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Technical Manual

Page 12

CODEL

Issue : B

Rev. : 1

Date : 11/07/22

Ref. : 100042

5.2.3. Connection Schedule J-Box configuration 2, (for AQM & TDU up to 200m apart)

Figure 10: J-Box Connection Schedule, Config 2

Figure 11 : Alternative J-box Connection Diagram

RS485

4

– 20mA

Mains power

48V DC

Junction Box

TDU

PSU

AQM

Transceiver

Heated mirror

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Содержание CODEL TunnelTech205

Страница 1: ...RATING MANUAL TunnelTech205 Tunnel Atmosphere Air Quality Monitor for NO2 CODEL International Ltd Unit 4 Station Road Bakewell Derbyshire DE45 1GE United Kingdom t 44 0 1629 814 351 f 44 0 8700 566 30...

Страница 2: ...Issue B Rev 1 Date 11 07 22 Ref 100042...

Страница 3: ...and service engineers will assist with any application problem to ensure that the best possible use is derived from investment in CODEL quality products If you require any further information about CO...

Страница 4: ...Technical Manual CODEL Issue B Rev 1 Date 11 07 22 Ref 100042...

Страница 5: ...splay Unit TDU 9 5 2 Connections 10 5 2 1 Connection schedule for AQM TDU up to 100m apart 10 5 2 2 Connection Schedule J Box configuration 1 for AQM TDU up to 1km apart 11 5 2 3 Connection Schedule J...

Страница 6: ...7 1 AQM NO2 29 7 1 1 Communications see also Appendix A for further information 29 7 1 2 Heater Control 29 7 1 3 Alignment 29 7 1 4 Gain Adjustment 29 7 1 5 Calibration NO2 30 8 Maintenance 31 8 1 Ge...

Страница 7: ...ed throughout these instructions and are intended to ensure your safety while carrying out installation operation and maintenance procedures Please read these instructions fully before proceeding Caut...

Страница 8: ...Technical Manual CODEL Issue B Rev 1 Date 11 07 22 Ref 100042...

Страница 9: ...measurement The CODEL sensor is a precision transmissometer which measures the attenuation of blue light by NO2 in the tunnel atmosphere The light source is a simple LED and the interfering effects o...

Страница 10: ...Technical Manual Page 2 CODEL Issue B Rev 1 Date 11 07 22 Ref 100042 Figure 1 System Arrangement...

Страница 11: ...m within a measurement cell into which only gases can diffuse The NO2 monitor utilises a Single Wavelength Optical Transmissometer SWOT technique 2 1 1 2 Measurement Elements An LED is employed as the...

Страница 12: ...ilters 2 1 1 4 Diagnostic Data Every second a complete measurement is determined for each of the detector levels and a refresh of the NO2 measured level is made Diagnostic data for each of the detecto...

Страница 13: ...1 Date 11 07 22 Ref 100042 Zero calibration may be configured to be activated Manually from the TDU keypad Automatically from the TDU clock up to 1 week intervals Remotely from the TDU logic input vol...

Страница 14: ...es selectable on set up Accuracy 40ppb Power 48V DC 36VA obtained from local data bus from TDU Communication local data bus Dimensions mm 180 x 1130mm see Figure 3 3 3 Tunnel Display Unit TDU Display...

Страница 15: ...cable between the AQM reflector and the junction box 1 x Junction box for each AQM to IP66 specification suitable for 6 core cables and complete with 3 x cable glands 2 x Mounting brackets per AQM 1 x...

Страница 16: ...st provided 5 1 1 NO2 Air Quality Monitor The NO2 monitor is secured horizontally to the tunnel wall using the brackets provided to support and clamp the measurement chamber The arrangement of the mon...

Страница 17: ...method of connection in relation to the separation distance see Figure 9 and Figure 11 Where the TDU AQM are separated by up to 500m then the 48V supply may be connected directly into the TDU using 1...

Страница 18: ...technician The following diagrams illustrate the connections for the equipment NOTE Only use the O P 3 and 4 1Amp outputs connections on the PSU 5 2 1 Connection schedule for AQM TDU up to 100m apart...

Страница 19: ...eater than 100m then it is necessary to use a junction box due to voltage drop over long cable distances 5 2 2 Connection Schedule J Box configuration 1 for AQM TDU up to 1km apart Figure 8 J Box Conn...

Страница 20: ...f 100042 5 2 3 Connection Schedule J Box configuration 2 for AQM TDU up to 200m apart Figure 10 J Box Connection Schedule Config 2 Figure 11 Alternative J box Connection Diagram RS485 4 20mA Mains pow...

Страница 21: ...Technical Manual Page 13 CODEL Issue B Rev 1 Date 11 07 22 Ref 100042 Figure 12 Power Supply Unit Mains fuse Mains input connection 48V DC outputs 48v output fuses 6 TDU Operation 1 4...

Страница 22: ...ted the calibration of the instrument is obtained at zero gas level 6 2 Normal Start Up Procedure Power up the system and leave it for two hours This allows time for the transceiver and reflector to h...

Страница 23: ...sing the MODE key will either take the instrument to the next mode of operation or back to the operating mode if pressed from within a mode Arrow Keys Pressing the ARROW keys will do one of two things...

Страница 24: ...mode is complex an extra program tree is illustrated Figure 14 Program Operation Tree 6 6 Operating Mode In this mode of operation displayed gas concentration may be observed When in this mode the dis...

Страница 25: ...ined here Protocol Displays the protocol selected for the serial communications output either Codel for connection to Codel s own software or MODBUS for connection to standard MODBUS system Baud Rate...

Страница 26: ...of the display the main display will show Not applicable 6 9 Diagnostic Mode Mode 4 The detector levels temperature data Y Z values NO2 values cal data and the fault condition may be examined from th...

Страница 27: ...m operation this parameter and the resulting raw gas calculation may be interrogated here Z is the Y value after the application of any necessary corrections s indicates that the smoothing filter has...

Страница 28: ...ition Dr Low the detector Dr is too low for correct operation Dt Low the detector Dt is too low for correct operation Dr High the detector Dr is too high for correct operation Dt High the detector Dt...

Страница 29: ...its span rolling average and fault condition Alarm 1 2 source and level set up Parameters the following are set from this mode security code comms I D protocol baud rate and clock Calibrate the zero c...

Страница 30: ...output is set up from this mode Press the ENTER key while this display is shown to select it then press the ARROW keys to step through the available options Press the ENTER key to enter each option a...

Страница 31: ...ressing the ARROW keys when the desired option is displayed press the ENTER key Set mA Output This is set at the factory and should not be altered without due consideration From this option the curren...

Страница 32: ...Technical Manual Page 24 CODEL Issue B Rev 1 Date 11 07 22 Ref 100042...

Страница 33: ...en Alarm 2 condition is reached the red LED on the TDU is unaffected Alarm relay 2 is energised with the alarm condition cleared Both alarm relays are fail safe in the event of a power outage of the N...

Страница 34: ...unications address identity number 6 10 6 Protocol This is used to select the required serial communication protocol ModBus for standard MODBUS CODEL for Codel s own diagnostic software 6 10 7 Baud Ra...

Страница 35: ...iated from here as follows Auto Cal Initiate Cal Timer Interval Cal Alarm Logic Logic Yes Next Cal Input Exit Exit No Exit o Initiate allows selection of automatic zero calibration operation o Cal Tim...

Страница 36: ...al Manual Page 28 CODEL Issue B Rev 1 Date 11 07 22 Ref 100042 o Logic Input NO option inhibited o Cal Alarm YES this will switch Alarm 1 relay when the calibration routine is in progress NO option in...

Страница 37: ...is required on site then final alignment is carried out by optimising the mechanical alignment of the sensor and reflector on the tube until the maximum signal is obtained 7 1 4 Gain Adjustment The d...

Страница 38: ...detector data are correct the sensor may be calibrated from the Calibration sub menu in the TDU set up mode Set the number of calibration cycles to 200 then calibrate The monitor will now calibrate t...

Страница 39: ...General The equipment is designed for low maintenance The sensors utilise the latest microprocessor technology and have no moving components they require no routine maintenance 8 2 Emergency Shutdown...

Страница 40: ...5 serial port in the TDU Figure 18 NO2 AQM system configuration 9 1 2 Processor Architecture Each NO2 sensor has two processors organised as a master slave pair In each case the master processor handl...

Страница 41: ...On this board is mounted a hexadecimal rotary switch for setting the address code Allowable addresses are in the range 1 to 8 and this is normally set to 1 at the factory The location of the address s...

Страница 42: ...ithout Junction Box 10 Figure 8 J Box Connection Schedule Config 1 11 Figure 9 Overall Connection Diagram 11 Figure 10 J Box Connection Schedule Config 2 12 Figure 11 Alternative Connection Diagram 12...

Страница 43: ...of 125 registers can be accessed per request The formats of the request and response frames are detailed below where X and n are hexadecimal variables An example of a MODBUS register map is shown bel...

Страница 44: ...AEG Modicon Modbus Protocol Reference Guide PI MBUS 300 Rev D Each register is defined to be 2 bytes wide Modbus Register Location 0070h NO2 Data 0001h 1ppb 0064h 100ppb Data Register Locations at COD...

Страница 45: ...Not Used 0073 Not Used 0074 Not Used 0075 Not Used 0076 Data Valid instantaneous XXXX logic XX00 valid else invalid XXXX 0077 Data Valid Calibration Status instantaneous XXXX logic 00XX data valid XX0...

Страница 46: ...Section page Description New Revision 17 03 22 Front cover Front cover update A6 23 05 22 YM request Front cover Title changed from Technical manual to Operating Manual A7 11 07 22 Pm741 6 9 1 analyse...

Страница 47: ...Technical Manual Page 39 CODEL Issue B Rev 1 Date 11 07 22 Ref 100042...

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