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Troubleshooting
Related Manuals for Flowmetrics 926-ST1LE
Summary of Contents for Flowmetrics 926-ST1LE
- Page 1 926-ST1LE omputer 990077 06/16...
- Page 2 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.
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Page 3: Table Of Contents
CONTENTS 1. DESCRIPTION 1.1 Unit Description ..........................1 1.2 Unit Features..........................1 1.3 Specifications ..........................2 2. INSTALLATION 2.1 General Mounting Hints ....................... 6 2.2 Mounting Diagrams ........................6 3. APPLICATIONS 3.1 Liquid Volume..........................7 3.2 Batching ............................8 4. WIRING 4.1 Typical Batcher Wiring ......................... - Page 4 12. GLOSSARY OF TERMS 12 Glossary Of Terms ........................46 13. DIAGNOSIS AND TROUBLESHOOTING 13.1 Response of 926-ST1LE on Error or Alarm: ................50 13.2 Diagnosis Flow Chart and Troubleshooting ................51 13.3 Error & Warning Messages: ..................... 52 13.3.1 Sensor/Process Alarms ..................52 13.3.2 Self Test Alarms ......................
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Page 5: Description
Single key direct access to measurements and display scrolling is supported. The versatility of the 926-ST1LE permits a wide measure of versatility within the instrument package. The various hardware inputs and outputs can be “soft” assigned to meet a variety of common application needs. -
Page 6: Specifications
926-ST1LE Flow Computer 1.3 Specifications: Flow Inputs: Pulse Inputs: Number of Flow Inputs: one Specifications: Configurations supported: single input with or Environmental without quadrature (menu selectable) Indoor Use Input Impedance: 10 KΩ nominal Altitude up to 2000m Pullup Resistance: 10 KΩ to 5 VDC (menu Operating Temperature: 0°C to +50°C... - Page 7 926-ST1LE Flow Computer Relay Outputs Isolated Analog Output The relay outputs are menu assignable to The analog output is menu assignable to correspond (Individually for each relay) Low Rate Alarm, Hi to the Rate or Total. Rate Alarm, Prewarn Alarm, Preset Alarm, General Type: Isolated Current Sourcing purpose warning (security), overrun or not used.
- Page 8 926-ST1LE Flow Computer Operating Mode The setup mode is password protected by means The Flow Computer can be thought of as making of a numeric lock out code established by the user. a measurement of flow and then performing In addition, a secret, manufacturers numeric unlock calculations which are then updated periodically entry sequence is available.
- Page 9 Print Malfunction History telecommunication equipment. Operation of Serial Communication Port with In the modem mode, the 926-ST1LE is assumed to be operating in a remote metering role. In addition, the 926-ST1LE will be capable of initiating a call to a designed telephone number in the event of a...
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Page 10: Installation
2. Installation 2.1 General Mounting Hints: The 926-ST1LE 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. -
Page 11: Applications
926-ST1LE Flow Computer 3. Applications 3.1 Liquid Volume Measurements: A flowmeter measures the actual volume in a liquid line. Calculations: • For Flowmeters with Pulse Outputs, Volume flow is calculated using the flowmeter frequency output and the user entered K-Factor or Linearization Table. -
Page 12: Batching
926-ST1LE Flow Computer 3.2 Batching Measurements: A flowmeter measures the actual volume in a liquid line. Calculations: • For Flowmeters with Pulse Outputs, Volume flow is calculated using the flowmeter frequency output and the user entered K-Factor or Linearization Table. -
Page 13: Wiring
926-ST1LE Flow Computer 4 WIRING 4.1 Typical Batcher Wiring: (+) V DC OUTPUT FLOW Signal PULSE IN 1 PULSE IN 2 Common COMMON NOT USED FLOW METER NOT USED with Pre Amp NOT USED NOT USED Stop Start CNTR IN 1... -
Page 14: Unit Operation
926-ST1LE Flow Computer 5. UNIT OPERATION 5.1 Front Panel Operation Concept for Run Mode The 926-ST1LE is fully programmable through the front panel. Please review the following usage summary TOTAL RATE PRE 1 CLEAR MENU START before attempting to use the instrument. -
Page 15: General Operation
926-ST1LE Flow Computer 5.2 General Operation The unit can display: Rate, Total, Grand Total, Presets and Time of Day. The unit can be programmed to perform Ratemeter/Totalizer or Batching functions. 5.3 Ratemeter/Totalizer Operation The Ratemeter/Totalizer mode is used primarily to monitor flowrate and accumulated total. The relays can be used to trigger on flow rate, total, or alarms. -
Page 16: Rs-232 Serial Port Operation In Rate/Total Mode
IBM compatible PC's. The user reads and writes information from/to the RS-485 using the Modbus RTU commands. The 926-ST1LE then responds to these information and command requests. Process variables and totalizers are read in register pairs in floating point format. Time and date are read as a series of integer register values. -
Page 17: Batcher Operation
926-ST1LE 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. -
Page 18: Password Protection For Batcher Mode
926-ST1LE Flow Computer START, RESET/START and STOP, STOP/RESET When configuring the control inputs, Control Input1 can be set for START or RESET/START. When set for START, the unit will start batching when a signal is applied to Control Input 1 or the front panel Start key is pressed. -
Page 19: Rs-232 Serial Port Operation In Batcher Mode
Man Machine Interface software for IBM compatible PC's. The user reads and writes information from/to the RS-485 using the Modbus RTU commands. The 926-ST1LE then responds to these information and command requests. -
Page 20: Programming
926-ST1LE Flow Computer 6. PROGRAMMING 6.1 Front Panel Operation Concept for Program Mode The 926-ST1LE is fully programmable through the front panel. Please review the following usage summary before attempting to use the instrument. TOTAL RATE PRE 1 CLEAR MENU... -
Page 21: Ez Setup
926-ST1LE Flow Computer 6.2 EZ Setup The EZ Setup routine is a quick and easy way to configure the unit for the most commonly used instrument functions. This setup assumes that you are measuring Volumetric Flow using a high level, DC Pulsing flow sensor. Entering the EZ Setup mode automatically sets many features. This may cause any previously programmed information to be lost or reset. -
Page 22: Setup Menus
926-ST1LE Flow Computer 6.3 Setup Menus Sub-menus Display Notes 6.3.1 Select Setup to enter the instrument setup routine. SELECT OPERATE STATE Top Level Setup Menu Setup Test 6.3.2 Refer to Page 17 for Details. STOP SELECT EZ SETUP START Sub-menu... -
Page 23: Setup Sub-Menus
926-ST1LE Flow Computer 6.4 Setup Sub-Menus Sub-menus Display Notes 6.4.1 Refer to page 17 for EZ Setup routine. SELECT EZ SETUP SELECT EZ SETUP Press the DOWN (stop) key to advance to Instrument STOP Type. Press the UP (start) key to advance to START Administrative Setup. - Page 24 926-ST1LE Flow Computer Sub-menus Notes 6.4.2 Enter the maximum allowable Batch Preset. The operator MAXIMUM BATCH PRESET will not be able to enter a batch preset larger than this INSTRUMENT TYPE 1000.0 gal value. (continued) STOP START STOP START Select ON to set the unit to operate using a Batch See Section 5.4, see also...
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Page 25: Setup Indicators (Total)
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.3 Press ENTER to begin setup of the Indicators SETUP INDICATORS SETUP INDICATORS (Total) Press ENTER when Total is flashing to configure the SETUP INDICATORS Totalizer Indicators Total Rate Enter the desired Total Descriptor text... -
Page 26: Setup Flow Input (Pulse - Cha & Cha=Chb)
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.5 Press ENTER to begin setup of Flow Input. SETUP FLOW INPUT SETUP FLOW INPUT (Pulse - chA & Select the desired Excitation Voltage for your flow sensor. EXCITATION VOLTAGE chA=chB) Caution: Improper selection may cause damage to... -
Page 27: Setup Flow Input (Pulse - Quadrature, Qx1 Or Qx2)
926-ST1LE Flow Computer Sub-menus Display Notes Press ENTER to begin setup of Flow Input. 6.4.6 SETUP FLOW INPUT SETUP FLOW INPUT (Pulse - Quadrature, Select the desired Excitation Voltage. EXCITATION VOLTAGE Qx1 or Qx2) Press ENTER when Pulse is flashing to configure the FLOW INPUT TYPE flow input for Pulse signals. -
Page 28: Setup Pulse Output
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.7 Press ENTER at this prompt to setup the Pulse Output. SETUP PULSE OUTPUT SETUP PULSE OUTPUT Select the desired Pulse Output Usage. PULSE OUTPUT USAGE Volume Select the desired Pulse Width for the Pulse Output. -
Page 29: Setup Relays
926-ST1LE Flow Computer Sub-menus Display Notes Select the desired Relay for setup. 6.4.9 SETUP RELAYS (Relays 3 & 4 Optional, menus will always appear even if SETUP RELAYS Rly1 Rly2 Rly3 Rly4 option not installed) (Relay 1 & Relay 2) - Page 30 926-ST1LE Flow Computer Sub-menus Display Notes Select the desired Relay for setup. 6.4.9 (Continued) SETUP RELAYS (Relays 3 & 4 Optional) SETUP RELAYS Rly3 Rly4 Rly1 Rly2 (Relay 3 & Relay 4) If Instrument Type is set for BATCHER, RELAY 3 USAGE Choose Rate, Total, Alrm, Ovr or NA.
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Page 31: Setup Control Inputs (Rate/Total)
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.10 Press Enter to begin setup of the Control Inputs. SETUP CONTROL INPUTS SETUP CONTROL INPUTS (RATE/TOTAL) Select the desired Control Input for setup. SETUP CONTROL INPUTS Input1 Input2 Input3 If Control Input 1 Selected, CONTROL INPUT1 USAGE Select Inhibit Total or NA (Not Assigned). -
Page 32: Setup Realtime Clock (Time)
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.12 Press Enter to begin setup of the Realtime Clock. SETUP REALTIME CLOCK SETUP REALTIME CLOCK (Time) Select Time to set the time. SETUP REALTIME CLOCK Time Date Select 24Hr or 12Hr clock CLOCK TYPE... -
Page 33: Serial Usage
NUMBER OF REDIALS out time if busy or no answer. (error/alarm tries until connected) Select "Yes" to perform hang-up if there is inactivity for HANGUP IF 2MIN INACT more than 2 minutes for calls initiated by the 926-ST1LE. Advance To SETUP DATALOG/PRINT... - Page 34 926-ST1LE Flow Computer Sub-menus Display Notes 6.4.15 Press Enter to setup the Datalog/Print information. SETUP DATALOG/PRINT SETUP DATALOG/PRINT (Configure) Select Config to configure the Datalog/Print information. SETUP DATALOG/PRINT Config Select_list Select the type of Output Format. OUTPUT FORMAT Printer Term Dbase Enter the desired Page Length.
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Page 35: Set Datalog/Print (Configure)
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.16 Press enter to begin Setup Datalog/Print routine. SET DATALOG/PRINT SETUP DATALOG/PRINT (Select_list) Press enter when Select_list is selected to setup print list. SET DATALOG/PRINT Select_list Config PRINT LIST ITEMS TOTAL Use Up and Down arrow keys to view list status. -
Page 36: Setup Network Card
926-ST1LE Flow Computer Sub-menus Display Notes 6.4.18 Press Enter to setup Network Card. SETUP NETWORK CARD SETUP NETWORK CARD (optional) Select desired Network Protocol. (only Modbus RTU is SELECT NETW PROTOCOL supported) NETWORK DEVICE ID Enter the device address on network (00-247). -
Page 37: Principle Of Operation
Flow Computer 7. Principals Of Operation 7.1 General: The 926-ST1LE Flow Computer uses several internal calculations to compute the input frequency based on specific data input. Several computations are performed to yield flow or linearized flow. 7.2 Flow Equations: Uncompensated Flow Computation: Pulse Input;... -
Page 38: Linearization Table
926-ST1LE Flow Computer 7.3 Linearization Table 7.3.1 Linearization Table General Information The Linearization Table is used when the flow input device gives a nonlinear input signal. The unit uses up to 16 different points, as entered by the operator, to form a curve for linearizing the input signal. -
Page 39: Test, Service And Maintenance
926-ST1LE Flow Computer 8. Test, Service and Maintenance 8.1 Test Menus Sub-menus Display Notes 8.1.1 Select Test to enter the instrument test & calibration routine. TOP LEVEL SELECT OPERATE STATE NOTE: Supervisor (Service) password required to gain Test TEST MENUS Setup access to this mode. -
Page 40: Test Sub-Menus
926-ST1LE Flow Computer 8.2 Test Sub-Menus Sub-menus Display Notes 8.2.1 Press Enter to view the audit trail information. Audit Trail Audit Trail Sub-menu Group The configuration audit trail format: Config_Audit nnnnn nnnnn= number of critical menu changes, hh:mm:ss mm/dd/yy hh:mm:ss; mm/dd/yy = time and date of last change. -
Page 41: Keypad Test
926-ST1LE Flow Computer Sub-menus Display Notes 8.2.4 Press Enter to enter keypad test. Keypad test Keypad test Sub-menu Group Press the various keys and the display will show the key Keypad test that was pressed. Press Menu to exit the test. -
Page 42: Pulse Input Test
926-ST1LE Flow Computer Sub-menus Display Notes 8.2.8 Press Enter key to test the pulse input. Pulse input test Pulse input test Sub-menu Group 2.5V Use the Up/Down arrow keys to select the appropriate Pulse input test STOP 10mV START trigger level. -
Page 43: Excitation Out Test
926-ST1LE Flow Computer 8.2.11 Press Enter key to test the pulse output. Pulse out test Pulse out test To simulate a frequency on the pulse output: Connect a Sub-menu Group frequency counter to (+)TB1-13, (-)TB1-14. Press the key under the desired frequency Pulse out test setting to move the asterisk (*). -
Page 44: Internal Fuse Replacement
926-ST1LE 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. -
Page 45: Rs-232 Serial Port
926-ST1LE Flow Computer 9. RS-232 Serial Port 9.1 RS-232 Port Description: The 926-ST1LE 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... -
Page 46: Rs-485 Serial Port
Flow Computer 10. RS-485 Serial Port (optional) 10.1 RS-485 Port Description: The 926-ST1LE 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, Setpoints, Month, Day, Year, Hour, Minutes, Seconds, etc. -
Page 47: Flow Computer Setup Software
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 926-ST1LE (Downloading the file) or to a disk file (Saving the file) for later usage. Similarly you can load the setup in program memory from either a disk file (Opening a file) or from the 926-ST1LE unit (Uploading a file). -
Page 48: File Tab
3. Print the current template through the PC's printer using Print Setup option. 11.6 Setup Tab The Setup tab is where majority of the 926-ST1LE instrument setup modifications are done. The Setup tab is divided into five sections. System Section:... -
Page 49: View Tab
If communication errors occur while reading data from the 926-ST1LE device, the word ‘Error’ will appear in place of the actual value. If the connection to the 926-ST1LE is lost, the viewer will time out with a message saying the device is not responding. -
Page 50: Glossary Of Terms
926-ST1LE 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 926-ST1LE. It can correspond to the Rate or Total. This output is used primarily for transmission of process information to remote systems. Audit Trail The audit trail is used to track the number of changes made to the units setup program and calibration. Auto Batch Restart The Auto Batch Restart function allows the user to set an amount of time to automatically restart a batch after the completion of a batch. This time can be set from 1 to 99 seconds. Batch Count Mode Batch Count Mode specifies the user preference for count direction. The "Up" selection begins with a value of "0" and counts up until the batch size is reached. The "Down" selection begins with a value equal to the desired batch size and counts down to "0". Batch Overrun The 926-ST1LE offers a batch overrun compensation routine. If batch overrun occurs due to slow valve response time, the unit will compensate for the overrun amount on the next batch. This feature can be disabled if desired. NOTE: A nonzero MAX DRAIN TIME value is also required. Batcher An instrument which controls the dispensing of desired batch amounts. Liquid batching systems are usually comprised of a batch controller (batcher), flowmeter and control valve. The batcher opens and closes the valve through the use of relays and measures the amounts of liquid being dispensed via the flowmeter. - Page 51 926-ST1LE Flow Computer 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. Flow Equation A flow control expression or algorithm describing a mathematical equation to be solved by a flow computer in the desired application. Follow Alarm Alarm relays which are non latching and whose output state is based solely on the comparison of the current process value, the alarm setpoint (trip point) and hysteresis. Function Key A key on a push-button panel or keyboard (whose function is described by the key label) used to perform an instrument function or special routine. Handshake A means of controlling the information flow between two pieces of equipment to prevent the sending device from transmitting information at a rate faster than what can be accepted by the receiver. Hysteresis The relay hysteresis is a "dead band" setting which allows the relay to remain energized for a given amount below the setpoint. This is used to prevent relay chatter when the process value is near the setpoint value. Example: If the Preset is set at 100, and the hysteresis is set at 10, the relay will energize when the rate, temp or dens. reaches 100, the relay will remain energized until the reading falls below 90. Input Termination Input signal lines on digital inputs often require pullup or pulldown resistor configurations to operate properly with different sensor configurations. The 926-ST1LE contains such resistors and may be enabled via the setup menu. Inhibit Totalizer "Inhibit Total" is a Control Input 1 setting that is used to stop the totalization. If enabled, a voltage level on control input 1 will inhibit the total as long as the voltage is present. This feature is useful during meter proving and in applications that provide a sensor to signal the flow computer when liquid is present.
- Page 52 926-ST1LE Flow Computer Low Flow Cutoff A value set at which any flow measurements read below this value will be ignored. Low Pass Filter A low pass filter passes low input frequencies while blocking high frequencies. In the 926-ST1LE, this is the maximum input count speed to be encountered in an application. It is expressed in counts per second (Hz). 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. Maximum Drain Time The unit declares that a batch is “done” when the flow rate equals “0”. A flow rate may be present long after the Preset Relay de-energizes due to slow reacting valves or leaky valves. The Maximum Drain Time allows the user to enter an amount of time (0 to 99 seconds) to wait before declaring “Batch Done”. After the Preset Batch quantity is reached, the unit will declare “Batch Done” when the flow rate is “0” or the Maximum Drain Time has expired. The batch data will then be available for printing and datalogging. NOTE: A nonzero MAX DRAIN TIME value must be entered when using batch overrun compensation. Max Window The max. window time sets the maximum sample time (1 to 99 sec) for the ratemeter. Operator Code An operator password code which authorizes changes to the setup of the instrument but blocks access to the Service/Calibration/Test mode. The operator code also blocks the clearing of the Grand Total. Parity A method for detecting errors in transmissions of serial communications data. Preset A set point used to trigger the relay outputs of the 926-ST1LE. Print Interval The print interval allows the 926-ST1LE to transmit information to the serial port at selectable time intervals.
- Page 53 926-ST1LE Flow Computer 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. Derived from the equation: ((OLD DATA x "Avg. Filter") + NEW DATA) ("Avg. Filter" + 1) Ratemeter Any device used to display the speed of a process. The ratemeter in the 926-ST1LE displays flow rate. Reset/Start Control Input In a batching system, a single operator activation of the START key or Control Input 1 will reset the total then start the batch process. Select Preset Type This menu selection allows the user to choose between Standard Preset or EZ Preset. Select Standard for standard preset operation. Select EZ-Preset for quick preset editing mode. (see section 5.4.1 Batcher Configuration.) Single_Pulse The Single_Pulse setting is used for flowmeters with single pulse outputs.
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Page 54: Diagnosis And Troubleshooting
13. Diagnosis and Troubleshooting 13.1 Response of 926-ST1LE on Error or Alarm: Error and warning indications which occur during operation are indicated in the RUN mode alternately with the measured values. The 926-ST1LE Flow Computer has three types of error: TYPE OF ERROR... -
Page 55: Diagnosis Flow Chart And Troubleshooting
926-ST1LE Flow Computer 13.2 Diagnosis Flow Chart and Troubleshooting All instruments undergo various stages of quality control during produc- tion. 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. -
Page 56: Error & Warning Messages
The setup expects modem baud rate, parity, etc. usage and a modem is not • Check modem responding. connection and cycle power to 926-ST1LE • Replace modem SOFTWARE ERROR RESET Software error • Report error to factory EXTENDED PFI LOCKUP Unit was operated with an input •... -
Page 57: Order Code And Warranty
Accessories: our Warranty, repair, modification or return KEPS-KEP1-32 goods process, please contact the Flowmet- KEP RS232 for 926-ST1LE • 32 Bit OPC/DDE Server KEPS-MBS32 rics, Inc Customer Service Department. Supports RS485 for 926-ST1LE (Modbus RTU) Modem Available, see MPP-2400 and MPP-2400N (requires M option) - Page 58 926-ST1LE Flow Computer Appendix A - Setup Menus...
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