DEGREE CONTROLS B-Series, User Manual

Page 1: ...nsors 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 ...

Page 2: ...Output 6 4 Mechanical Information 7 4 1 Probe Sensor Head Mechanical Drawings 7 4 2 C Clamp Mechanical Drawing 7 5 Mounting and Positioning 8 5 1 Probe Style Sensors B300 B500 8 5 1 1 Gland Installation 8 5 1 2 C Clamp Installation 9 5 1 3 Airflow Direction 10 6 Communication 10 6 1 UART 10 6 1 1 Hardware 11 6 1 2 Configuration 11 6 2 I2C 12 6 2 1 Configuration 12 6 3 Velocity Analog Output Voltag...

Page 3: ... for mounting sensor assembly without need for screws or hands inside the duct Optimized flow geometry with segregation of velocity and temperature elements for highest accuracy Aerodynamic cross section to minimize flow disturbance Robust sealed probe assembly uses corrosion and UV resistant materials Printed insertion depth markers and flow direction arrow Conformal coated sensing elements for e...

Page 4: ...sensor uses a hot bead algorithm and at low velocities the error in air temperature measuring grows due to self heating effects The air temperature accuracy is specified as a function of velocity at velocities 0 5 m s 100 fpm 1 C 1 8 F at velocities 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 ve...

Page 5: ...Consumption 2 3 Hardware Configuration Length 1 203mm 8 0 max insertion depth 160mm 6 3 2 305mm 12 0 max insertion depth 263mm 10 4 Velocity Profile A 1 0 to 1 0 m s 200 to 200 fpm B 10 to 10 m s 2 000 to 2 000 fpm C 20 to 20 m s 4 000 to 4 000 fpm Output Configuration 1 0 5 VDC air velocity output 2 0 5 VDC air velocity and air temperature dual outputs 3 0 10 VDC air velocity output 4 0 10 VDC ai...

Page 6: ... for purpose built airflow switches 3 2 Configured Only with UART Output Wire Color Wire Gauge Description Red 22 AWG Power Black Ground White UART Receive RX Green UART Transmit TX 3 3 Configured Only with I2 C Output Wire Color Wire Gauge Description Red 22 AWG Power Black Ground White SCL Green SDA Notes 1 For I2 C communication external pull up resistors to 3 3V for SDA and SCL are required Th...

Page 7: ...A01 B Series Air Velocity Sensors USER GUIDE 67500MN00 A01 7 4 Mechanical Information 4 1 Probe Sensor Head Mechanical Drawings 4 2 C Clamp Mechanical Drawing Mechanical Figure 2 C Clamp Note inch mm Mechanical Figure 1 B Series Sensor Head Note inch mm ...

Page 8: ...r optimal installation 5 1 1 Gland Installation 1 Drill a 7 8 0 75 20mm hole into the surface you wish to install the Sensor into Follow the below instructions to install the Sensor via Gland Fitting 2 Adjust the Sensor s insertion depth use the printed ruler on the Sensor s body for reference and tighten the gland nut onto the Sensor body A in Figure 2 below 3 Insert the Sensor into the drilled h...

Page 9: ...ow and place onto the drilled hole Using the provided screws tighten the C Clamp on the right and left side to the surface 3 Insert the Sensor into the hole of the C Clamp and adjust the Sensor s insertion depth use the printed ruler on the Sensor s body for reference ensuring that the sensor head see section 5 3 Airflow Direction is facing the intended direction 4 Using the provided screw tighten...

Page 10: ... Direction of Airflow 6 Communication The B Series Sensors support two methods of communication UART and I2 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 This protocol is used to read write configuration variables and to read process variables from the ...

Page 11: ... integrity The checksum byte is determined by performing an exclusive or logic operation of the first three bytes The tables below define the seven host commands supported and the appropriate sensor reply Password Protection Memory locations designated as RWP in the Memory Map require two consecutive Memory Write commands to change the setpoint Command 1 Memory Write 0xAA to the Password index 83 ...

Page 12: ...ult Address of 192 This address may be changed to an arbitrary 8 bit value by writing to the sensor s I2 C address register and cycling power The I2 C commands for the Sensors are defined as per the following tables 1 7 1 1 8 1 8 1 1 S Slave Addres s Wr A Sub Addres s A Data Byte A P S Start bit Slave Address Sensor Address Wr 0 A Acknowledge from the Sensor Sub Address Index into the Sensor s Mem...

Page 13: ...orming a Write Byte command to I2 C Base Device Address index 0 with the new base address The new base address will become active after the next power cycle Password Protection Setpoints designated as RWP in the Memory Map require two consecutive I2 C write commands to change the setpoint Command 1 Write 0xAA to the Password index 83 Command 2 Write the new value to the password protected register...

Page 14: ...s without communications the velocity can only be determined by measuring Voutput and calculating the velocity per the equation in Figure 2 below 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 ...

Page 15: ... with an 8 3 tube so the appropriate model is B300 3 B 1 Figure 4 illustrates the Vout vs Velocity for this sensor model Table 1 below lists the internal register configuration for this model Name Index decimal Value Description Configuration Flag 10 0b00000000 Please see section 7 1 Memory Map Velocity Deadband Limit 50 51 500 Standard Velocity Low Range of 500 mm s Velocity High Range 52 53 1000...

Page 16: ...ir Velocity Sensors USER GUIDE 67500MN00 A01 16 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: ...t outputs are unable to drive the desired current AND the sensor is configured for current out i e Config Flags Index 10 bits 1 and 2 have not been set bit 6 in Memory Location 66 will be set However only if the current output error bit is set in the config register 6 5 Temperature Analog Output The sensor temperature is translated to an analog voltage with a fixed range The output voltage that co...

Page 18: ...on Equation Tout The Tout value of the B3 500 sensor can also be obtained by the host reading Toutput index 79 via the communication port Units are in mv 6 5 1 Temperature Analog Example Requirements Application temperature range is 0 100 C Output Voltage at 100 C should be 5 0V In this example the Tout signal measures 1 418 VDC The equation below calculates the corresponding temperature The table...

Page 19: ...The sensor setpoints and process parameters can be accessed by reading and writing into the memory map using the appropriate serial communications interface The table below provides specific details for these parameters 7 1 Memory Map Index Type Size Name Description Default Dec Hex 0 0x00 RWP 1 I2C Base Device Address used in I2C Communication Mode Only 0xC0 1 0x01 RO 1 Communication Mode 5 UART ...

Page 20: ...ber and Serial Number i e the order in which a particular sensor was processed on a Work Order ID Data 24 0x18 RO 6 ID Data 30 0x1E RO 4 ID Data 34 0x22 RWP 4 Multidrop UART Address 1 Byte Identifier which can be used as an address for support of multidrop UART communications protocol A value of 0 means that mulitidrop messages will be ignored In order to set this byte Sensor Power Average address...

Page 21: ... 0 bit 3 Ambient Temperature Sensor Error bit 4 Air Flow Temperature Sensor Error bit 5 Toutput Control Error disabled if ToutMaximum 0 bit 6 0 current output drive error enabled 1 current output drive error disabled bit 7 not used N A 67 0x43 RO 2 Velocity Velocity measured from last conversion cycle mm s N A 69 0x45 RO 2 Raw Velocity Reading Unfiltered velocity measurement mm s N A 71 0x47 RO 2 ...

Page 22: ...d Write setpoint variables that are Password protected 3 R0 are Read Only variables 4 When sensor registers are referenced within this document the sensor register Name and Index will be italicized with the index number displayed within parenthesis For example the Sample Time at index 63 would be depicted as Sample Time index 63 The index number will be in decimal format ...

Page 23: ...products that are not manufactured by DegreeC Such parts components or products may be warranted by third parties on a pass through basis The foregoing remedies shall not apply to any product failure caused in whole or in part by i Buyer s failure to operate maintain or service the products in accordance with DegreeC s documentation ii any alteration modification or repair made to the products oth...