................................... 3
Associated publications
Publication title Publication number
Vacuum pump and vacuum system safety P40040100
CG092019

D35610880 Issue H
Page ii © Edwards Limited 2019. All rights reserved.
Contents
Trademark credits
Edwards and the Edwards logo are trademarks of Edwards Limited, Innovation Drive, Burgess Hill,
West Sussex, RH15 9TW, UK.

© Edwards Limited 2019. All rights reserved. Page 1
Introduction
D35610880 Issue H
1 Introduction
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards CG16K Capsule Dial
Gauge. You must use the Capsule Dial Gauge as specified in this manual.
Read this manual before you install and operate the Capsule Dial Gauge. Important safety information is highlighted
as WARNING and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is
defined below.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and process.
The following IEC warning labels appears on the CG16K:
The units used throughout this manual conform to the SI international system of units of measurement.
1.2 Description
The CG16K Capsule Dial Gauge measures the total absolute pressure of gas in your vacuum system. The composition
of the gas does not affect the measurement; the CG16K Capsule Dial Gauge is therefore useful in applications where
you need to measure the pressure of gases other than air.
The CG16K Capsule Dial Gauge is barometrically compensated, so that pressure measurements are unaffected by the
ambient atmospheric pressure. This is useful when you need to measure low pressures.
1.3 Construction
Internally, the CG16K has a sealed, evacuated capsule with a mechanical linkage which operates the pointer on the
dial. The capsule is enclosed in the case of the gauge.
The case is open to the vacuum system and is sealed from the atmosphere by a sealing ring, which is clamped under
the safety glass by a screwed bezel.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Warning - refer to accompanying documentation.

D35610880 Issue H
Page 2 © Edwards Limited 2019. All rights reserved.
Technical data
2 Technical data
2.1 Mechanical data
2.2 Performance
Figure 1 - Dimensions of panel mounted CG16K (mm)
Dimensions See Figure 1
Mass 0.9 kg
Vacuum connection NW16
Internal volume 160 cm3
Materials exposed to vacuum Aluminium, Inconel, glass, Fluoroelastomer, Nical,
copper alloy
Operating temperature range 10 to 50 ºC
Accuracy at 20 ºC ± 2% of full-scale deflection
Leak rate into gauge at a differential pressure
of 1 bar
< 1 x 10-5 ls-1
Maximum internal pressure 1 bar gauge (2 bar absolute)

© Edwards Limited 2019. All rights reserved. Page 3
Installation
D35610880 Issue H
3 Installation
3.1 Unpack and inspect
Remove all packing materials and protective covers and check the CG16K Capsule Dial Gauge.
If the CG16K Capsule Dial Gauge is damaged, notify your supplier and the carrier in writing within three days; state
the Item Number of the gauge together with your order number and your supplier’s invoice number. Retain all
packing materials for inspection. Do not use the gauge.
If the CG16K is not to be used immediately, replace the protective covers. Store the CG16K in suitable conditions as
described in Section 6.1.
3.2 Fit the Capsule Dial Gauge
Fit the CG16K as close as possible to the point in the vacuum system at which you wish to measure the pressure. Do
not use a narrow pipeline or incorporate angled connections, as these may cause errors in the pressure measurement.
You can fit the CG16K so that it is supported by the vacuum connection. If you fit the CG16K in this way, make sure
that the pipeline which connects the CG16K to the vacuum system is as short as possible and that very little vibration
can be transmitted to the gauge.
Alternatively, you can fit the CG16K so that it is panel mounted. If you wish to fit the CG16K on a panel, the panel
must be at least 2 mm thick. Use the procedure below.
1. Cut a 111 to 112 mm diameter hole in the panel where you wish to locate the gauge.
2. Push the rear of the CG16K through the hole and fit the clamp over the bolts as shown in Figure 1.
3. Secure the CG16K in place with the two wing-nuts.
3.3 Connect to the vacuum system
Note: If you need to connect the CG16K to an SC5 connection, you must use the accessories listed in Section 7.2.
The CG16K has an NW16 flange. Use the NW16 fittings to connect the CG16K to the vacuum system.
Alternatively, use the procedure below to connect the CG16K to 6 mm copper pipe:
1. Unscrew and remove the NW16 flange from the body of the CG16K.
2. Fit a 6 mm pipe union (available as an accessory, see Section 7.2) to the body of the CG16K.
3. Braze the brass tail piece of the pipe union to the 6 mm copper pipe in your system.
3.4 Leak test the installation
Leak test the vacuum system after you have installed the CG16K. Hazardous substances which leak from the system
may be dangerous to personnel and there may be a danger of explosion if air leaks into the system.
WARNING
Leak test the vacuum system after installation of the CG16K to prevent leakage of hazardous
substances out of the system and leakage of air into the system.

D35610880 Issue H
Page 4 © Edwards Limited 2019. All rights reserved.
Operation
4 Operation
CAUTION
Dust or solid particles in the vacuum system can enter the gauge mechanism and cause the CG16K to
malfunction.
CAUTION
Do not use the CG16K to measure the pressure of process gases which are corrosive or have a high concentration
of water vapour. If you do, you may get incorrect pressure measurements and you may damage the CG16K.
Once you have installed the CG16K as described in Section 3, the measurement shown on the dial of the CG16K will
indicate the total pressure in your vacuum system.
WARNING
Do not allow the internal pressure to be higher than 1 bar gauge (2 bar absolute). If the pressure
in your system can be higher than 1 bar gauge, you must fit a suitable pressure relief valve.

© Edwards Limited 2019. All rights reserved. Page 5
Maintenance
D35610880 Issue H
5 Maintenance
5.1 Repairs
The CG16K Capsule Dial Gauge contains no parts which can be serviced by the user.
An exchange/replacement service is available, if your gauge is damaged; contact your supplier or your nearest
Edwards company for information.
5.2 Calibration
The CG16K Capsule Dial Gauge must be calibrated regularly to maintain the accuracy (specified in Section 2.2).
A calibration service is available; contact your supplier or your nearest Edwards company for information.

D35610880 Issue H
Page 6 © Edwards Limited 2019. All rights reserved.
Storage and Disposal
6 Storage and Disposal
6.1 Storage
Store the CG16K Capsule Dial Gauge in cool, dry conditions until required for use. When required, prepare and install
the CG16K as described in Section 3.
6.2 Disposal
Dispose of the CG16K Capsule Dial Gauge and any components removed from it safely in accordance with all local
and national safety and environmental requirements.

© Edwards Limited 2019. All rights reserved. Page 7
Spares and Accessories
D35610880 Issue H
7 Spares and Accessories
7.1 Introduction
Edwards products, spares and accessories are available from Edwards companies in Belgium, Brazil, Canada, France,
Germany, Hong Kong, Italy, Japan, Korea, Switzerland, United Kingdom, U.S.A., and a world wide network of
distributors. The majority of these centres employ Service Engineers who have undergone comprehensive Edwards
training courses.
Order spare parts and accessories from your nearest Edwards company or distributor. When you order, please state
for each part required:
Model and Item Number of your equipment
Serial number (if any)
Item Number and description of part
7.2 Accessories
The accessories listed below allow you to connect the CG16K Capsule Dial Gauge directly to an SC5 fitting; you do
not need to make any brazed joints.
The accessory listed below allows you to connect the CG16K Capsule Dial Gauge to 6 mm copper pipe.
7.2.1 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 Edwards.
Note: If we do not receive a completed HS2 form, your equipment cannot be serviced.
Product Item Number
SC5 to NW10 adapter C10511435
NW10/16 Co-seal B27158426
NW10/16 Clamping ring C10512401
Product Item Number
6 mm pipe union D35610201

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