Model 450 Manual
Contents
1. 4 0 INSTALLATION Position the unit as desired and make the following connections Connect the power supply to AC power 115 to 230 volts 50 60 400 Hz Connect the power jack to the rear of the unit Connect the Right Hose connection as seen from the rear of the unit to the vacuum pump Connect the Left Hose connection as seen from the rear of the unit to the system Rack Installation The unit may be mounted on racks using the tray fittings available from VWR Scientific and other vendors Right Hose i Connection Connection 5 0 After OPERATION installation the instrument is ready for immediate operation The unit consists of the instrument housing with interface connector It can be powered with the included external 100 240 VAC power adaptor To operate Plumb the unit in between vacuum pump and vessel Attach source of bleed air if nothing is attached atmospheric air will be used Place both front panel toggle switches in the center position Using the knob set the desired pressure Move the right switch to the up regulate position Model 450 Vacuum Regulator Vacuum Level i microcontroller Bleed valve aud Proportional PC running optional VDS software Vacuum Pump Vacuum Vessel The unit will now read 760 Torr 708 Set 48 pwm loc or RMT The first line shows the current pressure and the set point The second line shows the percent the valve is open followed2. against a NIST traceable standard with data SS Makes vacuum path completely composed of stainless steel to reduce effects of a corrosive environment Differential Gives the ability to control a differential vacuum level from 3 0 to 3 0 PSI Please consult the product guide and website for the latest available 10 0 SPECIFICATIONS Range 1 760 Units Torr Bleed Interface 3 32 inch Silicon I D Hose Vac Interface 3 8 inch I D Hose Sensor Isolated Transducer Display LCD Character Dimensions 2 75 high 5 5 wide 7 5 deep Power 100 240VAC 50 60 Hz CE rated INSTRUMENT ACCURACY 1 to 5 Torr 0 5 Torr 5 to 760 Torr 2 Torr Regulation Accuracy 2 Torr Regulation Repeatability 0 5 Torr For repair or recalibration return gauges to The DigiVac Company 105B Church Street Matawan NJ 07747 Ph 732 765 0900 Fax 732 765 1800 E mail Direct from our website www DigiVac com The DigiVac Company manufactures a complete line of vacuum gauges and process computers Contact us or your distributor if you wish for further information See www DigiVac com for our latest offerings 11 0 TERMS AND CONDITIONS TERMS OF USE LIMITED WARRANTY amp LIABILITY WAIVER THE DIGIVAC COMPANY DigiVac offers all of its products with the following terms and conditions and notices as follows By accepting and or using a DigiVac
3. by mode of operation 5 1 SWITCH FUNCTIONS Controls Loc local control Vacuum control will proceed according to the mode of Operation RMT remote control Ignores front panel switch settings Modes of Operation right switch Regulation up position regulates vacuum according to set point Off center position standby mode Full down position opens valve fully regardless of setting Purge Control left switch Purge Switch The center position in the normal Operation Ref Used for custom features such as the differential control feature Vent up position Placing the switch in the up position causes the vent valve to open igiVac paa VENT REGULATE SETPOINT ADJ Model 450 Differential Regulator Differential Sensor Vacuum Level b microcontroller Bleed Valve Proportional Valve Vacuum Pump Reference Vessel Vacuum Vessel 5 2 SOFTWARE The unit comes with 2 different versions of controller software 1 Software intended for directly connected vacuum pumps that relies on the leak characteristics of the vessel for bleed up and a proportional valve to control the vacuum applied to the vessel a This version of controller software lanicdsp hex has been shipping with our product since 2002 It is by far the most well deployed vacuum level control software in our portfolio b This version of software can have an o
4. product you hereby acknowledge and agree to the following terms and conditions and acceptance of these terms and conditions are a condition precedent to any purchase sale agreement between you and DigiVac Exclusive Obligation The DigiVac product you are purchasing has been designed for a specific use within a set of suitable operating conditions as set forth in its User Manual or as indicated otherwise by DigiVac Any use of the DigiVac Product for any purpose or under any conditions other than those specified shall render any limited warranty void and shall expressly invalidate any liability of DigiVac for damages as a result of such misuse User limitation You may not modify copy distribute transmit display perform reproduce publish license create derivative works from transfer or sell any information software products or services obtained from or created by DigiVac to any third party without the express written consent of DigiVac to do otherwise Any violation of this provision shall give rise to an indemnification of DigiVac by you for any third party claims arising out of such violation THIRTY 30 DAY LIMITED Warranty All DigiVac products are warranted against any manufactured defect for a period of thirty 30 days from date of purchase unless such product is a custom work for you and not a standard DigiVac product Any product qualifying as a custom work shall not be warranted against any defects for any purpose and your
5. 00 The voltage to the valve is controlled by using a PWM FET transistor pulse width modulating technique which allows precise positioning of the valve plunger without developing heat or EMI electro magnetic interface Model 450 Vacuum Regulator Vacuum Level microcontroller We Sensor Proportional Valve PC running optional VDS software a Vacuum Pump Vacuum Vessel 2 0 CONSTRUCTION The Model 450 is housed in a vinyl clad metal enclosure The valves and plumbing are mechanically fastened to the Aluminum plate base The circuitry and wiring all terminate on a control board near the display It has full manual control available via a dial on the front panel or can be controlled remotely via RS232 The Model 450 includes an easy to read back lit LCD display with an intuitive readout of the current vacuum level set point current vacuum level valve duty cycle and mode 3 0 UNPACKING AND INSPECTION After the DIGIVAC Model 450 is received it should be carefully unpacked and inspected for damage during shipment and for completeness In the event of a loss shipment a claim should immediately be made to the common carrier or the postal service as applicable Each Model 450 should come with A vacuum gauge controller An isolated vacuum sensor with enclosures An AC adapter that runs on 100 230VAC 50 60 Hz with line cord Pre tested under actual vacuum against a NIST standard
6. Home of Vacuum Engineering Excellence Precise Practical Personal DIGIVAC Model 450 INSTRUCTION MANUAL Digital Vacuum Gauge and Vacuum Level Controllers YOU MUST READ THIS MANUAL BEFORE USE The Digivac Company 105B Church Street Matawan NJ 07747 Email sales digivac com 732 765 0900 732 765 1800 FAX www Digivac com 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 CONTENTS Description and Principle of Operation Construction Unpacking and Inspection Installation Operation 5 1 Switch Functions 5 2 Software Servicing Maintenance and Calibration 6 1 Factory Repair and Calibration Notes on Calibration Understanding Torr Accessories and Modifications 10 0 Attachments Illustrations and Specifications 11 0 Terms and Conditions 1 0 DESCRIPTION AND PRINCIPLE OF OPERATION The DIGIVAC Model 450 Digital Vacuum Gauge is a self contained vacuum level control unit for maintaining pressures between 2 and 760Torr This instrument works in conjunction with a precision isolated integrated circuit pressure transducer and a large bore proportional solenoid valve to measure and control vacuum It has a proportional valve that allows the controller to make precise changes in vacuum flow to achieve a very stable vacuum level The unit has a bleed valve that adds bleed control from atmospheric pressure or customer supplied gas The DigiVac Model 450 operates when the valve opens proportionally from O to 1
7. acceptance of such custom work shall relieve DigiVac of any liability for any purpose WITH THE EXCEPTION OF THE LIMITED WARRRANTY ABOVE YOU AGREE ANY DIGIVAC PRODUCT IS PROVIDED AS IS EXCLUSIVE OF ANY WARRANTY INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE NON INFRINGEMENT OR ANY OTHER WARRANTY EXPRESSED OR IMPLIED Limitation Of Liability You agree and acknowledge DigiVac shall have no liability to you whatsoever for any direct indirect punitive incidental special consequential damages arising out of or connected with the use or misuse of its products In particular given the nature of DigiVac products you agree and acknowledge under no circumstances whatsoever shall DigiVac be liable to you for any consequential damages for damage to any non DigiVac product or service arising from the failure use or misuse of a DigiVac product including but not limited to any vacuum system engine vehicle factory or the like In the event a court of law with proper jurisdiction finds DigiVac liable to you for any purpose you agree and acknowledge DigiVac s maximum liability shall not exceed the purchase price of one unit of product giving rise to such liability or 250 00 whichever is greater Entire Obligation These terms and conditions express the entire obligation of DigiVac with respect to its products If any part of these terms and conditions are deemed void invalid unenforceable
8. e microns to other measures of pressure and vacuum Microns are not really a measure of vacuum at all but rather of absolute pressure It will be recalled that the pressure of the atmosphere is 14 696 or approximately 14 7 pounds per square inch at sea level This pressure is due to the weight of all of the air in the earth s atmosphere above any particular square inch This 14 696 psi is equivalent to the pressure produced by a mercury column of approximately 29 92 inches high or 76 meters about 3 4 of a yard or 760 millimeters of mercury Atmospheric pressure varies greatly with altitude It decreases approximately 1 inch of mercury per thousand feet of altitude It also varies widely with local weather conditions Variations of one half inch in a single day are common The word vacuum means pressure lower than atmospheric or suction but in describing negative pressure the atmosphere is only a satisfactory reference if we are dealing with values of vacuum down to about 27 inches of mercury Below that it is much more useful to talk in terms of absolute pressure starting from absolute zero The Model 450 measures from 2 760 Torr One TORR a commonly used unit is an absolute pressure of one millimeter of mercury A milliTorr is equal to one thousandth of a TORR A MICRON is the same as a milliTorr 9 0 ACCESSORIES AND MODIFICATIONS Optional Features Options Description NISTCal Calibration of a DIGIVAC vacuum gauge
9. or illegal including but not limited to the warranty disclaimers liability disclaimers and liability limitations set forth above then the unenforceable clause or sentence may be disregarded with the remainder of these terms and conditions valid and enforced In the event the unenforceable clause or sentence leaves a void in these terms and conditions a provision closely matching the intent of the unenforceable provision should be deemed inherent within these terms and conditions slightly modified to render such provision valid and enforceable General These terms and conditions are governed by the laws of the State of New Jersey USA You hereby consent to the exclusive jurisdiction and venue of the Courts of New Jersey in all disputes arising out of or relating to the use of this product Use of this product is unauthorized in any jurisdiction that does not give effect to all provisions of these terms and conditions Modification of Terms and Conditions DigiVac reserves the right to change the terms conditions and notices under which their products are offered
10. ptional RS232 port either PLC PC control or the optionally purchased VDC Valve Controller Digivac Software that allows the user to set 16 vacuum levels and duration to facilitate complex scientific scenarios and approach a ramp rate 2 Controller Software 8J22 that is intended for use with vessels that don t leak It can also be used to test scenarios that use house vacuums 6 0 SERVICING AND MAINTENANCE MAINTENANCE Your vacuum controller should give you many years of trouble free service There are no regularly scheduled maintenance intervals If consistent accuracy is required it is recommended that the gauge tube and power supple be returned for a yearly calibration check 6 1 FACTORY REPAIR AND CALIBRATION The vacuum gauge assembly is designed to provide years of trouble free service and the liberal internal use of plug in components make it easily repairable No field servicing of the unit is recommended other than replacement of the gauge tube but factory servicing and calibration are available at a nominal cost and fast turn around times 7 0 NOTES ON CALIBRATION Each DigiVac vacuum gauge controller is calibrated to the particular vacuum gauge sensor that is shipped with the unit Send back to factory if the calibration is in question 8 0 UNDERSTANDING TORR The DIGIVAC vacuum instrument and many similar instruments are calibrated in microns or milliTorr It is appropriate to discuss what microns are and to relat
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