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Summary of Contents for Sierra 760S Series
- Page 1 Series 760S/780S UHP Instruction Manual Table of Contents 760S/780 UHP Series Insertion Mass Flow Meter Instruction Manual Part Number IM-76S-78S-UHP Revision G, August 2018 GLOBAL SUPPORT LOCATIONS: WE ARE HERE TO HELP! IM-76S-78S-UHP...
- Page 2 Sierra Instruments. The information contained in this manual is subject to change without notice.
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Page 3: Table Of Contents
Using this Manual ..............1-1 Note and Safety Information ..........1-2 Receipt of System Components ..........1-2 Technical Assistance ............. 1-2 The Sierra Flow Sensing Principle ..........1-3 Smart Electronics Features ............1-4 Enclosure Options ............... 1-5 ™ Smart Interface Software ............ - Page 4 Troubleshooting the Flow Meter ..........4-1 Returning Equipment to the Factory ........... 4-3 Appendix A Product Specifications Appendix B Warranty Policy List of Figures 1-1. Sierra Steel-Trak™ Sensor ..........1-3 2-1. Flow Meter Orientation ..........2-3 2-2. Wiring Access NEMA 4X Enclosures ......2-5 2-3.
- Page 5 Series 760S/780S UHP Instruction Manual Table of Contents List of Tables 2-1. Pipe Length Requirements for Installation ..... 2-2 3-1. Electronics Validation Results ........3-15 3-2. Sensor Validation Results ..........3-16 IM-76S-78S-UHP...
- Page 6 Table of Contents Series 760S/780S UHP Instruction Manual Warnings and Cautions Warning! All wiring procedures must be performed with the power Off. Warning! To avoid potential electric shock, follow National Electric Code safety practices or your local regulations when wiring this unit to a power source and to peripheral devices. Fail- ure to do so could result in injury or death.
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Page 7: Chapter 1 Introduction
Chapter 1 Introduction Chapter 1 Introduction Series 760S/780S UHP Mass Flow Meters Sierra’s Series 760S/780S UHP Smart Mass Flow Meters provide a reliable solution for monitoring ultra-clean gas mass flow rates. Low-flow sensitivity, fast response and outstanding rangeability have made these models the instruments of choice for many critical gas flow applications. -
Page 8: Note And Safety Information
If the problem persists after following the troubleshooting procedures outlined in Chapter 4, contact Sierra Instruments by fax or by E-mail (see inside front cover). For urgent phone support you may call (800) 866-0200 or (831) 373-0200 between 8:00 a.m. and 5:00 p.m. PST. -
Page 9: The Sierra Flow Sensing Principle
™ Sierra’s unique Steel-Trak sensor probe is responsible for the un- surpassed accuracy, ruggedness and reliability of Sierra industrial flow meters. The immersible Steel-Trak sensor consists of two sensing elements–a velocity sensor and a temperature sensor that automatically corrects for changes in gas temperature. -
Page 10: Smart Electronics Features
Chapter 1 Introduction Series 760S/780S UHP Instruction Manual Smart Electronics Features Instrument Validation Two simple tests offer full “field-validation” of your Smart mass flow meter. The first test checks the system electronics, linearization and microprocessor functionality and is performed by injecting a known input value and confirming that the flow meter outputs the expected value. -
Page 11: Enclosure Options
Smart Interface Software ™ ™ Sierra’s Smart Interface Windows -based software is available for connecting your PC directly to the mass flow meter. An RS-232 se- rial cable along with floppy disks containing the program and sys- tem files are available from the factory. See the Smart Interface User Guide included with the software package for operating instructions. -
Page 12: Installation Overview
Chapter 2 Installation Chapter 2 Installation Installation Overview Sierra Series 760S/780S UHP meters are available with a wide vari- ety of process connections. For ease of installation, the meters are Warning! pre-assembled with the sensor probe installed in the flow body. -
Page 13: Unobstructed Flow Requirements
Chapter 2 Installation Series 760S/780S UHP Instruction Manual Unobstructed Flow Requirements Select an installation site that will minimize possible distortion in the flow profile. Valves, elbows, control valves and other piping compo- nents may cause flow disturbances. Check your specific piping condi- tion against the examples shown below. -
Page 14: Installing The Flow Meter
Series 760S/780S UHP Instruction Manual Chapter 2 Installation Installing the Flow Meter Enclosure SIERRA adjustable to any viewing position Flow direction indicator should point downstream in the direction of flow FLOW Figure 2-1. Flow Meter Orientation (Flange Connection Shown) When positioning the flow meter, refer to the flow direction indicator attached to the probe. -
Page 15: Changing Display Orientation
Chapter 2 Installation Series 760S/780S UHP Instruction Manual Changing Display Orientation (Hazardous-Area Enclosures Only) Depending on installation requirements, you may need to change the position of the optional display. To rotate the display board: 1. Use a 1/16-inch hex key to loosen the set screw securing the larger end of the enclosure. -
Page 16: Wiring Connections
Series 760S/780S UHP Instruction Manual Chapter 2 Installation Wiring Connections For NEMA 4X enclosures, use TB2 for power and signal connec- tions, TB1 is for sensor connections. (The terminal designations are labeled inside the enclosure cover.) Warning! To avoid potential electric shock, follow National Elec- Wiring connections NEMA 4X enclosure... -
Page 17: Input Power Wiring
Chapter 2 Installation Series 760S/780S UHP Instruction Manual Input Power Wiring AC Power Wiring The AC power wire size must be 26 to 16 AWG with the wire Warning! stripped 1/4 inch (6 mm). Connect 100 to 240 VAC (300 mA load, All wiring procedures must maximum) to the Neutral and Line terminals on the small, two- be performed with the power... - Page 18 Series 760S/780S UHP Instruction Manual Chapter 2 Installation DC Power Wiring The DC power wire size must be 26 to 16 AWG with the wire stripped 1/4 inch (6 mm). Connect 18 to 30 VDC (625 mA load, Warning! maximum) to the terminals marked PWR+ and PWR– on the terminal All wiring procedures block.
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Page 19: Output Signal Wiring
Chapter 2 Installation Series 760S/780S UHP Instruction Manual Output Signal Wiring Output signal cable should be completely screened with a 100% shield. You must use metal cable glands that provide cable screen clamping. The cable screen should be connected to the gland and shielded at both ends over 360 degrees. - Page 20 Series 760S/780S UHP Instruction Manual Chapter 2 Installation 4-20 mA Output Wiring The 4-20 mA current loop output can be self-powered (non-isolated) or externally powered (isolated). To use the 4-20 mA isolated output, an external 12 to 36 VDC power supply is required. The maximum loop resistance (load) for both types of current loop outputs are de- pendent upon the supply voltage and are given in Figure 2-10.
- Page 21 Chapter 2 Installation Series 760S/780S UHP Instruction Manual NEMA 4X Enclosures Current R load 4-20 out (+) 4-20 out (–) – 12 VDC 36 VDC Figure 2-11. Isolated 4-20 mA Current Loop Connections NEMA 4X Enclosures Jumper AUX PWR OUT Current R load 4-20 out (+)
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Page 22: Alarm Output Wiring
Series 760S/780S UHP Instruction Manual Chapter 2 Installation Alarm Output Wiring Two alarm outputs (Low Alarm and High Alarm) are included on the flow meter terminal block. The alarm outputs use optical relays that are normally-open single-pole relays with one common connection. There are two connection options for alarm outputs–the first with a sepa- rate power supply (isolated) and the second using the flow meter power supply (non-isolated). -
Page 23: Remote Sensor Probe Wiring
When connecting the sensor probe to a remotely mounted flow meter enclosure, use only factory supplied cables. The electronics, Caution! sensors and interconnecting cables supplied by Sierra Instruments Changing the length of cables are calibrated as a complete precision mass flow circuit. - Page 24 Series 760S/780S UHP Instruction Manual Chapter 2 Installation NEMA 4X Enclosures Remote Sensor enclosure probe GREEN Te mperature V el oc ity se nso r se nso r ORANGE WHITE BLACK N ote: S ens or w i re col or ma y vary - s ee l abe l i n cov er Figure 2-19.
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Page 25: Range Selection Wiring
Chapter 2 Installation Series 760S/780S UHP Instruction Manual Hazardous-Ar ea Enclosures Sensor probe junction box GREEN ORANGE Remote enclosure WHITE BLACK N ote: S ens or w i re col or may va ry - see l ab el i n cov er Figure 2-22. -
Page 26: Flow Meter Start Up
Series 760S/780S UHP Instruction Manual Chapter 3 Operation Chapter 3 Operation This chapter covers flow meter operation, programming and instru- ment validation procedures. All instructions include directions for using either the optional LCD display or the internal Smart electron- ics device for programming. If your meter is not equipped with the optional display, you will need a good quality digital voltmeter or multimeter for programming and validation procedures. -
Page 27: Using The Smart Electronics Basic Features
Chapter 3 Operation Series 760S/780S UHP Instruction Manual Using the Smart Electronics Basic Features This section covers the basic features of the Smart electronics and in- cludes instructions on: • entering alarm parameters Caution! • changing the user full scale Before making any ad- justment to the Smart •... -
Page 28: Lcd Display Programming Menu
Series 760S/780S UHP Instruction Manual Chapter 3 Operation LCD Display Programming Menu Start Up Screens Sierra Flow meter model Flow Meter Software version Version Meter serial number Serial No. Run Mode LCD Display FUNCTIONS Current flow rate Flow Totalized flow... -
Page 29: Single-Digit Led Programming Menu
Chapter 3 Operation Series 760S/780S UHP Instruction Manual Single-Digit LED Programming Menu Run Mode FUNCTION Software version Assignments Version shown in series of 3 digits Voltage Zero Press Range Range in use FUNCTION Voltage Span Press FUNCTION to view or Current Zero change settings. -
Page 30: Entering Alarm Parameters
If you choose not to use reporting or measuring gas the high alarm for a specific alarm function, Sierra recommends that flow during adjustments. you set the high alarm at 100% of the user full scale setting which creates an “over-range”... -
Page 31: K-Factor Adjustment
Chapter 3 Operation Series 760S/780S UHP Instruction Manual K-Factor Adjustment Entering a K-factor adjusts the meter’s output signal without affect- ing the factory calibration curve. Use the K-factor calibration offset for additional flow profile compensation (the factory includes an ini- tial flow profile correction in the calibration curve of the unit). -
Page 32: User Full Scale Adjustment
Series 760S/780S UHP Instruction Manual Chapter 3 Operation User Full Scale Adjustment The user full scale (UFS) feature adjusts the flow meter output range anywhere within 50% to 100% of the factory full scale (FFS). This feature allows you to re-range the voltage or current output of the Caution! The flow meter must not be meter to accommodate different flow rates. -
Page 33: Time Response Delay Adjustment
Chapter 3 Operation Series 760S/780S UHP Instruction Manual Time Response Delay Adjustment Changing the Time Response Delay using the LCD Display 1. Select FUNCTION, enter the password. Select FUNCTION again until Time Response appears on the display. 2. Use UP or DOWN to adjust the time response delay from 0.10 to 7.2 seconds. -
Page 34: Totalizer Reset
Series 760S/780S UHP Instruction Manual Chapter 3 Operation Totalizer Reset If your device is equipped with the optional LCD display, reset the totalizer using the magnetic switches or device buttons. If you are unable to open the flow meter enclosure, use a magnet to reset the totalizer as shown below. -
Page 35: Using The Smart Electronics Advanced Features
Series 760S/780S UHP Instruction Manual Chapter 3 Operation Using the Smart Electronics Advanced Features Zero and span (Function 1 through 4) can be used to validate system operation and calibrate the digital to analog signals on the Smart Caution! electronics device. Additionally, these functions can compensate for Adjusting zero or span will resistance in long signal cables connected to your data collection or affect meter calibration. -
Page 36: Current Zero Adjustment
Chapter 3 Operation Series 760S/780S UHP Instruction Manual Note: when adjusting zero the current signal will be driven to 4 mA and when adjusting span the current signal will be driven to 20 mA. We recom- mend recording the current values before making any changes to the current zero or span settings. -
Page 37: Instrument Validation
Series 760S/780S UHP Instruction Manual Chapter 3 Operation Instrument Validation System electronics are verified by injecting a known input value and confirming that the flow meter outputs the expected value. This test confirms that the microprocessor, analog to digital and digital to analog converters, the linearizer and the display are working prop- erly. -
Page 38: Electronics Validation Procedure
Chapter 3 Operation Series 760S/780S UHP Instruction Manual Electronics Validation Procedure 1. Verify the flow meter is off line from any remote communica- tions. Make sure the meter’s user full scale setting is the same as the factory full scale setting. If not, adjust the user full scale Caution! value as needed. -
Page 39: Sensor Validation Procedure
Series 760S/780S UHP Instruction Manual Chapter 3 Operation Calibration Certificate Values Validation Test Results Flow Flow Sample Bridge Indicated Output Indicated Meter Output Meter Point Voltage Flow (V or mA) Flow Stated (V or mA) Stated (LCD) Accuracy Accuracy 100% Table 3-1. - Page 40 Chapter 3 Operation Series 760S/780S UHP Instruction Manual 4. Set the multimeter to read Ohms in the 2K range. Connect the multimeter to the terminals of J5 and J6 (temperature sensor). Measure the resistance between J5 and J6 and record the tem- perature sensor resistance (in Ohms) in Table 3-2.
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Page 41: Chapter 4 Troubleshooting And Repair
Flow Meter Calibration Sierra Instruments maintains a fully-equipped calibration laboratory. All measuring and test equipment used in the calibration of Sierra meters are traceable to NIST standards. Sierra is ISO-9001 regis- tered and conforms to the requirements of ANSI/NCSL-Z540 and ISO/IEC Guide 25. - Page 42 Chapter 4 Troubleshooting & Repair Series 760S/780S UHP Instruction Manual Problem Possible Cause Solution Velocity measurement is Very erratic or non-uniform flow Follow installation requirements shown erratic or fluctuating in Chapter 2 Moisture present in gas flow Install a water trap or filter upstream of the flow meter sensor Flow conditioning plates are not Correct flow meter orientation...
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Page 43: Returning Equipment To The Factory
Returning Equipment to Factory Before returning any mass flow meter to the factory, you must re- quest and complete a Sierra Calibration/Repair Data Sheet. To obtain the data sheet contact Customer Service at: (800) 866-0200 or (831) 373-0200 in the US or +31(0)20-6145810 in Europe. -
Page 44: Appendix A Product Specifications
Series 760S/780S UHP Instruction Manual Appendix A Specifications Appendix A Product Specifications IM-76S-78S-UHP... - Page 45 Appendix A Specifications Series 760S/780S UHP Instruction Manual IM-76S-78S-UHP...
- Page 46 Series 760S/780S UHP Instruction Manual Appendix A Specifications IM-76S-78S-UHP...
- Page 47 Appendix A Specifications Series 760S/780S UHP Instruction Manual IM-76S-78S-UHP...
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Page 48: Appendix B Warranty Policy
Appendix B Warranty Policy Limited Warranty Policy- Register Online All Sierra products are warranted to be free from defects in material and workmanship and will be repaired or replaced at no charge to Buyer, provided return or rejection of product is made within a reasonable period but no longer than one (1) year for calibration and non-calibration defects, from date of delivery.
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