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Related Manuals for Instrutech VGC301A
Summary of Contents for Instrutech VGC301A
- Page 1 ™ InstruTech , Inc. VGC301A Convection Vacuum Gauge Controller User Manual InstruTech, Inc. 1475 S. Fordham St. Longmont, CO 80503 Phone: +1-303-651-0551 Fax: +1-303-678-1754 E-mail info@instrutechinc.com www.instrutechinc.com p/n 000363-106...
- Page 2 Copyright © 2011 by InstruTech, Inc. All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or by any information storage or retrieval system, except as may be expressly permitted in writing by InstruTech, Inc.
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Page 3: Table Of Contents
VGC301 Part number ........................4 Options & Accessories ........................4 Important Safety Information ....................... 5 Safety Precautions – General ......................5 Safety Precautions – VGC301A service and operation ..............6 Electrical Conditions ........................6 2.3.1 Proper Equipment Grounding ....................6 Overpressure .......................... - Page 4 Instruction Manual VGC301A Controller Display ..............................19 Display - Torr / mTorr ......................... 19 Display - mbar ..........................20 Analog Output ............................ 21 Non-Linear Analog Output - Torr / mTorr .................. 22 Non-Linear Analog Output - mbar ..................... 23 Log-Linear Analog Output - Torr ....................24 Log-Linear Analog Output - mbar ....................
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Page 5: Introduction / General Information
1.1 Description The VGC301 vacuum gauge controller is a convenient and inexpensive power supply and readout instrument for ® the InstruTech CVG101 Worker Bee™ convection-enhanced Pirani vacuum gauge or a Granville-Phillips ® Convectron gauge. The 1/8-DIN housing can be used as a bench top, or mounted in a cutout in an instrument panel. -
Page 6: Dimensions
VGC301 Part number Description Part Number VGC301A Panel / Bench mount convection vacuum gauge controller Options & Accessories Gauge Cable - Connects VGC301 controller to InstruTech CVG101 Worker Bee or Brooks Automation, Inc. ® ® / Granville-Phillips 275 Convectron gauge. -
Page 7: Important Safety Information
VGC301A Controller 2 Important Safety Information 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 8: Safety Precautions - Vgc301A Service And Operation
Do not use if the equipment grounding or electrical insulation has been compromised. Do not use if the unit has been dropped or the enclosure has been damaged. Contact InstruTech for return authorization and instructions for returning the product to InstruTech for evaluation. -
Page 9: Overpressure
The CVG101 vacuum gauge tube connected to the VGC301A controller is not intended for use at pressures above 20 psia (1000 torr); DO NOT exceed 35 psig (< 2 ½ bars) pressure inside the sensor. If your chamber goes to higher pressures, you should install an isolation valve or pressure relief device to protect the gauge tube from overpressure conditions. -
Page 10: Gases Other Than Nitrogen / Air
) or air without referring to correction factor data tables. InstruTech gauges and modules are calibrated for direct readout of nitrogen or air. Do not attempt to use with other gases such as argon (Ar) or carbon dioxide (CO ) unless accurate conversion data for N to other gas is properly used. -
Page 11: Installation
Instruction Manual VGC301A Controller 3 Installation 3.1 Mechanical Installation The VGC301 is designed for use on a bench top, or it may be mounted in an instrument control panel. To mount the VGC301 in a panel: 1. Make a cutout in your instrument control panel as shown in the drawing above. Be sure to allow clearance... -
Page 12: Electrical Installation
A good recommended practice is to remove power from any cable prior to connecting or disconnecting it. ® The InstruTech VGC301 may replace similar controllers from other manufacturers, such as the Granville-Phillips 375 controller. Many of these other controllers employ the same 9-pin and 15-pin D connectors, but they do not all use the same signal / pinout configurations. - Page 13 2 NC relay 2 NO Gauge cable assembly P/N CB 421-1- XXXF is a custom cable assembly provided in different lengths from InstruTech for connecting the ® VGC301 controller to InstruTech CVG101 Worker Bee or Brooks Automation, Inc. / Granville-Phillips ®...
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Page 14: Setup And Operation
Instruction Manual VGC301A Controller 4 Setup and Operation 4.1 User Interface Basics The user interface is designed for easy operation and a Programming soft-keys natural progression of setup parameters. A complete user interface map is shown in section 4.4. This section gives a brief explanation of operation for added clarity. - Page 15 Instruction Manual VGC301A Controller SET ATM 1. To set the atmospheric pressure reading (also known as the “span” adjustment), flow nitrogen gas into your closed vacuum chamber to allow the pressure to rise to a known value above 400 Torr.
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Page 16: Return To Factory Default Settings
1 mTorr and 1000 Torr. [Factory default is 10 mV to 10 Vdc corresponding to 1 mTorr to 1 Torr] INFO This screen shows the InstruTech telephone number for questions and the unit firmware version. 4.3 Return to Factory Default Settings You can reset all values to the original factory default settings by simultaneously pressing the upper left and upper right soft-keys. -
Page 17: Vgc301 User Interface Map
Instruction Manual VGC301A Controller 4.4 VGC301 User Interface Map InstruTech, Inc. Page 15... - Page 18 Instruction Manual VGC301A Controller VGC301 User Interface Map (continued) InstruTech, Inc. Page 16...
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Page 19: Using The Gauge With Different Gases
/ air Flammable or explosive gases WARNING! InstruTech convection gauges are not intrinsically safe or explosion proof and are not intended for use in the presence of flammable or explosive gases or vapors. Under normal conditions the voltages and currents in InstruTech convection gauges are too low to cause ignition of flammable gases. - Page 20 The Y- Axis is actual pressure as measured by a capacitance manometer, a diaphragm gauge that measures true total pressure independent of gas composition. The X-Axis is the pressure reading indicated by the convection gauge under test. The chart above shows readings for an InstruTech convection gauge (CVG) and Granville- ®...
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Page 21: Display
Instruction Manual VGC301A Controller 6 Display 6.1 Display - Torr / mTorr Table below shows the displayed readings at various pressures for selected gases when engineering units selected is in Torr/mTorr. Displayed Pressure Readings vs. Pressure for selected gases- Engineering units in Torr / mTorr Pressures shown in bold italic font in the shaded areas are in mTorr. -
Page 22: Display - Mbar
Instruction Manual VGC301A Controller 6.2 Display - mbar Table below shows the displayed readings at various pressures for selected gases when engineering units selected is in mbar. Displayed Pressure Readings vs. Pressure for selected gases - Engineering units in mbar... -
Page 23: Analog Output
Log-Linear Output Log-Linear Analog Output Log-Linear Analog Output Many InstruTech modules and controllers also provide a log- linear output signal, as an alternative to the non-linear signal Output - Volts Output - Volts described above. -
Page 24: Non-Linear Analog Output - Torr / Mtorr
Instruction Manual VGC301A Controller 7.1 Non-Linear Analog Output - Torr / mTorr Non-Linear analog output for selected gases - Engineering units in Torr/mTorr 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... -
Page 25: Non-Linear Analog Output - Mbar
Instruction Manual VGC301A Controller 7.2 Non-Linear Analog Output - mbar Non-Linear analog output for selected gases - Engineering units in mbar True Pressure Freon12 Freon22 0 mbar 0.3751 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 .0001 mbar 0.3759... -
Page 26: Log-Linear Analog Output - Torr
Instruction Manual VGC301A Controller 7.3 Log-Linear Analog Output - Torr Log-Linear analog output for selected gases - Engineering units in Torr 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... - Page 27 Instruction Manual VGC301A Controller Log-Linear Analog Output Voltage vs Pressure 0.0001 0.001 0.01 1000 Pressure (Torr) is is a plot of the calculated pressures using the formulas and data for the log-linear output signal for nitrogen from the previous page.
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Page 28: Log-Linear Analog Output - Mbar
Instruction Manual VGC301A Controller 7.4 Log-Linear Analog Output - mbar Log-Linear analog output for selected gases - Engineering units in mbar True Pressure (mbar) Freon12 Freon22 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... - Page 29 Instruction Manual VGC301A Controller This is a plot of the calculated pressures using the formulas and data for the log-linear output signal for nitrogen from the previous page. InstruTech, Inc. Page 27...
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Page 30: Rs485/Rs232 Serial Communications
Instruction Manual VGC301A Controller 8 RS485 / RS232 serial communications 8.1 Device Specific Serial Communication Info The standard VGC301 model provides RS232/RS485 serial communications. The following information and the RS485/RS232 command protocol summary listed on the next page should be used to set serial communications with the device. -
Page 31: Rs485/Rs232 Command Protocol Summary
Instruction Manual VGC301A Controller 8.2 RS485 / RS232 Command Protocol Summary COMMAND BRIEF DESCRIPTION COMMAND SYNTAX RESPONSE READ Read the current pressure in Torr #xxRD<CR> *xx_y.yyEzyy<CR> (eg: #01RD<CR>) (eg: *01_7.60E+02<CR>) SET ADDR Set the communications (RS485) #xxSAxx<CR> *xx_PROGM_OK<CR> OFFSET address offset (upper nibble) (eg: #01SA20<CR>) -
Page 32: Service
(N ) / air. 9.2 Maintenance In general, maintenance is not required for your InstruTech gauge and controller. Periodic performance checks may be done by comparing the gauge to a known reference standard. 9.3 Troubleshooting... -
Page 33: Factory Service And Support
(examination of which shall disclose to SELLER's satisfaction that it is defective) returned, to SELLER's plant, properly identified within five 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. - Page 34 ™ InstruTech , Inc. 1475 S. Fordham St. Longmont, CO 80503 Phone +1-303-651-0551 Fax +1-303-678-1754 E-mail info@instrutechinc.com www.instrutechinc.com p/n 000363-106...