Related Manuals for Instrutech VGC-301
Summary of Contents for Instrutech VGC-301
- Page 1 InstruTech, Inc. VGC-301 Vacuum Gauge Controller User’s Manual Revision: 1.05 March 20, 2009 1475 S. Fordham St. Longmont, CO 80503 Phone 303-651-0551 Fax 303-678-1754 E-mail info@instrutechinc.com www.instrutechinc.com...
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Page 2: Table Of Contents
Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Table of Contents page Introduction / General Information Description Specifications Options & Accessories Safety General Service and Operation Electrical Overpressure Gases other than N Flammable/Explosive Gases Installation Mounting Electrical Connections Setup & Operation... -
Page 3: Introduction / General Information
AC and 2-pin pluggable terminal block DC RF/EMI protection CE compliant Options & Accessories ® Gauge Cable - Connects VGC-301 to InstruTech CVG-101 Worker Bee or Helix/GP 275 Convectron gauge tube 10 ft (3m) CB 421-1- 10F 20 ft (6m) -
Page 4: Safety
InstruTech VGC-301 Convection Vacuum Gauge Controller Safety Instrutech has designed and tested this product to provide safe and reliable service, provided it is installed and operated within the strict safety guidelines provided in this manual. Please read and follow all warnings and instructions. -
Page 5: Gases Other Than
Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Safety (continued) Gases other than Nitrogen: InstruTech gauges are calibrated for N . Do not attempt to use with other gases such as argon or CO unless accurate conversion data for N to the other gas is properly used. -
Page 6: Installation
This manual describes installation of the VGC-301 Controller and connection to the vacuum gauge. For installation of the vacuum gauge, refer to the instruction manual for your particular gauge. Installation - Controller Mounting The VGC-301 was designed for use on a bench top, or mounted in an instrument control panel. panel 50mm... -
Page 7: Electrical Connections
Two-pin pluggable terminal strip (Mating connector: Phoenix p/n 1803578 or InstruTech p/n 000327). pin number pin description +12 to +30 V ground Note: The VGC-301 will operate from either AC or DC power. It is not necessary to supply both. InstruTech, Inc page 7... - Page 8 2 common relay 2 NC relay 2 NO Gauge Connector VGC-301 - Nine-pin D female. (Mating connector: InstruTech p/n 000XXX + 000YYY) CVG Gauge tube - Custom connector (Mating connector: InstruTech p/n 000ZZZ) VGC-301 pin number connects to CVG gauge pin number...
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Page 9: Setup & Operation
Setup and Operation User Interface Basics: The menus within the VGC-301 user interface have been designed for easy operation and a natural progression of setup parameters. The complete map of the user interface screens is shown in appendix A. The following sections give a brief explanation of the features for added clarity. -
Page 10: Calibration
This screen shows the Instrutech phone number for questions and the unit software version. Calibration: All InstruTech gauges are calibrated prior to shipment using Nitrogen. However, you can calibrate the VGC-301 against your own standards, using the zero and span settings, as described above. Zero and span affect the displayed pressure values and the output signals. -
Page 11: Interface
Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Interface RS485/RS232 Command Protocol Summary. (All values must be set in Torr) ® Note: This protocol was designed to be 100% compatible with the Helix / Granville-Phillips Mini-Convectron COMMAND BRIEF DESCRIPTION COMMAND SYNTAX... -
Page 12: Service
8. A valid address must be used even in RS232 commands. Factory default is 1. Service Maintenance Under normal circumstances, there is no routine maintenance required for your VGC-301 Controller. Good manufacturing practice suggests that all measuring instruments should be periodically calibrated against known calibration standards. -
Page 13: Factory Default Reset
Factory Default Reset When all else fails, the VGC-301 can be returned to the original factory settings by pressing the upper left and upper right softkeys simultaneously. The user will then be prompted “Set Factory Defaults?”. Choose Yes or No. -
Page 14: User Interface Map
Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller InstruTech, Inc page 14... - Page 15 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller User Interface Map - page 2 InstruTech, Inc page 15...
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Page 16: Using Thermal Vacuum Gauges With Different Gases
Log-Linear Analog Output Log-Linear Analog Output Log-Linear Output Many InstruTech modules and controllers also provide a log- Output - Volts Output - Volts linear output signal, as an alternative to the non-linear signal described above. This output, shown at right, is a 1 Volt per decade signal that may be easier to use for data logging or control. - Page 17 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Linear Output Some InstruTech controllers & modules offer a user- Output - Volts Output - Volts programmable linear analog output. In this case, the user chooses the two end points, and the signal is a linear output...
- Page 18 Other considerations when using gases other than N Flammable or explosive gases: InstruTech CV gauges and modules are not intrinsically safe or explosion proof, and are not intended for the measurement, or use in the presence, of flammable or explosive gases or vapors.
- Page 19 The X-Axis is the pressure reading indicated by the convection gauge under test. ® The chart shows readings for an InstruTech CVG as well as for a GP Convectron gauge, to illustrate that the response of the gauges to these different gases is virtually indistinguishable. (Caution: Do not assume this data applies to other convection gauges, which may or may not be the same.)
- Page 20 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Table 1 - Non-Linear Analog Output Voltage vs Pressure, for Selected Gases True Total Freon12 Freon22 Pressure mTorr 0.3751 0.3750 0.3750 0.3750 0.3750 0.3750 0.3750 0.3750 0.3750 0.3750 0.3750 mTorr 0.3759 0.3757 0.3755...
- Page 21 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Table 2 - Log-Linear Analog Output Voltage vs Pressure, for Selected Gases True Pressure Freon12 Freon22 (Torr) 0.0001 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 0.0002 1.301 1.301 1.301...
- Page 22 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Log-Linear Analog Output Voltage vs Pressure 0.0001 0.001 0.01 1000 Pressure (Torr) This is a plot of the formulas and data for the log-linear output signal, from the previous page. InstruTech, Inc...
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Page 23: Vacuum Gauge Contamination & Cleaning
Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller Table 3 - Displayed Pressure Readings vs Pressure, for Selected Gases True Total Freon12 Freon22 Pressure mTorr mTorr mTorr mTorr mTorr mTorr mTorr mTorr 10.0 11.0 14.7 13.5 12.1 15.3 mTorr 20.0 13.1... - Page 24 Instruction Manual InstruTech VGC-301 Convection Vacuum Gauge Controller The most common cause of all vacuum gauge failures is contamination of the sensor. Noisy or erratic readings, the inability to set zero or atmosphere, and total gauge failure, are all possible indications of gauge contamination.
- Page 25 More commonly, particles in the process chamber are swept into the gauge during the vent cycle. InstruTech gauges have a screen built into the gauge port, to help keep the largest particles out of the gauge. In very dirty applications, or where particles are small enough to get through the screen, an additional filter installed on the inlet may help prolong gauge life further.
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Page 26: Warranty
(examination of which shall disclose to SELLER's satisfaction that it is defective) returned, to SELLER's plant, properly identified within five (5) years (unless otherwise noted) after the date of shipment from InstruTech Plant. BUYER must obtain the approval of SELLER and a return authorization number prior to shipment.