V-Sensor data sheet
Contents
1. SJ Silencer CMR Veloprobes 7 Oval Flowprobe de ii V Sensor sensor TA il ve Duct probe Duct Probes V Sensor Veloprobe ai Oval Flowprobe The CMR V Sensor is an ultra low high precision Velocity Pressure Transmitter which has been designed to accurately measure air volumes in Ventilation Ducts The built in Square Root Extraction and Magnification Factor Scaling makes the V Sensor an extremely versatile measurement instrument It can display the actual volume in m3 s Other Units such as m3 h litres s or ACR Air change rate can be selected via the keyboard Any imperial measurement units i e CFM are available on request The CMR PVC tubing can be run up to 200m from the sensing station to the V Sensor without losing the accuracy of the measurement The V Sensor is used for monitoring and also controlling Volume Flow in Commercial or Process Applications and is designed to be connected to any CMR Veloprobes Duct Probes Flowgrids Venturis and Fan Inlet Rings It can also be used with any existing or custom made duct Flow Measurement Device The measured values can be transmitted to remote display plates SCADA BMS control systems or industrial PLCs through the output signals of 0 10V 4 20mA modbus 1 and 2 Calibration Certificates traceable to National and International Standards UKAS are supplied with all V Sensors TYPICAL CMR AIR VOLUME MEASUREMENT APPLICATIONS Me2. DIS 125 Display 7 o r os gt J RE HE rd az Se h ae DIS 125 Display DIS 110 Display LED 225 Alarm with green red LED ring in Mute Button Display ROOM 3 LED 225 Display The above schematic shows a typical clean room The room pressures are measured in cascades starting in Room 3 from a reference such as a plant room or any other stable location then measuring across to room 2 and finally across to Room 1 Each room has an air probe plate fitted to the ceiling The air probes are connected to the V Sensors with red and blue CMR PVC Tubing The CMR PVC tubing can be run up to 200m from the room to the P Sensor without losing accuracy of the measurement Remote LED display plates are fitted for the operators to see the actual room pressure in Room 1 and 2 Room 2 has also a local illuminated alarm green and red led built as ring into the mute button and a buzzer Room 3 has only a modbus alarm led indicator plate TYPICAL PRESSURE APPLICATIONS The V Sensor is a true Low Differential Air Pressure Transmitter and can be used for static pressure vacuum pressure and differential pressure measurements in positive or negative areas The operator keyboard with LED display is fitted into the lid as standard and shall display the actual pressure All parameters can be adjusted without opening the lid The Pressure measurement can be transmitted via modbus rtu or analogue si
3. 9999mm l Duct height 0 9999mm d Air Density Factor 0 9 99kg m3 r Room Size 0 9999m3 S Small Value Shut off 0 99 99 O Output Re Scaling bFI Bi Directional Flow Oor 1 DISPLAY KEY Pressing the display key very quickly once will display the measurement units i e Pa hPa kPa etc and is the units the sensor has been configured to i e Pa By pressing the display key for 1 seconds it enters the configuration menu Sd Display Smoothing 0 99 Pa Pascals hpa hecta Pascals 3pa kPa nnps metres per second lps litres per second nn3s cubic metres per second nn3h cubic metres per hour acr Air Change Rate per hour dp Decimal Place 0 4 pos Display polarity neg Display polarity Led Display Activation 1ort L2b Leading Zero Blanking 1 4 CMR CONTROLS Precision Air Pressure and Volume Sensors web Copyright 2011 2012 2013 2014 All rights reserved Page 5 KEYBOARD FUNCTIONS V SENSOR STANDARD LED KEYBOARD 5 Digit Green Red Red LED Alarm ZERO LEGEND Display LED s Key Label peppu x y RANGE OUTPUT DISPLAY ALARM UP amp DOWN Key Key Key Key Selection Keys ALARM KEY Pressing the alarm key quickly shall mute the alarm as the V Sensor has an alarm buzzer built in By pressing the alarm key for 1 seconds it enters the configuration menu L LowAlarm H HighAlarm t Alarm timer 1 t Alarm timer 2 u Units af Alarm Function Sr SelfReset rb Remote Buzzer 0
4. density and magnification K factors can be entered in the V Sensor via the keyboard very easily and only the measurement range for 0 10V or 4 20mA must be given to the BMS at final commissioning For multiple duct applications the total supply and extract air volume is derived by adding all air volumes from the individual ducts Example of Volume adding V Sensor scaling in m s only Adjust the Impact Veloprobe red to face the Airflow and and adjust the Static Veloprobe blue to approx 180 away from the airflow Scaling of the duct height and width is done in the BMS Use the keyboard and adjust the display to m s Adjust the height and width to 1 and adjust the mf to 2 000 Press the very left hand key briefly and the sensor range is displayed for a short time which is the range at 10V in m s If the range of the sensor is 100Pa then it should display 9 128 m s Take a Pitot Tube reading in the duct and if the velocity is not equal to the display then adjust the magnification factor until it is equal then press the range key again to get the new range in m s Exhaust Air Extract Air V Sensor V Sensor Fresh Air V Sensor Supply Air V Sensor S E an offset for positive or negative building pressure S1 S2 S3 E1 E2 offset or S E1 E2 offset etc V Sensor scaling in m3 s m3 h I s ACR air change rate Adjust
5. 0 P0100 P12 C MR CO N TRO L S 22 Repton Court Repton Close Phone 44 0 1268 287222 Ltd Basildon Essex SS13 1LN GB Fax 44 0 1268 287099 Precision Air Pressure and Volume Sensors web www cmr controls com mail sales cmr controls com Copyright 2011 2012 2013 2014 All rights reserved The information is subject to change without notice Issue V GB 04 2 Page 7 V SENSOR TECHNICAL SPECIFICATION __ Ranges from 200Pa 7500Pa_up to max 10 times of range if over pressure protection is off Media Non corrosive gases such as Air N2 O2 Co2 N20 and inertgases O AC Power Supplies Transformer Isolated 24 Vdc 19 to 31Vdc smoothed 118mA Internal Fuse 300mA Auto Reset Voltage Output Signal 0 10V 0 t0100 of Range RL 5kOhm min a Other output signals e g 2 10V or PID loop control is programmable via the keyboard Current Output Signal 4 20mA 0 to100 of Range RL 500 Ohm max 0 20mA or PID control is programmable via keyboard One Alarm changer over volt free contact is user programmable Commands Modbus register assignments to read and write are available in user manual 0 25 of Full scale gt 100 Pa and 0 25Pa lt 100Pa Mounting Position Weight Po tternatively Barbed Nipple 4mm OD x 15mm long for silicone tube on special request Plastic ABS Light Grey RAL7035 Protection IP65 PENG 1326 1 EMC EN61010 1 SAFETY S O V SENSOR DIMENSIONS AND CONNECTIONS 122mm
6. 10rP rA RemoteAlarm Indication 0 ForLH rt Re alarm timer 0 999 minutes tU Alarm timer units sorh 999 999 U Display Units or Per 2 1 COO209P UP DOWN KEY The up and down keys are used to select the various parameters OUTPUT SIGNAL 0 10V and 4 20mAare also available on J7 V SENSOR CIRCUIT BOARD Eoo 9 refer to SPAN 6 product hu 3s Label Coil SWS Big P2 oN Connector 26 I mi A gt Z 2 ZERO Q amp a he D Z O o Z 22 T oaoa O aq oO ad 8 SC G Swi gt 5 MODBUS 2 J on F 5 141516 oO ad gt S 5 6 NO C NC oO on o e E DO MoDBus 1 12345678 oe o E OnE 2 ea o O N GND pa PON Analogue Display 22 Repton Court Repton Close Basildon Essex SS13 1LN GB Fax www cmr controls com Phone 44 0 1268 287222 44 0 1268 287099 mail sales cmr controls com CMRI The information is subject to change without notice Issue V GB 04 2 V SENSOR GENERAL CMR manufactures the V Sensors to suit many low pressure and volume measurement applications Because of the variety of pressure ranges output signals and power supplies it has been necessary to design an easy to use selection table for anybody to make up a V Sensor specification to satisfy a requirement On the V Sensor Selection Table you will find all specifications available with the associated ordering code V SENSOR BASE PART NUMBER The V Sensor Part Number starts with a base part number o
7. V SENSOR AIR PRESSURE AIR VOLUME e Ultra low pressure and volume measurement e Traceable Calibration Certificate is included e High accuracy and repeatability e Linear pressure or air volume output e Both measurement and PID control output e Two modbus for monitoring and remote display e One alarm relay buzzer and LED indicators e Auto Zero and overload protection is standard e Operator keyboard display for all functions e Two Modbus rtu 0 10V and 4 20mA outputs e IP65 enclosure with easy mount wall bracket e 24 month warranty e 30 Years field application experience GENERAL The V Sensor is a wall mount ultra low pressure transmitter which provides 0 10V and 4 20mA as well as Modbus communication over the selected range The display can be adjusted via the keyboard to show the measured value in Pa hPa kPa m s s m3 s m3 h and ACR air change rate A PID control output can be selected but still having one output for monitoring the pressure or volume The pressure ranges can be adjusted via the keyboard but the base range is factory calibrated and certified i e 10 25 50 100 250 and going up to 7500 Pa All ranges can be adjusted to ie 25Pa Power supply 24Vdc ac non isolated or 24 110 and 230Vac isolated are available as standard CMR TRANSDUCER The transducer is manufactured by CMR with high precision engineered components The principle is the measurement of the displacement of the d
8. _ gt Modb tu No 2 ibis Ali 24Vac 50 60Hz Isolated 24Vdc Non lsolated masa J8 J2 J8 J2 z E o 0 asooo 7 O 5 zZ oS oe ee ee Sy epee a eS o O a So 272 2 O Dp 28 Oz rerz an b F a ae N Modbus G A TE N O Modbus A high low lt rtu 1 Z rtu 1 O O J13 Relay O0 3 or 4 Wire Connection 3 or 4 Wire Connection S 1415 16 A link wire can be fitted GND 2is the same as 2 m from 2 to 11 GND 11 OTORO Z J 83mm jg 110Vac 50 60Hz Isolated J2 Jg 230Vac 50 60Hz Isolated jo V Sensor in ABS Enclosure TUBE CONNECTIONS M Q 2 x 6mm Barbed x 15mm for PVC or 3 1 Q 5 8 8 S z 2 5 g 8 4 O N Modbus N Modbus CABLE ENTRY rtu 1 a m rtu 1 D 1 x M20 Gland for ABS Enclosure 1 x M12 Gland for ABS Enclosure 4 Wire Connection 4 Wire Connection C MR CO N TRO L S 22 Repton Court Repton Close Phone 44 0 1268 287222 Ltd Basildon Essex SS13 1LN GB Fax 44 0 1268 287099 Precision Air Pressure and Volume Sensors web www cmr controls com mail sales cmr controls com Copyright 2011 2012 2013 2014 All rights reserved The information is subject to change without notice Issue V GB 04 2 Page 8
9. allation Thereafter every control function can be accessed via the keyboard even the calibration can be carried out utilising this functionality ZERO KEY When pressing the zero key for 1 seconds the V Sensor shall perform a zero which means the pressure is taken off the sensor internally and the diaphragm is relaxed to Zero PASSWORD The keyboard can be password protected so that only the display can be operated but no adjustments can be made RANGE KEY Pressing the range key very quickly once will display the sensor range i e if it shows 100 this means the range of the sensor has been configured to 0 100Pa for 10V 20mA output By pressing the range key for 1 seconds it enters the configuration menu S Software Version 1 5 Ad Network Address 1 254 0 Denotes Modbus Display AZ Auto Zero on off P Positive Range i e 25 n Negative Range i e 25 Opp Over Pressure 1 on O off F Zero Offset t Set Point Sn Modbus smoothing doro Adj Internal External lorE Azt Auto Zero time interval 1 99h FF Modbus float format 0 3 OUTPUT KEY Pressing the output key very quickly once will display the sensor output configuration i e lin or root which means the sensor measures pressure or airflow By pressing the output key for 1 seconds the configuration menu can be reached So Output Smoothing 0 99 Lin Output mode linear pressure root Output mode square root e Output scaling F Lor Fac F Mag Factor 0 99 99 _ Duct width 0
10. asurement and PID control Measurement and PID control Measurement and PID control Measurement and PID control Measurement and PID control Measurement and PID control CMR FGG Flowgrid Silencer Oval Flowprobe Measurement and PID control Measurement and PID control Round Flowprobe CMR Fan Inlet Ring CMR CONTROLS Precision Air Pressure and Volume Sensors web Copyright 2011 2012 2013 2014 All rights reserved Page 3 22 Repton Court Repton Close Basildon Essex SS13 1LN GB www cmr controls com Phone 44 0 1268 287222 Fax 44 0 1268 287099 mail sales cmr controls com The information is subject to change without notice Issue V GB 04 2 V SENSOR VELOPROBE MEASUREMENT GENERAL The drawing shows a typical application for CMR Veloprobes and V Sensors The supply air duct can either be fitted with one central Veloprobe or individual Veloprobes on each of its branches In many cases the positions of the Veloprobes are very much dictated by the design of the building The CMR Veloprobe can be fitted in almost any position in order to provide accurate measurements In a single supply and extract duct application the V Sensor measures the building s actual total supply and return volumes As both V Sensors are calibrated to provide a linear air volume signal tracking of supply and extract air is now made easy The duct height width or diameter
11. be dampened A calibration mode can be selected so that all of the parameters remain the same as commissioned and only the base sensor shall be calibrated and displayed in Pa MODBUS rtu COMMUNICATION The modbus communication can be used to read and write all parameters by the remote Host which can be the BMS PLC or PC REMOTE ALARM DISPLAY A remote display DIS110 without alarm or DIS125 with alarm and mute button can be connected via Modbus if the modbus is not used for the BMS The alarm button has green and red Led light rings to show healthy or alarm status A buzzer is also fitted A separate power supply can be wired to the display Remote Display Plate Phone 44 0 1268 287222 44 0 1268 287099 mail sales cmr controls com CMRI The information is subject to change without notice Issue V GB 04 2 V SENSOR ROOM PRESSURE MEASUREMENT WITH CMR V SENSORS PRESSURE APPLICATIONS aa N V SENSOR V SENSOR Typical Clean Room Pressure Monitoring and Alarming ee V SENSOR Tubes Fittings 45 0 Pa DIS 110 Display CMR Blue Tube nssnnannndannnsnnnnnnnnnnnannnnnnnnnnnnnnnnnnnnnnnnnng CMR Red Tube a a Ceiling Air Probe Air Probe DIS 110 Display L FEE Air Probe Plate GTEELELEEE Ptr iii rir iii AIR Probe CMR Blue Tube Reference CMR Red Tube
12. eyboard to provide this off set In the Example we have selected Dual 0 10V amp 4 20mA which has the Code 1 The Part Number extends to 241A0025P0025P 1 POWER SUPPLY CMR can supply 24Vdc 24Vac Non lsolated which does not have an isolation transformer and is also suitable for 3 Wire connection Most common is the 24Vac Isolated 110Vac and 230Vac are less used but also selectable In the example we have selected 24Vacisolated which has the Code 3 The Part Number extends to 241A0025P0025P 13 FINAL PART NUMBER The Part Number to order is 241A0025P0025P13 Now try and select your own V Sensor using the V Sensor Order Selection Table 22 Repton Court Repton Close Phone 44 0 1268 287222 Basildon Essex SS13 1LN GB Fax 44 0 1268 287099 Precision Air Pressure and Volume Sensors web www cmr controls com mail sales cmr controls com The information is subject to change without notice Issue V GB 04 2 V SENSOR ORDER SELECTION TABLE The Selection Table has been prepared to make ordering easy Each column contains a number of different options which are available and a Part Number can be established by you depending on a specific requirement The Example Part Number 241A0025P0025P13 which is printed above the Selection Table and identified as being a V Sensor with ABS enclosure having an LED Display and Keyboard with an issue No 1 with 6mm barbed tube connectors a Negative Pressure Range of 25 Ran
13. f the type of sensor Code 24 which is a V Sensor in a standard ABS enclosure The Part Number therefore starts with 24 V SENSORISSUE No The V Sensor will have a version number to identify the model The Code is 1 for version 1 The Part Number extends to 241 TUBE CONNECTORS 6 mm barbed nipples to fit CMR PVC Tube are fitted as standard into the ABS box They have the Code A 4 mm barbed nipples to suit the CMR SiliconeTube are also available as Code B The example has 6 mm barbed nipples which is standard The Part Number therefore extends to 241A NEGATIVE PRESSURE RANGE The Negative Range is specified as If the application requires to measure a negative pressure against a reference i e a room has to be at negative pressure compared with the corridor then the room has to be connected to the Red or nipple The blue nipple shall be connected to the reference in this case the corridor The negative room pressure shall suck on the red nipple and the V Sensor produces an output signal equivalent of the negative pressure measured Inthe Example we have chosen 25 which has the Code 0025 The Part Number extends to 241A0025 If the V Sensor must only measure in the positive Range i e 0 25 then the Negative Range will always be selected as 0 and the Code is always 0000 PRESSURE UNITS The negative pressure and the positive pressure range must be expressed in
14. ge Units in Pa Pascals and a Positive Range of 25 labelled in Pa Pascals with Dual Output Signals of 0 10V amp 4 20mA which would mean in this case 0 Pais 5V amp 12mA The Power Supply is 24Vac The V Sensor would be supplied with a 5 digit LED Keyboard Display mounted internally into the Lid and the Measured Units are Pa Pascals The Decimal Point is user adjusted to 1 on the keyboard which indicates from 25 0 Pa to 25 0 Pa It comes with a traceable Calibration Certificate to national and international Standards UKAS A a Eo Positive Range Units EE Negative Range Range 0000 0010 0025 0030 0050 0060 0100 0120 0125 0150 0200 0250 0500 0750 1000 1250 1500 2000 2500 5000 7500 0000 0150 0200 0250 o500 o750 1000 1250 1500 2000 2500 5000 7500 O _ a HOW TO ORDER EXAMPLE A wall mount pressure transmitter is required of the Type V Sensor An LED complete with Keyboard is required as standard with an issue No 1 The tube connections must be 6mm for CMR PVC Tube The negative pressure range must be 100 Pa The measured units must be in Pascals Pa The positive pressure range must be 100Pa The units on the LED display must in Pa as well as on the Product label The output signal must be Dual 0 10V amp 4 20mA The power supply must be 24Vdc_ non isolated Call CMR for assistance at any time The part Number for this V Sensor is 241A010
15. gnals 0 10V or 4 20mA to the SCADA BMS or industrial PLC systems for long term monitoring All future calibration can be done using the calibration mode Calibration Certificates traceable to National and International Standards UKAS are supplied as standard with all V Sensors Measurement and PID control Measurement and PID control Measurement and PID control Measurement and PID control Measurement Measurement and PID control Room Pressure Differential Room Pressure and PID control Measurement and PID control Measurement and PID control Filter Pressure Velocity Pressure CMR CONTROLS Precision Air Pressure and Volume Sensors web Copyright 2011 2012 2013 2014 All rights reserved Page 2 22 Repton Court Repton Close Basildon Essex SS13 1LN GB www cmr controls com Phone 44 0 1268 287222 Fax 44 0 1268 287099 mail sales cmr controls com The information is subject to change without notice Issue V GB 04 2 V SENSOR AIR VOLUME APPLICATIONS VELOCITY PRESSURE AND AIR VOLUME MEASUREMENT WITH CMR V SENSORS Exhaust Air Pabedan anart ot ooa aa ott Eea fee VVM Venturi V Sensor Venturi PVC Tube Fittings Typical air volume measurement in air distribution systems Fresh Air Sensor V Sensor
16. iaphragm by means of a push and pull variable reluctance circuit which is not affected by humidity and hence it can be used in any industrial or commercial environment There are no mechanical connections to any of the sensing coils and the diaphragm CMR Transducer Extremely low pressures can be measured with excellent repeatabil ity and minimal hysteresis The diaphragm displacement is so small that no air volume is required to measure the air pressure which means measurement tubing can be connected in excess of 200m throughout the building without losing accuracy or measurement speed The zero drift is minimized by the measuring copper coils which are matched to provide excellent self compensation One coil measures positive and the other negative drift and therefore balances any excessive drift between two tolerance limits in its life cycle The CMR Transducer has a proven field track record of over 30 years All CMR Sensors are temperature compensated in a computerised climate chamber CMR CONTROLS Precision Air Pressure and Volume Sensors web Copyright 2011 2012 2013 2014 All rights reserved Page 1 CMR Climate Chamber 22 Repton Court Repton Close Basildon Essex SS13 1LN GB Fax www cmr controls com V SENSOR Wall Mount with Keyboard and LED display KEYBOARD DISPLAY A combined keyboard and LED Display is fitted into the lid and is connected to the V Sensor board
17. the Impact Veloprobe red to face the Airflow and and adjust the Static Veloprobe blue to approx 180 away from the airflow Scaling the range for the BMS Use the keyboard and enter the duct height and width or simply enter the width of a round duct and keep the height at 0 Adjust the magnification factor mf to 2 000 Use the display key and select m3 s m3 h I s or ACR Air Change Rate and adjust the decimal places When pressing the left hand key the sensor range shall be displayed in the selected units at 10V Take a Pitot Tube reading in the duct and if the volume is not equal to the display then adjust the magnification factor until itis equal then press the range key again to get the new range V Sensor air volume measurement with Veloprobes in Duct Veloprobes V Sensor CMR CONTROLS Precision Air Pressure and Volume Sensors web Copyright 2011 2012 2013 2014 All rights reserved Page 4 22 Repton Court Repton Close Basildon Essex SS13 1LN GB Fax www cmr controls com Phone 44 0 1268 287222 44 0 1268 287099 mail sales cmr controls com ICMR The information is subject to change without notice Issue V GB 04 2 V SENSOR FUNCTIONS Use Operator Manual for full Instructions The V Sensor LED Keyboard has been designed to simplify installation and commissioning The only time the lid must be opened is for wiring during inst
18. units i e Pa or kPa The CMR transducers are in Pascals Pa as standard Inthe example Pawas selected with Code P The Part Number extends 241A0025P POSITIVE PRESSURE RANGE To measure Positive Pressure against a reference it is necessary to select a positive range i e 25 The Code is 0025 This means the V Sensor selected above can measure from 25 Pa to0 and from 0 to 25 Pa The output Voltage would therefore be 5V or 12mAat0 Pa The Part Number extends to 241A0025P0025 CMR CONTROLS Copyright 2011 2012 2013 2014 All rights reserved Page 6 ORDER DESCRIPTION LABEL UNITS As the V Sensor has a fixed label next to the LED display i e Pa kPa hPa mB etc It is necessary to specify the label when selecting the part number as this is all part of the validation of the instrument In the example Code P for Pa was selected The Part Number extends to 241A0025P0025P OUTPUT SIGNAL The Industry Standards for Output Signals are 0 10V or 4 20mA but other signals can be adjusted via the keyboard by the operator If O 10V is the Output Signal for 25 Pato 25 Pathen5Vis O0 Pa From 5V to OV the V Sensor measures from 0 Pa to 25 Pa i e 12 5 Pa would be 2 5V From 5V to 10V the V Sensor would measure positive Pressure from 0 Pato 25 Pa i e 12 5 Pa would be 7 5V It is standard to use equal ranges 25 Pa to 25 Pa rather than 25 Pa to 50 Pa but the V Sensor can be adjusted via the k
19. with a plug in ribbon cable All parameters can be accessed via the key pad The display can also be programmed to switch off after a time and by touching a key to light up again Normally itis always on PARAMETER CONFIGURATION The duct width and height can be entered as well as the density and mf magnification K factors to scale Fan Inlet Rings Flowgrids Veloprobes Oval Flowprobes Venturis or any other velocity pressure producing probes The volume can be linearized over 8 points to provide extremely high accuracy in measurement The range can be changed from 10 Pa to 30 Pa or 20 to 120 Pa The output signals can be changed to i e 2 10V 1 5Vor 5 19mA The V Sensor has a configurable Volt Free alarm output relay The auto zero function is built in which is of great advantage at very low velocity pressure measurement i e 0 3 Pa to have an accurate base point at all times The auto zero can be turned off where it is not required The overload protection can be switched on and is ideal to protect the low pressure diaphragm It is active whenever the sensor is powered up One of the outputs can be configured to be a PID control to drive fan inverters or modulating dampers and the other can be used for the actual pressure or air volume measurement for the BMS or PLC system The set point can be sentfrom the BMS via modbus The signals can be individually smoothed The control output can be fast but the measurement output can
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