MKS 340001 User manual

Granville-Phillips®Series 340
Vacuum Gauge Controller
Instruction manual part number 340005
Revision D - November 2014
Series 340
Instruction Manual

Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. A

This Instruction Manual is for use with all Granville-Phillips
Series 340 Vacuum Measurement Controllers. A list of
applicable catalog numbers is provided on the following page.
Granville-Phillips®Series 340
Vacuum Measurement Controller
Series 340
Instruction Manual
© 2014 MKS Instruments, Inc. All rights reserved.
Granville-Phillips®and Convectron®are registered trademarks of MKS Instruments, Inc.
All other trademarks and registered trademarks are the properties of their respective owners.
For Customer Service or Technical Support 24 hours per day,
7 days per week, every day of the year including holidays:
Phone: [phone] or [phone]
MKS, Granville-Phillips Division
6450 Dry Creek Parkway
Longmont, CO 80503 USA
Phone: [phone] or 1-800-776-6543
FAX: [phone]
Email: [email protected]
Corporate Office
MKS Instruments, Inc.
2 Tech Drive, Suite 201
Andover, MA 01810 USA
Phone: [phone]
www.mksinst.com

Granville-Phillips®Series 340 Vacuum Gauge Controller
Catalog numbers for Series 340 Controllers
Controller for one Ionization gauge and two Convectron Gauges, with one-line display,
resistive degas, and remote input/output interface
Half-rack mount: 340501 - # #
Left mount for 19-inch rack: 340502 - # #
Center mount for 19-inch rack: 340503 - # #
Bench-top mount: 340504 - # #
Display options (Measurement units):
Torr T
mbar M
Pascal P
Powercord options:
North America 115 Vac and Japan 100 Vac 1
North America 240 Vac 2
Universal Europe 220 Vac 3
United Kingdom 240 Vac 4
This Instruction Manual is also for use with the following catalog numbers:
340001, 340003, 340004, 340018, 340019, 341579
20340042, 20340045, 20340046, 20340-341-T1, 20340-341-T2, 20340-341-T3

5
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Chapter 1 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Safety Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Equipment Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Implosion / Explosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4 Damage Requiring Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5 Service Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.6 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.7 FCC Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8 Canadian Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 2 Introduction & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.1 Available Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.2 Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Receiving Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.1 Damaged Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 340 VGC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 Electrometer/Ion Gauge Pressure Range Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.3 Convectron®Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.4 Remote Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1 Initial VGC Setup and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.1 Line Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.2 Mounting Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2 Ionization Gauge Types and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2.1 Ion Gauge Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3 Convectron Gauge Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.1 Important Precautions for Gauge Tube Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.2 Gauge Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.3 Compression Mount (Quick Connect). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.4 1/8 NPT Mount. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.5 NW16KF Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.6 Other Mounting Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3.7 Convectron Gauge Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.4 System Grounding Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.4.1 System Ground Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Chapter 4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.1 Series 340 VGC Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.1.1 Sensor Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.2 Power ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.3 Electrometer Module Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.4 Ion Gauge ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.5 Degas ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.6 Remote Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.2 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2.1 Ionization Gauge Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2.2 Convectron Gauge Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table of Contents

6
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
4.3 Convectron Gauge Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.1 Reading Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.2 Special Considerations For Use Below 10-3 Torr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.3 Use With Gases Other Than N2 and Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.4 Indicated vs. True Pressure Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4 Convectron Gauge Module Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Chapter 5 Electrometer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.1 Introduction to the Electrometer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.2 Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.2.1 Display Update Rate Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.3.1 Displaying Sensitivity, Pressure, and Emission with the Calibration Switch . . . . . . . . . . . . . . . . . . 46
5.3.2 Emission Range Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.3.3 Emission Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.3.4 Sensitivity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.3.5 Relative Gas Sensitivities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.3.6 Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.4 Electrometer Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.4.1 Electrometer Minimum Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.4.2 Electrometer Scale Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.4.3 Overpressure Shutdown Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.4.4 A/D Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Chapter 6 Convectron Gauge Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.1 Introduction to the Convectron Gauge Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.2 Units of Measure for a Convectron Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.3 Ionization Gauge Filament Auto Turn ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.4 Process Relay Turn ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.4.1 Setting the Internal CGB & CGA Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.5 Process Relay Turn ON Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.6 Gauge Zero and Atmospheric Pressure Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.6.1 Zero Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.6.2 Atmosphere Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.7 Convectron Gauge Analog Output Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Chapter 7 Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1 Service Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2 Damage Requiring Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.3.1 Power Input Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.3.2 Power Supply Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.3.3 Ionization Gauge Filament Turn ON and Emission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.3.4 Degas Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.3.5 Electrometer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.3.6 Convectron Gauge Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Chapter 8 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

7
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Chapter 1
1Safety Instructions
1.1 Safety Introduction
BEGIN BY READING THESE IMPORTANT THESE SAFETY INSTRUCTIONS AND NOTES and
repeated with additional information at appropriate points in this instruction manual.
Throughout this instruction manual the word “product” refers to the Series 340 Vacuum Gauge
Controller and all of its approved parts and accessories.
NOTE: These instructions do not and cannot provide for every contingency
that may arise in connection with the installation, operation, or maintenance
of this product. If you require further assistance, contact MKS,
Granville−Phillips Division at the address on the title page of this manual.
This product is designed and tested to offer reasonably safe service provided it is installed, operated, and serviced in strict
accordance with these safety instructions.
These safety precautions must be observed during all phases of operation, installation, and service
of this product. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of design, manufacture, and intended use of the instrument. MKS
Instruments, Inc. disclaims all liability for the customer's failure to comply with these requirements.
•Read Instructions – Read all safety and operating instructions before operating the product.
•Retain Instructions – Retain the Safety and Operating Instructions for future reference.
•Heed Warnings – Adhere to all warnings on the product and in the operating instructions.
•Follow Instructions – Follow all operating and maintenance instructions.
•Accessories – Do not use accessories not recommended in this manual as they may be hazardous.
These safety alert symbols in this manual or on the Product rear panel,
mean caution − personal safety, property damage or danger from electric
shock. Read these instructions carefully.
Failure to comply with these instructions may result in serious personal injury,
including death, or property damage.
The service and repair information in this manual is for the use of Qualified Service
Personnel. To avoid shock, do not perform any procedures in this manual or perform
any servicing on this product unless you are qualified to do so.

1 Safety Instructions
8Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
To reduce the risk of fire or electric shock, do not expose this product to rain or
moisture.
Objects and Liquid Entry − Never push objects of any kind into this product
through openings as they may touch dangerous voltage points or short out parts that
could result in a fire or electric shock. Be careful not to spill liquid of any kind onto
the products.
Do not substitute parts or modify the instrument.
Because of the danger of introducing additional hazards, do not install substitute
parts or perform any unauthorized modification to the product. Return the product
to a service facility designated by Ganville−Phillips for service and repair to ensure
that safety features are maintained. Do not use this product if it has unauthorized
modifications.
Replacement Parts − When replacement parts are required, be certain to use the
replacement parts that are specified by Ganville−Phillips or that have the same
characteristics as the original parts. Unauthorized substitutions may result in fire,
electric shock or other hazards.
Safety Check − Upon completion of any service or repairs to this product, ask the
Qualified Service Person to perform safety checks to determine that the product is in
safe operating order.
Finite Lifetime − After ten years of normal use or even non−use, the electrical
insulation in this product may become less effective at preventing electrical shock.
Under certain environmental conditions which are beyond the manufacturer’s
control, some insulation material may deteriorate sooner. Therefore, periodically
inspect all electrical insulation for cracks, crazing, or other signs of deterioration.
Do not use if the electrical insulation has become unsafe.
Be aware that when high voltage is present in any vacuum system, a life threatening
electrical shock hazard may exist unless all exposed conductors are maintained at
earth ground.
This hazard is not peculiar to this product.
Be aware that an electrical discharge through a gas may couple dangerous high
voltage directly to an ungrounded conductor almost as effectively as would a copper
wire connection. A person may be seriously injured or even killed by merely
touching an exposed ungrounded conductor at high potential.
This hazard is not unique to this product.
It is the user's responsibility to ensure that the automatic signals provided by the
product are always used in a safe manner. Carefully check the system programming
before switching to automatic operation.

1 SafetyInstructions
9
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
1.2 Equipment Grounding
1.3 Implosion / Explosion
Glass ionization gauges, if roughly handled, may implode under vacuum causing flying glass which
may injure personnel. If pressurized above atmospheric pressure, glass tubes may explode. A
substantial shield should be placed around vacuum glassware to prevent injury to personnel.
Danger of injury to personnel and damage to equipment exists on all vacuum systems that
incorporate gas sources or involve processes capable of pressurizing the system above the limits it
can safely withstand.
For example, danger of explosion in a vacuum system exists during backfilling from pressurized gas
cylinders because many vacuum devices such as ionization gauge tubes, glass windows, glass bell
jars, etc., are not designed to be pressurized.
Install suitable devices that will limit the pressure from external gas sources to the level that the
vacuum system can safely withstand. In addition, install suitable pressure relief valves or rupture
disks that will release pressure at a level considerably below that pressure which the system can
safely withstand.
Suppliers of pressure relief valves and pressure relief disks can be located via an online search, and
are listed on ThomasNet.com under “Relief Valves” and “Rupture Discs. Confirm that these safety
devices are properly installed before installing and operating the product.
Where an equipment malfunction could cause a hazardous situation, always provide
for fail−safe operation. As an example, in an automatic backfill operation where a
malfunction might cause high internal pressures, provide an appropriate pressure
relief device.
Proper Grounding
All components of a vacuum system used with this or any similar high voltage
product must be maintained at earth ground for safe operation. The power cord of
this product shall be connected only to a properly grounded outlet. Be aware,
however, that grounding this product does not guarantee that other components of
the vacuum system are maintained at Earth ground.
Complying with the usual warning to connect the power cable only to a properly
grounded outlet is necessary but not sufficient for safe operation of a vacuum system
with this or any similar high voltage producing product.
Verify that the vacuum port to which the Ionization Gauge or Convectron Gauge is
mounted is electrically grounded. It is essential for personnel safety as well as proper
operation that the envelope of the gauge be connected to a facility ground. Use a
ground lug on a flange bolt if necessary.
Install suitable devices that will limit the pressure to the level that the vacuum
system can safely withstand. In addition, install suitable pressure relief valves or
rupture disks that will release pressure at a level considerably below the pressure
that the system can safely withstand.

1 Safety Instructions
10 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Confirm that these safety devices are properly installed before installing the product. In addition,
check that:
a. The proper gas cylinders are installed,
b. Gas cylinder valve positions are correct on manual systems, and
c. The automation is correct on automated gas delivery systems.
d. Vacuum gauges with compression fittings may be forcefully ejected if the vacuum system is
pressurized.
Series 275 Convectron gauges are furnished calibrated for N2. They also measure the pressure of air
correctly within the accuracy of the controller.
It is the installer's responsibility to ensure that the automatic signals provided by the product are
always used in a safe manner. Carefully check manual operation of the system and the set point
programming before switching to automatic operation.
Where an equipment malfunction could cause a hazardous situation, always provide for fail-safe
operation. As an example, in an automatic backfill operation where a malfunction might cause high
internal pressures, provide an appropriate pressure relief device.
Series 275 Convectron Gauges should not be used above 1000 Torr true pressure.
If accurate conversion data is not used, or is improperly used, a potential
overpressure explosion hazard can be created under certain conditions.
Do not attempt to use a Series 275 gauge calibrated for N2to measure or control the
pressure of other gases such as argon or CO2unless accurate conversion data for N2
to the other gas is properly used. See Section 4.3.3 on page 35.
If used improperly, Convectron gauges can supply misleading pressure indications
that can result in dangerous overpressure conditions within the system.
Do not operate in an explosive atmosphere.
Do not operate the product in the presence of flammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a definite
safety hazard.
Do not use the product to measure the pressure of explosive or combustible gases or
gas mixtures. The sensor wire of the Convectron Gauge normally operates at only
125 ˚C, but it is possible that Controller malfunction can raise the sensor
temperature above the ignition temperature of combustible mixtures.
Danger of explosion or inadvertent venting to atmosphere exists on all vacuum
systems which incorporate gas sources or involve processes capable of pressurizing
the system above safe limits.
The fumes from solvents such as trichloroethylene, perchloroethylene, toluene, and
acetone can be dangerous to health if inhaled. Use only in well ventilated areas
exhausted to the outdoors. Acetone and toluene are highly flammable and should not
be used near an open flame or energized electrical equipment.

1 SafetyInstructions
11
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
1.4 Damage Requiring Service
Disconnect the product from all power sources and refer servicing to Qualified Service Personnel
under the following conditions:
a. When any cable or plug is damaged.
b. If any liquid has been spilled onto, or objects have fallen into, the product.
c. If the product has been exposed to rain or water.
d. If the product does not operate normally even if you follow the operating instructions. Adjust
only those controls that are covered by the operation instructions. Improper adjustment of other
controls may result in damage and will often require extensive work by a qualified technician to
restore the product to its normal operation.
e. If the product has been dropped or the enclosure has been damaged.
If the product exhibits a distinct change in performance, service may be required.
1.5 Service Guidelines
If the product requires service, contact the MKS, Granville-Phillips Division Customer Service
Department at [phone] or [phone] for troubleshooting help over the phone.
If the product must be returned to the factory for service, request a Return Material Authorization
(RMA) from Granville-Phillips. Do not return products without first obtaining an RMA. In some
cases a hazardous materials document may be required. The MKS/Granville-Phillips Customer
Service Representative will advise you if the hazardous materials document is required.
When returning a products to Granville-Phillips, be sure to package the products to prevent
shipping damage. Circuit boards and modules separated from the gauge assembly must be handled
using proper anti-static protection methods and must be packaged in anti-static packaging.
Granville-Phillips will supply return packaging materials at no charge upon request. Shipping
damage on returned products as a result of inadequate packaging is the Buyer's responsibility.
For Customer Service or Technical Support 24 hours per day, 7 days per week, every day of the year
including holidays:
Phone: [phone] or [phone]
Email:[email protected]
MKS, Granville-Phillips Division
6450 Dry Creek Parkway
Longmont, CO 80503 USA
Phone: [phone] or 1-800-776-6543
FAX: [phone]

1 Safety Instructions
12 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
1.6 Warranty Information
MKS Instruments/Granville-Phillips provides an eighteen (18) month warranty from the date of
shipment for new Granville-Phillips Products. The MKS Instruments, Inc. General Terms and
Conditions of Sale provides the complete and exclusive warranty for Granville-Phillips products.
This document may be located on our web site at www.mksinst.com, or may be obtained by
contacting an MKS, Granville-Phillips Division Customer Service Representative.
1.7 FCC Verification
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with this instruction manual, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio or television technician for help.
1.8 Canadian Users
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numerique de la classe B respecte toutes les exigences du Reglement sur le material
broilleur du Canada.

13
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Chapter 2
2Introduction & Specifications
2.1 General Description
The Series 340 Vacuum Gauge Controller (VGC) measures pressures from less than 1 x 10-9 Torr
(1.3 x 10-9 mbar or 1.3 x 10-7 pascal) to atmosphere by use of a single ionization gauge and two
Convectron®Gauges. Pressure readout is via a front panel display and analog outputs. Resistance
heating degas is standard. An interlock is provided to allow degas only when the ion gauge tube is
ON and the displayed pressure is below 5 x 10-5 Torr. Pressure reading during degas is not possible.
The 340 VGC is a modular instrument with infrequently used controls housed behind a hinged front
panel, thus reducing front panel clutter and allowing the VGC to reside in a half-rack space.
2.1.1 Available Options
2.1.1.1 Remote Input/Output
The 340 VGC can be ordered with a factory installed remote I/O option which provides an ion
gauge (IG) status relay, remote gauge on/off input and remote degas on/off input functions.
2.1.1.2 Process Control Relays
The 340 VGC can be ordered with a factory installed process relay option which provides
automatic ion gauge turn-ON from Convectron channel "1" and a Convectron Gauge process relay
output that is user selectable to operate from channel "1" or "2".
2.1.1.3 Ion Gauge Cables
The VGC is capable of operating an ion gauge located up to 50 feet away from the controller by
using standard cables. Degas power delivered to the gauge decreases with cable length. Cables are
available for use with glass or nude Bayard Alpert (B-A) gauges.
2.1.2 Mounting Options
The 340 VGC can be ordered with a variety of mounting options to fit your needs. This includes half
rack (standard), full rack, or bench mounting. See Figure 3-2 on page 20 for dimensional
illustrations.
2.2 Receiving Inspection
Inspect all material received for shipping damage. Confirm that your shipment includes all material
and options ordered. If materials are missing or damaged, the carrier that made the delivery must be
notified within 15 days of delivery in accordance with Interstate Commerce regulations in order to
file a valid claim with the carrier.
2.2.1 Damaged Material
Any damaged material, including all containers and packaging, should be held for carrier
inspection. If your shipment is not correct for reasons other than shipping damage, contact our
Customer Service Department, 6450 Dry Creek Parkway, Longmont, Colorado 80503, phone
[phone], email [email protected].

2Introduction & Specifications
14 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Figure 2-1 Front of Series 340 Vacuum Gauge Controller
Figure 2-2 Rear of Series 340 Vacuum Gauge Controller
Power Supply / Ion Gauge
Connector / Remote I-O PCB
Convectron Gauge Module
PCB (See Chapter 6)
Electrometer Module
PCB (See Chapter 5)
Ion Gauge Remote I/O 9-pin
Connector (See Remote
Input/Output on page 32)

2Introduction & Specifications
15
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
2.3 Specifications
2.3.2 Electrometer/Ion Gauge Pressure Range Specifications
An internal overpressure limiter is factory adjusted to trip at a pressure of 1 decade below the upper
limits specified above. Refer to Section 5.4.3 for readjustment instructions.
2.3.1 340 VGC Specifications
Table 2-1 Series 340 VGC Physical Specifications
Parameter Specification
Width 24.13 cm (9.5 in.) with 1/2-rack mounting brackets
Height 8.89 cm (3.5 in.)
Depth 35.56 cm (14 in.) includes 7.62 cm (3 in.) for connectors and cables
Weight 4.8 kg (10.5 lb.)
Environmental Temperature 0 oC to 40 oC
Table 2-2 Series 340 VGC Electrical Specifications
Parameter Specification
Voltage 90-130 VAC or 200-260 VAC
Frequency 50 to 60 Hz
Power 100 watts max
Fuse Ratings 1.25 A (90-130 V)
.60 A (200-260 V)
Table 2-3 Emission Range for Non UHV Ion Gauges
.01mA to .1mA .1mA to 1mA 1mA to 10mA
1 x 10-7 to 1 x 10-1 Torr 1 x 10-8 to 1 x 10-2 Torr 1 x 10-9 to 1 x 10-3 Torr

2Introduction & Specifications
16 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
2.3.3 Convectron®Specifications
Table 2-4 Pressure Display Specifications
Parameter Specification
Electronic Accuracy Typical ± 3% of reading at ambient temperature of 25 ± 5 oC
Display Units Torr unless otherwise requested. Adjustment and internal selector switch provides readout
in mbar or pascal.
Display Resolution Scientific notation, 2 significant digits.
Display Update Time 0.5 sec. typical as shipped. Internal switch selectable to 3 sec. reading averaged.
Table 2-5 Electrometer/Ion Gauge Specifications
Parameter Specification
Sensitivity 3/Torr to 50/Torr (the factory setting is 10/Torr)
Emission Current 10 µA to 10 mA in 3 decade ranges (factory setting is 1 mA)
Collector Potential 0 Vdc
Grid Potential +180 Vdc
Filament Potential +30 Vdc
Degas I2R: 8 VAC, 10 A maximum
Analog Output 0-10 Vdc; Logarithmic; 1 V/decade
Table 2-6 Convectron Gauge Specifications
Parameter Specification
Gauge Type Granville-Phillips Series 275
Pressure Range 1 x 10-4 Torr to 990 Torr, N2 equivalent
Gas Type N2, Air
Maximum Gauge Temperature +150 oC
Gauge Operating Temperature +4 oC to +50 oC

2Introduction & Specifications
17
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
2.3.4 Remote Input/Output
Table 2-7 Convectron Module Specifications
Parameter Specification
Display Resolution 2 significant digits (1 significant digit in the 10-4 decade)
Analog Output Nonlinear 0 to 5.3 Vdc (+5% corresponding to 0 to 1000 Torr)
Display Update Time 0.5 sec. typical. Switchable to 3 sec./ reading average
Ion Gauge Turn ON Range OFF, 5 mTorr to 50 mTorr
Process Relay Setting
Max switched power
Max switched current
Max switched voltage
Contact rating
Resistive load.
30 W or 60 VA
2 A
30 Vdc or 300 VAC
1 A at 30 Vdc, 0.5 A at 125 VAC
Process Relay Turn ON Range OFF, 5 mTorr to 200 mTorr
Table 2-8 Remote I/O Specifications
Parameter Specification
Gauge and Degas On/Off Inputs Less then 0.4 V @ 10 µA for 25 msec (min). Must go to greater than 3.5
V for 105 msec (min) before next low state.
Filament Status Relay Contact Rating 4 A, 250 VAC resistive load or 30 Vdc.

2Introduction & Specifications
18 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
NOTES:

19
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Chapter 3
3Installation
3.1 Initial VGC Setup and Installation
3.1.1 Line Voltage Selection
Verify that the line voltage selector card displays the line voltage value of the available local AC line
voltage. If the card does not display the correct line voltage value as shown in Table 3-1, perform
the following procedure and refer to Figure 3-1.
1. On the rear panel (lower right), slide the cover over fuse F2 to the left.
2. Remove the fuse (F2) by pulling the fuse extractor tab FUSE PULL outward and to the left.
Leave the extractor tab in the full-left position.
3. Use a pointed tool or small wire hook to extract the line selector card from its holder and pull
the card straight out.
4. Reinsert the card so that the correct line voltage (100, 120, 220, or 240V) as shown in Figure
3-1 is readable from the rear of the VGC.
.
5. Verify that fuse F2 is the correct value as shown in Table 3-1. Position the fuse extractor tab
FUSE PULL to the right-hand position and install the fuse (F2) in the fuse holder.
6. Slide the cover to the right over the fuse.
Table 3-1 Selector Card Line Voltage Settings and Fuse Selection
Line Voltage Setting (VAC) Setting Selector Card Fuse F2 Type
90-105 100 1.25A SB
105-130 120 1.25A SB
200-230 220 .60A SB
230-260 240 .60A SB
Figure 3-1 Line Voltage Selector on the rear of the 340 VGC
Operation of the Series 340 Vacuum Gauge Controller with the line voltage
selector card improperly set can cause damage to the Controller and injury to
personnel.

3 Installation
20 Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
3.1.2 Mounting Configurations
Figure 3-2 illustrates the various configurations available for mounting the Series 340 Vacuum
Gauge Controller.
NOTE: The 340 controller should be mounted in a location with free air flow
and ambient temperature less than 40 oC.
Figure 3-2 340 VGC Mounting Configurations
340501-##
340502-##
340503-##