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Summary of Contents for weschler instruments BG Series
- Page 1 WESCHLER INSTRUMENTS DIVISION OF HUGHES CORPORATION OWNERS MANUAL BG Series REVISION 2.8 10/17 16900 Foltz Industrial Parkway, Cleveland, Ohio 44149 Phone: 440-238-2550 Fax: 440-238-0660 Email: sales@weschler.com...
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Page 2: Table Of Contents
Contents 1 INTRODUCTION ..........................1 2 FEATURE DESCRIPTIONS ......................2 BarGraph Protection ......................... 2 Bar Display ............................2 Digital Display ..........................2 Trend Indicators (Option) ......................... 3 Setpoints (Option) ..........................3 Temperature Measurement ........................ 4 Hysteresis ............................4 Retransmit (Option) .......................... 4 Peak/Valley (Option) ........................ - Page 3 5 CALIBRATION ......................... 21 Calibration Procedure ......................21 6 TEMPERATURE MEASUREMENT ..................24 7 ANALOG RETRANSMIT OPTION ..................25 Analog Retransmit Output Options ..................25 7.1 ANALOG RETRANSMIT CALIBRATION ................ 26 7.2 ISOLATED ANALOG RETRANSMIT CALIBRATION ........... 27 8 PEAK/VALLEY OPTION......................29 Valley Display ........................
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Page 4: Introduction
Weschler Instruments offers a complete line of BarGraph™ instruments that fit many existing analog meter cutouts (see Appendix I) and can operate with the same input signals. They provide enhanced features, such as peak/valley hold, retransmit, computer communication, plus multiple bar and digital display colors and combinations to meet customer-specific engineering considerations. -
Page 5: Feature Descriptions
BarGraph Protection Weschler BarGraphs are internally protected against power and input surges. The power supply integrates a fuse and MOV to insure that no circuit damage occurs. Input surges are virtually elimi- nated by internal CTs and PTs (for AC) and a clamping circuit (for DC). For maximum limits, see Appendix III, Specifications. -
Page 6: Trend Indicators (Option)
Trend Indicators (Option) The BarGraph provides visual indication of the process signal direction. The annunciator arrows on the front of the BarGraph are red or green LEDs that respond to changes in input signal at a rate corresponding to the programmed hysteresis. Setpoints (Option) The setpoint option converts a BarGraph from an indicator to a differential gap or on/off-style con- troller. -
Page 7: Temperature Measurement
Temperature Measurement Weschler BarGraphs may be used to measure temperature using either thermocouples or RTDs (Resistive Thermal Devices). Thermocouples consist of two dissimilar metals joined so that a poten- tial difference is generated that is a measure of temperature. RTDs depend on the fact that the resistance of any metal increases as the temperature increases. -
Page 8: Installation
Verification Remove the BarGraph instrument from its packing container. Check to make sure that the BARGRAPH LABEL (shown below) on the BarGraph and packing container are identical. Verify that the BarGraph number received is what is required for your application. Please verify this num- ber with your purchase order. -
Page 9: Electrical Hookup
Electrical Hookup Electrical connections should be made after the BarGraph has been mounted. Refer to terminal connection diagrams in Appendix II. 1. Connect the power supply to the appropriately labeled terminals. The proper power supply depends on the model BarGraph ordered. Available power supply options are: •... -
Page 10: Setup
Normal Display Operation The bar and digital displays provide visual analog indication of the process signal. When the in- coming signal is below the bottom end of the bar display, the first LED and the digital display flash at a 1 Hz rate, indicating an underrange condition. When the process signal exceeds the full scale value, the top LED and the digital display flash at a 1 Hz rate, indicating an overrange condition. -
Page 11: Operator And Supervisor Setup
Operator and Supervisor Setup Setup functions are divided into two separate classes: Operator and Supervisor. Operator Setup functions are those that may need to be changed on a routine basis for normal operation of the instrument. These functions include only the alarm setpoints. Alarm setpoint pro- gramming may be disabled under Supervisor Setup. -
Page 12: Operator Setup Programming
Activating Operator Setup If Operator Setup was enabled under Supervisor Setup (see Section 4.2 for details), pressing the red ENTER pushbutton and holding it for more than 3 seconds activates Operator Setup without installing a jumper at JA1. When operator setup is first enabled, the first function available is displayed on the digital display. This is the point at which the user both enters and leaves Operator Setup. -
Page 13: Alarm Setpoints
Alarm Setpoints Up to four alarm setpoints are provided, depending on the exact model of BarGraph™ ordered and the options supplied. Each of the available setpoints may be programmed for a specific value under Operator Setup if enabled (see Enable/Disable Operator Setup in Section 4.2). 01 - Hi-Hi Setpoint •... -
Page 14: 4.1.1 Failsafe Setpoint Setup Procedure
4.1.1 FAILSAFE SETPOINT SETUP PROCEDURE For Models Ordered with Failsafe Setpoint Option Only The failsafe setpoint feature takes advantage of the inversion of operation when low alarms are used as high alarms and high alarms are used as low alarms. This may be a bit confusing, but once understood, is completely logical. Note that special software is required for the hysteresis to operate properly with failsafe relays. -
Page 15: Supervisor Setup Programming
Activating Supervisor Setup Supervisor Setup can only be activated by installing a jumper on JA1. Refer to Appendix IV, Circuit Board Layout Drawings, for the location of JA1. When Supervisor Setup is first enabled, 00 is displayed on the digital display. This is the point at which the user both enters and leaves Supervisor Setup. - Page 16 Calibrate Zero Calibrate Full-scale Configure Barform Previous Enable/disable Operator Setup Function Configure Decimal Point Scaling Configure BarGraph™ Zero Next Function Configure BarGraph™ Full-scale Set Communication ID to 00 Codes 1 through 6; 11, 12, 13 and 14 are only displayed if the respective option was ordered. To add these capabilities, contact the factory.
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Page 17: Alarm Setpoints
Alarm Setpoints Up to four alarm setpoints are provided, depending on the exact model of BarGraph™ ordered and the options supplied. Each of the available setpoints may be programmed for a specific value under Supervisor Setup. 01 - Hi-Hi Setpoint •... -
Page 18: Enable/Disable Peak/Valley
Enable/Disable Peak/Valley (Option) Peak/Valley allows the BarGraph™ to display the highest (Peak) and lowest (Valley) level during the reading cycle, as determined by the reset. This function will only be available if the BarGraph™ was ordered with Peak/Valley option. The display will show 0 (disabled) or 1 (enabled) to indicate the current state of Peak/Valley function. -
Page 19: Bargraph Zero
BarGraph Zero ™ This is a calibration function. The following steps show how to check the current calibration set- tings. For a description of how to change the calibration, see section for complete calibration procedure. The display will show the current BarGraph™ zero. Press ENTER Pressing the INCREASE or DECREASE keys will change the calibration settings. -
Page 20: Set Barform
Set Barform This function allows the user to set the display format. The most common display format is bottom zero, ie; starts at the bottom (or left) and increasing up (or to the right). The BarGraph™ zero point can be located or referenced anywhere on or off the scale in this setup. The display will show the current barform. -
Page 21: Enable/Disable Operator Setup
Enable/Disable Operator Setup Operator Setup can be enabled or disabled through this function. If Operator Setup is disabled, setpoints for alarms 1 through 4 can no longer be set without jumper JA1. The display will show 0 (disabled) or 1 (enabled) to indicate whether Operator Setup is currently disabled or enabled. -
Page 22: Set Bar Zero
No decimal point. Decimal point after least significant digit on display. Previous Position Decimal point after 2nd least significant digit on display. Decimal point after 3rd least significant digit on display. Next Position Decimal point after 4th least significant digit on display. Decimal point after most significant digit on display. -
Page 23: Set Bar Full Scale
Set Bar Full Scale The BarGraph™ Full Scale display point may be set to a percentage of Full Scale for measurement. This is not a calibration command. It only affects the BarGraph™ display. This command and the Set Bar Zero function may be used to limit the values shown on the bar display to a specific region of interest. -
Page 24: Calibration
Calibration Procedure 1. Install jumper at JA1 (see circuit board layout drawing in Appendix IV for the location of JA1 in different model BarGraphs). The display changes to: 2. To change the BarGraph Zero, press the INCREASE ( ) or DECREASE ( ) pushbuttons until the 07 display appears and seven segments of the bar display are lit, as shown below:... - Page 25 3. Press the red ENTER pushbutton. The display will change to show 000 on the digital display and the bar display will show one segment lit. 4. Check your BarGraph's zero value. Enter the desired zero input value into the BarGraph signal input terminals.
- Page 26 8. The display will change to show the previously stored Full Scale value. 9. Enter the desired Full Scale input value into the BarGraph signal input terminals. Use a calibrated lab-standard. 10.Press INCREASE ( ) or DECREASE ( ) to load the new Full Scale value into the meter. This tells the unit that you are changing the Full Scale value, not simply scrolling through setup.
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Page 27: Temperature Measurement
All Weschler BarGraphs shipped with thermocouple inputs are linearized at the factory prior to shipment. Please check the purchase order and the label on the side of the BarGraph to verify the proper thermocouple connection. A one-hour warm-up period is required to insure accuracy. Connect the specific thermocouple wire to the compensated miniature connector provided. -
Page 28: Analog Retransmit Option
All retransmit signals are set at the factory prior to shipment and only need to be verified at installation. If the retransmitted signal needs to be calibrated, see Section 7.1 or 7.2 for retransmit calibration procedure. Retransmit Output Options √ √ √ √ √ 250 Ω... -
Page 29: Analog Retransmit Calibration
Use this procedure to recalibrate the retransmit option for option letters A, B, C, and D. 1. Remove the BarGraph from its case by unscrewing the front bezel screws and rear case screws. 2. Refer to Appendix IV, Circuit Board Layout Drawings, to locate the potentiometer for your particular model BarGraph. -
Page 30: Isolated Analog Retransmit Calibration
Use this procedure to recalibrate the retransmit option for option letters F, G, and H. 1. Remove the BarGraph from its case by unscrewing the front bezel screws and rear case screws. 2. Refer to Appendix IV, Circuit Board Layout Drawings, to locate the potentiometers for your particular model BarGraph. - Page 31 Adjust VR2 on the Option 4 PCB for the proper retransmit zero output value. Check retransmit full scale value. Apply the desired zero input value into the BarGraph signal input terminals. To identify the calibrated full scale input, check the BarGraph label for the term "ES=". The second number is the full scale input.
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Page 32: Peak/Valley Option
Valley Display To display the Valley, press the DECREASE ( ) pushbutton. While pressing the pushbutton, the bar and digital display show the present lowest Valley reading. The BarGraph continues to operate normally and display correct readings for Trend and Setpoints by illuminating the respective LED annunciator(s). -
Page 33: Replacement Parts
Quantity Description Part Number Pushbutton Switches 510-02001-00 Red Pushbutton Cap 510-02002-00 Arrow Pushbutton Caps 510-02003-00 Fuse (l/4 amp) 430-01001-00 M.O.V. (130 V-10A) 430-01002-00 Shorting Bar (JA1 Jumper) 210-01007-00 2-Pin Male Phoenix Connectors 210-01008-00 12-Pin Male Phoenix Connector 210-01010-00 3-Pin Male Phoenix Connector 210-53017-00 3-Pin Male Phoenix Connector 210-53017-00... -
Page 34: Warranty
All BarGraph products from Weschler Instruments are warranted against defects in material and workmanship for a period of two years from date of delivery. Weschler Instruments, at its option, will repair or replace all defective instruments returned to it during the warranty period without charge, provided there is no evidence that the equipment has been mishandled or abused. -
Page 35: Appendix I - Bargraph Retrofit Guide
Existing Meter Weschler Replacement GE/Yokogawa 180 Sigma/International Instruments 1151 Weschler/Westinghouse V-252/H-252 BG-252 6" Edgewise Vertical Crompton 6" A&M Weston 6" BH-252 6" Edgewise Horizontal Dixson BB101 (All Models) Triplert UB100 Weschler/Westinghouse K-231/241 BG-241 4 " Square GE Yokogawa AB/DB40 Dixson BEW51/BW051P BV-5A Hayes-Republic 3600/V5A Sigma/International Instruments 9262/9263... -
Page 36: Appendix Ii - Terminal Connections
Appendix II - Terminal Connections BG & BH-252, BD-101, BV-5A, BW-1316, PH & PG-101, PG-202 Frequency Tachometer or 3 and 4-Wire RTD Signal Inputs (OP 1) DC Volt, Millivolt, Amp or Milliamp Signal Inputs (OP3) Line Frequency or Frequency Tachometer Signal Inputs (OP4) AC or DC Volt, Millivolt, Amp, Milliamp or Line Frequency Signal Inputs (OP6) - Page 37 BG-241, BG-251, BG-261 and BG-281 These Terminals May be Used for Loop Power or Analog Retransmit, but the options may not be ordered together. Signal, Input and Output Terminal Assignments Signal, Input or Terminal Assignment Signal, Input or Terminal Assignment Output Type Number Output Type...
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Page 38: Terminal Barrier Strip Option (Bg-241, 251, 261 & 281)
Barrier Terminal Strip Option for BarGraphTypes BG-241, BG-251, BG-261 & BG-281 DC Volt, Millivolt, Amp and Milliamp Signals Terminals 3 and 4 can be used for Loop Power (24vdc supply) or Analog Retransmit. These options may not be ordered together. AC Volt, Millivolt, Amp &... -
Page 39: Line Frequency And Synchroscope (Bg-241, 251, 261 & 281)
AC Line Frequency & Synchroscope Signals Line Frequency Meter Synchroscope Terminal Assignment Terminal Assignment Number Number P4-1 Power Hi (+) P4-1 Power Hi (+) P4-2 Power Lo (-) P4-2 Power Lo (-) P4-3 Signal Lo P4-3 Running Machine Lo Signal Hi P4-4 Running Machine Hi P4-4... -
Page 40: Wattmeter Wiring (Bg-241, 251, 261 & 281)
Wattmeter Wiring Single Phase 3 Phase 3 Wire For all Watteters; when using RS-485 communications, the number 1 terminal is LO(-), the number 2 terminal is signal ground and the number 3 terminal is HI(+). 3 Phase 4 Wire... -
Page 41: Varmeter Wiring (Bg-241, 251, 261 & 281)
Varmeter Wiring 3 Phase 4 Wire with Phase Shifting Transformer 3 Phase 3 Wire with Phase Shifting Transformer For all Varmeters; when using RS-485 communications, the number 1 terminal is LO(-), the number 2 terminal is signal ground and the number 3 terminal is HI(+). 3 Phase 3 Wire Cross-Phase Connected 3 Phase 4 Wire Cross-Phase Connected... -
Page 42: Power Factor Meter Wiring (Bg-241, 251, 261 & 281)
Power Factor Meter Wiring Bar grows counterclockwise and numeric display indicates a negative sign for lagging power factor. Bar grows clockwise and numeric display indicates positive for leading power factor. For all Power Factor Meters; when using RS-485 Communications, the number 1 terminal is LO(-), the number 2 terminal is signal ground and the number 3 terminal is HI(+). -
Page 43: Rs-485 Communications Cabling
RS-485 Communications Connections DB-25 CONNECTORS LO(-) BarGraph WITH UNIT RS-232 TO RS-485 ID SET TO COMPUTER CONVERTER HI(+) LO(-) BarGraph WITH UNIT EXTERNAL ID SET TO POWER SUPPLY HI(+) UNIT IDS CAN RANGE FROM 00 TO 99 LO(-) BarGraph WITH UNIT ID SET TO HI(+) 1. -
Page 44: Appendix Iii - Specifications
Input Isolation Bar Display AC: Transformer Isolated 101 Segment LED, 1% full scale DC: Differential Linear Displays: BG-252, PC-101, PC-202: 4.0" BD-10l. 10.0" Impedance Circular Displays: BG-241: 285 100 KΩ DC @ > 4 V Input BG-261, BG-281: 270 30KΩ @ I20VAC P.T. BG-251: 270 /345 0.1Ω... - Page 45 Input Sensitivities Currents: 50 µADC - 5 ADC DC Voltage: 50 mV - 250 VDC Accuracy: ±0.04% of full scale Impedance: 100 KΩ @ > 4VDC 250Ω @ 4-20 mADC 100Ω @ 10-50 mADC TRMS Current: 1 mA - 5 AAC Voltage: 50 mV - 250 VAC Accuracy: ±0.1% of full scale Temperature - Thermocouple...
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Page 46: Appendix Iv - Circuit Board Layout Drawings
Appendix IV - Circuit Board Layout Drawings CPU Module: BG & BH-252, BD-101, BW-1316, BI-1251, BV5A, PC & PH-101 & 102, PC-202, PG-101 & 202, ML-202, BF-6400 & 6402 Lamp Test JA-1: Install a Jumper to Enter Supervisory Bar & Numeric Display Flash Inhibit Set-up Numeric Display Flash Inhibit Circuit Board Layout and Jumper Positions... - Page 47 BG-261, BG-281 BG-251 BG-241...
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Page 48: Option 4 Module (Isolated Analog Retransmit)
Option 4 (Isolated Retransmit) -
Page 49: Appendix V - Physical Dimensions
BG-241 A BG-241 has the following dimensions and recommended panel cutout: BG-261 A BG-261 has the following dimensions and recommended panel cutout: BG-251 and BG-281 A BG-251 or BG-281 has the following dimensions and recommended panel cutout: BG-251 BG-281 Dim B 7.562 10.062 Inches (mm) -
Page 50: Bg252
BG252 A BG252 has the following dimensions and recommended panel cutout: PC-101 and PC-202 A PC-101 or PC-202 has the following dimensions and recommended panel cutout:...
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