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Ruska Instrument 7215 User Manual

Digital pressure controller
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DIGITAL PRESSURE
CONTROLLER
MODEL 7215
MODEL 7215i
MODEL 7215xi
USER'S MANUAL
RUSKA INSTRUMENT CORPORATION
10311 WESTPARK DR., HOUSTON, TEXAS 77042
(713) 975-0547 FAX: (713) 975-6338
!
E-MAIL: ruska@ruska.com
http://www.ruska.com
Release: 7215-1D01
Revision: C
Date: 10/13/00

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  • Page 1 DIGITAL PRESSURE CONTROLLER MODEL 7215 MODEL 7215i MODEL 7215xi USER’S MANUAL RUSKA INSTRUMENT CORPORATION 10311 WESTPARK DR., HOUSTON, TEXAS 77042 (713) 975-0547 FAX: (713) 975-6338 E-MAIL: ruska@ruska.com http://www.ruska.com Release: 7215-1D01 Revision: C Date: 10/13/00...
  • Page 2 WARRANTY Ruska Instrument Corporation warrants its products to conform to or exceed the specifications as set forth in its catalogs in use at the time of sale and reserves the right, at its own discretion, without notice and without making similar changes in articles previously manufactured, to make changes in materials, designs, finish, or specifications.

  • Page 3: Copyright Notice

    COPYRIGHT NOTICE Copyright © 1997 by Ruska Instrument Corporation. All rights reserved. This document may not be reproduced in part or in whole without the express written consent of Ruska Instrument Corporation. DISCLAIMER No representations or warranties are made with respect to the contents of this user’s manual. Further, Ruska Instrument Corporation reserves the right to revise this manual and to make changes from time to time in the content hereof without obligation to notify any person of such revision.

  • Page 4: Revision Notice

    REVISION NOTICE RELEASE DATE OF DESCRIPTION NUMBER RELEASE 7215-1D01 08/30/97 Original release 7215-1D01 08/01/99 Incorporated 7215i and 7215xi 7215-1D01 10/13/00 Changes in Section 7.2 per DC/RO-22717.

  • Page 5: Revision History

    REVISION HISTORY RELEASE 7215-1D01 Revision A (8/30/97) Original release RELEASE 7215-1D01 Revision B (08/01/99) Incorporated 7215i and 7215xi Per ECO 17806 RELEASE 7215-1D01 Revision C (10/13/00) Changes in Section 7.2 per DC/RO-22717...

  • Page 6: Safety Summary

    SAFETY SUMMARY The following are general safety precautions that are not related to any specific procedures and do not appear elsewhere in this publication. These are recommended precautions that personnel must understand and apply during equipment operation and maintenance to ensure safety and health and protection of property.

  • Page 7: Table Of Contents

    TABLE OF CONTENTS WARRANTY ..........................ii COPYRIGHT NOTICE ....................... iii REVISION NOTICE ........................iv REVISION HISTORY ........................v SAFETY SUMMARY ........................vi TABLE OF CONTENTS ......................vii SECTION 1: GENERAL INFORMATION INTRODUCTION....................1 GENERAL INFORMATION ................1 FEATURES ...................... 1 STANDARD EQUIPMENT & OPTIONS ............2 SECTION 2: THEORY OF OPERATION INTRODUCTION....................
  • Page 8 2.5.2 LOW OVERSHOOT MODE ............. 12 2.5.3 NORMAL MODE................12 2.5.4 ALIGNMENT OF INNER LOOP WITH OUTER LOOP..... 12 2.5.4.1 VACUUM AND SIMULATED ABSOLUTE SYSTEMS ..12 2.5.5 PID CONTROL ................13 TRANSDUCER MODULE ................13 2.6.1 QUARTZ BOURDON TUBE SENSOR (TRANSDUCER01)..... 13 2.6.2 SENSOR BOARD................
  • Page 9 SECTION 4: LOCAL OPERATION TUTORIAL ..................... 27 MEASURING PRESSURE ................29 4.2.1 SELECTING MODE OF OPERATION ..........29 4.2.1.1 SIMULATED ABSOLUTE INSTRUMENTS ...... 29 4.2.2 SELECTING PRESSURE UNITS ............ 29 4.2.3 DEFINING A NEW PRESSURE UNIT ..........29 4.2.4 CHANGING THE NUMBER OF DECIMALS ........30 4.2.5 SETTING THE ALARM LIMITS ............
  • Page 10 CONFIGURATION ..................38 4.5.1 CALIBRATION PASSWORD ............38 4.5.2 TEST ACCESS PASSWORD ............38 4.5.3 BAR GRAPH MAXIMUM..............39 4.5.4 KEY CLICK..................39 4.5.5 DATE/TIME ..................39 MEMORY CARD .................... 40 4.6.1 CARD SUPPORT ................40 4.6.2 SAVING/RESTORING SETUP INFORMATION ......40 4.6.3 SAVING/RESTORING CALIBRATION INFORMATION....
  • Page 11 ABSOLUTE INSTRUMENTS ........... 63 6.4.5.3 RPT - SIMULATED ABSOLUTE INSTRUMENTS.... 63 SENSOR PHOTOCELL ZEROING ..............63 6.5.1 7215 AND 7215i ................63 SECTION 7: PREPARATION FOR STORAGE & SHIPMENT DISCONNECTING THE DPC................. 65 PACKING INSTRUCTIONS ................65 SHIPPING INSTRUCTIONS ................67...
  • Page 12 FIGURE 2-2A: MODEL 7215 DPC GAUGE PNEUMATICS DIAGRAM........8 FIGURE 2-2B: MODEL 7215 DPC ABSOLUTE PNEUMATICS DIAGRAM......9 FIGURE 2-2C: MODEL 7215 DPC SIMULATED ABSOLUTE PNEUMATICS DIAGRAM ..9 FIGURE 2-2D MODEL 7215 DPC ABSOLUTE PNEUMATICS DIAGRAM (up to 50 PSI)..10 FIGURE 2-3: PRESSURE CONTROL LOW OVERSHOOT MODE........

  • Page 13: Section 1: General Information

    GENERAL INFORMATION INTRODUCTION This manual contains operation and routine and preventive maintenance instructions for the Model 7215 Digital Pressure Controller (DPC) manufactured by Ruska Instrument Corporation, Houston, Texas. This section of the manual provides general information about the DPC and presents its features and options.

  • Page 14: Standard Equipment & Options

    Additional Power Cords: Additional power cords are available for most countries. All options are summarized in Table 1-1. To order these items, please contact Ruska Instrument Sales in the U.S. at (713) 975-0547.

  • Page 15: Table 1-1: Options List For The Model 7215

    Table 1-1 Options List for the Model 7215 DPC Option Ruska Instrument Corp. Part Number (RIC #) LabView Driver (National Instruments) 7000-LABDRV Rack Mount Kit - Cabinets 18-24 inches deep 7000-903 Rack Mount Kit - Cabinets 24-30 inches deep 7000-904...
  • Page 16 NOTES INTRODUCTION...

  • Page 17: Section 2: Theory Of Operation

    SECTION 2 THEORY OF OPERATION INTRODUCTION The DPC’s power supply, electronics, pneumatics, and sensor combine to form a complete, stand–alone, measure and control instrument. This section of the manual describes the DPC’s component modules (figure 2–1) and provides a general discussion of each. Figure 2–1 DPC Block Diagram POWER SUPPLY...

  • Page 18: Electronics Module

    ELECTRONICS MODULE 2.3.1 CONTROL BOARD The Control Board monitors every major component of the Electronics Module. The Microprocessor Board, the Analog Loop Board, the IEEE–488 Interface, and the optional memory cards all plug into the Control Board. The Sensor Board and Front Panel both communicate with the Control Board via ribbon cables.

  • Page 19: Analog Control Board

    Table 2–1 Conversion Factors Unless specified otherwise, conversion factors are based on ANSI 268–1982. Symbol Description Conversion Factor InHg inches of mercury (0 °C) = kPa x 0.2952998 InHg inches of mercury (60 °F) = kPa x 0.296134 kiloPascals = kPa x 1.0 bars = kPa x 0.01 pounds per square inch...

  • Page 20: Pneumatics Module

    In the sections that follow, components SV01 through SV04 are all 24–volt, DC solenoid valves that are either open or closed depending on the DPC’s operational mode. Their behavior is summarized in table 2–2. Figure 2–2A Model 7215 DPC Gauge Pneumatics Diagram THEORY OF OPERATION...

  • Page 21: Figure 2-2B Model 7215 Dpc Absolute Pneumatics Diagram

    Figure 2–2B Model 7215 DPC Absolute Pneumatics Diagram Figure 2–2C Model 7215 DPC Simulated Absolute Pneumatics Diagram THEORY OF OPERATION...

  • Page 22: Measure Mode Pneumatics

    Figure 2–2d Model 7215 DPC Absolute Pneumatics Diagram (up to 50 psia FS) Table 2–2 Solenoid Valves States Valve Measure Mode Vent Control Mode Zeroing Test Port open open open close Zero close close - open close open Apply close...

  • Page 23: Barometric Sensor

    The Reference Port is isolated from the Test Port by a solenoid valve that is closed during the DPC’s Measure and Control modes. When the user commands the DPC to perform the zeroing process, the solenoid automatically opens, and the pressures on the Reference Port and Test Port become equal. The Reference Port is protected by a relief valve (RV01).

  • Page 24: Control Strategy

    based on feedback from the quartz Bourdon tube and an analog output setting which provides the desired setpoint for the inner loop. CONTROL STRATEGY 2.5.1 INNER VS OUTER LOOPS The inner loop is a high speed analog loop. The inner loop accepts a voltage signal from the outer loop and uses this signal as the pressure setpoint.

  • Page 25: 2.5.5 Pid Control

    2.5.5 PID CONTROL The outer loop pressure controller is a PID controller executed every 100 milliseconds (10 times per second). The pressure is controlled to an exponential decay curve. ∫ − − − A dt d S = Setpoint A = Actual V = Control Output p,i,d = Control Coefficients Figures 2–3 and 2-4 show typical Control mode operation.

  • Page 26: Transducer Module

    TRANSDUCER MODULE 2.6.1 QUARTZ BOURDON TUBE SENSOR (TRANSDUCER01) The quartz Bourdon tube sensor is mounted in a machined aluminum/steel housing. The sensor consists of a helical quartz tube with a mirror affixed to one end, as shown in figure 2-5. A rigid beam is attached transverse to the axis of the helical tube.

  • Page 27: Sensor Board

    Figure 2–6 Photocell/Light Spot 2.6.2 SENSOR BOARD A temperature sensor and the quartz Bourdon tube pressure sensor are monitored by the Sensor Board, which works with the Control Board to interpret pressure and temperature signals from these sensors and maintain the sensor housing at 50°C. 2.6.3 LINEARIZATION TERM As described in the previous section, the relationship between the pressure being measured and the current...

  • Page 28: Auxiliary Sensors

    OVEN CONTROL In the 7215 and 7215i models, the oven temperature is controlled via a pulse-width modulated signal running at 300 hertz. The time the heater is on can be varied from 0 to 100%. The pulse-width at startup is initialized to the previous value which was stored in battery-backed CMOS RAM.

  • Page 29: Pressure Reading And Correction

    Cycle Auxiliary Sensor Display The 7215xi contains dual sensor ovens and control is maintained somewhat differently. In the 7215 and 7215i models, the oven temperature is stable at 50.00 degrees Celsius. The 7215xi ovens will stabilize at a temperature within about 2 degrees of 50 C.
  • Page 30 Oven Temperature Slope − − 10 . OvenSetpoint OvenTemp Case Pressure Offset CasePressure FullScale Full scale pressure of the 7215 Vacuum Vacuum level for absolute measurements OvenSetpoint Oven temperature setpoint (50.0 °C) OvenTemp Current oven temperature reading Oven temperature offset factor...

  • Page 31: Section 3: Installation

    SECTION 3 INSTALLATION INTRODUCTION This section of the manual discusses initial installation for the Model 7215 DPC. Installing the DPC involves connecting the supply and test pressure tubing, powering up the unit, and configuring the system through the front panel.

  • Page 32: Cautions

    CAUTIONS The following cautions should be heeded at all times to ensure safe operation of the DPC. Never operate the DPC with the cover removed. The power supply has internal voltages near 400 volts. Never apply more than 120% of the DPC’s full scale as a pressure supply. Pressure supply must be regulated and meet all criteria as stated in Appendix A of this manual.

  • Page 33: Pressure Supply Port

    3.5.1 PRESSURE SUPPLY PORT The pressure supply port must be connected to a regulated source of clean, dry nitrogen or air. Shop air should not be used. Refer to Appendix A for supply port gas purity and pressure regulation requirements. Tubing must be of at least 1/8-inch (3-mm) inside diameter and of a sufficient wall thickness for the pressure.

  • Page 34: Vacuum Transducer Installation

    Figure 3-1 Model 7215 Back Panel 3.5.5 VACUUM TRANSDUCER INSTALLATION A vacuum port is provided inside the DPC to monitor vacuum levels and is required in the zeroing process for Absolute DPCs (5–100 psia). The following steps describe vacuum transducer installation.
  • Page 35 NOTES INSTALLATION...
  • Page 36 NOTES INSTALLATION...

  • Page 37: Section 4: Local Operation

    SECTION 4 LOCAL OPERATION This section of the manual describes operation of the DPC using the front panel. The local interface (front panel) consists of a vacuum fluorescent display and a set of keys. The display shows the system status and menu options.

  • Page 38: Figure 4-2 Menu Tree

    Figure 4-2 Menu Tree LOCAL OPERATION...

  • Page 39: Tutorial

    TUTORIAL To begin the tutorial, first verify that the DPC is powered-up and that the pneumatic connections have been completed. The DPC should display a screen similar to the one shown below. (The bottom line of the display should show the options. If an error message is displayed, press [F6], then press [PREV.]. This is the Main Menu.
  • Page 40 Step 5. When the unit desired is highlighted, press the [ENTER] key on the far right side of the front panel, under the numeric keypad. The display will return to the MENU/SETUP screen with the current units. Step 6. Press [PREV.] to return to the MENU screen. Step 7.

  • Page 41: Measuring Pressure

    This 7215 DPC is a Gauge and Vacuum (Negative Gauge) instrument with a barometric reference sensor. The summation of the pressure reading from the standard sensor in the 7215 and the pressure reading from the barometric sensor provides for the ‘simulated absolute’ pressure display. The Simulated Absolute 7215 can also be used as a gauge device when the barometric tare provided by the barometric reference sensor is turned off.

  • Page 42: Changing The Number Of Decimals

    The pressure units are defined from the Units Define Menu. From the Main Menu (press [PREV.] until the Main Menu appears) press Menu [F6], then Setup [F2], then Units [F3], and then Define [F1]. Press Next [F2] until the desired user-defined unit is highlighted. The following sequence is used to change the name of the selected unit.

  • Page 43: Zeroing

    2. Determine the vertical distance between the Pressure Reference Line and the sensing element in the device under test. The head height is set from the Setup User Menu. From the Main Menu (press [PREV.] until the Main Menu appears), press Menu [F6], then Setup [F2], and then User [F2]. Press Length [F1] to select either inches (in) or millimeters (mm) for the head height entry.

  • Page 44: Control Band

    Press the down arrow key until the label “Slew Rate” is highlighted. Use the numeric keypad to enter a new value for slew rate. Press [ENTER] to confirm. Entering values larger than the DPC can maintain results in the DPC running at its maximum slew rate. Press [PREV.] to exit the menu.

  • Page 45: Changes In Load Volume

    The current pressure reading is displayed in the upper right hand corner of the Control screen. If the DPC is in Control mode then the effects of changing the control parameters can be seen without leaving the Control screen. The following are simple definitions of the tunable parameters found in the Control screen. Stability - integration multiplier used in the controller.

  • Page 46: Programming Sequences

    to become more dynamic. If bias is increased, the system will become very dynamic. If frequency is also raised, then the controller will begin to become less dynamic. Stability - When large changes are made to the frequency and bias parameters, then the stability term will need to be adjusted to achieve peak performance.

  • Page 47: Entering A New Program

    MaxTime: The max time is the maximum time in seconds, including the dwell time, that the DPC can spend on one step of the program. After the max time elapses, the DPC will automatically proceed to the next setpoint in the program, even if the current setpoint has not been achieved. Thus, the max time selection limits the amount of time that the DPC can spend on any one setpoint.

  • Page 48: Changing The Name Of A Program

    Press Edit [F4]. Since “new” was highlighted, the DPC will create a new program and give a default name of NAMEnn where nn is a two digit number. The program editing screen will appear, displaying the first step. Press Auto [F3]. Using the numeric keypad, enter the values for Start, Stop, Tolerance, Dwell time, Max time, Points up, and Points down, pressing [ENTER] after each value.

  • Page 49: Changing The Configuration Stored With Aprogram

    To add a step to the program, first move to the step after the new step. For example, to insert a step between steps 3 and 4, move to step 4. Press Insert [F4]. To delete a step in the program, first move to the step to be deleted, then press Delete [F5]. To change a step in the program, move to the desired step.

  • Page 50: Sweep Test

    4.4.9 SWEEP TEST The sweep function can be used to automatically exercise the elastic sensing element of the device under test prior to performing a calibration. For the DPC to perform the sweep test, input the first and second setpoint pressures, the pressure control tolerance, the dwell time at setpoint, and the number of cycles to perform.

  • Page 51: Bar Graph Maximum

    4.5.6 FAN OPERATION The 7215 was designed to operate without a fan. However, in some applications when multiple systems are housed in consoles without adequate ventilation, the system may start generating Oven Control Failure ERROR codes. If this occurs, the internal fan can be turned on by the operator. Once the operator has commanded the instrument to turn on the fan, it will remain on even if the system is rebooted until it is commanded to turn off.

  • Page 52: Memory Card

    In the upper right potion of the display the numbers 1-9 are listed, each representing a solenoid driver. Under each number the solenoid status is displayed, "C" for closed and "O" for open. Press the right arrow key until the number "9" is highlighted. This is the fan solenoid driver. Press Open [F5} to turn the fan on, and Close [F6} to turn the fan off.

  • Page 53: System Sofware Update Procedure

    Ignores card and uses the currently installed application program. F3-Card Uses the application program on the card for this time only. (The card must be inserted every time the 7215 is restarted and this option pressed to continue to use the application program on the card.) F4-Update Installs the application program on the card as the permanent application.
  • Page 54 NOTES LOCAL OPERATION...

  • Page 55: Section 5: Remote Operation

    SECTION 5 REMOTE OPERATION CAPABILITIES The DPC can be operated remotely by a computer. Two interfaces are supported: IEEE-488 and RS-232. Both interfaces support SCPI (Standard Commands for Programmable Instruments). The IEEE-488 interface additionally supports emulation of a Ruska Single Channel Interface Panel (Models 6005-701 and 6005-761).

  • Page 56: Remote/Local Operation

    5.1.2 RS-232 The RS-232 interface supports standard serial operation from a computer to a single DPC. RS- 232 supports the IEEE-488.2 and SCPI commands. The DPC allows the following port setups: Baud Rate: 1200, 2400, 9600, or 19200 Data Bits: 7 or 8 Parity: Even, Odd, or None...

  • Page 57: Configuration

    CONFIGURATION The remote interface must be configured before it is connected. The remote interface is configured using the local interface. The parameters needed vary with the interface used. IEEE-488 Address, Protocol RS-232 Baud Rate, Data Bits, Parity, Stop Bits To configure the remote interface: 1.

  • Page 58: Scpi Response Format

    5.4.2 SCPI RESPONSE FORMAT Only commands ending in a question mark (?) have responses. Multiple values from a single command are separated by commas. Responses from different commands in the same message are separated by semicolons (;). The response message is terminated by a line feed (hexadecimal 0A).
  • Page 59 :DATA <n><number><number>, Set Calibration coefficients :VALue <number>? Gets nominal calibration point pressure :POINts? Gets number of calibration points :ZERO Performs Zero Calibration :VALUE<number> Sets Vacuum Value :INITiate Enter Zero Calibration Mode :INITiate? Status for Cal, Pressure, Temp., Reference Cal: 0=Not Zeroing, 1=Local Zero, 2=Remote Zero Pressure, Temperature, Reference:...
  • Page 60 Press1, Toler1, Dwell1, Max1, Press2, Toler2,... :DEFine? Read Program Definition :DELete [:SELected] Deletes Current Program :ALL Deletes All Programs :NAME <program name> Select Current Program :STATe RUN|PAUSe|STOP|CONTinue Set Program State :STATe? Read Program State :CONFigure :RECall Restore Saved Configuration :SAVE Save Current Configuration SENSE [:PRESSure]...

  • Page 61: Example Scpi Commands

    :QUEStionable [:EVENT]? Read/Clear Questionable Event Register :CONDition? Read Questionable Condition Register :ENABle <number> Set Questionable Enable Mask :PRESet Reset Condition Flags SYSTem :DATE <year>,<month>,<day> Set System Date :ERRor? Returns <error#,”descr;info”> Or 0,”No Error” :KLOCk ON|OFF|1|0 Lock Keyboard :TIME <hour>,<minute>,<second> Set System Time :VERSion? Returns 1991.0 :LANGuage “6000”|”SCPI”|"500"...

  • Page 62: Scpi Status Registers

    CAL:ZERO:INIT Enter Zero Mode CAL:ZERO:INIT? Read Status (Mode, Pressure, Temperature, Reference) and Wait Until Stable. CAL:ZERO:RUN Start Zero Adjust Sequence STAT:OPER:COND? Wait Until Complete (Bit 0 = 0) 5.4.6 SCPI STATUS REGISTERS Status Byte Register (STB), Service Request Enable Register (SRE) Bit 7 Operation status summary.

  • Page 63: 6005 Interface Panel Emulation

    Questionable Status (QUES:EVENT, QUES:CONDITION, QUES:ENABLE) Bit 0 Reserved. Bit 1 Reserved. 0. Bit 2 Time is questionable. Set when the clock has not been set. Bit 3. Temperature is questionable. Set when the oven temperature is not within range. Bit 4 Reserved.

  • Page 64: Druck Dpi-510 Emulation Command Summary

    When only one unit is attached, the Control-C (hexadecimal 03) command will clear the transmit and receive buffers and disable addressing. When addressing is disabled, the unit will respond to commands without being addressed. DRUCK DPI-510 EMULATION COMMAND SUMMARY 5.7.1 SUPPORTED COMMANDS B <value>...

  • Page 65: Response Formats

    5.7.2 RESPONSE FORMATS <Pressure or Setpoint><REM|LOC>RnSnDn[@nn] <Pressure or Setpoint>[@nn] <REM|LOC>RnSnDnCnInFn <In Limit Status>[@nn] @nEnJnVnnnnUaaaa NOTE: Secondary addressing is not supported. 5.7.3 RESET CONDITIONS N0 D0 F0 I0 @1 R0 S0 W002 5.7.4 KEYBOARD ENTRY MENU/SETUP/REMOTE/510EMUL Termination: CR/LF/EOI, CR/EIO, LF/EOI, or EOI Zero Delay: Delay for zero stabilization.
  • Page 66 command is received the zeroing valve is opened, the system waits the zero delay time and then the sensor is zeroed. Rate If the rate is positive it will be used at the maximum rate with the overshoot set to low. If the rate is zero then the maximum rate will be used with the overshoot set to low.

  • Page 67: Section 6: Maintenance

    SECTION 6 MAINTENANCE INTRODUCTION Very little maintenance is normally required for the DPC. This section of the manual discusses suggested procedures. OBSERVING THE SOFTWARE VERSION NUMBER Follow the steps below to observe the DPC’s software version number. If necessary, press [PREV.] several times to return the display to the Main Menu. Select MENU/SETUP/SYSTEM.

  • Page 68: Table 6-1: Electronic Self Test

    Table 6-1 Electronics Self Test Test Description Action on failure RIC Part # Coprocessor Tests the 80-287 math coprocessor chip Replace chip. 13-932 Replace processor board. 7000-286-16 Clock Tests the real time clock Replace processor board. 7000-286-16 Timer Tests the 10 ms interval timer Replace.

  • Page 69: Removing The Dpc's Cover

    6.3.2 REMOVING THE DPC’S COVER The DPC should be kept clean and completely assembled at all times. Operating the DPC without its cover affects the DPC’s thermal gradients and therefore may reduce precision. If it becomes necessary to remove the DPC’s cover, follow the instructions below. CAUTION: CAUTION: The DPC should only be opened by qualified electrical/mechanical...

  • Page 70: Memory Card Battery

    6.4.1 CALIBRATION INSTRUCTIONS To calibrate the DPC, the user connects a calibration standard such as the Ruska Instrument Model 2465 Gas Piston Gauge to the DPC’s test port, then follows the three-step calibration procedure on the DPC’s display. This procedure requires the user to control the calibration standard to 50% and 100% of the DPC’s full scale rating (section 3.4.1).
  • Page 71 To access the calibration screen, select MENU/CAL. To begin the calibration process, press the recessed calibration button beneath the vacuum fluorescent display. If the calibration access code is enabled, enter it at the prompt. The first calibration screen will appear. NOTE: NOTE: To exit the calibration procedure before the calibration coefficients have...

  • Page 72: Storing The Coefficients

    6.4.1.2 STORING THE COEFFICIENTS Step 4 Calibration is complete. o exit the calibration procedure without storing the calibration coefficients in memory, press [CANCEL]. To store the calibration coefficients in memory, select OK [F6]. NOTE NOTE NOTE NOTE In additional to saving the calibration coefficients to the DPC's memory, : : : : the user is advised to separately record the calibration coefficients and store this "backup"...

  • Page 73: Rpt Calibration - Simulated Absolute

    the Bourdon tube from the bell jar vacuum when drawing a hard vacuum to seal the bell jar and float the masses. Once the masses have risen in response to evacuation of the bell jar, close the reference vacuum cutoff valve and use the metering valve on the bell jar to adjust the atmosphere until the masses begin to sink.

  • Page 74: Zeroing

    To edit the calibration coefficients, press the recessed Calibrate button beneath the vacuum fluorescent display. If the calibration access code is enabled, enter it at the prompt. The first calibration screen will appear. NOTE: NOTE: NOTE: NOTE: To exit the calibration procedure before the calibration coefficients have been changed, press [CANCEL] any time during the procedure.

  • Page 75: Gauge And Vacuum (Negative Gauge) Instruments

    6.4.5.1 GAUGE AND VACUUM (NEGATIVE GAUGE) INSTRUMENTS Verify that the Reference Port is open to atmosphere. Enter the Calibration screen by selecting MENU/CAL. Select Zero [F1]. Do NOT press the recessed Calibrate button. Do not disturb the instrument while zeroing is in process. Wait for the zeroing procedure to finish.
  • Page 76 6.5.1 7215 & 7215i If the error message “Mechanical Zeroing Needed” is displayed, the sensor photocell must be zeroed. The following steps describe this process. CAUTION: CAUTION: The DPC should only be opened by qualified electrical/mechanical CAUTION: CAUTION: service technicians. Lethal voltages are present and exposed in the power supply and display.

  • Page 77: Figure 6-5 Photocell Location

    Figure 6-5 Photocell Location MAINTENANCE...

  • Page 78: Section 7: Preparation For Storage & Shipment

    SECTION 7 PREPARATION FOR STORAGE & SHIPMENT NOTE: NOTE: The procedures given in sections 7.1 through 7.3 must be strictly NOTE: NOTE: adhered to in order to prevent damage to the instrument. Failure to follow these procedures will likely result in damage to the DPC during shipment.
  • Page 79 bag inside the box. PREPARATION FOR STORAGE & SHIPMENT...
  • Page 80 The DPC must be prepared for shipment in the following manner: Ruska Instrument has an RMA procedure in place. Please contact the Customer Service Center to obtain an RMA number prior to returning any equipment to Ruska. Have the following information available when contacting Ruska:...

  • Page 81: Shipping Instructions

    Figure 7-1 Packing the DPC SHIPPING INSTRUCTIONS Ruska recommends using air freight for transportation. Surface transportation subjects the shipment to more frequent handling and much more intense shock. In most cases, if surface transportation is the mode of transport employed, handling damage is likely. Again, it is essential that the procedures mentioned in sections 7.1 through 7.3 be strictly adhered to in order to prevent any shipping and handling damage to the instrument.
  • Page 82 NOTES PREPARATION FOR STORAGE & SHIPMENT...

  • Page 83: Accuracy

    APPENDIX A SUMMARY OF SPECIFICATIONS ACCURACY Specifications of pressure transducer instrumentation can be divided into three categories: Input Specifications, General Specifications, and Performance Specifications. Each of these categories in turn consists of parameters that are usually specified by minimum and/or maximum numeric limits. Almost all of these parameters can have an effect on what is generally referred to as the instrument’s “accuracy.”...

  • Page 84: Specifications

    SPECIFICATIONS GENERAL SPECIFICATIONS Pressure Range: 5 - 3000 psi; 0.7 - 200 bar. Display: Graphical vacuum florescent Display Resolution: User-selectable up to 1:1,000,000 Electrical Power: 90–260 VAC, 47 - 63 Hz (50-400 Hz for i/xi models), 150 W Operating Temperature: 18–36°C Storage Temperature: –20–70°C...

  • Page 85: Table A-1: Performance Specifications

    PERFORMANCE Table A-1 Performance Specifications: 7215 Pressure Range 5–1000 psi 1000–2500 psi 3000 psi 15–100 psi (0.34–68.9 bar) (68.9–172 bar) (207 bar) (1–6.9 bar) Gauge Gauge Gauge Absolute Mode Precision 0.007% FS 0.007% FS 0.01% FS 0.007% FS Stability Over 1 0.01% RDG...
  • Page 86 GAS SPECIFICATIONS Pressure Source Medium: Clean Dry Air or Nitrogen* Pressure Source Particle Size ≤50 microns Contamination: Pressure Source Max. Moisture Content: -50 °C dew point Pressure Source Max. Hydrocarbon Content: 30 ppm VACUUM REQUIREMENTS Supply Vacuum: 50 liters per minute (minimum) (absolute units only) Bypass Supply Vacuum Valve for High Pressure Gauge work * Industrial grade nitrogen, 99.5% pure...

  • Page 87: Appendix Bsummary Of Error Messages

    APPENDIX B SUMMARY OF ERROR MESSAGES Negative error numbers are from the Standard Commands for Programmable Instruments (Version 1991.0). Value Description and Corrective Action No Error. -103 Invalid Separator. Check punctuation in the SCPI command. -104 Data Type. The type of parameter data is incorrect. -109 Missing Parameter.
  • Page 88 Mechanical Zeroing Needed. The zero point of the quartz Bourdon sensor is beyond the range of the compensation circuit. The zero is adjusted by the software but should be manually adjusted for complete accuracy. Oven Control Failure. The temperature controller is unable to keep the sensor at the proper temperature.

This manual is also suitable for:

7215i7215xi

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