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Series 780-CT Instruction Manual
Table of Contents
Sierra Series 780
Custody Transfer
Mass Flow Monitoring System
Instruction Manual
Part Number IM-78-CT
10.97 Revision B
5 Harris Court, Building L Monterey, CA 93940
(831) 373-0200 (800) 866-0200
Fax (831) 373-4402
http://www.sierrainstruments.com
Sierra Instruments b.v. Bolstoen 30A 1046 AV Amsterdam The Netherlands
31(0)20-6145810 Fax 31(0)20-6145815
0-1
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Table of Contents
Troubleshooting
Related Manuals for Sierra 780 Series
Summary of Contents for Sierra 780 Series
- Page 1 Mass Flow Monitoring System Instruction Manual Part Number IM-78-CT 10.97 Revision B 5 Harris Court, Building L Monterey, CA 93940 (831) 373-0200 (800) 866-0200 Fax (831) 373-4402 http://www.sierrainstruments.com Sierra Instruments b.v. Bolstoen 30A 1046 AV Amsterdam The Netherlands 31(0)20-6145810 Fax 31(0)20-6145815...
- Page 2 Unless you have specifically ordered Sierra’s optional O cleaning, this flow meter may not be fit for oxygen service. Sierra Instruments, Inc., is not liable for any dam- age or personal injury, whatsoever, resulting from the use of Sierra Instruments standard mass flow meters for oxygen gas.
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Page 3: Table Of Contents
Series 780-CT Instruction Manual Table of Contents Table of Contents Chapter 1 Introduction Series 780-CT Mass Flow Monitoring System ....1-1 Using this Manual..........1-1 Notes and Safety Information........1-1 Receipt of System Components .........1-2 Technical Assistance..........1-2 How the Flow Monitoring System Works......1-3 Series 780-CT Mass Flow Meter Features.....1-4 Series 900 Collector-Box Features......1-4 Chapter 2 Installation... - Page 4 Table of Contents Series 780-CT Instruction Manual Chapter 4 Validation and Maintenance Procedures Field Validation Procedures ..........4-1 Sensor Test Procedures...........4-1 Electronic Test Procedures........4-2 Entering Bias Factors..........4-4 Bias Factor Procedure ..........4-5 Maintenance Procedures ..........4-6 Obtaining an RMA.............4-7 Chapter 5 Troubleshooting System Diagnostics............5-1 Troubleshooting Procedures..........5-2 Appendix A Product Specifications Specifications and Drawings .........A-1...
- Page 5 Before applying power for the first time, make sure all wiring is in compli- ance with the instructions listed in Chapter 2. The electronics, sensors and interconnecting wires supplied by Sierra In- struments are calibrated as a single precision mass flow meter. Each component is an integral part of the flow measurement circuit.
- Page 6 Table of Contents Series 780-CT Instruction Manual...
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Page 7: Chapter 1 Introduction
780-CT system components include a Sierra Series 780-CT Mass Flow Meter with built in flow conditioning plates and a Sierra Series 900 Collector-Box ™... -
Page 8: Receipt Of System Components
Chapter 1 Introduction Series 780-CT Instruction Manual Receipt of System Components When receiving the components of the Sierra Flow Monitoring System, carefully check the outside packing carton for damage in- curred in shipment. If any carton is damaged, notify the local carrier and submit a report to the factory. -
Page 9: How The Flow Monitoring System Works
Series 780-CT Instruction Manual Chapter 1 Introduction How the Flow Monitoring System Works Series 900 Collector-Box Collector-Box Series 780-CT Mass Flow Meter Heat Gas Flow Ts Ta Flow Sensors (Aligned 90-degrees to flow) Sensor Detail Figure 1-1. Flow Monitoring System Block Diagram The 780-CT Mass Flow Meter measures gas flow using two sensing elements–a velocity sensor and a temperature sensor that automati- cally correct for changes in gas temperature. -
Page 10: Series 780-Ct Mass Flow Meter Features
Chapter 1 Introduction Series 780-CT Instruction Manual Series 780-CT Mass Flow Meter Features Series 780-CT mass flow meter bodies are constructed of 316L stainless steel tubing. The 780 flow body incorporates special flow conditioning plates welded into the body between the sensor and the inlet connection. -
Page 11: Chapter 2 Installation
Series 780-CT Instruction Manual Chapter 2 Installation Chapter 2 Installation Installation Overview The Sierra Series 780-CT Flow Monitoring System installation is simple and straightforward. Included in this chapter are these basic installation procedures: • Installing system components • Wiring connections •... -
Page 12: Flow Meter Installation Requirements
Chapter 2 Installation Series 780-CT Instruction Manual Flow Meter Installation Requirements In order to achieve accurate and repeatable performance, the mass flow meter must be installed with the specified minimum length of straight pipe upstream of the flow meter sensor. Use this table to determine the piping requirements for your installation site. -
Page 13: Flow Meter Orientation
Series 780-CT Instruction Manual Chapter 2 Installation Flow Meter Orientation When installing the flow meter, reference the flow direction label attached to the flow body. Install the meter with the label pointing in the same direction as gas flow. This ensures the sensors are cor- Caution! For proper operation, the rectly aligned at 90-degrees to the gas flow. -
Page 14: Collector-Box Installation
Chapter 2 Installation Series 780-CT Instruction Manual Collector-Box Installation Figure 2-2. Collector-Box Mounting Dimensions To install the Collector-Box: 1. Mount the enclosure in an upright position in a dry, vibration- free location out of direct sunlight. The ambient temperature range should remain within 32°F to 122°F (0 to 50°C). 2. -
Page 15: Wiring Connections
Do not shorten the length or replace the interface cable supplied by Sierra Instruments. This cable is calibrated as an integral part of the precision flow measurement circuit. Changes to the cable length or cable substitution may impair the accuracy of the flow reading. -
Page 16: Sensor Wiring
Chapter 2 Installation Series 780-CT Instruction Manual Sensor Wiring Use the supplied interface cable to connect between the flow meter and the Collector-Box. To connect the components: 1. Release two latches on the Collector-Box to open the clear plas- tic front panel. 2. -
Page 17: Collector-Box Outputs
Series 780-CT Instruction Manual Chapter 2 Installation Collector-Box Outputs 0-5 VDC and 4-20 mA Output Signal The Collector-Box is equipped with 0-5 VDC and 4-20 mA out- put signals. The full scale flow value (represented by 5 VDC and 20 mA) may be modified via the <CONF.> setup procedure described in Chapter 3. -
Page 18: Relay Board Terminal Block Designations
Chapter 2 Installation Series 780-CT Instruction Manual Relay Outputs The Collector-Box has four relay outputs. The outputs are located on two terminal blocks, TB3 and TB4, located on the motherboard above and below TB1 (see Figure 2-3 for locations). The relay outputs supply dry contacts and provide a Common, Normally Open, and Normally Closed circuit rated for 5 A at 115/230 VAC and 0.5 A at 24 VDC. -
Page 19: Chapter 3 Operating Instructions
A full range of commands are available through the display/keypad. The features of each operator key are described on the following pages. DISPLAY FUNCTIONS FLOW TOTAL ALARM SIERRA MODE Collector-Box Fast Slow Units SENSOR FAULT RS485... -
Page 20: Display Selections
Chapter 3 Operation Series 780-CT Instruction Manual DISPLAY Selections FLOW Type of Flow Units Displayed Pressing the <FLOW> button 1. Velocity SFPM or NMPS displays the actual flow. Three types of flow and eight differ- 2. Standard- SCFM, SCFH, or ent engineering units are se- Volumetric Flow NM3H... -
Page 21: Totalizer Reset
Series 780-CT Instruction Manual Chapter 3 Operation Totalizer Reset To reset the Totalizer to zero: 1. Press <*>, <TOTAL>, the access code “93924” and <ENTER>. 2. When “Reset Countdown” appears on the display, press and hold the <TOTAL> button. 3. Press <ENTER> to start the countdown. At zero, the totalizer is reset. -
Page 22: Function Selections
Chapter 3 Operation Series 780-CT Instruction Manual FUNCTION Selections F1 Function Key Pressing the <F1> key initiates the “CE RTD Test.” See Chapter 4, “Input Accuracy Test,” for more information on running the CE Test. F2 Function Key The F2 key is used to establish flow meter bias factors. See Chapter 4 for more information on entering bias factors. -
Page 23: Alarm Acknowledge
Series 780-CT Instruction Manual Chapter 3 Operation Alarm Acknowledge There are four alarms on the Collector-Box: Sensor Fault, Low Flow, High Flow and Totalizer. Alarm logic is the same for all alarms. To prevent nuisance alarms, an alarm condition must be continuously present for at least five seconds before the corre- sponding alarm activates the relay and lights the front panel LED. -
Page 24: Operating The Flow Monitoring System
Chapter 3 Operation Series 780-CT Instruction Manual Operating the Flow Monitoring System First Time Start Up Before turning on the power for the first time, double check all wir- ing connections. During normal operation, the Collector-Box can be turned On or Off with flow present without damaging the flow meter. To begin system operation: 1. -
Page 25: System Configuration
<NO> to enter a new value. The flow body area is the cross-sectional area of the flow in which the Sierra probe is installed. Press <CHANGE UNITS> to toggle the displayed value between square inches and square centimeters. - Page 26 Chapter 3 Operation Series 780-CT Instruction Manual Reference Temperature The Reference Temperature is the temperature used to compute gas density and mass flow at a given reference temperature. Its value af- fects computed mass flow and “Standard” or “Normal” velocity. (Pressure is always referenced to one standard atmosphere).
- Page 27 Series 780-CT Instruction Manual Chapter 3 Operation Self Clean The Self Clean feature heats the flow meter sensor to a high tem- perature, popping or burning off any particulate build-up. During the Self Clean function, the temperature sensor heats to 426° C for a period of up to five minutes.
- Page 28 Chapter 3 Operation Series 780-CT Instruction Manual Tot Switch The Totalizer Switch screen sets the flow rate at which the totalizer switches between normal and premium levels of flow. Press <YES> to accept the displayed value or <NO> to enter a new value. Recommended Value: Customer determined.
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Page 29: Access Code Information
Series 780-CT Instruction Manual Chapter 3 Operation Totalizer Alarm #2 The Totalizer Alarm #2 screen sets the value at which the Totalizer #2 alarm relay circuit activates. To accept the displayed value press <YES>, to enter a new value press <NO>. Press <CHANGE UNITS>... - Page 30 Chapter 3 Operation Series 780-CT Instruction Manual 3-12...
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Page 31: Chapter 4 Validation And Maintenance Procedures
Series 780-CT Instruction Manual Chapter 4 Validation & Maintenance Chapter 4 Validation and Maintenance Procedures This chapter describes the Field Validation procedures designed to validate each component of the Flow Monitoring System. Compo- nent maintenance and repair information are found at the end of this Warning! chapter. -
Page 32: Electronic Test Procedures
Chapter 4 Validation & Maintenance Series 780-CT Instruction Manual Electronic Test Procedures The system electronics are tested in three parts: • Input Accuracy Test • Output Accuracy Test • Totalizer Test Input Accuracy Test 1. Hold down the <F1> key on the Collector-Box front panel for ten seconds to initiate the Calibration Error (CE) test. - Page 33 Series 780-CT Instruction Manual Chapter 4 Validation & Maintenance Output Accuracy Test Use the wiring diagram in Appendix A for assistance in making connections. To perform the Output Accuracy Test: 1. Turn off power at the Collector-Box. 2. Connect an ammeter in series with the 4-20 mA output loop. 3.
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Page 34: Entering Bias Factors
Entering Bias Factors If your Series 780-CT system is being evaluated and compared to a standard calibration device and if the flow curve of the Sierra system Caution! differs from that of the calibration standard, you can use the Collec- Only qualified tor-Box’s K-factor option (see Chapter 3) to make simple span ad-... -
Page 35: Bias Factor Procedure
<ENTER>. (Reference value is the value indicated by the calibration device.) 6. When you are prompted for Sierra No 1, type the lowest Sierra value and press <ENTER>. 7. Repeat steps 5 and 6 to add as many bias factors as you want to include in the system configuration. -
Page 36: Maintenance Procedures
Flow Meter Calibration All flow meter To maintain NIST-traceable calibration standards, we recommend a maintenance operations yearly validation check and recalibration if needed. Sierra Instru- must be performed with the power OFF unless ments maintains a fully equipped, quality controlled Flow Calibra- otherwise instructed. -
Page 37: Obtaining An Rma
Before returning any component of the flow monitoring system to the factory, you must obtain a Return Material Authorization (RMA) form from Sierra Instruments Customer Service. Have your model number and serial number available when you call. To reach Cus-... - Page 38 Chapter 4 Validation & Maintenance Series 780-CT Instruction Manual...
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Page 39: Chapter 5 Troubleshooting
If the connection between the Digi-bridge board and the Collector- Box is faulty, the display will read “RS 485 Fault.” Diagnostic Routine After pressing <DIAG.>, you will see the message: “SIERRA Col- lector-Box” moving across the screen. Then a series of self-check screens will appear. The first screen gives the version of the software. -
Page 40: Troubleshooting Procedures
Chapter 5 Troubleshooting Series 780-CT Instruction Manual Troubleshooting Procedures After running the system diagnostic routine, begin hardware trou- bleshooting by verifying the following facilities issues are correct. These areas impact system operations and must be corrected prior to performing any board level inspections. Warning! To avoid potential electric shock, follow National... - Page 41 Series 780-CT Instruction Manual Chapter 5 Troubleshooting Problem Possible Cause Solution Velocity measurement Flow meter installed with Follow installation is erratic or fluctuating less than required minimum requirements shown in pipe diameters upstream and Chapter 2 downstream Sensor probe not mounted Probe must be mounted securely securely without vibration...
- Page 42 Chapter 5 Troubleshooting Series 780-CT Instruction Manual Problem Possible Cause Solution Collector-Box reading Flow meter is out of Return to factory for will not zero calibration calibration Sensor wires loose or not Verify all sensor wires are terminated properly properly terminated, see Chapter 2 Sensor is damaged Return to factory for...
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Page 43: Appendix A Product Specifications
Series 780-CT Instruction Manual Appendix A Specifications Appendix A Product Specifications Collector Box INPUT POWER 115 VAC (±10%), 50/60 Hz, 10 W or 230 VAC (+10%), 50/60 Hz, 10 W optional. OUTPUT SIGNAL Two standard analog output signals linearly proportional to mass flow rate or velocity;... - Page 44 Appendix A Specifications Series 780-CT Instruction Manual MASS FLOW RATE of Series 780 Mass Flow Meters: AIR FLOW RANGES Pipe Minimum Maximum Size scfm /hr) scfm /hr) 1/4-inch 0–0.5 (0–0.7) 0–9 (0–14) 1/2-inch 0–2 (0–3.0) 0–40 (0–60) 3/4-inch 0–4 (0–5.9) 0–75 (0–120) 1-inch...
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Page 45: Collector-Box Critical Component Locations
Series 780-CT Instruction Manual Appendix A Specifications Figure A-1. Collector-Box Critical Component Locations... -
Page 46: Collector-Box Standard Wiring
Appendix A Specifications Series 780-CT Instruction Manual Figure A-2. Collector-Box Standard Wiring Figure A-3. Collector-Box Optional Rack Mount Wiring... -
Page 47: Digi-Bridge Board Critical Component Locations
Series 780-CT Instruction Manual Appendix A Specifications Figure A-4. Digi-Bridge Board Critical Component Locations... - Page 48 Appendix A Specifications Series 780-CT Instruction Manual...
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