NRG Systems IceFree RT240 & NRG Systems RT20 Ultrasonic
Contents
1. Note that Wind Measurement Quality will not be available for aM2 only 9 values allowed It is available with the aC2 Sensor configured for measurement values in Imperial units Measurement value UMB Min Max Unit Channel Buffer 0 Wind Speed current 410 0 0 167 8 mph 44 rt240_and_rt20_manual docx Rev 2 6 June 2013 Wind Speed min 430 0 0 167 8 mph Wind Speed max 450 0 0 167 8 mph Wind Speed avg 470 0 0 167 8 mph Wind Speed vct 490 0 0 167 8 mph Buffer 1 Wind Direction current 500 0 0 359 9 Wind Direction min 520 0 0 359 9 Wind Direction max 540 0 0 359 9 Wind Direction vct 580 0 0 359 9 Buffer 2 Wind Measurement Quality 805 0 0 100 0 45 rt240_and_rt20_manual docx Rev 2 6 June 2013 15 1 4 3 Buffer Assignment for Additional Measurements M3 and C3 Barometric Pressure Group Sensor configured for measurement values in SI or Imperial units Measurement value UMB Min Max Unit Channel Buffer 0 Abs Barometric Pressure 300 300 1200 hPa current Abs Barometric Pressure 320 300 1200 hPa min Abs Barometric Pressure 340 300 1200 hPa max Abs Barometric Pressure 360 300 1200 hPa avg Buffer 1 Rel Barometric Pressure 305 300 1200 hPa current Rel Barometric Pressure 3252. 1 10 seconds adjustable 0 1 C 0 2 F 2 C 3 6 F can be affected by heat and sunlight 1 10 seconds adjustable 300 hPa to 1200 hPa 8 9 inHg to 35 4 inHg 1 5 hPa 0 04 inHg up to 32 devices 12 to 24VDC 10 50mA 1 2W 24VDC 10 10A maximum 240W maximum 140W 100W 8 pole plug Amphenol C091 31D008 101 2 Housing Material Pole Diameter Environmental Operating Temperature Protection up to 32 devices 12 to 24VDC 10 50mA 1 2W 24VDC 10 880mA maximum 21W 8 pole plug Amphenol C091 31D008 101 2 a aluminum 49 7 mm to 50 7 mm 1 957 inches to 1 966 inches 40 C to 60 C 40 F to 140 F IP65 rt240_and_rt20_manual docx To Place Your Order Contact NRG Sales 802 482 2255 or visit nrgsystems com polycarbonate 49 7 mm to 50 7 mm 1 957 inches to 1 966 inches 40 C to 60 C 40 F to 140 F 1P64 factory configured per customer specification NRG 110 Riggs Rd Hinesburg VT 05461 USA info nrgsystems com 56 Rev 2 SYSTEMS 6 June 2013 18 Documents of Conformity Global leader in wind measurement N Declaration of Conformity in accordance with ISO IEC 17050 1 2004 NRG Systems Document Number 6019 Rev A Supplier NRG Systems Supplier Address 110 Riggs Road Hinesburg VT 05461 USA Telephone 802 482 2255 Fax 802 482 2272 Email sales nrgsystems com Declares
3. lt ID gt Device address 2 decimal places with leading zeros lt value gt 1 10 seconds The current setting is delivered as the response if no entry is made for lt value gt Response I lt ID gt lt value gt CR 33 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 1 11 Scaling the wind speed Description This command is used to set the unit for wind speed Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt OS lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt O m s 1 km h 2 miles h 3 knots The current setting is delivered as the response if no entry is made for lt value gt Response lt ID gt lt value gt CR 14 1 12 Control line trigger property Description This command is used to set the trigger property when independent telegram transmission TT is enabled If when enabling the function the heater control mode is 3 or 4 heater control via control line the heating control setting automatically switches to 1 automatic mode Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt TG lt value gt CR lt ID gt D
4. 58 0 158 0 F Buffer 4 Rel Barometric Pressure 300 1200 hPa min Rel Barometric Pressure 300 1200 hPa max Rel Barometric Pressure 300 1200 hPa average 40 rt240_and_rt20_manual docx Rev 2 6 June 2013 15 1 3 3 Example Conversation Base Data Set Note The examples in the following sections use italics to represent the requests from the controller e g OV Example M Request Sl metric configuration OM 00008 lt CR gt lt LF gt 8 Values are available ODO 0 13 54 2 5 3 74 2 6 lt CR gt lt LF gt e Air temperature 13 5 C e Current wind speed 2 5m s e Max wind speed 3 7m s e Average wind speed 2 6m s OD1 0 136 4 134 0 100 0 1010 lt CR gt lt LF gt e Current wind direction 136 4 e Wind direction vector average 134 0 e Quality of wind measurement 100 e Current relative barometric pressure 1010 hPa Example C Request SI metric configuration 0c 000018 lt CR gt lt LF gt 18 Values available ODO 0 13 54 2 54 3 7 2 6 lt CR gt lt LF gt e Air temperature 13 5 C e Current wind speed 2 5m s e Maximum wind speed 3 7m s e Average wind speed 2 6m s OD1 0 136 4 134 0 100 0 1010 lt CR gt lt LF gt e Current wind direction 136 4 41 rt240_and_rt20_manual docx Rev 2 6 June 2013 e Wind direction vector average 134 0 e Quality of wind measurement 100 e Current relative barometric pressure 1010 hPa 0D2 0 1 8 2 8 122 0 147 0
5. C min Factor 10 signed 21 Virtual Air Temperature C max Factor 10 signed 22 Virtual Air Temperature C avg Factor 10 signed 23 Heating Temperature Top C Factor 10 signed 24 Heating Temperature Bottom C Factor 10 signed 25 Wind Speed m s act Factor 10 signed 26 Wind Speed m s min Factor 10 signed 27 Wind Speed m s max Factor 10 signed 28 Wind Speed m s avg Factor 10 signed 29 Wind Speed m s vct Factor 10 signed Frequent Measurements in Imperial Units Reg Range Scaling Addr signed unsigned remarks 30 Virtual Air Temperature F act Factor 10 signed 31 Virtual Air Temperature F min Factor 10 signed 32 Virtual Air Temperature F max Factor 10 signed 33 Virtual Air Temperature F avg Factor 10 signed 34 Heating Temperature Top F Factor 10 signed 35 Heating Temperature Bottom F Factor 10 signed 36 Wind Speed mph act Factor 10 signed 37 Wind Speed mph min Factor 10 signed 38 Wind Speed mph max Factor 10 signed 39 Wind Speed mph avg Factor 10 signed 40 Wind Speed mph vct Factor 10 signed Additional Measurements Reg Range Scaling Addr signed unsigned remarks 22 rt240_and_rt20_manual docx Rev 2 6 June 2013 41 Absolute Barometric Pressure Factor 10 signed kPa act 42 Absolute Barometric Pressure Factor 10 signed kPa min 43 Absolute Barometric Pressure Factor
6. Rel Barometric Pressure 300 1200 hPa current 38 rt240_and_rt20_manual docx Rev 2 6 June 2013 Buffer 2 Wind Speed min 0 0 75 0 m s Wind Speed vector average 0 0 75 0 m s Wind Direction min 0 0 359 9 j Wind Direction max 0 0 359 9 j Buffer 3 Air temperature min 50 0 70 0 C Air temperature max 50 0 70 0 C Air temperature average 50 0 70 0 C Buffer 4 Rel Barometric Pressure 300 1200 hPa min Rel Barometric Pressure 300 1200 hPa max Rel Barometric Pressure 300 1200 hPa average Imperial Units Measurement Value Min Max Unit Buffer 0 Air Temperature current 58 0 158 0 F Wind Speed current 0 0 167 8 Mph Wind Speed max 0 0 167 8 mph Wind Speed average 0 0 167 8 mph Buffer 1 Wind Direction current 0 0 359 9 8 39 rt240_and_rt20_manual docx Rev 2 6 June 2013 Wind Direction vector 0 0 359 9 K average Wind Quality 0 0 100 0 Rel Barometric Pressure 300 1200 hPa current Buffer 2 Wind Speed min 0 0 167 8 mph Wind Speed vector 0 0 167 8 mph average Wind Direction min 0 0 359 9 e Wind Direction max 0 0 359 9 S Buffer 3 Air temperature min 58 0 158 0 F Air temperature max 58 0 158 0 F Air temperature average
7. 2 Automatic Alternating RT240 only maximum 150W heating The top cover plate heater alternates with the base plate heater approximately 100W and 150W respectively Note When alternating if the set point temperature plus 5 C is not reached within 4 minutes power is switched to the other heater Command aXMn 51 rt240_and_rt20_manual docx Rev 2 6 June 2013 n Heating Mode 0 Off 1 Automatic 2 Automatic Alternating Response aXMnm lt CR gt lt LF gt n selected heating mode 0 off 1 automatic m alternation O continuous 1 alternating The assignment of an invalid heating mode will be answered with aXMf lt CR gt lt LF gt Setting an RT20 to Mode 2 is invalid Example An RT240 set to Automatic Alternating OXM2 OXM11 lt CR gt lt LF gt 52 rt240_and_rt20_manual docx Rev 2 6 June 2013 16 Appendix D Warranty Repairs 16 1 Two Year Limited Warranty NRG Systems Inc NRG warrants its products for a period of two years from the date of original purchase solely for the benefit of the original consumer purchaser If this NRG product is determined to be defective in materials or workmanship NRG will at NRG s option repair or replace this product without charge This warranty does not cover damage due to improper installation or use accident or misuse lightning or damages due to any unauthorized service This warranty also will not apply if any seal on any instrument or sensor is broken or
8. RS Triggers software reset TG Control line trigger property XX Switches to UMB binary protocol temporary Differentiation is made between 2 authorization levels when sampling Read only and Admin The settings for all parameters can be requested in both modes but can only be changed in Admin mode In Read only mode it is only possible to enable automatic telegram transmission and to trigger a software reset 25 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 1 3 Telegram request NMEA Description This command requests the NMEA telegram Request lt ID gt Response SWIMWV XXX X XX CR LF lt ID gt TR4 CR Device address 2 decimal places with leading zeros SWIMWYV xxx x R xxx x M A xx CR LF fix Wind direction fix Wind speed fix Possible values K N M S for km h Knots m s mph fix A valid value V invalid value Check sum identifier Check sum high byte first Carriage Return Line Feed Response in case of error Request lt ID gt Response SWIMWV JR lt ID gt TR4 CR Device address 2 decimal places with leading zeros SWIMWVYV R M V CR LF fix fix fix Possible values K N M S for km h Knots m s mph fix 26 rt240_and_rt20_manual docx Rev 2 6 June 2013 XX CR LF Example Request Response V invalid value Check sum identifier Check sum high byte first Carriage Return Line F
9. 2 Station Reset Writing the value 0x3247 12871d into register 2 will trigger a device reset reading always returns 0 Register 1 Details The RT240 has 2 heating elements to keep the sensor free of snow and ice One element is in the cover and the other is built into the casting around the ultrasonic sensors Control Modes The sensor s heating can be operated in 5 different modes rt240_and_rt20_manual docx Ox00 Heating always off 0x01 Automatic heating control o The heating switches on when the housing temperature falls below the setpoint and switches off when the housing temperature exceeds the setpoint by 5 C 0x02 The setpoint temperature is set to 40 C in this condition the heating switches on at room temperature for test purposes only 0x03 Heating is off when the control line Pin 3 Red wire is at the high level otherwise it is automatically controlled 19 Rev 2 6 June 2013 e 0x04 Heating is off when the control line Pin 3 Red wire is at the low level otherwise it is automatically controlled Heating Power The heating power can be set in accordance with the following modes e 0x00 Full heating capacity approximately 240W e 0x01 Alternating heating The top cover plate heater alternates with the base plate heater approximately 100W and 150W respectively Note When alternating if the setpoint temperature plus 5 C is not reached within 4 m
10. Identification Low Byte WS Typ 2 3 4 5 6 High Byte Software Version Device status Sensor status 1 Air temperature air temperature buffer barometric pressure barometric pressure buffer Sensor status 2 Wind wind buffer Reserved Reserved Reserved Reserved Reserved Diagnostics Scaling signed unsigned remarks Any value except 0 indicates an internal error Contact NRG Technical Support Coding 4 bit per status signed see details below Coding 4 bit per status signed see details below Number of seconds since the last reset divided by 10 Frequent Measurements with No Units or SI Metric Only Reg Range Scaling Addr signed unsigned remarks 10 Relative Barometric Pressure kPa Factor 10 signed act 11 Relative Barometric Pressure kPa Factor 10 signed min 12 Relative Barometric Pressure kPa Factor 10 signed max 13 Relative Barometric Pressure kPa Factor 10 signed avg 14 Wind Direction act Factor 10 signed 15 Wind Direction min Factor 10 signed 16 Wind Direction max Factor 10 signed 17 Wind Direction vct Factor 10 signed 18 Wind Measurement Quality Factor 1 signed rt240_and_rt20_manual docx 21 Rev 2 6 June 2013 Frequent Measurements in SI Metric Units Reg Range Scaling Addr signed unsigned remarks 19 Virtual Air Temperature C act Factor 10 signed 20 Virtual Air Temperature
11. 10 signed kPa max 44 Abs Barometric Pressure kPa Factor 10 signed avg 45 Wind Speed km h act Factor 10 signed 46 Wind Speed km h min Factor 10 signed 47 Wind Speed km h max Factor 10 signed 48 Wind Speed km h avg Factor 10 signed 49 Wind Speed km h vct Factor 10 signed 50 Wind Speed kts act Factor 10 signed 51 Wind Speed kts min Factor 10 signed 52 Wind Speed kts max Factor 10 signed 53 Wind Speed kts avg Factor 10 signed 54 Wind Speed kts vct Factor 10 signed 55 Reserved 124 Sensor Status Information Details Each register holds 4 sensor status codes at 4 bits per status The sequence of status values defined in the table above are in order from most significant half byte to least significant half byte Most of the sensors have two status values one for the sensor itself and the current measurement value another one for the buffer from which average minimum and maximum values are evaluated The following table shows the status coding Sensor State Code OK 0 INVALID_CHANNEL 1 Factory Use Only 2 MEAS_ERROR 3 MEAS_UNABLE Factory Use Only 4 VALUE_OVERFLOW 5 CHANNEL_OVERRANGE VALUE_UNDERFLOW CHANNEL_UNDERRANGE BUSY 6 Factory Use Only 7 23 rt240_and_rt20_manual docx Rev 2 6 June 2013 24 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 Appendix B Digital Communication NMEA 14 1 General Wind directio
12. C and 20 C This set point is part of the factory configuration based on customer specification Default is 5 C 3 Heater is disabled when the control line is at the high level otherwise it operates in the automatic mode Heater is disabled when the control line is at the low level otherwise it operates in the automatic mode 6 2 Heater Capacity The heater capacity on the RT240 must be selected Full capacity is the default selection for the RT240 The heater capacity on the RT20 is always 20W 1 Full capacity 240W 2 Alternating heating maximum 150W heating the top cover plate heater alternates with the base plate heater approximately 100W and 150W respectively Note When alternating if the set point temperature plus 5 C is not reached within 4 minutes power is switched to the other heater Note Many of the heater controls can also be set using certain digital communications protocols See the appropriate appendices for details 7 Connections There is an 8 pole screw connector on the underside of the RT240 and the RT20 This connects the supply voltage and interfaces via a connection cable yN When connecting the sensor and heater supply voltages the correct polarity must be strictly observed Reversed polarity will cause damage of the instrument In addition do not short the outputs to ground or each other Full Duplex Pin Assignment Pin Function Cable Color 1 Serial
13. Smith 1 30 11 ei e je 5983 C 3RD ANGLE PROJECTION nasa ceammarsricren 25 El rca ol sat a 1OF1 8 7 5 4 3 2 1 13 rt240_and_rt20_manual docx Rev 2 6 June 2013 10 Installation RT20 8 7 6 5 4 3 2 1 on THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF ups NRG SYSTEMS ANY REPRODUCTION IN PART OR WHOLE WITHOUT oy SECTION SATE APPROVED Z THE WRITTEN PERMSSION OF NRG SYSTEMS IS PROHIBITED Notes A _ intici Release 12 39 11 ges g B_ Remove Connector pin out 1 16 12 RPS 1 For conductor pin functions see the manual 2 Weight 0 83kg 1 83lbs D e S Q 18mm 709in 2150mm 5 9in amp lt 58 3mm n E 50mm 0 7 1 969in 028 e 1 H8 7mm 130mm 1 Kuel GE Sech 37mm 0 5 Lann 1 457in 020 TI Alignment Pin M3x5 SHCS Head diameter Kees reduced to DETAIL A 5mm Max connector and Cable SCALE 1 2 197in Sensor removed Must face the turbine rotor B sel Screw Flat Point for clarity 4 4mm Hex Sege Output Signal 180 UNLESS OTHERWISE SPECIFIED CAD GENERATED DRAWING UNLESS OTHERWISE SPECIFIED TOLERANCES a sem MANUALLY UPDATE N RG SYSTEMS BREAK ALL EDGES 010 INCHES rule xn oT f DETAIL D DO NOT SCALE eme SEE oe 6026_RT 20 Installation Drawing Assembly SCALE 1 1 VIEW SS l su EA naam SEIT eet 6026 B 38D ANCE PROJECTION A e JE a ae 10F1 8 7 5 4 3 14 rt240_and_rt20_manual docx Rev 2 6 June 2013 11 Analog Interfac
14. half and full duplex NMEA MODBUS UMB or SDI 12 or SDI 12 analog 4 20mA 0 10V analog 4 20mA 0 10V additional signals and output scaling available additional signals and output scaling available Wind Direction Measuring Range 0 to 359 9 0 to 359 9 Resolution 0 12 0 12 Accuracy lt 2 RMSE for wind speeds greater than 1 0 m s 2 2 mph lt 3 RMSE for wind speeds greater than 1 0 m s 2 2 mph Threshold 0 1 m s 0 22 mph 0 3 m s 0 67 mph Measurement Output Rate e 1 10 seconds adjustable 1 10 seconds adjustable Wind Speed Measuring Range 0 m s to 75 m s 0 mph to 167 8 mph 0 m s to 75 m s 0 mph to 167 8 mph Resolution 0 1 m s 0 22 mph 0 1 m s 0 22 mph Accuracy 0 2 m s 0 45 mph or 2 of reading RMS whichever is 0 3 m s 0 67 mph or 3 of reading RMS for wind speeds greater from 0 to 35 m s 0 to 78 3 mph whichever is greater 5 RMS for wind speeds greater than 35 m s 78 3 mph Threshold 0 1 m s 0 22 mph 0 3 m s 0 67 mph Measurement Output Rate Virtual Temperature Resolution Accuracy Measurement Output Rate Barometric Pressure Measuring Range Accuracy 1 10 seconds adjustable 0 1 C 0 2 F 2 C 3 6 F can be affected by heat and sunlight 1 10 seconds adjustable 300 hPa to 1200 hPa 8 9 inHg to 35 4 inHg 1 5 hPa 0 04 inHg Bus Operation Power Requirements Without Heating With Heating Connection
15. interface RXD pink 2 Serial interface TXD yellow 3 Control connection Red 4 Serial interface RXD Grey 5 Serial interface TXD Green 6 Analog ground Blue View on cable socket solder 7 Supply voltage White connection 8 Supply voltage Brown WN connection of the cable shield is different for the RT240 and RT20 Please see the Cable Shielding section below Pin assignment half duplex analog interface rt240_and_rt20_manual docx Rev 2 6 June 2013 Pin Function Cable Color 1 Analog interface A Pink 2 Serial interface RXD TXD Yellow 3 Not Used Red 4 Analog interface B Grey 5 Serial interface RXD TXD Green 6 Analog ground Blue 7 Supply voltage White 8 Supply voltage Brown WN connection of the cable shield is different for the RT240 and RT20 Please see the Cable Shielding section below Pin assignment SDI 12 interface Pin Function Cable Color 1 Not Used pink 2 SDI 12 Data B yellow 3 SDI 12 Activation red 4 Not Used grey 5 SDI 12 Ground A green 6 SDI 12 Data blue 7 Supply voltage white 8 Supply voltage brown AN The connection of the cable shield is different for the RT240 and RT20 Please see the Cable Shielding section below If the equipment is not connected correctly It may not function It may be permanently damaged The possibility of an electrica
16. is being operated in half duplex mode the following error will be reported Cyclic data telegrams because of half duplex mode not allowed 29 rt240_and_rt20_manual docx Rev 2 6 June 2013 Access mode Description This command is used to switch between Read only and Admin modes Controlling these modes is required when changing most sensor parameters using the NMEA protocol Request lt ID gt KY lt key gt CR lt ID gt Device address 2 decimal places with leading zeros lt key gt 0 Read only 4711 Admin It is only possible to set parameters in Admin Mode only The parameters are effective immediately after setting However they are only stored permanently in the sensor after quitting Admin Mode and returning to Read Only Mode Parameters that were changed in error but not yet saved by changing to Read Only Mode can be reset by briefly disconnecting the sensor from the power supply Response on change from Read only mode to Admin mode 100KYO4711 Setting rights gt ADMIN Save new configuration with idKYOO Response on change from Admin mode to Read only mode 100KYO0000 Setting rights gt READ ONLY Configuration saved 14 1 5 Duplex mode Description This command is used to switch between half and full duplex Note Switchover takes place immediately i e a suitable communication module must then be connected to the sensor If the switchover is made in error the previous setting can be restored by briefl
17. lt CR gt lt LF gt e Minimum wind speed 1 8m s e Wind speed vectpr average 2 8m s e Minimum wind direction 122 0 e Maximum wind direction 147 0 0D3 0 12 4 14 0 13 5 lt CR gt lt LF gt e Minimum air temperature 12 4 C e Maximum air temperature 14 0 C e Average air temperature 13 5 C 0D4 0 1008 1011 1009 lt CR gt lt LF gt e Minimum relative barometric pressure 1008 hPa e Maximum relative barometric pressure 1011 hPa e Average relative barometric pressure 1009 hPa 15 1 4 Additional Measurement Commands Using the Additional Measurement commands all RT240 and RT20 measurements are available in an SDI 12 environment aM1 aM3 aMC1 aMC3 M command with CRC aC1 aC3 aCC1 aCC3 C command with CRC The buffer assignment defined below typically uses the DO and D1 buffers only However in the case of the Wind group the C command will also fill the D2 buffer and transfer the Wind Quality Measurement value Note that using the M command the Wind Quality Measurement value is not available only 9 values allowed for the M command 42 rt240_and_rt20_manual docx Rev 2 6 June 2013 Note also that the measurement values are grouped according to their measurement types temperature wind pressure M1 C1 Temperature M 4 Values C 4 Values M2 C2 Wind M 9 Values C 10 Values M3 C3 Barometric Pressure M 8 Values C 8 Values 15 1 4 1 Buffer Assignment f
18. set 2 with CRC aRC3 Data request from continuous measurement data set 3 with CRC aRC4 Data request from continuous measurement data set 4 with CRC av Command verification Evaluate sensor status and heating temperatures data request with aDO aD1 aXU lt m u gt Selection of the unit system for SDI12 data aXH nnnn Adjust the local altitude for calculation of relative barometric pressure aXMn Select the heating mode of the device aXR Device Reset Note Due the applied measurement processes the RT240 and RT20 will always measure continuously unlike other sensors described in the SDI 12 document This causes some special properties The device does not need a Wakeup and does not have a sleep mode Therefore the reactions to Break signals and any related timings do not apply Data requested with M or C commands are always available immediately The device will always respond with a000n ora a000nn respectively The sensor will not send any service request and will ignore measurement abort signals The controller should request the data immediately If a new measurement becomes available between the M C command and the D command the buffers will be updated Once data reading begins the buffers will be locked M and C commands only differ in the number of values made available in the buffers in both cases up to the maximum permitted by the standard of 9 and 20 respecti
19. that the Product IceFree Ultrasonic Wind Sensors Including Model Numbers NRG IceFree Ultrasonic Wind Sensor Model RT 240 NRG IceFree Ultrasonic Wind Sensor Cable Item 5843 are in conformity with the requirements of the following standards Safety IEC 61010 1 Ed 2 0 b 2001 Safety requirements for electrical equipment for measurement control and laboratory use EMC 2004 108 EC Council Directive of 15 December 2004 on the approximation of the Laws of Member States relating to electromagnetic compatibility EN61326 1 2006 Class B Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Additional Information All circuits are extra low voltage ELV therefore standard 2006 95 EC the low voltage directive does not apply and This product complies with the requirements of 2004 108 EC and therefore The product is CE marked in accordance with 93 68 EEC Compliance to US FCC Part 15 Subpart A Class B is claimed based on compliant CISPR 22 Class B results The test documentation is on file with Mr R Paul Smith Mechanical Engineer Issued at Hinesburg VT USA 04 December 2012 Owen Clay Engineering Manager Tel 802 482 2255 Fax 802 482 2272 nfe orqgaystemscom 110 Riggs Road Hinesburg Vermont 05461 USA wwwnrgsystems com 57 rt240_and_rt20_manual docx Rev 2 6 June 2013 Global leader in wind measurement Declaration of Conformity in accordance with ISO IEC 1705
20. 0 9600 14400 19200 28800 57600 when entering SDI 12 mode the circuit is switched to conform to the standard s requirements Ranges Analog interface circuits A B A 0 or 4 20mA 0 or 2 10V 2 2000Hz B 0or 4 20mA 0 or 2 10V Resolution 16 bits Channels Adjustable Update rate 1 10 seconds Averaging Sample Count 1 60 measurements The RT240 and RT20 are configured at NRG Systems per customer specification rt240_and_rt20_manual docx Rev 2 6 June 2013 5 Measurement Outputs The analog measurement outputs are configured at the factory based on customer specification However when using digital communications all of the sensor s measurement capabilities are available If you are using an analog output such as 4 20mA 2 channels are available These 2 channels are typically used for wind speed and wind direction outputs but any of the available measurements can be routed to the analog outputs if needed The wind related measurements Wind Speed Wind Direction and Virtual Temperature as well as the Heating Temperature Sensor Body Temperature all share an update rate 1 10 seconds and averaging sample count 1 60 samples They cannot be set independently The wind related measurements also share the threshold setting which can be set as low as 0 1m s 0 22mph In wind below the threshold speed setting the sensor will report zero for speed and direction The Barometric Pressure measurement can be in
21. 0 1 2004 NRG Systems Document Number 6020 Rev A Supplier NRG Systems Supplier Address 110 Riggs Road Hinesburg VT 05461 USA Telephone 802 482 2255 Fax 802 482 2272 Email sales nrgsystems com Declares that the Product IceFree Ultrasonic Wind Sensors Including Model Numbers IceFree Ultrasonic Wind Sensor Model RT 20 IceFree Ultrasonic Wind Sensor Cable Item 5843 are in conformity with the requirements of the following standards Safety IEC 61010 1 Ed 2 0 b 2001 Safety requirements for electrical equipment for measurement control and laboratory use EMC 2004 108 EC Council Directive of 15 December 2004 on the approximation of the Laws of Member States relating to electromagnetic compatibility EN61326 1 2006 Class B Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Additional Information All circuits are extra low voltage ELV therefore standard 2006 95 EC the low voltage directive does not apply and This product complies with the requirements of 2004 108 EC and therefore The product is CE marked in accordance with 93 68 EEC Compliance to US FCC Part 15 Subpart A Class B is claimed based on compliant CISPR 22 Class B results The test documentation is on file with Mr R Paul Smith Mechanical Engineer Lhe Ce issued at Hinesburg VT USA D 04 January 2012 Owen Clay Engineering manager Tel 802 422 2255 Fax S02482 2272 nfe orgaystems
22. 2 6 June 2013 15 Appendix C Digital Communication SDI 12 The communication in the SDI 12 mode of the RT240 and RT20 conforms to the standard defined in SDI 12 A Serial Digital Interface Standard for Microprocessor Based Sensors Version 1 3 January 12 2009 The sensor may be operated in bus mode together with other SDI 12 sensors connected to one SDI master The master can be a data logger or turbine controller as appropriate hereafter referred to as the controller The implementation of the SDI 12 protocol includes all measurements of which the sensor is capable including the translation into different unit systems SI metric Imperial However for compatibility to older implementations of the SDI 12 standard the RT240 and RT20 also offer a reduced Base data set with the most common measurements 15 1 1 Preconditions for SDI 12 Operation For SDI 12 communications the control input pin 3 of the connector or the red wire must be tied to analog ground Pin 6 of the connector or the blue wire The baud rate is 1200 and the serial interface is half duplex 15 1 2 Command Set For details of the SDI 12 protocol please refer to the above mentioned standard document The following commands are available for the RT240 and RT20 Command Function 21 Address search Wildcard request one device only on bus al Request device active al Reque
23. 300 1200 hPa min Rel Barometric Pressure 345 300 1200 hPa max Rel Barometric Pressure 365 300 1200 hPa avg Example Request with an Additional Measurements M command SI units 0M2 00009 lt CR gt lt LF gt ODO 0 18 5 8 2 25 2 20 5 17 2 lt CR gt lt LF gt e Current Wind Speed 18 5m s 46 rt240_and_rt20_manual docx Rev 2 6 June 2013 e Minimum Wind Speed 8 2m s e Maximum Wind Speed 25 2m s e Average Wind Speed 20 5m s e Vector Average Wind Speed 17 2m s OD1 0 180 2 178 5 182 5 180 6 lt CR gt lt LF gt e Current wind direction 180 2 e Minimum wind direction 178 5 e Maximum wind direction 182 5 e Wind direction vector average 180 6 Example Request with an Additional Measurements C command SI units 0C2 00010 lt CR gt lt LF gt ODO 0 18 5 8 2 25 2 20 5 17 2 lt CR gt lt LF gt e Current Wind Speed 18 5m s e Minimum Wind Speed 8 2m s e Maximum Wind Speed 25 2m s e Average Wind Speed 20 5m s e Vector Average Wind Speed 17 2m s OD1 0 180 2 178 5 182 5 180 6 lt CR gt lt LF gt e Current wind direction 180 2 e Minimum wind direction 178 5 e Maximum wind direction 182 5 e Wind direction vector average 180 6 0D2 0 95 lt CR gt lt LF gt e Wind Measurement Quality 95 47 rt240_and_rt20_manual docx Rev 2 6 June 2013 Device Identification Command The device responds t
24. 85 Interface 12 1 Fault Description Table Digital only 16 13 Appendix A Digital Communication MODBUS ccesccssenseeeeeseeeeeeeeaseeeeeneeaseeeneeesaseeeaseesaseeenseesaseeeeeeesaseeeneees 18 13 1 1 MODBUS Communication Parameters c cceccceesceeeseeeeeeeeeeeeeeeeeeeeeeaeeeeaeeseaeeseaeeseaeeseaeessaeeseeeseneeeaes 18 131 2 Address BEE 18 13 1 3 MODBUS FUNCtIONS ic daa atada 18 14 Appendix B Digital Communication NMEA onnnnnccnnnicnnnnnneccnncrc crecen 25 nn IA 25 WAAAY SU e EE 25 14 12 Summar ot NMEA COMMANAS isaac tig 25 14 13 Telegram HEET EE 26 14 1 4 Independent telegram transmission NMEA AA 28 3 rt240_and_rt20_manual docx Rev 2 6 June 2013 Acoso MM A ios 30 14 1 5 Duplex Mode sii ias 30 141 6 Heating duty iaa A AA Eg 31 E SS ole Dune EE 32 14 18 Device EE 32 14 19 Measurement Interval icon di aaron 33 14 11 10 Outputinterval accord dd Arba 33 EN bah Scaling the Wind Speed RE 34 14 1 12 Control line trigger property 0 2 eee eeeceeeseeeeseeeeeeeeeseeeeseeseaeeeeaeeseaeeseaeeseaeeseaeeseaeeseaeeseaeeseaeeseaeessaeeseeeeaes 34 LATAS Software resets ashi ee eh ae eee ie leah ch Aik Roe ae hei kha 35 141147 CRE Caleulation EE 35 15 Appendix C Digital Communication SDI 12 ccccseeeeeeeeseeeeeeeenseeeeeeeenseneeeneeaseeeeeeeeaseeeaseesaseeeeseeeaseeeeeeesaseeeneees 36 15 1 1 Preconditions for SDI 12 Operation oconcccinnccinnccnonccnoncnnocnnnoncnnnnc
25. Buffers 0 and 1 of the Base Data Set Buffers 2 3 and 4 contain several more though not all of the measurements generated by the sensor These additional values are available on request by C commands This definition guarantees the compatibility to controllers designed according to older versions of the SDI 12 standard The complete range of measurement values produced by the sensor though not both SI and Imperial is available in the SDI 12 environment through the Additional Measurements M and C commands aM 1 aM3 aMC1 aMC3 aC1 aC3 aCC1 aCC3 See the Additional Measurement commands section and its buffer structures below If the measurement value is not available for some reason e g sensor failure this is indicated by a value of 999 0 or 999 9 The controller can then evaluate the reason for failure by an aV verification request The following tables show the measurement values in the sequence they are arranged in the telegram see example below 15 1 3 2 Buffer Assignment Base Data Set SI Metric units Measurement value Min Max Unit Buffer 0 Air temperature current 50 0 70 0 C Wind Speed current 0 0 75 0 m s Wind Speed max 0 0 75 0 m s Wind Speed average 0 0 75 0 m s Buffer 1 Wind Direction current 0 0 359 9 R Wind Direction vector 0 0 359 9 average Wind Quality 0 0 100 0
26. NRG Systems IceFree RT240 amp NRG Systems RT20 Ultrasonic Wind Sensor Part number 5747 and 5749 User Manual 110 Riggs Road Hinesburg VT 05461 USA TEL 802 482 2255 FAX 802 482 2272 EMAIL sales nrgsystems com www nrgsystems com Specifications are subject to change without notice NRG Systems Inc 110 Riggs Road Hinesburg VT 05461 Tel 802 482 2255 Fax 802 482 2272 e mail sales nrgsystems com rt240_and_rt20_manual docx Rev 2 6 June 2013 1 Using this Manual Read this manual completely before installing and operating the sensor Follow all instructions and recommendations closely 1 1 Symbols This document and the sensor may use the following symbols 1 A luces Earth Ground bel AA Chassis Ground AC Voltage AC or DC Voltage Lal DC Voltage EN Hot Surface PN nin This typeface within the body of the manual is used for general descriptions and instructions to the user This typeface is used to warn users of a potential danger either to them or to the sensor 1 2 Abbreviations Abbreviations are used throughout this manual and are defined as follows act Most Recent Measurement min Minimum Value max Maximum Value avg Average Value vct Vectorial Average Value rt240_and_rt20_manual docx Rev 2 6 June 2013 2 Table of Contents Contents 1 Using this AEN 2 Ml Symbol tia ira al 2 1 27 ee Me ta as 2 2 Table CONS ana 3 3 Theory Of Operation gd 5 31 Wi
27. arometric pressure 300 0 1200 0 hPa Relative barometric pressure 300 0 1200 0 hPa 5 6 Wind Measurement Quality Units e Range Measurement Variable Unit ENEE The Wind Measurement Quality value allows the user to assess how well the measurement system is functioning Under normal circumstances the value is 90 100 however values as low as 50 do not represent a general problem If the value falls to zero the measurement system is not working properly there may be debris on the sensor for example When a value of 0 is reached the error value is transmitted for wind speed and wind direction 55hex 85decimal for digital channels and a user defined error level for analog signals meaning that the sensor is unable to execute valid measurement due to incompatible ambient conditions 6 Heater operation The heating system on the RT240 consists of two separate heaters to keep the sensor free of ice and snow The heater elements are located in the upper and lower housings The RT20 has one heating element in the lower half for prolonged operation during winter conditions As part of the configuration process the heater control mode and heater capacity is set at the factory based on customer specification 6 1 Heater Modes 1 Heater off rt240_and_rt20_manual docx Rev 2 6 June 2013 2 Automatic Heater Control The heater switches on when the housing temperature falls below a set point adjustable between 2
28. com 110 Riggs Road Hinesburg Vermont 06461 USA weanaunegsystems com 58 rt240_and_rt20_manual docx Rev 2 6 June 2013 19 Key Word Index A Ail AAA 23 B Barometric Pressures iii EEN 5 8 21 23 COMECON Sitios E RATAS NAAA CRC Calculation del Gs Cable Shielding cocida ai D default Settings iii a 15 Document Of Conformity 57 O eae ev aS 8 9 15 Interface Installation cccccssccccssscccssseceesssecceseeccesseecessseeeesseeecesseeeessseeees M M intendh sess ckdececacaea sesanggeaen A EEES ao EE aE 12 MODUS ee a a e a r S 6 rt240_and_rt20_manual docx Rev 2 59 de III 18 19 Most Recent Measurement cooooooccccccnnonononcnononananencnnnononanenancnnnnnanananane 5 N NIE E E E eerie cia cad 6 16 R Rep UE 53 54 S S Supply Voltage SDE cocos Specifications T Letpnpertatute ii 7 8 15 22 23 U Update ratede neryo ei Ad 5 V Virtual Temperaturas 5 Ww Warranty idee ieie eer Ee geed 53 Wind Dire CO Mirror cn N EA co aaa 7 21 22 Wind Speed EE 7 22 23 24 6 June 2013
29. contact to grounded structures 7 2 2 RT20 Because of the plastic body on the RT20 the cable shield must be connected to ground at the controller end This provides shielding against capacitively electrostatically coupled interference with the sensor signal There is no shield to ground connection at the sensor end of the cable 7 3 Additional Lightning Protection Recommendations The long term reliability and the Electromagnetic Compatibility EMC performance of the sensor are dependent on proper installation and connections These recommendations could apply to any control electronics or sensors but are particularly critical for wind sensors because they are exposed on the top of the nacelle 1 IEC 61400 24 classifies several Lightning Protection Zones LPZ LPZ O is exposed on the surface of the turbine and is subject to direct lightning attachment The turbine must provide air terminals such as lightning rods to protect the sensors from direct lightning attachment This creates an area in LPZ Ogto mount the sensors 2 Careful routing of the lightning down conductor and coordination of the grounding and bonding of the down conductor s to the turbine s LPS is required to minimize the energy coupled into other systems such as the sensors Provide maximum possible spacing between lightning down conductors and any control cabling or raceway Do not route any other cabling or raceway alongside the lightning down conductors These measures wil
30. dependently set to average over 1 to 10minutes When using digital communications the units for each measurement can be selected as shown below For analog outputs the signals are scaled independently of units 5 1 Wind Speed Units m s km h mph kts Measuring Range Measurement Variable min Max Unit Wind Speed 0 75 0 m s Wind Speed o 270 0 kmh Wind Speed 0 167 8 Mph Wind Speed 0 145 8 Kts 5 2 Wind Direction Unit S Measuring Range Measurement Variable min Max Unit Wind Direction 0 359 9 F The minimum maximum wind direction indicates the direction at which the minimum maximum wind speed was measured 5 3 Virtual Air Temperature Units C F Measuring Range Measurement Variable Min max Unit Virtual air temperature 50 0 70 0 C Virtual air temperature 58 0 158 0 F 5 4 Heating Temperature Units C F rt240_and_rt20_manual docx Rev 2 6 June 2013 Measuring Range Measurement Variable Min max unit Heating temperature top 50 0 150 0 C Heating temperature bottom 50 0 150 0 C Heating temperature top 58 0 302 0 F Heating temperature bottom 58 0 302 0 F Note On the RT20 only the bottom temperature is available 5 5 Barometric Pressure Sampling rate 10 seconds Generation of average value 1to 10 minutes Units hPa Measuring Range Measurement Variable Min max unit Absolute b
31. e Circuits Two analog interface circuits are provided for analog data transmission Interface A and Interface B Interface A can be configured for 0 to 20mA current output typically 4 to 20mA O to 10V voltage output as well as for frequency output in the range from 2 to 2000Hz with adjustable voltage level up to 10V Interface B can be configured the same as with Interface A except that no frequency option is available The scaling of the outputs is determined by the configuration of the sensor Please work with NRG to properly define the correct scaling for your application Note If the RT240 or RT20 is configured for any full duplex serial communications protocols it is not possible to use the analog outputs The maximum load impedance on the current outputs is 500 2 The minimum load impedance on the voltage outputs is 50002 The default settings for the RT240 and RT20 are below Update Rate 1 to 10 seconds default 1 second Averaging Sample Count 1 to 60 default 1 Threshold default 0 1m s Heater Mode default automatic Heater Temperature Set point default 5 degrees C Heater Power Level default 240W for the RT240 and 20W for the RT20 AE E eg Analog Interface settings 1 Interface A Wind speed default 4mA O m s and 20mA 75m S Error output default 2mA 2 Interface B Wind direction default 4mA 0 and 20mA 359 9 Error output default 2mA 15 rt240_and_rt20_ma
32. eed 01TR4 SWIMWV 230 6 R 003 4 N A 23 This means that the wind is coming at a speed of 3 4 knots from 230 6 27 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 1 4 Independent telegram transmission NMEA Description This command is used to disable enable independent transmission of the NMEA telegram Independent transmission can be enabled in full duplex mode only Response lt ID gt TT lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt 0 disabled 4 enabled The current setting is delivered as the response if no entry is made for lt value gt Response SWIMWV xxx x R xxx x M A xx CR LF every 1 10 seconds depending on OR SWIMWV fix XXX X Wind direction UR fix XXX X Wind speed fix M Possible values K N M S for km h Knots m s mph fix A A valid value V invalid value S Check sum identifier XX Check sum high byte first CR Carriage Return LF Line Feed Response in case of error Request lt ID gt TT lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt 0 disabled 4 enabled Response SWIMWVYV R M V CR LF 28 rt240_and_rt20_manual docx Rev 2 6 June 2013 SWIMWV JR XX CR LF fix fix fix Possible values K N M S for km h Knots m s mph fix V invalid value Check sum identifier Check sum high byte first Carriage Return Line Feed Note If the sensor
33. emented as far as they are applicable for RT240 i e all functions working on register level Conformance Class 0 0x03 Read Holding Registers Selected configuration settings 0x16 Write Multiple Registers Selected configuration settings Conformance Class 1 0x04 Read Input Registers Measurement values and status information 0x06 Write Single Register Selected configuration settings 0x07 Read Exception Status Currently not used returns 0 Diagnostics 0x11 Report Slave ID replies to broadcast address as well 18 rt240_and_rt20_manual docx Rev 2 6 June 2013 13 1 3 1 Holding Registers The Holding Registers are used to make a limited set of adjustable sensor parameters available using MODBUS communication these registers have been preset at the factory Similar to the measurements values are mapped to 16 bit integer values if necessary by appropriate scaling Use Function 0x03 to Read the Holding Registers and Functions 0x06 Write and 0x16 Write Multiple to change the values in the Holding Registers The values are checked for plausibility Improper values will not be accepted and cause a MODBUS exception Reg Function Values Scale Addr 0 Local Altitude Altitude in m for calculation of relative 1 0 barometric pressure Value range 100 5000 1 Heating operating High Byte Heating Operating Mode mode Low Byte Heating Power Mode See below for details
34. er about 10 seconds Device transmits error value 50h Device is being operated above the specified 80d measuring range e g above 75m s Device transmits error value 51h Device is being operated below the specified 81d measuring range Device transmits error value 55h Device unable to carry out valid measurement due 85d for wind speed or direction to unfavorable ambient conditions 16 rt240_and_rt20_manual docx Rev 2 6 June 2013 measurement There may be several causes for this Device is being operated above the specified measuring range Very strong horizontal rain or snowfall There are foreign objects in the measuring section of the sensor Ultrasonic sensors are heavily soiled gt clean sensors Ultrasonic sensors are iced up gt verify heating function and or the connection voltage of power supply One or more of the ultrasonic sensors is faulty gt return the sensor to NRG for repair The quality of the wind measurement is not always 100 The device should always transmit 90 100 in normal operation Values as low as 50 do not represent a general problem When error value 55h 85d is transmitted this value is 0 The device may be faulty if after cleaning it permanently transmits values below 50 Device transmits an error value not listed here There may be several reasons for this behavior gt contact NRG Technical Support Minimum value of wind direction i
35. evice address 2 decimal places with leading zeros lt value gt 0 Disabled 1 Telegram transmission triggered on rising edge of control voltage 2 Telegram transmission triggered on falling edge of control voltage 3 Telegram transmission while control voltage is high 4 Telegram transmission while control voltage is low The current setting is delivered as the response if no entry is made for lt value gt Response lt ID gt lt value gt CR 34 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 1 13 Software reset Description This command is used to trigger a software reset Request lt ID gt RS1 CR lt ID gt Device address 2 decimal places with leading zeros Response I lt ID gt lt value gt CR As with startup after a reset the sensor will report the following ultrasonic metal wind sensor Serial No 1011 061 Firmware 1 6 System ID 00 Serial COM 2 wire 14 1 14 CRC Calculation The CRC is calculated in accordance with the following rule The check sum is a running exclusive or XOR of all characters of the telegram left to right including the separators but excluding and The hexadecimal value of the upper and lower 4 bits of the result are converted into two ASCII characters 0 9 A F for transmission The high byte is transmitted first Further information on the description of a CRC calculation is available in the NMEA 0183 protocol 35 rt240_and_rt20_manual docx Rev
36. inutes power is switched to the other heater 13 1 3 2 Input Registers Use Function 0x04 to read the Input Registers which contain the measurement values of the sensor and the related status information The measurement values are mapped to the 16bit registers using scaling factors 0 65530 for unsigned values Note this is not 65535 32762 32762 for signed values Note this is not 32767 The values 65535 OxFFFF and 32767 Ox7FFF respectively are used for the indication of erroneous values or measurement values that are not available More details about the error can be evaluated from the status registers The assignment of values to the available register addresses 0 124 has been arranged in a way so that the user can read the most frequently used data with few ideally only one register block requests The following blocks have been defined Status information Frequently used values which do not have alternative units no units or SI only Frequently used values in SI metric units Frequently used values in Imperial US units Other measurement values When using the SI metric unit system the first three blocks can supply all data usually required with one request For detailed information about measurement ranges units etc please refer to the description of the channels earlier in the manual 20 rt240_and_rt20_manual docx Rev 2 6 June 2013 Status information Reg Addr oO ON O Om fF Range
37. l minimize the coupling of lightning electromagnetic pulse LEMP energy into other turbine systems 3 The mounting mast must be metal Take particular care to bond the sensor mounting mast to the turbine s LPS in coordination with the placement and bonding of the lightning air terminals and bonding of the turbine frame and nacelle 4 Use shielded or screened cable with high shield coverage for sensor cabling 5 Run the sensor cabling in metallic raceway or conduit Bond the raceway or conduit to the LPS at both ends This provides protection for the sensor and cabling against EMI and LEMP The purpose of recommendations 1 through 5 is to provide shielding of the internal sensor electronics heater and cabling so that they are protected to LPZ 1 per IEC 61400 24 Recommendations 6 and 7 relate to ground loops and over voltage protection 6 Provide sufficient bonding to prevent ground loop currents in the shields and raceways Whenever possible it is better to resolve the underlying grounding problems rather than leaving the shield unconnected to prevent ground loop current flow 11 rt240_and_rt20_manual docx Rev 2 6 June 2013 7 Since the sensor s electronics and cabling are in LPZ 1 isolation and or over voltage protection should be provided at the interface between the sensor cabling and turbine control system to provide LPZ 2 or better protection for the controller 8 Maintenance and Troubleshooting The sensor is essential
38. l shock may exist under certain circumstances 7 1 Supply Voltage The supply voltage for both the RT240 and RT20 is 24V DC 10 The power supply used must be approved for operation with equipment of protection class III SELV 7 2 Cable Shielding Important The user must correctly connect the shield of the signal cabling in accordance with the overall design of the lightning protection and grounding system for each turbine design The RT240 and RT20 are significantly different from each other in this respect as described below 10 rt240_and_rt20_manual docx Rev 2 6 June 2013 7 2 1 RT240 For the RT240 the cable shield is connected to the sensor the connector body is connected to the shield and the sensor body Assuming that the mounting post is metal and appropriately grounded this provides shielding against capacitively electrostatically coupled interference with the sensor signal If the cable shield can also be connected to ground at the controller end of the cable the shield can also provide protection against inductive magnetically coupled noise sources such as generator noise and lightning electromagnetic pulses However the shield should be connected at the controller end ONLY if the turbine grounding system provides sufficient bonding and grounding to prevent ground loop currents in the shield wire If the controller end of the shield is not to be connected make sure to cut and insulate the shield end to prevent accidental
39. ly maintenance free However it is recommended to visually inspect the surface of the transceivers for soiling annually or if a problem is suspected 12 rt240_and_rt20_manual docx Rev 2 6 June 2013 9 Installation RT240 8 7 6 5 4 3 2 1 ME INFORMATION CONTAINED IN THIS DRAWING I THE SOLE PROPERTY OF adi NRG SYSTEMS ANY REPRODUCTION IN PART OR WHOLE WITHOUT ka mice BIE EE 2 THE WRITTEN PERMISSION OF NRG SYSTEMS IS PROHIBITED Notes A Intiol Release 11 3011 RPS e 8 Added weight data made drawing exclusive to RT 240 11 30 11 RPS _ Removed Connector detal view and added red top 1152 pm 1 For conductor pin functions see the manual 2 Weight 1 63kg 3 59lbs 18mm r Es Kisel ma c os A H151mm Din 58 3mm 5 9in 2 295in oo H50mmto 7 H8 7mm 1 969in 028 c 34in 130mm 170mm 5 i Ti 6 7in An of post 37mmt0 5 L o 25mm a Ree 1 457in 020 1 f p Alignment Pin 4 M3x5 SHCS N Head diameter Connector and Cable Se Details reduced to DETAIL A 5mm Max SCALE 1 2 197in e Sensor removed Must face the turbine rotor B Set Screw Flat Point for clarity 4X 4mm Hex A pe e Output Signal 180 UNLESS OTHERWISE SPECIFIED CAD GENERATED DRAWING i UNLESS OTHERWISE SPECIFIED TOLERANCES ES gg MANUALLY UPDATE NRG SYSTEMS BREAK ALL EDGES 010 INCHES OTS WENN DETAIL D DO NOT ENE DRANG See 5983_RT 240 Installation Drawing Assembly SCALE 121 i Fe T x R Paul
40. manual docx Rev 2 6 June 2013 Buffer 1 device configured for SI metric units Measurement value min max Unit Heating temperature top 50 150 C Heating temperature bottom 50 150 GE Buffer 1 device configured for Imperial US units Heating temperature top 58 302 F Heating temperature bottom 58 302 F Since the RT20 only has a bottom heater the second heater temperature value is undefined Sensor status codes Sensor status Code OK 0 UNGLTG_KANAL 1 E2_CAL_ERROR 2 E2_CRC_KAL_ERR FLASH_CRC_ERR FLASH_WRITE_ERR FLASH_FLOAT_ERR MEAS_ERROR 3 MEAS_UNABLE 4 INIT_ERROR 5 VALUE_OVERFLOW 6 CHANNEL_OVERRANGE VALUE_UNDERFLOW 7 CHANNEL_UNDERRANGE BUSY 8 other sensor status 9 Example SDI 12 Address 0 49 rt240_and_rt20_manual docx Rev 2 6 June 2013 Ov 00004 lt CR gt lt LF gt ODO 0 0000 00 lt CR gt lt LF gt OD1 0 73 0 65 3 lt CR gt lt LF gt e No errors e Temperature of the top 73 0 e Temperature of the bottom 65 3 Example SDI 12 Address 0 ov 00004 lt CR gt lt LF gt ODO 0 0300 00 lt CR gt lt LF gt OD1 0 73 0 65 3 lt CR gt lt LF gt e air temperature buffer measurement error e Temperature of the top 73 0 e Temperature of the bottom 65 3 15 1 6 Measurement Unit System Selection Command The command is used to change the unit
41. n and wind speed in accordance with NMEA protocol can be requested via the NMEA protocol It can also be used to control heating modes communication parameters and measurement scaling The RT240 and RT20 implement the NMEA 0183 version While the NMEA standard specifies a baud rate of 4800 the RT240 and RT20 can operate at a wide range of speeds The device will not respond to unrecognizable NMEA commands Note The use of a binary protocol MODBUS UMB is recommended for lengthy transmission routes e g network GPRS UMTS as NMEA protocol is unable to detect transmission errors not CRC secured In the NMEA protocol it is possible to control the telegram output by means of the control line when using full duplex operation 14 1 1 Structure An NMEA command is initiated by the ID and concluded with the CR sign ODh Note that there is no lt LF gt character after commands Sending a lt LF gt after the lt CR gt can cause data corruption since the sensor responds immediately after receiving the lt CR gt and may step on the lt LF gt Characters that represent an ASCII value are in ordinary quotes 14 1 2 Summary of NMEA commands Command Function TR Telegram request TT Independent telegram transmission KY Access mode read only admin DM Duplex mode HP Heating duty HT Heating mode ID Device ID MD Measurement interval OR Output interval OS Scaling of wind speed
42. nd You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt 1D lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt New ID The current setting is delivered as the response if no entry is made for lt value gt 32 rt240_and_rt20_manual docx Rev 2 6 June 2013 Response I lt ID gt lt value gt CR Note lt value gt will be padded with 4 leading zeros 14 1 9 Measurement interval Description This command is used to set the measurement interval update rate Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt MD lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt 1 10 seconds The current setting is delivered as the response if no entry is made for lt value gt Response I lt ID gt lt value gt CR 14 1 10 Output interval Description This command is used to set the time interval for telegram transmission when independent telegram transmission TT is enabled Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt OR lt value gt CR
43. nd Speed and Direction citas daa eee ead ain ee ee dE 5 3 2 Virtual Temperature Barometric Pressure 5 3 3 Measurement DeninittOnss a a ica A a ches ig cadabeceacueesadesdateagbechevad a aaar ae a cap4usdsidgasenzecpaasibates 5 3 3 1 Most Recent Measurement act ccesenceceseeceeesseneeeeseneeseseeeesesseneneneneeseeecesesseaeneseeeeeseseneeseneesenenaes 5 3 3 2 Minimum Maximum and Average Values Min Max and avg ccccccccnnonococcnocccananannncnnnnnnnnnnnnncnnnncnnnnnnnnes 5 3 3 3 Vectorial Aver ge Valle Vaina a 5 Introducir ia 5 Measurement Outputs inercia a ii 7 A ll AT DEE 7 5 2 Wind DirectiO Mai a ina 7 5 3 Mirtual Alr ue CEET 7 5 4 Heating Temperature vicio A dada a a 7 5 5 Barometric Press estilista dal ida 8 5 6 Wind MeasurementQuUaliY vial iio 8 6 Heater OperatiON oommnccnoninccnnnnaceninncnn crac cnn nacen RRE 8 Gill Heater Modest e iS te beds 8 E A EE 9 TA GOMMEOCTIONS iii A a 9 Ll Supply VA tae oN ls os ea Mates sade abet ss eel E hee cos 10 7 2 CablevShielding Important ste stoi tee Sedat eae Seapets ee oes ett leds a aol T 10 7 2 1 RU 240 veces eet etn geben SA dive a ei Min bi ats 11 7 2 2 AT 22 sathet n te eA Aoi ay 11 7 3 Additional Lightning Protection Hecommendaions AA 11 8 Maintenance and Troubleshooting ommcccinniccninncnncccerancrcn rr 12 9 Installation VE EEN 13 10 Installation RT20 n ide 14 11 Analog Interface Circuits ccoo e e ll e e 15 12 Digital RS4
44. nnnncnnnn cn nan cnn cnn rra 36 154 2 ee ul En E EE 36 15 1 3 Measurement and Sensor Settings Data Messages cooccinoccconccconccononcnnnncnonncnnnccnnnn cnn cnn a ncnn nn nr 37 15 1 4 Additional Measurement Commandes AA 42 Device Identification Commande 48 151 5 Verification Commands ui tes 48 15 1 6 Measurement Unit System Selection Commande 50 15 1 7 Message Adjustment of the Altitude ooonciconnnoccnnnnccconnssrcnnrnncennnn coronan nc ncn eran recen 51 15 1 8 Get Heating Mode Command AAA 51 16 Appendix D Warranty RepalilS oonnmmmnnicccnnnncnnanncrnrcnrr rc 53 16 1 Two Year Limited War iii 53 16 2 Return Instructions KIC 54 Ke EE 56 18 Documents of Conformity diia 57 19 Key Word Index virna pai iaieineea asarana cercano racer 59 4 rt240_and_rt20_manual docx Rev 2 6 June 2013 3 Theory of Operation 3 1 Wind Speed and Direction The NRG ultrasonic wind sensor is constructed with four ultrasonic transceivers which can both transmit and receive ultrasonic sound waves The transceivers operate in pairs to send sound pulses from one to the other bouncing the signal off the ceiling of the sensor and measuring the time of flight over the fixed distance By performing four of these measurements in four mutually perpendicular directions the wind speed and wind direction can be calculated 3 2 Virtual Temperature Barometric Pressure While the NRG Ultrasonic Wind Sensor cannot directly measure the temperatu
45. nual docx Rev 2 6 June 2013 12 Digital RS485 Interface The equipment has an electrically isolated RS485 interface for measurement polling and sensor control The RS485 interface can operate in half or full duplex mode 2 or 4 wire connection The following operating restrictions exist depending on the half or full duplex operation setting Full duplex Half duplex Autonomous telegram transmission is No autonomous telegram transmission possible possible Transmission of values via current voltage Transmission of values via current voltage or frequency output is not possible or frequency output is possible Heating control via control pin is possible Heating control via control pin is possible Triggering of NMEA telegram transmission Triggering of NMEA telegram transmission over Control PIN is possible over Control PIN is not possible SDI 12 Mode overrides the duplex setting SDI 12 Mode overrides the duplex setting Please see Appendices A through C for detailed descriptions of each protocol 12 1Fault Description Table Digital only Fault Description Cause Remedy The device does not allow polling Check supply voltage or does not respond Check interface connection Incorrect device ID gt check ID devices are delivered with ID 1 Device transmits error value 28h Device is in initialization phase after start up gt 40d device delivers measurement values aft
46. o the identification request with following message example for SDI 12 device address 0 OT 013Lufft deVentusy00 y Metric US units m SI metric u Imperial US i e for an RT240 or RT20 configured for Imperial units OI 013Lufft deVentusu00 15 1 5 Verification Command The verification command aV is used to evaluate the status information of the sensor The sensor responds with a0004 lt CR lt LF gt i e 4 values are available in the buffers The first two measurement values transmitted in buffer 0 contain the status information of the measurement channels The last two values transmitted in buffer 1 show the temperatures of the upper and the lower portions of the sensor The status data of the channels are arranged into two fake measurement values in Buffer 0 four digits for the first status group and two for the second status group each digit representing one status value This organization is shown in the table below followed by the table of sensor status codes Note Generally each sensor has two status values one for the current measurement value and one for the value buffer which is used for averaging and the evaluation of minimum and maximum Data Organization Buffer 0 Status Group 1 nnnn Air temperature air temperature buffer barometric pressure barometric pressure buffer Status Group 2 nn Wind wind buffer 48 rt240_and_rt20_
47. or Additional Measurements M1 and C1 Temperature Group Sensor configured for measurement values in SI units Measurement value UMB Min Max Unit Channel Buffer 0 Air temperature current 100 50 0 70 0 C Air temperature min 120 50 0 70 0 C Air temperature max 140 50 0 70 0 Se Air temperature avg 160 50 0 70 0 C Sensor configured for measurement values in Imperial units Measurement value UMB Min Max Unit Channel Buffer 0 Air temperature current 105 58 0 158 0 F Air temperature min 125 58 0 158 0 F Air temperature max 145 58 0 158 0 F Air temperature avg 165 58 0 158 0 F 43 rt240_and_rt20_manual docx Rev 2 6 June 2013 15 1 4 2 Buffer Assignment for Additional Measurements M2 and C2 Wind Group Sensor configured for measurement values in SI units Measurement value UMB Min Max Unit Channel Buffer 0 Wind Speed current 400 0 0 75 0 m s Wind Speed min 420 0 0 75 0 m s Wind Speed max 440 0 0 75 0 m s Wind Speed avg 460 0 0 75 0 m s Wind Speed vct 480 0 0 75 0 m s Buffer 1 Wind Direction current 500 0 0 359 9 Wind Direction min 520 0 0 359 9 Wind Direction max 540 0 0 359 9 S Wind Direction vct 580 0 0 359 9 i Buffer 2 Wind Measurement Quality 805 0 0 100 0
48. re of the air because it is heated and therefore changes the temperature sensor it can infer a value called the Virtual Temperature by using the time of flight measurements already measured and by measuring the barometric pressure The virtual temperature is the temperature of the air as if all moisture been removed from it without changing its pressure and density The barometric pressure is measured by an integrated barometric pressure sensor 3 3 Measurement Definitions 3 3 1 Most Recent Measurement act In accordance with the specified sampling update rate 1 to 10 seconds the value of the last measurement is transmitted when a new measurement value is requested Each measurement is stored in a circular buffer for the subsequent calculation of minimum maximum and average values 3 3 2 Minimum Maximum and Average Values min max and avg The most recent measurements act are all placed in a circular buffer first in first out that includes the number of needed for the averaging sample count configured at the factory per customer specification This buffer is then used to calculate the minimum maximum and average Note The averaging sample count for wind related measurements can be set from 1 to 60 measurements Barometric pressure has its own buffer and can average from 1 to 10 minutes Note In the case of wind direction the minimum maximum value indicates the direction at which the minimum maximum wind speed was meas
49. s greater than maximum value This is not an error The maximum and minimum wind direction values indicate the direction at which the minimum maximum wind speed was measured rt240_and_rt20_manual docx 17 Rev 2 6 June 2013 13 Appendix A Digital Communication MODBUS The MODBUS protocol is available to enable the integration of RT240 and RT20 wind sensors into PLC and similar environments Measurement values are mapped to MODBUS input registers The implementation of the MODBUS protocol includes all measurements of which the sensor is capable including the translation into different unit systems SI units Imperial In the interest of safe and simple commissioning the RT240 and RT20 do not use register pairs for floating point or 32 bit integers as the use of register pairs is not described in the MODBUS standard documents All measurement values are scaled to fit into 16 bit integer registers 13 1 1 MODBUS Communication Parameters RT240 and RT20 can be configured with the following options MODBUS operating mode MODBUS RTU or MODBUS ASCII Baud Rate 19200 9600 4800 or less Data Bits 8 Parity EorN Stop Bits 1 Note RT240 MODBUS communication has been tested with 1 sec poll rate Proper function of the device will not be guaranteed for higher poll rates 13 1 2 Addressing Valid MODBUS addresses are 1 to 247 13 1 3 MODBUS Functions The functions of Conformance Class 0 and 1 have been impl
50. s command is used to switch between 4 heating modes The trigger property TG is automatically set to O disabled when the setting the heating mode to 3 or 4 Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt HT lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt O Heating is always off 1 Heating is automatically controlled The heater switches on when the housing temperature falls below the heater set point and back off once the temperature reaches 5 above the setpoint This set point is part of the factory configuration based on customer specification 2 The switch on temperature is shifted to 40 C thus the heating switches on at room temperature for test purposes only 3 Heating is disabled when the control line is at high level otherwise automatic 4 Heating is disabled when the control line is at low level otherwise automatic The current setting is delivered as the response if no entry is made for lt value gt Response I lt ID gt lt value gt CR Note lt value gt will be padded with 4 leading zeros 14 1 8 Device ID Description This command is used to set the sensor ID Allowable ID s range from 0 to 98 Note The sensor must be in ADMIN mode to change this setting See Access Mode comma
51. st device identification aAb Address change to b 0 9 A Z a Z aM Measurement minimal base data set aMi Measurement Temperature Values aM2 Measurement Wind Values aM3 Measurement Barometric Pressure Values aMC Measurement minimal base data set transmit values with CRC aMC1 Measurement value assignment as for aMn commands transmission with aMC3 CRC aC Concurrent measurement complete base data set aC1 Concurrent measurement value assignment as for aMn Commands aC3 extended data set aCC Concurrent measurement complete data set transmit values with CRC aCC1 Concurrent measurement complete data set value assignment as for aMn aCC3 Commands extended data set transmit values with CRC aDO Data request buffer 0 aD1 Data request buffer 1 aD2 Data request buffer 2 aD3 Data request buffer 3 aD4 Data request buffer 4 aRO Data request from continuous measurement data set 0 aR1 Data request from continuous measurement data set 1 36 rt240_and_rt20_manual docx Rev 2 6 June 2013 aR2 Data request from continuous measurement data set 2 aR3 Data request from continuous measurement data set 3 aR4 Data request from continuous measurement data set 4 aRCO Data request from continuous measurement data set 0 with CRC aRC1 Data request from continuous measurement data set 1 with CRC aRC2 Data request from continuous measurement data
52. system used for the display of the SDI 12 data between SI metric and Imperial US units The command is implemented as X extended command Command aXU lt u m gt Response aU lt u m gt lt CR gt lt LF gt u Imperial US Units m SI Metric Units 50 rt240_and_rt20_manual docx Rev 2 6 June 2013 Example Select SI metric units OXUm OUm lt CR gt lt LF gt 15 1 7 Message Adjustment of the Altitude For the calculation of the relative barometric pressure the local altitude meters above sea level of the device is required Command aXH nnnn nnnn Altitude of Sensor in m Response aXH nnnn lt CR gt lt LF gt The assignment of an invalid altitude outside the following range 100 lt altitude lt 5000 will be answered with aXHf lt CR lt lt LF gt Example The altitude of the location of installation is 135m OXH 135 OXH 135 lt CR gt lt LF gt 15 1 8 Set Heating Mode Command The RT240 has 2 heating elements to keep the sensor free of snow and ice one in the upper portion of the sensor and one in the lower portion The RT20 has one heater in the lower portion The heating of the RT240 can be operated in 3 different modes RT20 2 modes 0 Heating always off 1 Automatic The heating switches on when the housing temperature falls below the heater setpoint adjustable between 2 C and 50 C set by the factory per customer specification and switches off at a housing temperature 5 C above the setpoint
53. telephone number as the consignee Description of the items being returned Quantity of each item being returned Value for customs insurance purchase price or replacement cost Number of cartons with respective weights and dimensions Please include the following statement to avoid paying US import duties These items are being returned to their U S manufacturer Country of manufacture and origin is USA HTS CODE 9801 00 1012 4 Pack your repair item in a sturdy packing carton Tag each item with a brief description of the problem 5 Insure your shipment against damage or loss in transit Be sure to check the appropriate box and enter a Value for Carriage insurance on your air waybill The value is the purchase price of the equipment or what it would cost to replace the equipment if the shipment were lost Keep a record of the tracking number Once your item arrives we will assess the item and notify you of the repair cost Any repair charges and freight costs if applicable are payable before NRG Systems will return the repaired item to you via door to door courier service NRG Systems will send you a shipment advisement when the repaired item is shipped International Customers Before sending the repair item to NRG Systems check with your local customs authorities about provisions in your country for exporting and re importing repair items Some countries treat repair shipments like new shipments and charge import du
54. the equipment is not grounded To return a defective product call NRG Systems at the telephone number listed below for an RMA number You must have available when you call the serial number of the item as well as the date purchased No products will be accepted for warranty work without an RMA number The product must be returned postage prepaid to NRG Include a brief description of the problem RMA number and a return address with phone number The foregoing limited warranty is given in lieu of all other warranties express or implied NRG specifically disclaims all implied warranties including but not limited to any implied warranties of merchantability and fitness for a particular purpose The above limited warranty expressly excludes and NRG shall not be liable for any incidental or consequential damages caused or related to the use of inability to use or malfunction of this product Prompt disposition NRG will make a good faith effort for prompt correction or other adjustment with respect to any product which proves to be defective within warranty First contact NRG or representative from whom product was purchased and ask for an RMA number NRG will also make a good faith effort for prompt service after the warranty period Contact NRG with the nature of the problem and obtain an RMA number Inspect your shipments for damaged or missing packages immediately upon receipt Record any such exceptions on the freight receipt of the deli
55. ties and taxes again upon re importation Other countries have specific steps to follow or specific forms to complete which help reduce the import duties upon re import of the item 54 rt240_and_rt20_manual docx Rev 2 6 June 2013 US CUSTOMERS Please see items 1 4 and 5 above Send your item s to NRG Systems Freight Prepaid and Insured Shipments sent freight collect will not be accepted by NRG Systems NRG Systems Inc Attn RMA 110 Riggs Road Hinesburg VT 05461 USA 55 rt240_and_rt20_manual docx Rev 2 6 June 2013 Specifications hace Ultrasonic Wind Sensors S73 7 6 x 2 Lr mE A Specification 5747 IceFree Ultrasonic Wind Sensor RT240 5749 Ultrasonic Wind Sensor RT20 Sensor Type a ultrasonic wind speed and direction sensor ultrasonic wind speed and direction sensor Applications a wind turbine control for onshore and offshore turbines in wind turbine control for onshore turbines in all weather conditions all weather conditions including ice and snow where significant icing is not a concern wind resource assessment Dimensions overall height 170 mm 6 7 inches overall height 170 mm 6 7 inches diameter 150 mm 5 9 inches diameter 150 mm 5 9 inches Weight 1 63 kg 3 59 Ibs 0 83 kg 1 83 bei Heater 240W maximum 140W option available 20W Signal Type s digital RS 485 half and full duplex NMEA MODBUS UMB s digital RS 485
56. ured 3 3 3 Vectorial Average Value vct The vector averaging method breaks down the individual velocity vectors speed and direction pairs into orthogonal component values It then averages those components and recombines the result to report a vector average speed and vector average direction This method is far more accurate than simply averaging the speeds and directions individually 4 Introduction The NRG IceFree RT240 and RT20 Ultrasonic Wind Sensors are wind direction and wind speed sensors Both sensors are also capable of calculating barometric pressure virtual temperature and the quality of the signal The RT240 is all aluminum fully heated sensor rated for offshore use The RT20 is a polycarbonate sensor with a 20W heater to minimize freezing The heaters on both sensors can be thermostatically controlled 5 rt240_and_rt20_manual docx Rev 2 6 June 2013 The equipment is connected with an 8 pole screw connector see specifications The measured values can be requested over a variety of interfaces e RS485 interface in half or full duplex o UMB binary protocol o UMB ASCII protocol o NMEA protocol 0183 o SDI 12 protocol o Modbus RTU and Modbus ASCIl protocols e Analog data output of 2 adjustable channels RS485 interface 2 or 4 wire half or full duplex Data bits 8 SDI 12 mode 7 Stop bit Parity No SDI 12 mode even Tri state 2 bits after stop bit edge Adjustable baud rates 1200 2400 480
57. vely We recommend the use of the continuous measurement commands R commands to request the data 15 1 3 Measurement and Sensor Settings Data Messages 15 1 3 1 Units Though the RT240 and RT20 are capable of both SI metric and Imperial units for SDI 12 it has been factory configured to be one or the other based on customer specification as a simplification for SDI 12 usage The configured system of units is not indicated in the data messages However the controller may request this setting with the command and evaluate the data messages accordingly In addition the selection of units can be changed through the SDI 12 interface using a special X command See below 15 1 3 1 Settings The sensor s heating system can be controlled though the SDI 12 interface as well Finally the altitude of the sensor can be programmed to re reference the pressure measurements Both of these controls are described below 37 rt240_and_rt20_manual docx Rev 2 6 June 2013 15 1 3 1 Measurement Data Structures The sensor has five buffers 0 through 4 Each buffer holds four measurement values typically In this way responses to all data requests are limited to 35 characters which is an approach acceptable to all types of measurement requests C requests are permitted to accept as many as 75 characters per the SDI 12 standard M requests are limited to a maximum of 9 values Therefore the most common measurements have been placed in
58. very agent If any contents are damaged or missing report this in writing to the freight carrier and send NRG a copy of the damage report If you insured the shipment yourself report any damages to your insurance carrier TEL 802 482 2255 FAX 802 482 2272 EMAIL sales nrgsystems com 53 rt240_and_rt20_manual docx Rev 2 6 June 2013 16 2 Return Instructions Repairs INTERNATIONAL CUSTOMERS 1 Contact NRG Systems to obtain an RMA number Return Material Authorization Write the RMA number clearly on all shipping cartons 2 Send your item to NRG Systems Delivery Duty Paid to NRG Systems see address below using a door to door courier service such as UPS FedEx or DHL If the repair is not urgent please send your package by Airmail Courier services deliver the package directly to us customs cleared e NRG will not accept packages shipped Freight Collect or with Collect charges If NRG refuses the shipment the courier service will charge your account return freight charges e DONOT send return items by direct or consolidated air freight service with an airline The cost for air freight may seem lower than the courier service but air freight costs do not include customs clearance airport handling break bulk fees and inland delivery to NRG Systems 3 Attach a Commercial Invoice to the carton The Commercial Invoice should include the following information Name and address of the shipper NRG Systems complete address and
59. y disconnecting the sensor from the power supply Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt DM lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt O half duplex 30 rt240_and_rt20_manual docx Rev 2 6 June 2013 1 full duplex The current setting is delivered as the response if no entry is made for lt value gt Response I lt ID gt lt value gt CR 14 1 6 Heating duty Description This command is used to switch between full and half alternating heating duty Although the RT20 will accept this command it has only one heater and therefore does not offer half heating duty Note The sensor must be in ADMIN mode to change this setting See Access Mode command You must subsequently put the sensor back into Read Only mode to permanently save this setting to the sensor Request lt ID gt HP lt value gt CR lt ID gt Device address 2 decimal places with leading zeros lt value gt O full heating duty 1 alternating heating The current setting is delivered as the response if no entry is made for lt value gt Response I lt ID gt lt value gt CR Note lt value gt will be padded with 4 leading zeros 31 rt240_and_rt20_manual docx Rev 2 6 June 2013 14 1 7 Heating mode Description Thi
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