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DEGREE CONTROLS B-Series User Manual

Air velocity sensors
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B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01
B-Series Air Velocity Sensors
User Guide
DEGREE CONTROLS, INCORPORATED
18 Meadowbrook Drive
Milford, New Hampshire 03055 USA
Degree Controls, Inc. © Copyright 2018, all rights reserved.
Information in this document is subject to change without notice.
Windows® is a registered trademark of Microsoft Corporation • All other trademarks are property of their respective owners.
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B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01

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Summary of Contents for DEGREE CONTROLS B-Series

  • Page 1 18 Meadowbrook Drive Milford, New Hampshire 03055 USA Degree Controls, Inc. © Copyright 2018, all rights reserved. Information in this document is subject to change without notice. Windows® is a registered trademark of Microsoft Corporation • All other trademarks are property of their respective owners.

  • Page 2: Table Of Contents

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Table of Contents General Information ........................................ 3 Overview ........................................... 3 Features ............................................. 3 1.2.2 Electrical & Performance Features .................................. 3 1.2.1 Mechanical Features ....................................... 3 Product Specifications ......................................4 General Specifications ....................................... 4 Model Specifications .........................................

  • Page 3: General Information

    With their robust, splash proof design and UV tolerant construction, the B-Series sensors are designed to handle a wide range of product and process control air flow applications. Additionally, the B-Series is configured to order, with a variety of velocity ranges, mechanical lengths, and output communication styles available.

  • Page 4: Product Specifications

    < 0.5 m/s [100 fpm] = ±2 ˚ C [3.6 ˚ F] Temperature Compensation: The B-Series is a thermal airflow sensor; it is sensitive to changes in air density and indicates velocity with reference to a set of standard conditions (21°C (70°F), 760mmHg (101.325kPa), and 0%RH). The B-Series has been designed so that when used over the stated temperature compensation range, the sensor indicates very close to actual air velocity and minimal compensation is only required to account for changes in barometric pressure or altitude.

  • Page 5: Model Specifications

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 2.2 Model Specifications Degree Controls offers two models of the B-Series Air Velocity Sensor. The choice of model depends on the user’s voltage range and current requirements, as noted below: Name Input Voltage Range...

  • Page 6: Wiring Information

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 3 Wiring Information 3.1 Configured with Analog Output and UART Digital Communication Wire Color Wire Gauge Description Power Black Ground White Velocity Analog Output Green* 22 AWG Temperature Analog Output Orange UART Receive (RX)

  • Page 7: Mechanical Information

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 4 Mechanical Information 4.1 Probe Sensor Head Mechanical Drawings Mechanical Figure 1: B-Series Sensor Head Note: [inch]mm 4.2 °C Clamp Mechanical Drawing Mechanical Figure 2: °C Clamp Note: [inch]mm B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01...

  • Page 8: Mounting And Positioning

    Note: Multiple sensor lengths are available to accommodate insertion depths of 30mm [1.25"] to 245mm [9.6"]. See Mounting Figure 1 above for insertion "zero point" datum. The B-Series Sensor utilizes either a °C Clamp or Gland fitting for installation. Please follow the below instructions for optimal installation: 5.1.1 Gland Installation...

  • Page 9: C Clamp Installation

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 5.1.2 °C Clamp Installation 1. Drill a 7/8” 0.75” (20mm) hole into the surface you wish to install the Sensor into. • Follow the below text instructions along with the visuals in Figure 4 to install the °C Clamp.

  • Page 10: Airflow Direction

    If airflow turbulence causes excessive airflow reading variation, increasing the Sample Time (index 63) may solve the problem. Airflow Figure 2: Direction of Airflow 6 Communication The B-Series Sensors support two methods of communication: UART and I C. The choice of communication is set up at DegreeC prior to shipment. 6.1 UART The communication protocol described below is for communication between a master host and the slave Sensor product.

  • Page 11: Hardware

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Byte Read Velocity Velocity checksum checksum Velocity (Hi) (Lo) Read Tamb Tamb checksum checksum Tamb (Hi) (Lo) Read Power Power checksum checksum Power (Hi) (Lo) Memory Memory Memory Data checksum Data checksum Write...

  • Page 12: I 2 C

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 6.2 I The communication protocol described below is for communication between the I C master host and the I C slave Sensor. This protocol is used to read/write configuration variables and to read process variables from the Sensor.

  • Page 13: Velocity Analog Output (Voltage)

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Slave Slave Data Data Address Address Address Byte Byte Start bit Slave Address Sensor Address A shaded Acknowledge from the Sensor (0 to indicate Ack) Sub Address Index into the Sensor Memory Map...
  • Page 14 Velocity Analog Output Figure 2: Velocity Calculation Equation using Voutput The Velocity High Range and Vout Maximum can be obtained from the B-Series Part Number. For example, if the sensor model is “B300–2–A–1”, the Velocity High Range is 1000 mm/s (1.0 m/s) and the Vout Maximum is 5V. In this case, if Vout is 3VDC, then the velocity can be calculated per the following equation: Velocity is therefore 0.2 m/s.

  • Page 15: Velocity Analog Output (Voltage) Example

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Voutput: The Voutput value of the B300/500 sensor can also be obtained by the host reading Voutput (index 77) via the communication port. Units are in (mv). Caution: • Vout accuracy specification is only valid within the specified operational airflow range of the B300 and B500 and outside of their deadband.

  • Page 16: Velocity Analog Output (Current)

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 6.4 Velocity Analog Output (Current) 6.4.1 0-20 mA Velocity Analog Output Figure 5: 0-20 mA Example Velocity Analog Output Figure 6: 0-20 mA Calculation Equation 6.4.2 4-20 mA Velocity Analog Output Figure 7: 4-20 mA Example...

  • Page 17: Velocity Analog Output (Current) Example

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Velocity Analog Output Figure 8: 4-20 mA Calculation Equation 6.4.3 Velocity Analog Output (Current) Example For a B Cal. Range solution when utilizing 4-20 mA output, simply plug in the values found in the Calibration Range Chart...

  • Page 18: Temperature Analog Example

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Temperature Analog Output Figure 1: Toutput for (0 – 5V) and (0 – 10V) Note: If Register 10 Bit 3 is set, the temperature is scaled from -25°C to 75°C. For sensors without communications the temperature can only be determined by measuring Tout and calculating the temperature per the equation below: Tout * TemperatureRange(°C)

  • Page 19: Sensor Registers

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Toutput * 100 1.418 * 100 Temperature (°C)= = 28.36 °C Tout Maximum Temperature Analog Output Figure 3: Tout vs Temperature Example Index Name Value Description (decimal) Sets Tout maximum when Temperature Tout Maximum...
  • Page 20 B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 0x0A Configuration Flag: (bit mapped) bit 0: 0=Vout clamped at VoutMaximum; 1=Vout NOT clamped at VoutMaximum bit 1: 0=Vout set to 0v if sensor failure detected; 1=Vout set to VoutMaximum if sensor failure detected bit 2: 0=Tout set to 0v if ambient sensor failure detected;...
  • Page 21 B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 0x3B Vout Maximum: Vout maximum voltage, (mv) Per Model P/N Defines Vout when Velocity reading equals Velocity High Range Set to 5000 for 0 – 5V output Set to 10000 for 0 – 10V output...
  • Page 22 B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 Notes: RW are Read/Write setpoint variables. RWP are Read/Write setpoint variables that are Password protected. R0 are Read Only variables. When sensor registers are referenced within this document, the sensor register Name and Index will be italicized with the index number displayed within parenthesis.

  • Page 23: Degree Controls Inc. Product Warranty

    B-Series Air Velocity Sensors USER GUIDE 67500MN00-A01 8 Degree Controls Inc. Product Warranty For a period of one (1) year following the date of delivery, and subject to the other provisions of this Warranty Section, DegreeC warrants that all new products that are both (a) manufactured by DegreeC and (b) purchased directly from DegreeC (or an authorized distributor of DegreeC) shall be free of material defects in materials and workmanship.

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