Proprietary Notice The information contained in this publication is derived in part from proprietary and patent data. This information has been prepared for the expressed purpose of assisting operating and maintenance personnel in the efficient use of the instrument described herein. Publication of this information does not convey any rights to use or reproduce it or to use for any purpose other than in connection with the installation, operation and maintenance of the equipment described herein.
SP3850 Flow Computer CONTENTS 1. DESCRIPTION 1.1 Unit Description .................................................................................................... 1 1.2 Unit Features ........................................................................................................ 1 1.3 Specifications ........................................................................................................ 2 2. INSTALLATION 2.1 General Mounting Hints ................................................
SP3850 Flow Computer CONTENTS 7. PRINCIPLE OF OPERATION 7.1 General ............................................................................................................... 41 7.2 Flow Equations ................................................................................................... 41 7.3 Calculating the Expansion Factor ....................................................................... 44 7.4 Computation of Viscosity Coef. A and B ...................................................
SP3850 Flow Computer Unit Description 1. Description 1.1 Unit Description: The SP3850 Flow Computer satisfies the instrument requirements for turbine and other pulse producing flowmeters in liquid and gas applications. Multiple flow equations and instrument functions are available in a single unit with many advanced features. The alphanumeric display shows measured and calculated parameters in easy to understand format.
SP3850 Flow Computer 1.3 Specifications: Specifications: Environmental Indoor Use Altitude up to 2000m Operating Temperature: 0°C to +50°C (-20°C to 55°C optional) Storage Temperature: -40°C to +85 C Maximum Relative Humidity : 80% for temperatures up to 31°C decreasing linearly to 50% RH at 40°C Mains supply voltage fluctuations not to exceed ±10% of the nominal voltage Transient overvoltage according to INSTALLATION CATEGORY II (see UL 3101-1 Annex J) POLLUTION DEGREE 2 in accordance with IEC 664 (see 3.
SP3850 Flow Computer Serial Communication The serial port can be used for printing, datalogging, modem connection and communication with a computer.
SP3850 Flow Computer Setup Mode The setup mode is password protected by means of numeric operator and supervisor lock out codes established by the user. In addition, a secret, manufacturers numeric unlock entry sequence is available. Maintenance Mode: The Maintenance Mode of the SP3850 is the Test and Calibration Mode for the device. This mode provides a number of specialized utilities required for factory calibration, instrument checkout on startup, and periodic calibration documentation.
SP3850 Flow Computer Operation of Serial Communication Port with Printers SP3850’s RS-232 channel supports a number of operating modes. One of these modes is intended to support operation with a printer in metering applications requiring transaction printing, data logging and/or printing of calibration and maintenance reports. For transaction printing, the user defines the items to be included in the printed document.
SP3850 Flow Computer 2. Installation 2. Installation General Mounting Hints 2.1 General Mounting Hints: The SP3850 Flow Computer should be located in an area with a clean, dry atmosphere which is relatively free of shock and vibration. The unit is installed in a 5.43" (138mm) wide by 2.68" (68mm) high panel cutout. (see Mounting Dimensions) To mount the Flow Computer, proceed as follows: Mounting Procedure a. Prepare the panel opening. b.
SP3850 Flow Computer 3. Applications Liquid Volume 3.1 Liquid Volume Measurements: A flowmeter measures the actual volume in a liquid line. A temperature sensor can also be installed to correct for liquid thermal expansion (see 3.2 Corrected Volume). Calculations: • Volume flow is calculated using the flowmeter frequency output and the user entered K-Factor.
SP3850 Flow Computer Corrected Liquid Volume 3.2 Corrected Liquid Volume Measurements: A flowmeter measures the actual volume in a liquid line. A temperature sensor is installed to correct for liquid thermal expansion. Calculations: • Corrected Volume at a base or reference condition is calculated using the flow and temperature inputs as well as the thermal expansion coefficient stored in the flow computer.
SP3850 Flow Computer Liquid Mass 3.3 Liquid Mass Measurements: Actual volume is measured by the flow element. Temperature is measured by the temperature transmitter. A density transmitter can be used for direct density measurements or a pressure transmitter may be utilized.
SP3850 Flow Computer Batching 3.4 Batching Measurements: A flowmeter measures the actual volume in a liquid line. A temperature sensor can also be installed to correct for liquid thermal expansion (see 3.2 Corrected Volume). Calculations: • Volume flow is calculated using the flowmeter frequency output and the user entered K-Factor. • Corrected Volume is calculated using the flow and temperature inputs as well as the thermal expansion coefficient stored in the flow computer.
SP3850 Flow Computer CORRECTED GAS VOLUME 3.5 Corrected Gas Volume Measurements: A flowmeter measures the actual volume flow in a gas line. Temperature and pressure sensors are installed to measure temperature and pressure. Calculations: • Corrected Volume is calculated using the flow, temperature and pressure inputs as well as the gas characteristics stored in the flow computer (see "FLUID DATA" submenu).
SP3850 Flow Computer GAS MASS 3.6 Gas Mass Measurements: A flowmeter measures the actual volume flow in a gas line. Temperature and pressure sensors are installed to measure temperature and pressure. Calculations: • Density and mass flow are calculated using gas characteristics stored in the flow computer.
SP3850 Flow Computer 4 WIRING 4.
SP3850 Flow Computer 4.
SP3850 Flow Computer 5. UNIT OPERATION 5.1 Front Panel Operation Concept for Run Mode The SP3850 is fully programmable through the front panel. Please review the following usage summary before attempting to use the instrument. START STOP TOTAL 1 RATE 2 PRE 1 3 F1 4 PRINT 5 GRAND 6 SCROLL 7 PRE 2 8 F2 9 F3 0 – CLEAR MENU HELP • ENTER How To Use On-Line Help HELP On-line help is provided to assist the operator in using this product.
SP3850 Flow Computer General Operation 5.2 General Operation The unit can display: Rate, Total, Grand Total, Temperature, Pressure, Density, Presets and Time of Day. In addition, input frequencies, computed K-factors and viscosities can be observed. The Temperature and Pressure or Density can be displayed even if you are using the Volumetric Flow Equation (a Temperature or Density sensor must be installed).
SP3850 Flow Computer RS-232 Serial Port (Rate/Total mode) 5.3.5 RS-232 Serial Port Operation in Rate/Total mode The RS-232 serial port can be used for programming (using the Setup Disk) or for communicating to printers and computers in the Operating Mode (Run Mode). PC Communications: The Setup Disk also allows the user to query the unit for operating status such as Flow Rate, Flow Total, Temperature, Pressure, Density, Presets, etc.
SP3850 Flow Computer 5.4 Batcher Operation The Batcher mode is used primarily to control batches. The main difference between the Batch mode and Rate/Total mode is the relay operation. The Batch mode allows the operator to "START" the unit via the front panel or remote input. Once started, the relays (RLY1 & RLY2) will energize and send power to a flow control device (i.e. solenoid valve or pump). The flow sensor will send a signal to the unit and total accumulation will begin.
SP3850 Flow Computer Slow Start Quantity The Slow Start Quantity is a function that allows an amount to be entered for a Slow Start up. This function requires two stage valve control. RLY 1 (slow flow) will energize for Slow Start and RLY 2 (fast flow) will energize after the Slow Start Quantity has been delivered. This helps reduce turbulence when filling an empty container. START, RESET/START and STOP, STOP/RESET When configuring the control inputs, Control Input1 can be set for START or RESET/START.
SP3850 Flow Computer RS-232 Serial Port (Batch mode) 5.4.6 RS-232 Serial Port Operation in Batcher mode The RS-232 serial port can be used for programming (using the Setup Disk) or for communicating to printers and computers in the Operating Mode (Run Mode). PC Communications: The Setup Disk also allows the user to query the unit for operating status such as Flow Rate, Flow Total, Temperature, Pressure, Density, Presets, etc.
SP3850 Flow Computer 6. PROGRAMMING 6.1 Front Panel Operation Concept for Program Mode The SP3850 is fully programmable through the front panel. Please review the following usage summary before attempting to use the instrument. START STOP TOTAL 1 RATE 2 PRE 1 3 F1 4 GRAND 6 SCROLL 7 PRE 2 8 F2 9 PRINT 5 F3 0 – CLEAR MENU HELP • ENTER Setup Mode: How To Make Mode Changes MODE CHANGES Pressing the MENU key will offer selections of RUN, SETUP, TEST.
SP3850 Flow Computer 6.2 Setup Menus Menus 6.2.1 Top Level Setup Menu Display Notes SELECT OPERATE STATE Run Setup Test MENU START Select Setup to enter the instrument setup routine. ENTER INSTRUMENT TYPE Refer to Page 23 for Details. STOP START 6.2.2 Submenu Groups SELECT FLOW EQUATION Refer to Pages 24 for Details. STOP START SETUP INDICATORS Refer to Page 24-26 for Details. STOP START SETUP FLOW INPUT Refer to Page 27-28 for Details.
SP3850 Flow Computer 6.3 Setup Sub-Menus Sub-menus 6.3.1 INSTRUMENT TYPE Notes Press ENTER to enter Instrument Type submenus. INSTRUMENT TYPE ENTER Rate/Tot Press ENTER when Rate/Total is flashing to INSTRUMENT TYPE Rate/Tot Batch configure the instrument as a Ratemeter/ Totalizer. STOP ENTER START If Rate/Tot selected, advance to Select Flow Advance To SELECT FLOW EQUATION Equation. Press ENTER to enter Instrument Type submenus.
SP3850 Flow Computer Sub-menus 6.3.2 SELECT FLOW EQUATION Display Notes SELECT FLOW EQUATION Press ENTER to enter Select Flow Equation submenus. ENTER SELECT FLUID MEDIA Liquid Gas Press ENTER when desired fluid media is flashing. ENTER SELECT FLOW EQUATION Volume Mass Cor/Vol Press ENTER when desired flow equation is flashing. ENTER Advance To SETUP INDICATORS (Total) 6.3.
SP3850 Flow Computer Sub-menus 6.3.5 SETUP INDICATORS (Rate) Display Notes SETUP INDICATORS Tot Dns Rte Tmp Pres Press ENTER when Rate is flashing to configure the Ratemeter Indicators ENTER RATE TIME BASE Sec Min Hour Select the desired Rate Time Base. Day ENTER RATE DESCRIPTOR RATE Enter the desired Descriptor for the Ratemeter. ENTER RATE DEC PLACES(0-3) Select the desired Rate Decimal Place. 2 0-3 decimal places allowed. ENTER RATE AVG FILTER Enter desired Rate Averaging Filter.
SP3850 Flow Computer Sub-menus 6.3.7 SETUP INDICATORS (Pressure) Display Notes SETUP INDICATORS Tot Dns Rte Tmp Pres Press ENTER when Pres is flashing to configure the Pressure Indicators. ENTER PRES UNITS Absolute Enter the Pressure Units Referenced. Gauge ENTER PRESSURE DESCRIPTOR Enter the desired Pressure Descriptor using PRESS the up/down arrow keys. ENTER PRESSURE UNITS psia Enter the desired Pressure Units using the up/ down arrow keys.
SP3850 Flow Computer Submenus 6.3.8 SETUP FLOW INPUT Display Notes Press ENTER to begin setup of Flow Input. SETUP FLOW INPUT ENTER Select the desired Excitation Voltage. EXCITATION VOLTAGE 5v 12v 24v ENTER NOTE: ChA = Single Pulse A=B = Pulse Security Qx1 = Quadrature U/D = Up/Down Control Line Enter the desired Pulse type. See side note. PULSE INPUT TYPE ChA A=B Qx1 U/D ENTER Select the desired Input Pulse Trigger Level. PULSE TRIGGER LEVEL 10mV 100mV 2.
SP3850 Flow Computer Display LINEAR TABLE KA RoA01:######## ENTER LINEAR TABLE KA StA01:####### ENTER Through 40 Points 6.3.8 SETUP FLOW INPUT (continued) Through 40 Points Sub-menus LINEAR TABLE KB RoB01:######## ENTER LINEAR TABLE KB StB01:####### Notes If StRo selected, Enter the desired St/ Ro pair (in ascending order) for each point in the Linearization Table. (channel A) NOTE: Enter 0 for Ro value of any point (other than RoA01) to exit the routine and use the values entered up to that point.
SP3850 Flow Computer Sub-menus 6.3.9 SETUP AUX1 INPUT Display Notes Press ENTER to begin setup of the Auxiliary 1 Input. SETUP AUX1 INPUT ENTER Select Temperature to set the Auxiliary 1 Input AUX1 INPUT TYPE None Temp for Temperature inputs. ENTER Choose Temperature Signal Type. (If RTD selected, AUX2 will not be available for Density or Pressure) AUX1 SIGNAL TYPE Therm Current RTD ENTER INPUT SIGNAL 4-20mA If Current selected, RANGE 0-20mA Choose desired Current Range. Skip if Thermistor or RTD.
SP3850 Flow Computer Sub-menus 6.3.10 SETUP AUX 2 INPUT Display Notes SETUP AUX2 INPUT Press ENTER to begin setup of the Auxiliary Input 2. ENTER NOTE: When Density (Dens) is selected, The menu prompts will be very similar to thePressure prompts. The menus will prompt the user for density values and density units. AUX 2 INPUT TYPE None Dens Press Select Pressure to set the Auxiliary Input 2 for Pressure inputs. ENTER AUX 2 SIGNAL TYPE Voltage Current Choose Pressure Signal Type.
SP3850 Flow Computer Sub-menus 6.3.11 SET FLUID PROPERTIES Display Notes SET FLUID PROPERTIES Press ENTER at this prompt to Set Fluid Properties. ENTER NOTE: Fluid Selections: 0 Water 1 Argon 2 Carbon Dioxide 3 Nitrogen 4 Oxygen 5 MIL-C-7024D 6 Propane 7 50/50 Ethylene 8 Air 9 Diesel FLUID NUMBER (0-9) Up to 10 Fluid types may be stored in the unit. 0 Select the number of the desired fluid to edit. See side note for available fluids.
SP3850 Flow Computer Sub-menus 6.3.12 SETUP PULSE OUTPUT Display Notes SETUP PULSE OUTPUT Press ENTER at this prompt to setup the Pulse Output. ENTER PULSE OUTPUT USAGE Off Vol CVol/Mass Select the desired Pulse Output Usage. ENTER PULSE WIDTH 10mS 100mS Select the desired Pulse Width for the Pulse Output. ENTER PULSE VALUE ####### gal/P Enter the desired Pulse Value for the Pulse Output (Units per Pulse). ENTER Advance To SETUP ANALOG OUTPUT 6.3.
SP3850 Flow Computer Sub-menus 6.3.14 SETUP RELAYS (Relay 1 & Relay 2) Display Notes SETUP RELAYS Rly1 Rly2 Rly3 Rly4 Select the desired Relay for setup. (Relays 3 & 4 Optional) ENTER NOTE: In Batch mode, Relay 1 is reserved for Preset, Relay 2 is reserved for Prewarn. RELAY 1 USAGE RATE TOTAL If Relay 1 or Relay 2 Selected, Select Rate, Total or NA.
SP3850 Flow Computer Sub-menus 6.3.14 (Continued) SETUP RELAYS (Relay 3 & Relay 4) Display Notes SETUP RELAYS Rly1 Rly2 Rly3 Rly4 Select the desired Relay for setup. (Relays 3 & 4 Optional) ENTER NOTE: Settings for Relays 3 & 4 may be entered even if relays are not supplied. The settings will still trigger display alarms. RELAY 3 USAGE Rate Tot Aux Ovr NA RELAY 4 USAGE Rate Tot Aux Alrm NA If Relay 3 Selected, Choose Rate, Total, Aux, Ovr or NA.
SP3850 Flow Computer Sub-menus 6.3.15 SETUP CONTROL INPUTS (RATE/TOTAL) Display Notes SETUP CONTROL INPUTS Press Enter to begin setup of the Control Inputs. ENTER SETUP CONTROL INPUTS Input1 Input2 Input3 Select the desired Control Input for setup. ENTER CONTROL INPUT1 USAGE INHIBIT_TOTAL NA If Control Input 1 Selected, Select Inhibit Total or NA (Not Assigned). CONTROL INPUT2 USAGE RESET_TOTAL NA If Control Input 2 Selected, Select Reset Total or NA (Not Assigned).
SP3850 Flow Computer Sub-menus 6.3.17 SETUP REALTIME CLOCK (Time) Display Notes SETUP REALTIME CLOCK Press Enter to begin setup of the Realtime Clock. ENTER SETUP REALTIME CLOCK Time Date Select Time to set the time. ENTER CLOCK TYPE 24HR Select 24Hr or 12Hr clock 12HR ENTER SELECT CLOCK AM/PM AM PM If 12Hr Clock, Enter AM or PM ENTER TIME OF DAY HH:MM:SS ##:##:## Enter time of day. ENTER Advance To SETUP REALTIME CLOCK (Date) 6.3.
SP3850 Flow Computer Sub-menus 6.3.19 SERIAL USAGE (RS-232/485) Display Notes SERIAL USAGE Press Enter to begin setup of the Serial Port. ENTER SERIAL HARDWARE RS232 RS485 ENTER DEVICE ID Select Serial Hardware type for standard port. Select RS485 only on special order. (See SETUP NETWORK CARD for RS485 Modbus option) Select the Device ID. ## ENTER BAUD RATE 300 600 1200 Select the desired Baud Rate.
SP3850 Flow Computer Sub-menus 6.3.20 SERIAL USAGE (Modem Options) (continued) Display Notes Select "Yes" to have the unit perform a Call Out transmission upon error/alarm condition. CALL ON ERROR/ALARM No Yes ENTER 0 Call Out Phone Number to be dialed for "Call Out Time" or "Print On Error/Alarm". (Up to 20 digits with "." used to pause between digits) 0 Enter the number of redials to be performed on call out time if busy or no answer (error/ alarm tries until connected).
SP3850 Flow Computer Sub-menus 6.3.22 SETUP DATALOG/PRINT (Select_list) STOP START List Items: FLUID TIME RATE TOTAL GRAND TEMP DENS PRE1 PRE2 PRESS VISC FREQ1 FREQ2 KA-F KB-F Display Notes SET DATALOG/PRINT Press enter to begin Setup Datalog/Print routine. ENTER SET DATALOG/PRINT Config Select_list Press enter when Select_list is selected to setup print list. PRINT LIST ITEMS FLUID YES Use Up and Down arrow keys to view list status.
SP3850 Flow Computer 6.3.24 SETUP NETWORK CARD (optional) SETUP NETWORK CARD Press Enter to setup Network Card ENTER SELECT NTW PROTOCOL ModbusRTU Select desired Network Protocol. ENTER NETWORK DEVICE ID 1 Enter the device address on network (00255). ENTER BAUD RATE 2400 4800 9600 19200 Select the desired Baud Rate. ENTER PARITY None Select the desired Parity.
SP3850 Flow Computer 7. Principle Of Operation General Operation 7.1 General: The SP3850 Flow Computer uses several internal calculations to compute the compensated flow based on specific data input. Several computations are performed to arrive at the uncompensated flow, temperature, pressure, density and viscosity. This information is then used to compute the Corrected Volume Flow or Mass Flow.
SP3850 Flow Computer 7.2 Flow Equations: (Continued) Fluid Equations Viscosity Computation: Liquid Case B A exp (Deg F + 459.67) † centistokes = Absolute Density ( ) Where: centistokes = cP/(kg/l) Gas Case cP viscosity = A • (Tf + 459.
SP3850 Flow Computer 7.2 Flow Equations: (Continued) Flow Equations The above information was obtained from "Flow Measurement Engineering Handbook, 3rd Edition" by Richard W Miller. API 2540 Expansion Factor Equation 1. Select the values for K0 and K1 for the fluid group to be measured 2. Convert the base reference density for your fluid into the corresponding density units of kg/m3 3. Solve for αb using equation above 4.
SP3850 Flow Computer 7.3 Calculating the Fluid Expansion Factor Calculating Expansion Factor The liquid density is a function of the flowing temperature for many fluids. This unit solves an equation which represents this physical property of the fluid. The information which the unit uses to describe the fluid is entered by the user in the following variables: Reference Temperature, Reference Density, Fluid Expansion Factor.
SP3850 Flow Computer 7.4 Computation of Viscosity Coef. A and B Computation of Viscosity Coef. A & B The flow computer solves an equation which computes the viscosity as a function of temperature. Two parameters must be entered for this calculation to be performed. These are the setup parameters Viscosity Coef. A and Viscosity Coef. B. A table listing these values for common fluids is available in Appendix A. Alternately, if your intended fluid is not listed, the Viscosity Coef.
SP3850 Flow Computer 7.5 Linearization Table Linearization Table General Information 7.5.1 Linearization Table General Information The Linearization Table is used when the flow input device gives a nonlinear input signal. The unit uses up to 40 different points, as entered by the operator, to form a curve for linearizing the input signal. Notes: 1) A minimum of three points must be set up.
SP3850 Flow Computer 8. Test, Service and Maintenance 8.1 Test Menus Menus Display 8.1.1 TOP LEVEL TEST MENUS Notes Select Test to enter the instrument test & calibration routine. SELECT OPERATE STATE Run Setup Test NOTE: Supervisor (Service) password required to gain access to this mode. ENTER START Refer to Page 48 for Details. Audit Trail STOP START Refer to Page 48 for Details. Error history STOP START Refer to Page 48 for Details. Print System Setup STOP START Refer to Page 49 Details.
SP3850 Flow Computer 8.2 Test Sub-Menus Sub-menus 8.2.1 Audit Trail Submenu Group Display Notes Press Enter to view the audit trail information. Audit Trail ENTER Config_Audit nnnnn hh:mm:ss mm/dd/yy The configuration audit trail format: nnnnn= number of critical menu changes, hh:mm:ss; mm/dd/yy = time and date of last change. MENU Cal_Audit hh:mm:ss nnnnn mm/dd/yy MENU 8.2.2 Error History Submenu Group Audit Trail Press Menu to get back to audit trail top-level menu.
SP3850 Flow Computer Sub-menus 8.2.4 Keypad test Submenu Group Display Notes Keypad test Press Enter to enter keypad test ENTER Keypad test Key pressed—> ENT Press the various keys and the display will show the key that was pressed. Press Menu to exit the test MENU 8.2.5 Display test Submenu Group Keypad test Press Menu to get back to Keypad test toplevel menu. Display test Press Enter to enter display test.
SP3850 Flow Computer ALL UNITS ARE CALIBRATED AT THE FACTORY PRIOR TO SHIPMENT CAUTION: This unit must be calibrated using precision and calibrated equipment. Equipment needed is as follows: Frequency Generator, Digital Multimeter, Precision Current/Voltage Source, Oscilloscope, Frequency Counter. Sub-menus Display Notes Calibrate Press Enter to begin the calibration routine. Calibration Submenu Group (Please note the caution above) ENTER 8.2.
SP3850 Flow Computer Sub-menus Display Notes 8.2.8 Calibrate Aux2: 0mA Submenu Group Calibrate Aux2: 0mA Iin=TB1-8 GND=TB1-4 To Calibrate: Connect Current Source (+) TB1-8, (-) TB1-4. Input 0mA and press Enter. ENTER Calibrate Aux2: 0mA 0 CALIBRATING —— This message is displayed during calibration. Calibrate Aux2: 0mA *** DONE *** This message is displayed when the 0mA calibration is finished.
SP3850 Flow Computer 8.2.10 Cal Therm: 100 Ohms Submenu Group Cal Therm: 100 Ohms Therm TB1-6 to TB1-4 ENTER To Calibrate: Place a 100 ohm 0.1% resistor between TB1-6 and TB1-4. Press enter to calibrate. Cal Therm: 100 Ohms 0 CALIBRATING —— This message is displayed during calibration. Cal Therm: 100 Ohms *** DONE *** This message is displayed when the calibration is finished. Cal Therm: 100 Ohms Therm TB1-6 to TB1-4 The display will automatically return to the Cal Therm: 100 Ohms top-level menu.
SP3850 Flow Computer Sub-menus 8.2.12 Calibrate Aux2: 0V Submenu Group Display Notes Calibrate Aux2: 0V Vin=TB1-5 GND=TB1-4 To Calibrate: Connect Voltage Source (+) TB1-5, (-) TB1-4. Input 0V and press Enter. ENTER Calibrate Aux2: 0V 0 CALIBRATING —— This message is displayed during calibration. Calibrate Aux2: *** DONE *** This message is displayed when the 0V calibration is finished. 0V Calibrate Aux2: 0V Iin=TB1-5 GND=TB1-4 STOP 8.2.
SP3850 Flow Computer Sub-menus 8.2.15 Calibrate 0mA Aout Submenu Group Display Calibrate + TB1-15 Notes 0mA Aout Connect ammeter to (+) TB1-15, (-) TB1-16. - TB1-16 Press enter. ENTER To trim 0mA analog output: Press CLEAR to Calibrate 0mA Aout enable editing and enter a small negative Enter mA: 0.00000 number (i.e. -0.100) to force a display reading, then clear and enter small quantity measured ENTER on your meter. Calibrate 0mA Aout The display will return to Calibrate 0mA out.
SP3850 Flow Computer Sub-menus 8.2.18 Pulse input test Submenu Group Display Notes Pulse input test Press Enter key to test the pulse input. ENTER 2.5V 10mV 100mV START STOP Pulse input test Trigger level 2.5V Use the Up/Down arrow keys to select the appropriate trigger level. ENTER 40Hz 3KHz 20kHz START STOP Pulse input test count speed 3kHz ENTER Pulse input test F1: 0 F2: 0 MENU 8.2.
SP3850 Flow Computer Sub-menus 8.2.21 Pulse out test Submenu Group Display Notes Press Enter key to test the pulse output. Pulse out test ENTER Pulse out test *0Hz 1Hz 10Hz 20Hz MENU 8.2.22 Relay test Submenu Group Pulse out test Press Menu key to return to Pulse out test top-level menu. Relay Test Press Enter to test the relays. ENTER Rly1 Rly2 Rly3 Rly4 Off Off Off Off MENU 8.2.
SP3850 Flow Computer Sub-menus 8.2.24 Battery Voltage test Submenu Group Display Notes Battery Voltage Test Press Enter key to view the battery voltage. ENTER Battery Voltage Test 3.312 Volts The display will show the battery voltage. Replace battery at 2.5 VDC or below. MENU 8.2.25 Data logger utility Submenu Group Battery Voltage Test Press Menu key to return to battery voltage test top-level menu. Data logger utility Press Enter to use data logger utility.
SP3850 Flow Computer 8.3 Internal Fuse Replacement Instructions: 1. Make sure you follow proper E.S.D. Precautions. All persons performing this replacement must follow proper grounding procedures. 2. Turn the power to the unit off. 3. Disconnect the two piece connector rear terminal block, leaving all connections in place. 4. Remove the unit from the panel. 5. Remove the four machine screws (see fig. 1) which hold the two sections of the case together. 6.
SP3850 Flow Computer 9. RS-232 Serial Port 9.1 RS-232 Port Description: The SP3850 has a general purpose RS-232 Port which may be used for any one of the following purposes: Transaction Printing Data Logging Remote Metering by Modem (optional) Computer Communication Link Configuration by Computer Print System Setup Print Calibration/Malfunction History 9.
SP3850 Flow Computer 10. RS-485 Serial Port (optional) 10.1 RS-485 Port Description: The SP3850 has a an optional general purpose RS-485 Port which may be used for any one of the following purposes: Accessing Process Parameters Rate, Temperatures, Density, Pressure, Viscosity, Setpoints, Month, Day, Year, Hour, Minutes, Seconds, etc.
SP3850 Flow Computer 11. Flow Computer Setup Software The SP3850 setup program provides for configuring, monitoring and controlling a SP3850 unit over the RS-232 link. Sample applications are stored in disk files. The setup program calls these Templates. You can store the setup from the program’s memory to either the SP3850 (Downloading the file) or to a disk file (Saving the file) for later usage.
SP3850 Flow Computer 11.4 Using the Flow Computer Setup Software The setup software window consists of several menu “Tabs”. Each tab is organized into groups containing various configuration and/or monitoring functions. To view the tab windows, simply click on the tab. The previous tab window will be hidden as the new tab window is brought to the foreground. 11.5 File Tab The File Tab has three sections. Any of the options on this tab can also be accessed from the File submenu.
SP3850 Flow Computer 11.7 View Tab The View Tab screen allows for viewing selected group items on the PC in a similar format as shown on the unit display. Data from the following groups can be viewed in the List of Values section: Process Parameters (i.e. rate, temperature) Totalizers (i.e. total, grand total) Error Log Software Version The setup software assumes the current setup has been uploaded from the flow computer into the PC.
SP3850 Flow Computer 12. Glossary Of Terms Acknowledge & Clear Alarms Acknowledge is used to clear alarm relays and remove any visual alarm messages from the display. In the run mode, press the ENTER key or activate CONTROL INPUT 3 (if set for ACK) to momentarily clear alarms and alarm messages. Alarms will reassert themselves if alarm conditions are still present. Analog Output The analog signal (4-20mA) that is generated by the SP3850.
SP3850 Flow Computer 12. Glossary Of Terms (Continued) Flow Equation A recognized relationship between the process parameters for flow, temperature, pressure and density used in flow measurements. Flow Signal Timeout The Flow Signal Timeout allows the user to enter a timeout of 0 to 99 seconds. If a batch is “Filling” and zero flow persists for more than the user entered time then the batch will be aborted. This prevents over flows due to faulty flow sensors and/or wiring.
SP3850 Flow Computer 12. Glossary Of Terms (Continued) Mass Flow Mass Flow is inferred by the volumetric flow and density (or implied density) of a fluid. Maximum Batch Preset The Maximum Batch Preset allows the user to program the Maximum Batch value allowed to be entered by the operator. If an operator should try to program a batch higher then this value, the unit will not allow the value to be entered and will prompt the user with an error message saying that the Maximum Batch Preset has been exceeded.
SP3850 Flow Computer 12. Glossary Of Terms (Continued) Quick Update % This feature is used to disable the rate averaging filter when a significant change in the flow rate occurs. The user can enter the percent of change needed to be detected to disable the averaging feature. This is especially useful during start-up and shutdown of flow. Rate Averaging Filter The rate averaging filter is used to stabilize fluctuating rate displays. Higher settings provide more averaging for a more stable display.
SP3850 Flow Computer 13. Diagnosis and Troubleshooting 13.1 Response of SP3850 on Error or Alarm: Error and warning indications which occur during operation are indicated in the RUN mode alternately with the measured values. The SP3850 Flow Computer has three types of error: TYPE OF ERROR DESCRIPTION Sensor/Process Alarms Errors detected due to sensor failure or process alarm conditions Self Test Errors Errors detected during self test.
SP3850 Flow Computer 13.2 Diagnosis Flow Chart and Troubleshooting All instruments undergo various stages of quality control during production. The last of these stages is a complete calibration carried out on state-of-the-art calibration rigs. A summary of possible causes is given below to help you identify faults. Is there an input power supply voltage across Terminals 23 and 24? No Yes Is the Display Backlight Visible? Check the connections according to the circuit diagrams.
SP3850 Flow Computer 13.3 Error & Warning Messages: 13.3.1 Sensor/Process Alarms Error/Warning Message Cause Remedy TOTALIZER ROLLOVER Displayed when totalizer rolls over Acknowledge Rollover, Remedy not required AUX INPUT TOO LOW! 4-20 mA Input current at aux input smaller than 3.
SP3850 Flow Computer 13.3 Error & Warning Messages: (Continued) 13.3.
SP3850 Flow Computer Appendix A Fluid Properties Table LIQUID FLUID REF. DENSITY (lb./gal) REF. TEMP. (ºF) COEFF. OF EXPANSION (e-6 format) LIQ.VISC. ANDREDE’s EQUATION COEFF. “A” VISCOSITY BY ANDREDE’s EQUATION COEFF. “B” AIR AMMONIA ARGON CO2 METHANE NATURAL GAS NITROGEN OXYGEN PROPANE Nx-19 GASOLINE KEROSENE No. 2 FUEL WATER 7.2947 5.6996 11.6172 8.735 3.5404 3.5404 6.7438 9.5208 4.2344 3.5404 6.2572 6.9243 7.8843 8.3389 -317.8 -28.2 -302.6 -10.0 -258.7 -258.7 -320.4 -297.4 60 -258.
BATCH COUNT MODE 73 ASSIGN AUX CHANNEL ANALOG OUT RANGE PULSE VALUE REF.
