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Related Manuals for Instrutech VGC301
Summary of Contents for Instrutech VGC301
- Page 1 InstruTech®, Inc. VGC301 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 000363-110...
- Page 2 XXXXX-11 (last two digits of 11). See Info screen menu described in section 4.2 of this manual to determine the firmware version of your VGC301. For previous versions of VGC301 User Manuals manufactured with firmware XXXXX-10 or lower (last two digits of 10 or lower), please go to http://www.instrutechinc.com/downloads-archived-user-manuals/...
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Page 3: Table Of Contents
Instruction Manual VGC301 Controller Table of Contents Introduction / General Information ......................3 Description ............................3 Specifications ..........................3 Dimensions ............................4 Part Numbers ..........................4 Important Safety Information .......................6 Safety Precautions - General ......................6 Safety Precautions - Service and operation ..................7 Electrical Conditions ........................7 2.3.1... - Page 4 Instruction Manual VGC301 Controller Analog Output .............................19 Log 1-8; Log-Linear Analog Output Equation & Table - Torr ............22 Log 1-8; Log-Linear Analog Output Equation & Table - mbar .............24 Log 0-7; Log-Linear Analog Output Equation & Table - Torr ............26 Log 0-7;...
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Page 5: Introduction / General Information
275 Convectron®. The 1/8-DIN housing can be used as a bench top, or mounted in a cutout in an instrument panel. The VGC301 is powered by user supplied 12 to 30 Vdc, 2 W, or by the InstruTech PS301 power supply. -
Page 6: Dimensions
Instruction Manual VGC301 Controller Dimensions Part Numbers VGC301 Controller (Power On/Off buttons enabled. Must Push On/Off buttons to turn controller on/off). VGC301A VGC301 Controller (Power On/Off buttons disabled. Controller turns on automatically when power is applied). VGC301B Optional PS301 Power Supply for VGC301 controller... - Page 7 25 ft. (8 m): CB421-1-25F Worker Bee™ vacuum gauge 50 ft. (15 m): CB421-1-50F sensor to the VGC301 controller over 50 ft. or custom lengths: Consult Factory InstruTech CVG101 Worker Bee Combination 1/8 in. NPT male - 1/2 in. tube...
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Page 8: Important Safety Information
VGC301 Controller 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 9: Safety Precautions - Service And Operation
Ensure that the vacuum port on which the CVG101 vacuum gauge tube is mounted is electrically grounded. Use an appropriate power source of 12 to 30 Vdc, 2 W or use InstruTech series PS301 optional power supplies. Turn off power to the unit before attempting to service the controller. -
Page 10: 2.3.2 Electrical Interface And Control
) 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
Installation 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
Input DC Power Input The VGC301 accepts DC power from 12 to 30 Vdc, 2 W. If the user prefers to use AC power, InstruTech offers the series PS301 optional power supplies with various AC Plugs. 2-pin pluggable terminal strip (Mating connector: Phoenix p/n 1803578 or InstruTech p/n 000729). - Page 13 2 NO Gauge cable assembly P/N CB421-1-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® 275 Convectron® vacuum gauge sensor. The cable pin to pin connection is shown below.
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Page 14: Setup And Operation
This should be the first parameter that is set. This will be the units-of-measure (Torr, mbar, Pa) that are used for all other settings. If your VGC301 has been previously configured and relay setpoints and linear analog output pressure settings have been programmed, changing units-of-measure will return the relays setpoints and the linear analog output pressure settings to factory default setting values in Torr. - Page 15 2. Go to the SET ATM screen. When the desired pressure is stable, adjust the displayed pressure reading on the VGC301 to the known value using the INCR (increase) or DECR (decrease) keys. Press the SAVE/EXIT key to save the new atmospheric (span) pressure value.
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Page 16: Return To Factory Default Settings
Instruction Manual VGC301 Controller BAUD [Factory default = 19,200] This sets the baud rate for the RS485 and the RS232 serial communications. The baud rate can be set to various values through the serial interface or via the front panel soft-keys. The parity can only be changed through the serial interface command set. -
Page 17: Using The Gauge With Different Gases
Under normal conditions the voltages and currents in InstruTech convection gauges are too low to cause ignition of flammable gases. However, under certain failure conditions, sufficient energy could be generated to cause flammable vapors or gases to ignite or explode. - Page 18 The X-axis is the pressure reading indicated by the convection gauge under test. This chart shows readings for an InstruTech convection gauge (CVG) and Granville-Phillips® Convectron® gauge to illustrate that the difference in the response for both of these types of gauges is virtually indistinguishable.
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Page 19: Display
Instruction Manual VGC301 Controller Display Display - Torr / mTorr The table below shows the displayed readings at various pressures for selected gases when engineering units selected is in Torr/mTorr. Displayed Pressure Readings vs. True Pressure for selected gases Pressures shown in bold italic font in the shaded areas are in mTorr. -
Page 20: Display - Mbar
Instruction Manual VGC301 Controller Display - mbar The table below shows the displayed readings at various pressures for selected gases when engineering units selected is in mbar. Displayed Pressure Readings vs. True Pressure for selected gases - Engineering units in mbar... -
Page 21: Analog Output
The analog output information described in this User Manuals applies to VGC301 manufactured with the current firmware XXXXX-11 and higher (last two digits of 11 or higher). See INFO screen of the VGC301 display menu to determine the firmware version you are using. When compared to the previous versions of the VGC301 firmware, the current version of the firmware provides additional analog output scaling options as listed in the table below. - Page 22 Phillips Mini-Convectron® modules original S-curve of 0.375 to 5.659 Vdc corresponding to 0 to 1000 Torr. If you also have a previous version(s) of the VGC301 product manufactured with firmware XXXXX-10 or lower (last 2 digits of 10 or lower, see firmware number in the INFO screen of the display menu), the “NONLIN 6V”...
- Page 23 LINEAR; 0-10 Vdc Linear Analog Output The VGC301 also provides a linear 0-10 Vdc analog output. The linear output voltage can be any value between 0.01 V and 10 V corresponding to displayed pressure between 1 mTorr and 1000 Torr. However, the useful range of the linear analog output is three decades.
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Page 24: Log 1-8; Log-Linear Analog Output Equation & Table - Torr
Instruction Manual VGC301 Controller Log 1-8; Log-Linear Analog Output Equation & Table - Torr Log-Linear 1 to 8 V 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... - Page 25 Instruction Manual VGC301 Controller LOG 1-8; Log-Linear Analog Output Voltage vs Pressure (Torr) Chart of the calculated pressures using the formulas and data for the log-linear output signal for nitrogen from the previous page. InstruTech, Inc. Page 23...
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Page 26: Log 1-8; Log-Linear Analog Output Equation & Table - Mbar
Instruction Manual VGC301 Controller Log 1-8; Log-Linear Analog Output Equation & Table - mbar Log-Linear 1 to 8 V 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... - Page 27 Instruction Manual VGC301 Controller LOG 1-8; Log-Linear Analog Output Voltage vs Pressure (mbar) Chart of the calculated pressures using the formulas and data for the log-linear output signal for nitrogen from the previous page. InstruTech, Inc. Page 25...
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Page 28: Log 0-7; Log-Linear Analog Output Equation & Table - Torr
Instruction Manual VGC301 Controller Log 0-7; Log-Linear Analog Output Equation & Table - Torr Log-Linear 0 to 7 V analog output for selected gases - Engineering units in Torr True Pressure (Torr) Freon12 Freon22 0.0001 0.000 0.000 0.000 0.000 0.000 0.000... - Page 29 Instruction Manual VGC301 Controller LOG 0-7; Log-Linear Analog Output Voltage vs Pressure (Torr) Chart 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: Log 0-7; Log-Linear Analog Output Equation & Table - Mbar
Instruction Manual VGC301 Controller Log 0-7; Log-Linear Analog Output Equation & Table - mbar Log-Linear 0 to 7 V analog output for selected gases - Engineering units in mbar True Pressure Freon12 Freon22 (mBar) 0.0001 0.000 0.000 0.000 0.000 0.000 0.000... - Page 31 Instruction Manual VGC301 Controller LOG 0-7; Log-Linear Analog Output Voltage vs Pressure (mbar) Chart of the calculated pressures using the formulas and data for the log-linear output signal for nitrogen from the previous page. InstruTech, Inc. Page 29...
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Page 32: Nonlin 6V; Non-Linear Analog Output Equations
Instruction Manual VGC301 Controller NONLIN 6V; Non-Linear Analog Output Equations You may calculate the pressure represented by the NONLIN 6V, 0.375 to 5.659 V non-linear analog output voltage for the “S-curve” using a multi-segment, n order polynomial function calculation. The coefficients for the n... -
Page 33: Nonlin 6V; Non-Linear Analog Output Table - Torr
Instruction Manual VGC301 Controller NONLIN 6V; Non-Linear Analog Output Table - Torr Non-Linear 0.375 to 5.659 V 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... -
Page 34: Nonlin 6V; Non-Linear Analog Output Table - Mbar
Instruction Manual VGC301 Controller NONLIN 6V; Non-Linear Analog Output Table - mbar Non-Linear 0.375 to 5.659 V 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... -
Page 35: Nonlin 9V; Non-Linear Analog Output Equations & Table
Instruction Manual VGC301 Controller NONLIN 9V; Non-Linear Analog Output Equations & Table You may calculate the pressure represented by the NONLIN 9V, 0 to 9 V non-linear analog output voltage for the “S-curve” using a multi-segment, n order polynomial function calculation. Use the coefficients listed in the table below to calculate... - Page 36 Instruction Manual VGC301 Controller Coefficients for voltage segment range of 7.6465 to 7.9102 volts = +1.811462E+06 = -1.511014E+03 = +4.196562E-01 = -3.880208E-05 Coefficients for voltage segment range of 7.9102 to 9 volts = -2.417225E+05 = +1.919958E+02 = -5.106048E-02 = +4.554342E-06 Example: Measured analog output voltage is: V = 5.6243 V.
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Page 37: Linear (0-10 Vdc)
VGC301 Controller LINEAR The VGC301 analog output may be setup to provide a 0-10 Vdc output signal that has a direct linear relationship to the displayed pressure. When preparing to setup and process the linear analog output signal, first define the following parameters that you will program into the VGC301: ... -
Page 38: Rs485 / Rs232 Serial Communications
RS485 / RS232 serial communications 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 39: Rs485 / Rs232 Command Protocol Summary
Instruction Manual VGC301 Controller 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 40: Service
(N ) / air. Maintenance In general, maintenance is not required for your InstruTech sensor and controller. Periodic performance checks may be done by comparing the sensor to a known reference standard. Troubleshooting... -
Page 41: 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 42 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 000363-110...