Brooks Granville-Phillips Convectron 316 Series User manual

Series 316
Granville-Phillips®Series 316 Convectron®®
Vacuum Measurement Controller
Instruction Manual
Instruction manual part number 316005
Revision B - December 2012

MANUAL P/N 316005 REV: B 3
Series 316
Series 316
Granville-Phillips®Series 316 Convectron®®
Vacuum Measurement Controller
Customer Service/Support
For customer service within the USA, 8 AM to 5 PM
Mountain Time Zone, weekdays excluding holidays:
Granville-Phillips
6450 Dry Creek Parkway
Longmont, CO 80503 USA
Phone: [phone]
Phone: [phone]
FAX: [phone]
Email: [e-mail]
Brooks Automation, Inc.
15 Elizabeth Drive
Chelmsford, MA 01824 USA
Phone: [phone]
For customer service, 24 hours per day, 7 days per week,
every day of the year including holidays within the USA:
Phone [phone]
World Wide Web: www.brooks.com
Instruction Manual
© 2012 Brooks Automation, Inc. All rights reserved.
Granville-Phillips®and Convectron®are registered trademarks of Brooks
Automation, Inc. All other trademarks and registered trademarks are the
properties of their respective owners.

4MANUAL P/N 316005 REV:B
Catalog numbers Series 316 Convectron Vacuum Gauge Controller with 3-Line Display
This Instruction Manual is for use with all Granville-Phillips Series 316 Vacuum Measurement
Controllers listed below. The “#” symbol represents a variable in the catalog number.
Configured for Convectron Gauge on Channel A
Half-rack mount 316501 - # # # - # #
Left mount for 19-inch rack 316502 - # # # - # #
Center mount for 19-inch rack 316503 - # # # - # #
Bench top configured for Convectron Gauge 316504 - # # # - # #
Configured for Thermocouple Gauge on Channel A
Half-rack mount 316505 - # # # - # #
Left mount for 19-inch rack 316506 - # # # - # #
Center mount for 19-inch rack 316507 - # # # - # #
Bench top configured for Thermocouple Gauge 316508 - # # # - # #
Interface Options (Slot X):
None 0
RS-232 A
RS-485 B
IEEE 488 C
Linear Analog Output D
Gauge Options (Slot Y):
None 0
Dual Convectron 1
Convectron / Capacitance Manometer 2
Dual Thermocouple 3
Setpoint Options (Slot XZ):
None 0
2 setpoint relays for Channel A A
6 setpoint relays, 2 per channel B
Display Options (Measurement Units):
Torr T
Mbar M
PA P
Power Cord Options (Slot XZ):
North America 115 V 1
North America 240 V 2
Universal Europe 220 V 3
United Kingdom 240 V 4

MANUAL P/N 316005 REV: B 5
Table of Contents
Safety Instructions...........................................7
Receiving Inspection .......................................8
International Shipment ....................................8
Limited Warranty .............................................8
Chapter 1 - 316 VGC Control Unit
1.1 Introduction/General Description..............9
1.1.1 Available Configurations ....................9
1.2 Installation ..............................................10
1.2.1 Line Voltage Selection .....................10
1.2.2 Module Installation ...........................10
1.2.3 To Install a Module...........................11
1.3 Mounting Configurations ........................13
1.4 Cable Connections .................................13
1.4.1 Instrument Grounding .......................14
1.5 Operation................................................14
1.5.1 Summary of Controls and Indicators14
1.5.2 Units of Measure..............................14
1.6 Theory of Operation ...............................15
1.6.1 Microcontrollers and Bus Structure..15
1.6.2 Convectron Gauge Theory...............15
1.6.3 Capacitance Manometer Theory......15
1.7 Calibration ..............................................16
1.8 Basic Troubleshooting............................16
1.8.1 Guidelines ........................................16
1.8.2 Troubleshooting Guide.....................17
1.9 Repair Ordering......................................17
1.10 Specifications (316 Vacuum Gauge
Controller).........................................18
Service Form .................................................19
Chapter 2 - Convectron Gauge Module
2.1 Safety Notices ........................................20
2.1.1 Explosive Gases ..............................20
2.1.2 Limitation on Use of Compression
Mounts.................................................20
2.1.3 Gauge Tube Mounting Position........20
2.1.4 Overpressure ...................................20
2.1.5 High Indicated Pressure...................20
2.1.6 Chemicals ........................................20
2.1.7 Sensor Failure..................................21
2.1.8 Gauge Tube Contamination.............21
2.2 Convectron Module, Introduction ...........21
2.2.1 Units of Pressure Measurement ......21
2.3 Convectron Gauge Tube Installation......22
2.3.1 Gauge Tube Orientation ..................23
Compression Mount (Quick Connect) ....23
1/8 NPT Mount........................................23
NW16KF Flange Mount ..........................24
Other Mounting Options..........................24
2.4 Convectron Gauge Operation ................24
2.4.1 Reading Pressure ............................24
Special Considerations For Use Below
10-3 Torr ...........................................24
Use With Gases Other Than N2and Air.24
Indicated vs. True Pressure Curves .......25
2.4.2 Analog Output ..................................33
2.5 Convectron Gauge Calibration and
Maintenance.....................................34
2.5.1 Zero Adjustment (VAC)....................34
2.5.2 Atmosphere Adjustment (ATM) .......34
2.5.3 Analog Output Full Scale Adjustment34
2.5.4 Analog Output Offset; Gauges A, B,
and C ...................................................34
2.5.4 Cleaning the Gauge Tube................35
2.6 Theory of Operation ...............................36
2.7 Convectron Gauge Troubleshooting ......36
2.7.1 Transducer Test Procedure .............36
2.7.2 Convectron Troubleshooting Guide .37
2.8 Convectron Gauge Specifications..........38
Display Resolution .....................................38
Chapter 3 - Thermocouple Gauge Module
3.1 Introduction ............................................39
3.2 Thermocouple Gauge Module
Installation ........................................39
3.2.1 Units of Measure..............................39
3.3 Thermocouple Gauge Tube
Installation ........................................40
3.4 Thermocouple Gauge Operation ...........40
3.4.1 Reading Pressure ............................40
3.4.2 Analog Output ..................................40
3.5 Thermocouple Gauge Calibration ..........41
3.5.1 Zero Adjustment (VAC)....................41
3.5.2 Atmosphere Adjustment (ATM) .......41
3.6 Theory of Operation ...............................42
3.7 Thermocouple Gauge
Troubleshooting ...............................43
3.7.1 Troubleshooting Guide.....................43
3.8 Thermocouple Gauge Specifications .....44
Display Resolution .....................................44
Chapter 4 - Capacitance Manometer Module
4.1 Introduction ............................................45
4.2 Installation ..............................................45
Units of Measure........................................45
Display Slow Update Rate Switch..............46
Convectron Gauge Controls ......................46
Capacitance Manometer Vacuum
Calibration ...........................................46
Capacitance Manometer Range Switch.....46
4.3 Capacitance Manometer Cable
Installation ........................................46
4.4 Operation ...............................................47

6MANUAL P/N 316005 REV: B
4.4.1 Reading Pressure ............................47
4.4.2 Analog Output ..................................47
4.5 Calibration ..............................................48
4.5.1 Initial Transducer Calibration ...........48
To Set The Controller Zero (Initial
Controller Setup) ..............................48
To Zero The 316 VGC with the
Transducer .......................................48
4.5.2 Convectron Controls ........................49
4.5.3 Capacitance Manometer Analog
Output Offset Adjust ............................49
4.5.4 Capacitance Manometer Analog
Output Full-Scale Adjust......................49
4.5.5 Capacitance Manometer Full-Scale
Adjust...................................................49
4.6 Theory of Operation ...............................49
4.7 Capacitance Manometer
Troubleshooting................................50
4.8 Specifications .........................................50
Chapter 5 - Process Control Module
5.1 Safety Notices ........................................51
5.1 Introduction.............................................51
5.2 Process Control Module Installation.......51
5.2.1 Process Control System
Connections.........................................51
5.3 Process Control Operation ....................52
5.3.1 Setpoint Display and Adjustment .....52
To Display a Setpoint..............................53
To Modify a Setpoint ...............................53
5.3.2 Points to Consider in Using the
Process Control Module ......................53
Relay Polarity Setting..............................54
5.3.3 Manual Override...............................55
5.4 Process Control Theory of Operation.....55
5.5 Process Control Troubleshooting...........55
5.6 Process Control Specifications ..............55
Chapter 6 - RS-232 Module
6.1 Introduction.............................................56
6.2 RS-232 Installation .................................56
6.2.1 Selecting the Byte Format................56
6.2.2 Baud Rate ........................................56
6.2.3 Character Framing ...........................56
6.2.4 Talk-Only Mode................................57
6.2.5 Handshake Line Control Switches ...57
6.2.6 Invert RTS Switch ............................57
6.3 Operation................................................57
6.3.1 Command Syntax ............................58
6.4 RS-232 Theory of Operation ..................59
Handshaking ..............................................59
6.5 RS-232 Troubleshooting ........................60
6.5.1 RS-232 Troubleshooting Guide .......60
6.6 RS-232 Specifications ............................61
Chapter 7 - IEEE 488 Module
7.1 Introduction ............................................62
7.2 IEEE 488 Installation ..............................62
7.2.1 Selecting the Interface Bus Address 62
Talk-Only Mode..........................................63
SRQ Mode .................................................63
7.3 IEEE 488 Operation ...............................63
7.3.1 Command Syntax ............................63
7.4 IEEE 488 Troubleshooting .....................64
7.5 IEEE 488 Troubleshooting Guide...........65
7.5 IEEE 488 Specifications........................65
Chapter 8 - RS-485 Module
8.1 Introduction ............................................66
8.2 RS-485 Installation.................................66
8.2.1 RS-485 Address...............................66
8.2.2 Response Delay for the RS-485
Interface ..............................................67
8.2.3 Selecting the Byte Format for RS-
485 Communications...........................67
8.2.4 Character Framing for the RS-485
Computer Interface..............................67
8.2.5 Connecting the RS-485 Computer
Interface ..............................................67
8.2 .6 Preparing for Use............................69
8.3 RS-485 Command Syntax .....................70
8.4 RS-485 Troubleshooting ........................71
8.4.1 Troubleshooting Guide.....................71
8.5 RS-485 Specifications............................71
Chapter 9 - Linear Analog Output Module
9.1 Introduction ............................................72
9.2 Installation ..............................................72
9.2.1 Cable Connections...........................72
Pin Assignments.....................................72
9.3 Operation ...............................................72
9.4 Calibration ..............................................72
9.4.1 Gauge Output Zero Adjust...............73
9.4.2 Gauge Output Full Scale Adjust.......73
9.5 Theory of Operation ...............................74
9.6 Troubleshooting .....................................74
9.7 Specifications .........................................74
Thermocouple Output.............................74

MANUAL P/N 316005 REV: B 7
Safety Instructions and General Information
Be sure to read through this instruction manual before installing, using, or servicing this equipment.
If you have any questions or doubts about how to use this equipment safely, contact the Brooks
Automation, Inc. Customer Service Department listed at the front of this manual.
Danger – Hazardous Voltage
AC line voltage is present within the controller chassis. Disconnect the power cable before removing the
cover. Exercise caution when operating the controller with covers off. Servicing should be performed by
qualified personnel only.
Danger – Explosive Gases
Do not use Series 316 instruments when there is danger of explosion from ignition of explosive or
combustible gases or gas mixtures. The sensor wire of the Series 275 transducers normally operates at only
125 oC, but it is possible that momentary transients or controller malfunction can raise the sensor
temperature above the ignition temperature of combustible mixtures. Thermocouple gauge transducers also
operate at elevated temperatures, and the same safety considerations apply.
Danger – Implosion or Explosion
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 are listed in Thomas Register under "Valves,
Relief", and "Discs, Rupture".
Confirm that these safety devices are properly installed before installing the 316 Vacuum Gauge Controller
(VGC). In addition, check that (1) the proper gas cylinders are installed, (2) gas cylinder valve positions are
correct on manual systems, and (3) the automation is correct on automated systems.
General Warnings
Improper wiring, programming or operation of the system can result in equipment damage or personnel
injury. To avoid these possibilities:
xProgram the setpoints for fail-safe operation. Use the setpoint pressure, gauge assignment and
polarity setting to provide safe operation in the event of equipment or power failure.
xLabel setpoints on the controller front panel to avoid confusion and allow safe manual operation.
xVerify system operation by manually stepping through the control sequence before switching to
automatic control. Check that a malfunction in the sequence cannot produce a hazard.
xInstall safety devices in the system to limit hazardous conditions. For example, a pressure relief
device should be installed on any system using a high pressure gas source.
xRestrict manual operation of the process controls to knowledgeable persons.
Operation of the 316 Vacuum Gauge Controller with line voltage other than that selected by the power supply
internal jumpers can cause damage to the instrument and injury to personnel.
The fumes from trichloroethylene, perchloroethylene, toluene, and acetone can be dangerous to health if
inhaled. They should be used 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.

8 MANUAL P/N 316005 REV: B
Receiving Inspection
On receipt of your equipment, inspect all material for damage. Confirm that the shipment includes all items
ordered. If items are missing or damaged, submit a claim as stated below for a domestic or international
shipment, whichever is applicable.
If materials are missing or damaged, the carrier that made the delivery must be notified within 15 days of
delivery, or in accordance with Interstate Commerce regulations for the filing of a claim. Any damaged
material including all containers and packaging should be held for carrier inspection. Contact our Customer
Service Department, 6450 Dry Creek Pkwy, Longmont, Colorado 80503, telephone [phone], if your
shipment is not correct for reasons other than shipping damage.
International Shipment
Inspect all materials received for shipping damage and confirm that the shipment includes all items ordered.
If items are missing or damaged, the airfreight forwarder or airline making delivery to the customs broker
must be notified within 15 days of delivery. The following illustrates to whom the claim is to be directed.
xIf an airfreight forwarder handles the shipment and their agent delivers the shipment to customs,
the claim must be filed with the airfreight forwarder.
xIf an airfreight forwarder delivers the shipment to a specific airline and the airline delivers the
shipment to customs, the claim must be filed with the airline.
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 Pkwy, Longmont, Colorado 80503, USA, or telephone [phone].
Limited Warranty
This Brooks Automation Inc./Granville-Phillips product is warranted against defects in materials and
workmanship for 18 months from the date of shipment provided the installation, operating and preventive
maintenance procedures specified in this instruction manual have been followed. Brooks Automation Inc. will,
at its option, repair, replace or refund the selling price of the product if Brooks Automation Inc. determines, in
good faith, it is defective in materials or workmanship during the warranty period, provided the item is
returned to Brooks Automation Inc. together with a written statement of the problem.
Defects resulting from or repairs necessitated by misuse or alteration of the product or any cause other than
defective materials or workmanship are not covered by this warranty. Brooks Automation Inc. expressly
disclaims any other warranty whether expressed or implied, including but not limited to the implied warranties
of merchantability and fitness for a particular purpose. Under no circumstances shall Brooks Automation, Inc,
be liable for consequential or other damages resulting from a breach of this limited warranty.

MANUAL P/N 316005 REV: B 9
Chapter 1 - The 316 VGC Control Unit
1.1 Introduction/General Description
The Series 316 Vacuum Gauge Controller (VGC) measures pressures from 1 x 10-4 Torr (1 x 10-4 mbar or 1
x 10-2 pa) to atmosphere, depending on the transducers used.
Modules are available to operate Convectron, capacitance manometer, and thermocouple gauges with three
pressures displayed simultaneously.
Pressure readout is via 3 front panel displays, analog output, and available computer interface.
The 316 VGC is a modular instrument which can be easily customized to fit most user's exact needs.
Infrequently used controls are housed behind a hinged front panel, reducing front panel clutter and allowing
the control unit to reside in a half-rack space.
1.1.1 Available Configurations
Convectron Gauge (CG) Module (Chapter 2)
Permits pressure measurements from 1 x 10-4 to 999 Torr of N2from up to three Granville-Phillips Series 275
Convectron Gauges simultaneously. Provides analog output of each indicated pressure.
Thermocouple Gauge (TC) Module (Chapter 3)
Provides the same functions as the Convectron module, but pressure measurement range is 1 x 10-3 Torr to
1TorrofN
2.
Capacitance Manometer Module (Chapter 4)
Provides gas-type independent pressure measurement from 1 x 10-4 to 999 Torr depending on the
manometer head being used. Allows local range, zero and full scale adjustments and provides power to the
transducer. Readout for one Convectron gauge with features as described above is included along with
analog outputs for both gauges.
Process Control Module (Chapter 5)
Provides 2 or 6 channels of single pole, double throw relays:
Two channels are associated with each gauge pressure indication. Digital setpoints have switch-selectable
polarity for relay activation above or below setpoint. Manual override switches are built-in.
RS-232 Computer Interface Module (Chapter 6)
Provides readout of pressure and process control relay status.
IEEE 488 Computer Interface Module (Chapter 7)
Provides readout of pressure and process control relay status.
RS-485 Computer Interface Module (Chapter 8)
Provides readout of pressure and process control relay status.
Linear Analog Output Module (Chapter 9)
Provides three, zero to +10 Vdc, linearized voltages that correspond to the displayed pressure readings of the
316 Vacuum Gauge Controller.

10 MANUAL P/N 316005 REV: B
1.2 Installation
1.2.1 Line Voltage Selection
Line voltages of 90-110 or 105-125 or 220-240 volts are user selectable via jumpers on the power supply PC
board within the controller. The factory preset line voltage and fuse rating are marked on the rear panel.
Compare your unit to Figure 1-1 to determine if it is configured for your requirements. Do not apply power
until the correct configuration is achieved.
Figure 1-1 Line Voltage Select Jumpers, Power Supply PC Board
1.2.2 Module Installation
Only a Phillips screwdriver is necessary for module installation. The modules for the 316 VGC contain static
sensitive devices. Be sure to follow the anti-static procedures outlined in section 1.8.1 when handling printed
circuit boards.
The modules for the 316 VGC have metal brackets which interlock to form the front and rear sections of the
chassis. Modules must be installed in their proper positions within the chassis (see Figure 1-2).

MANUAL P/N 316005 REV: B 11
Figure 1-2 Module Positions
1. - Position for computer interface module.
2. - Blank module.
3. - Position for channel A: Convectron or Thermocouple Gauge Module.
4. - Position for channels B & C: Convectron, Thermocouple, or Capacitance Manometer Module
5. - Position for Process Control Module.
1.2.3 To Install a Module
1. Turn OFF the power and remove all cabling from rear panel.
2. Remove the top cover of the controller by removing the upper front screw and the rear screw on
each side. It is not necessary to remove the lower front screw.
3. Remove the connectors holding the bus ribbon cable from all boards to the right (when viewed from
the front) of the position in which the new module is to be installed. You can also remove the display
panel and all connectors to the left.
4. Remove the blank filler module in the position in which the board is to be installed.
5. Install the new module in its proper position. Position all modules so that the chassis segments
interlock properly.
6. Re-connect the bus ribbon cable connectors taking care that the columns and rows of the
connectors are aligned.
7. Install the top cover, making sure the door hinge pin is correctly located.

12 MANUAL P/N 316005 REV: B
Figure 1-3 Mounting Configurations

MANUAL P/N 316005 REV: B 13
1.3 Mounting Configurations
Figure 1-3 illustrates the various configurations available for mounting the 316 control unit and power supply.
Note that when installing a mounting tab (8) into the left side of the control unit, the door should be
open.
The bracket (9) used to connect two control units for side by side rack mounting is not symmetrical. Install as
shown.
The rear support bracket assembly consists of a U-shaped bracket (7), and two spring clamps (6) which grip
into grooves in the side of the control unit.
Note that the 316 Controller should be mounted in a location with free air flow and ambient
temperature less than 40 oC.
1.4 Cable Connections
To avoid confusion in cable connections, a set of labels is provided with the cable. The labels are easily
attached to the gauge connector with the adhesive backing. The rear panels of the Convectron and
thermocouple modules are labeled with their respective display designations – A, B and C. See Figure 1-4 for
cable connections. Tighten the screws to secure the connectors.
Figure 1-4 Cable Connections

14 MANUAL P/N 316005 REV: B
1.4.1 Instrument Grounding
For safe operation, the Series 316 VGC controller must be connected to an AC power source which includes
a ground wire. This power ground is generally a sufficient safety precaution. A grounding stud is provided on
the rear panel of the power supply module to be uses as a separate earth ground. Ground all metal parts of
your vacuum system separately to power or earth ground. Do not ground the system via a wire to the 316
VGC chassis. Refer to Figure 1-5.
NOTE: The metal case of the gauge tube does not connect to the controller ground. Electrical connection of
the gauge tube envelope to the system does not cause a ground connection between the system and the
controller.
Figure 1-5 Correct System Grounding
1.5 Operation
1.5.1 Summary of Controls and Indicators
A description of the controls and indicators found on a basic 316 VGC is given in this section. For detailed
instructions pertaining to particular modules, refer to the chapter for that particular module.
1.5.2 Units of Measure
The unit of measure displayed is selectable via switches on the Convectron, thermocouple and capacitance
manometer modules. These units will be indicated on the front panel label when shipped from the factory.
See sections 2.2, 3.2, or 4.2 for instructions on changing units of Convectron, thermocouple or capacitance
manometer module. The pressure units label (#10 of Figure 1-6) is part of the process control channel label
and can be changed by the user if the system of units is changed. Slide the label out from the top.
The pressure is displayed in Torr/millitorr (mbar/mbar x 10-3 or pascal/pascal x 10-3) notation. That is, at
pressures below one Torr, the display shows a 10-3 exponent, indicating millitorr, while higher pressures
display no exponent, indicating Torr.

MANUAL P/N 316005 REV: B 15
Figure 1-6 Control Unit Front Panel
NOTE: Display units are set separately on the Convectron or thermocouple gauge modules.
Adjustments must be made to both gauge modules to avoid confusion. Be certain to update
the label to reflect any change of units.
1.6 Theory of Operation
More detailed explanations of the theory of operation of the Convectron, thermocouple and capacitance
manometer gauges is provided in sections 2.6, 3.6, and 4.6 respectively.
1.6.1 Microcontrollers and Bus Structure
Each module in the 316 VGC has a dedicated microcontroller with internal ROM, RAM, timing, and interrupt
management functions. This architecture provides high-performance at low cost with greater reliability and
noise immunity.
Each microcontroller is equipped with a watchdog timer, which automatically generates a reset if the
processor fails to fulfill timing "checkpoints" within its code.
Inter-processor communication is accomplished via the display bus. These lines carry BCD-format pressure
data which is used to generate the 316 VGC display. The bus is updated once per millisecond. Fifteen cycles
are used for display data. Modules that require pressure data, such as process control and computer
interface, take it directly from the display update cycles.
1.6.2 Convectron Gauge Theory
Both the Convectron gauge and the thermocouple gauge are heat loss transducers. This causes the
response of the gauges to be gas type dependent and non-linear. The Convectron gauge uses feedback
amplifier circuitry to maintain the sensor at a constant temperature thus providing greater resolution over a
wider pressure range. The thermocouple gauge heater is supplied a constant voltage, thus allowing
temperature variation over the pressure range.
1.6.3 Capacitance Manometer Theory
Within the capacitance manometer, a diaphragm is distorted by the pressure of the gas in the system under
measurement. This diaphragm forms part of a capacitor, and its deflection causes changes in capacitance.
Thus, the electrically measured capacitance is a measure of pressure. The device is very sensitive to the

16 MANUAL P/N 316005 REV: B
elastic properties of the metal of the diaphragm. For this reason, large pressure excursions, such as occur
when the system is raised to atmospheric pressure, can cause offsets to the pressure reading. The
diaphragm is also extremely sensitive to temperature effects, and although it may be held in a temperature
controlled chamber, this temperature control is never perfect, resulting in further perturbations to the devices
theoretical accuracy. Note that these perturbations are inherent in the capacitance manometer design and
are not a property of the electronic module used to operate the transducer.
Capacitance manometers are capable of exceptional accuracy, and read pressure independent of gas type,
but are also subject to zero-point drift, and must be calibrated at vacuum frequently if high accuracy is to be
obtained. Refer to the manual for your transducer for instructions.
1.7 Calibration
Calibration instructions for each gauge module are contained in the chapter for that module. Convectron
gauge calibration is in section 2.5; thermocouple calibration is in section 3.5; capacitance manometer
calibration is in section 4.5.
1.8 Basic Troubleshooting
1.8.1 Guidelines
Further troubleshooting information is located in the chapters for the specific modules.
The 316 VGC is designed for easy repair by replacement of modules.
If the user elects to perform repairs at the component level, repairs properly made with equivalent electronic
parts and rosin core solder do not represent a violation of the warranty.
Some minor difficulties are user-correctable, and the built-in diagnostic aids described here may be helpful.
Each module has status LEDs which will aid in localizing failures. These are described in the troubleshooting
section of the chapters for each module. Shown in Figure1-7 are those LEDs found on the 316 VGC power
supply board. This is the PC board on the right side (when viewed from the front) of the 316 control unit.
Since the 316 VGC contains static-sensitive electronic parts, the following precautions must be followed
when troubleshooting:
xUse a grounded, conductive work surface.
xUse conductive envelopes to store or ship MOS devices or printed circuit boards.
xDo not operate the 316 VGC with MOS devices removed from the unit.
xDo not handle MOS devices more than absolutely necessary, and only when wearing a ground
strap.
xDo not use an ohmmeter for troubleshooting. Rely on voltage measurements.
xUse grounded-type soldering iron only.
Danger – High Voltage
High Voltages are present within the Controller, capable of causing injury or death. Do not touch
cable connections or circuitry of the power supply module when power is applied.

MANUAL P/N 316005 REV: B 17
1.8.2 Troubleshooting Guide
Symptom Possible cause
Unit won't power-up, no response
to power switch
Power fuse (17) blown
Wrong line voltage selection, see Figure 1-1
Power fuse (17) blows repeatedly Wrong fuse rating
Wrong line voltage selection, see Figure 1-1
LED (12) out on control board +15 volt supply faulty (power to capacitance manometer)
LED (13) out on control board +12 volt supply faulty (power to analog circuitry and RS232)
LED (14) out on control board +5 volt supply faulty (power to logic and display)
LED (15) out on control board -12 volt power faulty (power to analog circuitry and RS232)
LED (16) out on control board -15 volt supply faulty (power to capacitance manometer)
Figure 1-7 Power Supply Board, Top View (Controller Cover Removed)
1.9 Repair Ordering
Telephone Brooks Automation, Inc. to obtain a Return Authorization (RA) prior to returning your unit for
repairs.
A repair order must accompany returned equipment even when the equipment is being returned for a
warranty repair at no charge. Be sure to include a detailed description of the problem in addition to your
name, telephone number and address where we can contact you. Equipment returned for repair must be
carefully and strongly packaged to withstand shipping abuse. Components or printed circuit boards to be
returned separately must be protected against static damage by wrapping them in static proof containers
prior to packaging them for shipment. Address replacement/repair orders and correspondence to the
address given on the title page of this manual or as directed by the Customer Service Representative.
A Service Form is provided at the end of this chapter. Photocopy the form, fill in the requested information,
including the RA number you were given by a Brooks Automation/Granville-Phillips Customer Support
Representative, and include the form with your with your equipment when shipped to the repair center.

18 MANUAL P/N 316005 REV: B
If a replacement module is desired, it is important that you give our Service Department the complete catalog
number of the module. This will help ensure that you receive the correct replacement.
NOTE: Under no circumstances will Brooks Automation, Inc. be liable for shipping damages
due to rough handling, improper packaging, or other circumstances beyond its control. All
return shipments must be freight prepaid.
1.10 Specifications (316 Vacuum Gauge Controller)
See the chapters for each module for additional specifications relating to that module.
Physical dimensions and weight
Width 241 mm (9.5 in.) with 1/2 rack mounting tabs
Height 89 mm (3.5 in.)
Depth 356 mm (14 in.) includes 76 mm (3 in.) for connectors and cables
Weight 3 kg (6.6 lb.)
Electrical requirements
Voltage 90-110 Vac or 105-125 Vac or 220 – 240 Vac
Frequency 50 or 60 Hz
Power 100 watts max.
Fuse Ratings 0.5 A (90-125 Vac), 3AG normal blow
0.25 A (220-240 Vac), 3AG normal blow
Operating environment
Temperature 0 oC to 40 oC
IP Rating IP32
Display information
Display Resolution Torr/mTorr notation, 3 significant digits
(1 digit in lowest decade; 2 digits in next lowest decade)
Display Update Time 0.5 sec typical, 3.0 sec selectable
Units of measure Torr, millibar, or pascal selectable

MANUAL P/N 316005 REV: B 19
Service Form
Photocopy this form, fill it out, and return it with your equipment.
RA No. (Contact Granville-Phillips Customer Service at 1-303-652-4400
or 1-800-776-6543 in the USA; FAX: [phone], or email: co[email protected])
Model No. Serial No. Date
Name: Phone No.
Company:
Address:
City: State: Zip:
Please help Granville-Phillips continue to provide the best possible service by furnishing information that will
help us determine the cause of the problem, as well as protect our analysis and calibration equipment from
contamination.
Problem description:
Application description:
Has this product been used with high vapor pressure or hazardous materials? Yes No
If Yes, please list the types of gas, chemicals (common names, specific chemical,) biological materials, or
other potentially contaminating or harmful materials exposed to the product during its use.
NOTE: PRODUCTS EXPOSED TO RADIOACTIVE MATERIAL CANNOT BE ACCEPTED BY
GRANVILLE-PHILLIPS UNDER ANY CIRCUMSTANCES.
Corporate Officer Signature:
Printed Name: Phone No.

20 MANUAL P/N 316005 REV: B
Chapter 2 - The Convectron Gauge Module
2.1 Safety Notices
Be sure to read through this instruction manual before installing, using, or servicing this equipment.
If you have any questions or doubts about how to use this equipment safely, contact the Brooks
Automation, Inc, Customer Service Department listed at the front of this manual.
2.1.1 Explosive Gases
Do not use the gauge tube when there is danger of explosion from ignition of combustible gas mixtures. The
sensing element normally operates at only 125 oC but it is possible that momentary transients or controller
malfunction can raise the sensor above the ignition temperature of combustible mixtures which might then
explode causing damage to equipment and injuring personnel.
2.1.2 Limitation on Use of Compression Mounts
Do not use a compression mount (quick connect) for attaching the gauge tube to the system in applications
resulting in positive pressures in the gauge tube. Positive pressures might blow the tube out of a
compression fitting and damage equipment and injure personnel. The Convectron gauge should not be used
above 1000 Torr (1333 mbar or 1.33 x 105Pa).
2.1.3 Gauge Tube Mounting Position
If the gauge tube will be used to measure pressures greater than 1 Torr or 1 mbar, the tube must be
mounted with its axis horizontal. Although the gauge tube will read correctly below 1 Torr when mounted in
any position, erroneous readings will result at pressures above 1 Torr if the tube axis is not horizontal.
Erroneous readings can result in over or under-pressure conditions which can damage equipment and injure
personnel.
2.1.4 Overpressure
Convectron gauges should not be used above 1000 Torr true pressure. Series 316 Controllers are furnished
calibrated for N2. They also measure the pressure of air correctly within the accuracy of the instrument. Do
not attempt to use a Convectron gauge calibrated for N2to measure or control the pressure of other gases
such as argon or CO2, unless accurate conversion data for N2to the other gas is properly used. If accurate
conversion data is not used or improperly used, a potential overpressure explosion hazard can be created
under certain conditions. For example, at 760 Torr of argon gas pressure, the indicated pressure on a
Convectron gauge calibrated for N2is 24 Torr. At an indicated pressure of 50 Torr, the true pressure of argon
is considerably above atmospheric pressure. Thus, if the indicated pressure is not accurately converted to
true pressure, it is possible to overpressure your system. Overpressure can cause glassware such as
ionization gauges to shatter dangerously, and if high enough can cause metal parts to rupture thus damaging
the system and possibly injuring personnel. See Section 2.4 for proper use of conversion data.
A pressure relief valve should be installed in the system should the possibility of exceeding 1000 Torr exist.
2.1.5 High Indicated Pressure
For some gases, be aware the indicated pressure will be higher than the true pressure. For example, at a
true pressure of 9 Torr for helium the indicated pressure on a Convectron gauge calibrated for N2is 760 Torr.
The safe way to operate the gauge is to properly use accurate conversion data. See Section 2.4 for proper
use of conversion data.
2.1.6 Chemicals
Cleaning solvents, such as trichloroethylene, perchloroethylene, toluene and acetone, produce fumes that
are toxic and/or flammable. Use only in areas well ventilated to the outdoors and away from electronic
equipment, open flames, or other potential ignition sources.

MANUAL P/N 316005 REV: B 21
2.1.7 Sensor Failure
If the gauge tube becomes disconnected from the controller or if the sensor wire in the gauge tube fails, the
controller will indicate 9.99E+9. If the gauge is unplugged from a powered controller, there might be an
instantaneous (0 to 0.2 seconds) drop in the pressure indication and the process control relays could activate
for this brief time, depending on the order in which the gauge tube pins break contact.
2.1.8 Gauge Tube Contamination
The calibration of the gauge will be seriously affected by any gas which will attack the gold plated sensor, and
could result in over-pressurizing the system. Two primary gases in this category are mercury vapor and
fluorine.
2.2 Convectron Module, Introduction
The Convectron Gauge (CG) Module provides pressure measurement from 1.0 x 10-3 Torr (1.0 x 10-3 mbar
or 1.0 x 10-1 Pa) to 999 Torr, and one meaningful digit pressure indication down to 1 x 10-4 Torr, air
equivalent. The basic 316 VGC displays pressure from one Convectron gauge in display "A" via the single
channel, "A", Convectron module. Two additional pressures from Convectron gauges can be displayed in
displays "B" and "C" via the dual channel "B" and "C" module. These gauges, modules, and displays are
designated "CGA", "CGB", and "CGC" in this manual.
Analog output (logarithmic in pressure, 1 volt per decade) is also provided through the phone jack(s) on the
rear panel. When used with the Process Control Module, CGA controls setpoints 1 and 2, CGB controls
setpoints 3 and 4, and CGC controls setpoints 5 and 6.
2.2.1 Units of Pressure Measurement
Your Series 316 Controller was shipped from the factory preset to display the unit of measure, Torr,
millibar, or pascal, that you requested. If you want to change the display units, proceed as follows:
1. Remove the power cord from the control unit.
2. Remove the top cover and locate the Convectron Module. See Figure 2-1
3. Locate the millibar (#1), and the pascal (#2) units switches.
4. Leave both switches open for Torr units; close the appropriate switch for either millibar or pascal
units.
5. Modify the units of measure of the Convectron "B and C" module similarly to be consistent with the
Convectron "A" module.
6. Slip the label card out of the top of the front panel and apply the appropriate pressure units label.
Note: The Slow Update Switch is a display update rate switch. "ON" enables pressure averaging,
and the display will update approximately every 3 seconds. When "OFF", the update period is
approximately 0.5 sec.