Badger Meter Blancett B220-880 User Manual Download Page 1 | Manualshive

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K-Factor Scalers

Models B220-880, B220-881, B220-882 and B220-885

SGN-UM-00281-EN-06 (June 2021)

User Manual

B220-880

B220-881

B220-882

B220-885

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Summary of Contents for Blancett B220-880

Page 1: ...K Factor Scalers Models B220 880 B220 881 B220 882 and B220 885 SGN UM 00281 EN 06 June 2021 User Manual B220 880 B220 881 B220 882 B220 885 ...

Page 2: ...K Factor Scalers Models B220 880 B220 881 B220 882 and B220 885 Page ii June 2021 ...

Page 3: ...Mounting necessary for CSA certification 7 Power 7 Turbine Meter 7 Startup and Configuration 8 Setting the K Factor 8 Setting the Output Pulse Width 8 Setting the Output Level 9 Setting the Internal or External Pullup Resistor 9 Pulse Output 9 Internal Pullup Resistor 10 External Pullup Resistor 10 Specifications 12 K Factors Explained 13 Calculating K Factors 13 User Manual Page iii June 2021 ...

Page 4: ...K Factor Scalers Models B220 880 B220 881 B220 882 and B220 885 Page iv June 2021 ...

Page 5: ...not avoided could result in severe personal injury or death Indicates a hazardous situation which if not avoided is estimated to be capable of causing minor or moderate personal injury or damage to property Considerations The installation of the B220 880 and B220 881 K Factor scaler must comply with all applicable federal state and local rules regulations and codes CAUTION IF THE EQUIPMENT IS USED...

Page 6: ...m a low level turbine meter is proportional to the logic level frequency output needed by a PLC or CPU data acquisition card This option allows the end device to control the dividing process of the turbine meter output to a recognizable flow rate OPERATING PRINCIPLE Fluid moving though a turbine flow meter causes the rotor to rotate in relation to the flow rate The rotation of the rotor blades cut...

Page 7: ...rminal connections Enclosure Mounting necessary for CSA certification If the circuit board assembly is supplied without an enclosure it must be mounted within a certified Appleton one inch NPT model GRL100 A or GRLB100 A conduit outlet box to maintain the CSA Ordinary Locations certification The label containing the hookup information should be placed on the inside of the cover of the enclosure Th...

Page 8: ... right most switch represents the least significant digit of the K factor number see Figure 2 on page 7 For example to set the K factor as 4572 the switches should be set as shown in Figure 3 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 9 9 9 9 4 5 7 2 Figure 3 Setting the rotary swit...

Page 9: ...resistor must be used for the K factor scaler board to provide an output pulse This option is controlled by position 5 of the DIP switch 1 2 3 4 5 ON C K SDA05 UP ON DOWN OFF Figure 6 Switch 5 settings When DIP switch 5 is in the on position see Figure 6 the internal 3 6 kΩ pullup resistor is connected to the input voltage of the board The output pulse swing is approximately 0 7 volts less than th...

Page 10: ...7V 3600Ω 47Ω Using the equation above the maximum current available at an input voltage of 30V is 8 mA Verify that the receiving device input current requirement is below this value for proper operation Use an external pullup resistor less than 3 6 kΩ if the value is higher than the available current 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 ...

Page 11: ...esistor value is calculated make sure in the following equation that power P the power capabilty of the output is less than or equal to 0 25 Watts Exceeding this value can cause damage to the K factor scaler circuit Raising the resistor value decreases the available power output and safeguard the circuit P Supply Voltage Supply Voltage R 47 Ω 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3...

Page 12: ...tage 0 7V DC VL Less than 0 4V maximum input power Internal pullup resistor 3 6 kΩ enabled disabled by jumper Pulse Output using external pullup resistor Maximum current 100 mA VH Input voltage to external pullup resistor VL VH selected resistor value 47 Ω 47 Ω Pulse length 150 µs 1 ms 25 ms 100 ms 500 ms 1 s or auto mode Enclosure Ratings Model B220 885 Killark aluminum capped elbow Y3 CSA approv...

Page 13: ...n 30 seconds because the flow rate and hence the speed that the 1000 counts is accumulated is twice as great Calculating K Factors Many styles of flow meters are capable of measuring flow in a wide range of pipe sizes Because the pipe size and volumetric units the meter will be used on vary it may not possible to provide a discrete K factor In the event that a discrete K factor is not supplied the...

Page 14: ...d travel 0 384 gallons will pass What is the flow rate in gpm at 4 3 ft sec 0 384 gallons 4 3 FPS 60 sec 1 min 99 1 gpm Now that the volumetric flow rate is known all that is needed is an output frequency to determine the K factor Known values are Frequency 700 Hz By measurement Flow Rate 99 1 gpm By calculation 700 Hz 60 sec 42 000 pulses per gallon K factor 42 000 pulses per min 99 1 gpm 423 9 p...

Page 15: ...INTENTIONAL BLANK PAGE Page 15 June 2021 SGN UM 00281 EN 06 ...

Page 16: ...appearing in this document are the property of their respective entities Due to continuous research product improvements and enhancements Badger Meter reserves the right to change product or system specifications without notice except to the extent an outstanding contractual obligation exists 2021 Badger Meter Inc All rights reserved Control Manage Optimize ...

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