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6.2 CO

2

sensor calibration

CO

2

sensor calibration check can be performed every three/four years.

For a correct sensor calibration, it is crucial to know and respect the physical
phenomena that represent measurement bases: for this reason, we recommend to
thoroughly follow the information below and to perform new calibrations only if in

possession of adequate technical knowledge.
CO

2

sensor can be calibrated in clean air. Each new calibration deletes the previous

one.
To calibrate the sensor, proceed as follows:

1.

Ensure the instrument is actually in clean air.

2.

Power up the instrument by connecting the serial output to your PC USB port by

means of the special RS45 connection cable.

3.

Wait for at least 15 minutes before proceeding.

4.

Start DeltaLog14 program and follow the guided sensor calibration procedure.

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Содержание HD45 17A

Страница 1: ...formation written in this manual and the instrument you have purchased We cannot completely exclude errors in the manual for which we apologize The data images and descriptions included in this manual cannot be legally asserted We reserve the right to make changes and corrections with no prior notice REV 2 3 28 03 2013 HD45 HD46 Series ENGLISH ...

Страница 2: ...ersive Infrared Technology that ensures long lasting accurate and stable measures thanks to the use of a double filter and a special measurement technique The presence of a protection membrane through which sampled air flows protects the sensor from dust and atmospheric agents The instruments are factory calibrated and require no further adjustment by the installer The instrument is wall mounted a...

Страница 3: ...ve a display with backlight that can be enabled by a simple key pressure Models of the series HD45 provided with relay have a hardware switch that allows quick selection of the threshold between a set of preset values All models perform continuous measure storing and data can be downloaded on a PC Instruments are powered with 24Vac or 15 35Vdc supply ...

Страница 4: ...1 Power HD45 17DAR 2 1 Power HD45 7BV 2 Power HD45 7BA 2 Power HD45 7BS Power HD45 7BR 1 Power HD45 7BSR 1 Power HD45 7BVR 2 1 Power HD45 7BAR 2 1 Power HD45 7BDV 2 Power HD45 7BDA 2 Power HD45 7BDS Power HD45 7BDR 1 Power HD45 7BDSR 1 Power HD45 7BDVR 2 1 Power HD45 7BDAR 2 1 Power HD45 BV 1 Power HD45 BA 1 Power HD45 BS Power HD45 BR 1 Power HD45 BSR 1 Power HD45 BVR 1 1 4 LED CO2 level HD45 BAR...

Страница 5: ...DA 2 Power HD46 17DS Power HD46 17DTR 2 Power RH T HD46 17DTSR 2 Power RH T HD46 17BV 3 Power HD46 17BA 3 Power HD46 17BS Power HD46 17BR 3 Power RH T CO2 HD46 17BSR 3 Power RH T CO2 HD46 17BDV 3 Power HD46 17BDA 3 Power HD46 17BDS Power HD46 17BDTR 3 Power RH T CO2 HD46 17BDTSR 3 Power RH T CO2 In the Analog output and Relay output columns the number of the available outputs is indicated in brack...

Страница 6: ...6 POWER LED LCD Serial output with mini USB connector Air Quality LED indicators Serial output with mini USB connector HD45 D only POWER LED Humidity LED Temperature LED CO2 LED LCD Keyboard Serial output with mini USB connector HD46 D only HD46 DT only HD46 17B R only HD46 R only HD46 R only ...

Страница 7: ...O2 measurement Keyboard It allows setting of instrument setup parameters and display backlight activation MENU key Accesses setup menu Confirms set value ESC key Exits parameter setting mode Deletes not confirmed changes ARROW UP key Scrolls through parameter list Increments selected parameter value ARROW DOWN key Scrolls through parameter list Decrements selected parameter value Serial output wit...

Страница 8: ...the transmitter next to windows outside doors direct heat air conditioning or within occupants breathing zone In all models sensors and electronics are housed inside a robust plastic case The grids at the bottom and top of the housing allow ambient air to reach the internal sensitive elements To install the instrument open the housing by pushing down the upper and lower tabs then pull to remove th...

Страница 9: ...agrams below In order to make connection procedures easier the connection diagram of each model is impressed also at the interior of the base Once the connection procedure is completed put the front panel in place again making sure that the upper and lower tabs are correctly inserted in their slots Fig 3 C Fig 3 C Closing the instrument ...

Страница 10: ... 10 3 1 HD45 connection diagrams ...

Страница 11: ... 11 3 2 HD46 connection diagrams ...

Страница 12: ... 7B HD46 17 Fig 4 A Viewing measures in models with a display Models are preset to display temperature in C and relative humidity in You can setup instruments to display temperature in F and humidity as dewpoint Td Dewpoint T T ambient Td Fig 4 B Viewing humidity as dewpoint The instrument requires about 15 minutes to ensure stable measures and indicated accuracy In models provided with a keyboard...

Страница 13: ...chnical data 4 2 Relay outputs HD45 R models have only one relay output that can be associated to one of the quantities measured by the instrument The potential free contact output is preset to close when the measure exceeds the threshold limit In HD46 R models each quantity measured by the instrument is associated to a relay output Relay activation is indicated by the turning on of the correspond...

Страница 14: ...e Tab 4 B for factory settings Tab 4 B Relay output default settings in HD45 models Temperature HD45 17 R and HD45 7B R CO2 HD45 B R Threshold 100 0 C Threshold 1000 ppm Hysteresis 5 0 C Hysteresis 100 ppm If the selector is in a position other than zero we are in simplified mode the relay activates only on the threshold set with the rotary selector If the selector is associated with the CO2 measu...

Страница 15: ...ified mode relays operate with a single freely settable threshold if the instrument is supplied with a keyboard it has a threshold quick setting mode Complete mode relays can operate with one or two thresholds the quick setting mode is disabled The instrument is preset in complete mode with the following thresholds Tab 4 E Relay output default settings in HD46 models complete mode Temperature Humi...

Страница 16: ...n on the display The S symbol on top left of the display indicates that you are in the threshold values screen A full flashing cursor appears next to one of the available thresholds Thresholds can be changed as follows 1 If necessary move the cursor on the desired threshold with and keys 2 Press MENU the cursor passes in underlined mode 3 Change the value with and keys 4 Confirm by pressing MENU o...

Страница 17: ...sed the threshold screen is not displayed but you access the complete configuration mode see section Configuration by means of a keyboard Relay operation in Complete mode When the instrument is set in complete relay operation mode each relay is associated with two configurable thresholds named A and B You can select either to make relays operate with both thresholds or with one of the two The rela...

Страница 18: ...If threshold A value is lower than threshold B value the contact is open if the measuring value rises above threshold B value or falls below threshold A value The contact is closed if the measuring value is within the two threshold values 6 Relay activates below threshold B with hysteresis The contact closes if the measured value falls below threshold B Contact opens if the measured value rises ab...

Страница 19: ...and below threshold B with hysteresis Relay action is different depending if threshold A value is greater or lower than threshold B value If threshold A value is greater than threshold B value the contact is closed if the measuring value rises above threshold A value or falls below threshold B value The contact is open if the measuring value is within the interval ranging between threshold B plus ...

Страница 20: ...A with hysteresis for CO2 and humidity and Relay active below threshold B with hysteresis for temperature Further to the above mentioned modes the relay contact can also be made to close when an error occurs relating to the measured quantity for example in case of sensor fault or of a value measured over the set range Thus the relay can be used only to check the measured quantity only to signal an...

Страница 21: ...m Threshold values and hysteresis can be configured For the setting procedure see section CONFIGURATION LED indicators operate independently from relay operation Indicator thresholds and hysteresis are different parameters than relay thresholds and hysteresis So relay can be activated at different values than LED thresholds 4 4 Logging Instruments are in continuous logging mode from the moment the...

Страница 22: ...dule calibration data 3 Humidity module calibration data not present 4 Error in configuration and or calibration data 5 Program memory altered 6 Error in temperature calibration 7 Temperature measure out of range 8 Humidity measure out of range 9 CO2 measure out of range In models without display when an error occurs the POWER LED flashes a number of times equal to the error number spaced by a seq...

Страница 23: ...talled and power supplied the instrument is designed to avoid interferences between the two power supplies With the RS45I cable the instrument is not powered by the PC USB port Fig 5 A Serial connection mini USB connector The instrument parameters setup can be easily performed by means of the supplied application program for PC DeltaLog14 In such case please refer to the software manual for parame...

Страница 24: ...sure to keep the new code in a safe place There are no commands for the reset of the access code The loss of the code precludes the possibility to change the configuration parameters set to authorisation level 1 In case of loss of the access code the user shall address the technical service giving them a number supplied by the instrument through which it will be possible to trace the code in the t...

Страница 25: ...en the message Press MENU to edit parameters appears but press or to set the first digit of the code Confirm the entered digit by pressing MENU the cursor will move on the second digit Enter the other 5 code digits in the same way Note the entered digit remains in evidence for one second then it is replaced by an asterisk even if it hasn t yet been confirmed Even if it is no more visible the digit...

Страница 26: ...d by the indication d if expressed in decimals or by h if expressed in hexadecimals Press the MENU key to access Edit mode a full flashing cursor will appear in correspondence with the parameter value At this point you can select if to edit the parameter value or the authorization level Changing the parameter value When the full cursor flashes on the parameter value press again the MENU key The cu...

Страница 27: ...pears At this point you can scroll again through the parameter list with the arrow keys Changing the protection level When the full cursor flashes on the parameter value press again the or keys to move the full flashing cursor on the level value Press the MENU key the cursor will move to the underlined mode ...

Страница 28: ...de To exit configuration mode press the ESC key at any time If the cursor is not on the display by pressing ESC the instrument returns directly to the measuring mode If on the contrary the cursor is displayed the instrument exits edit mode the cursor disappears but remains in configuration mode press again ESC to exit Any changes which have not been confirmed will be deleted The instrument leaves ...

Страница 29: ... Alphanumeric code Max 34 digits 1 001 User calibration date 2 002 Number of samples to be averaged for measure printing on serial port MIN 1 MAX 20 1 003 CO2 calibration point ppm MIN 200 MAX 600 400 004 Atmospheric pressure hPa MIN 0 MAX 3000 1013 005 Logging interval 0 30 seconds 1 1 minute 2 5 minutes 2 006 Temperature measuring unit 0 C 1 F 0 007 Humidity measuring type 0 RH 1 Dewpoint Td in ...

Страница 30: ...analog output x10 MIN P 016 MAX P 018 P 020 40 3 018 F temperature at 10V or 20mA analog output x10 MIN P 017 P 020 MAX P 019 1760 3 019 Maximum F temperature that can be associated to 10V or 20mA analog output x10 MIN P 018 MAX 1850 185 0 F 1850 3 020 Minimum C temperature range for analog output x10 MIN 180 18 0 F 360 3 3 The displayed value is the quantity value multiplied by 10 decimal point n...

Страница 31: ...um scale analog output x10 MIN 0 MAX P 032 0 3 032 C Ta Td at minimum scale analog output x10 MIN P 031 MAX P 033 P 035 0 3 033 C Ta Td at 10V or 20mA analog output x10 MIN P 032 P 035 MAX P 034 400 3 034 Maximum C Ta Td that can be associated to 10V or 20mA analog output x10 MIN P 033 MAX 450 45 0 C 450 3 035 Minimum C Ta Td range for analog output x10 MIN 50 5 0 C 100 3 3 The displayed value is ...

Страница 32: ...below threshold B with hyster and in error FF always enabled 06 6 042 Temperature relay operating mode in HD46 models with simplified mode disabled As P 041 05 043 Humidity relay operating mode in HD46 models with simplified mode disabled As P 041 06 044 Threshold B relay in HD45 and CO2 relay in HD46 relay activated below threshold Thres is in ppm if associated with CO2 Threshold is x10 if associ...

Страница 33: ...LED indicators in HD45 BVR and HD45 BAR model MIN 0 MAX 100 20 5 062 Relay operating mode in HD45 models when rotary selector is in position other than 0 0 Active below threshold 1 Active over threshold 1 5 063 Relay simplified mode activation in HD46 models 0 Disable simplified mode 1 Enable simplified mode 0 064 CO2 relay operating mode in HD46 with simplified mode enabled 0 Active below thresho...

Страница 34: ...093 Maximum possible threshold x10 for humidity relay in HD46 models with simplified mode enabled Over the whole range 700 3 4 3 The displayed value for temperature and humidity is the quantity value multiplied by 10 decimal point not displayed 4 The parameter measuring unit is the same as the respective measured quantity set with P 006 and P 007 parameters 5 This parameter is for HD45 models 6 In...

Страница 35: ...he following values Humidity relay operative mode P 043 07 Threshold B for humidity relay P 046 350 the decimal point is not displayed Threshold A for humidity relay P 049 600 the decimal point is not displayed Hysteresis for humidity relay P 052 30 the decimal point is not displayed Simplified mode activation P 063 0 default setting The complete procedure is as follows 1 Press MENU to access conf...

Страница 36: ...dit mode 10 Change P 049 value to 600 with the and keys then press MENU to confirm 11 Select P 052 parameter with the key then press MENU twice to access Edit mode 12 Change P 052 value to 30 with the and keys then press MENU to confirm 13 Press ESC to exit Configuration mode ...

Страница 37: ... the relative humidity and temperature module open the housing by pressing down the upper and lower tabs then pull to remove the front panel see Fig 3 A in section INSTALLATION AND CONNECTION Ensure power supply is not connected PC not connected to mini USB serial connector The module is located next to the terminal block under the mini USB serial connector Fig 6 A To remove it gently pull upwards...

Страница 38: ...form new calibrations only if in possession of adequate technical knowledge CO2 sensor can be calibrated in clean air Each new calibration deletes the previous one To calibrate the sensor proceed as follows 1 Ensure the instrument is actually in clean air 2 Power up the instrument by connecting the serial output to your PC USB port by means of the special RS45 connection cable 3 Wait for at least ...

Страница 39: ...ease find below the list of configuration commands and data requests that can be sent through a PC with the instrument connected via mini USB output Tab 7 A Communication protocol Command Response Description G0 HD Transmitter model G1 Vnn nn aaaa mm gg Firmware version and date G2 aaaa mm gg hh mm ss Calibration date and time G3 nnnnnnnn Instrument serial number G4 nnnnnnnn Relative humidity modu...

Страница 40: ...lock see section CONNECTION AND INSTALLATION and is suitable for fixed installations Thanks to RS485 output several instruments can be connected to form a network consisting of a minimum of 1 instrument to a maximum of 247 connected in a sequence through a shielded cable with twisted pair for signals and a third wire for the common Fig 8 A Connection to RS485 network for HD45 and HD46 models As sh...

Страница 41: ...rate 19200 Parity Even Start bit 1 Data bits 8 Stop bit 1 Transmitter address baud rate parity type and stop bits number are configurable parameters See section CONFIGURATION for setup modes Note communication via RS485 port is disabled if the instrument is connected to the PC through the mini USB output The CD ROM supplied with the instrument includes utility files to make RS485 communication eas...

Страница 42: ...ed by two stop bits Fig 8 D Byte format without parity bit in MODBUS RTU protocol The byte is transmitted starting from the least significant bit LSB All bytes in a command are transmitted in a series with no interruptions starting from the address byte The last byte to be transmitted is the most significant byte in the control code CRC If two consecutive bytes are separated by a pause greater tha...

Страница 43: ...ansmission conflicts between instruments the PC shall also have to wait for response from the questioned instrument before sending a new command If the instrument doesn t receive a correct command time intervals between characters or control codes not respected it will not reply to the PC If the PC doesn t receive any response within a specified time interval time out it will consider the command ...

Страница 44: ...nd and response will have the following format Command Value Length Description Function 01h 1 byte Relay state reading command Data 0000h to FFFFh 2 bytes First relay address 0001h to 007Dh 2 bytes Number of relays to be read N Response Value Length Description Function 01h 1 byte Relay state reading command Data 01h 1 byte Number of bytes with relay state 1 byte Relay state The following table l...

Страница 45: ...significant bit corresponds to the C02 relay state 0 disabled the second bit corresponds to the temperature relay 1 enabled the third bit corresponds to the humidity relay 0 disabled Configuration parameters reading function 03h Function code 03h allows to read a specified number of consecutive instrument parameters The configuration register address containing the first parameter to be read and t...

Страница 46: ... 1 2 0016 P 000 User code character 16 ASCII 8 bits LSB 1 00 1 2 0017 P 000 User code character 17 ASCII 8 bits LSB 1 00 1 2 0018 P 000 User code character 18 ASCII 8 bits LSB 1 00 1 2 0019 P 000 User code character 19 ASCII 8 bits LSB 1 00 1 2 0020 P 000 User code character 20 ASCII 8 bits LSB 1 00 1 2 0021 P 000 User code character 21 ASCII 8 bits LSB 1 00 1 2 0022 P 000 User code character 22 A...

Страница 47: ... Int 16 bits 1 00 0058 P 019 Max temperature in F at 10V or 20mA x10 Int 16 bits 1 00 0059 P 020 Minimum temperature range in F for the analog output x10 Int 16 bits 1 00 0060 P 021 Min RH at analog output minimum scale x10 Int 16 bits 1 00 0061 P 022 RH at analog output minimum scale x10 Int 16 bits 1 00 0062 P 023 RH at 10V or 20mA x10 Int 16 bits 1 00 0063 P 024 Max RH at 10V or 20mA x10 Int 16...

Страница 48: ...s 8 bits LSB 1 03 2 0093 P 054 Lower threshold ppm for HD45 BVR and HD45 BAR LED indicators Int 16 bits 1 03 0094 P 055 Medium threshold ppm for HD45 BVR and HD45 BAR LED indicators Int 16 bits 1 03 0095 P 056 Upper threshold ppm for HD45 BVR and HD45 BAR LED indicators Int 16 bits 1 03 0096 P 057 Threshold hysteresis ppm for HD45 BVR and HD45 BAR LED indicators Int 16 bits 1 03 0097 P 058 RS485 a...

Страница 49: ... 3 10003 Access code character 3 ASCII 8 bits LSB 1 00 2 3 10004 Access code character 4 ASCII 8 bits LSB 1 00 2 3 10005 Access code character 5 ASCII 8 bits LSB 1 00 2 3 10006 Access code character 6 ASCII 8 bits LSB 1 00 2 3 1 Read only 2 8 bits LSB indicates register least significant byte 3 The reading of an access code register doesn t show the code character but value 1 if the code is active...

Страница 50: ... 0002h Consequently the command assumes the following format Command Value Length Description Function 03h 1 byte Parameters reading command Data 00h First parameter address MSB 3Ch 2 bytes First parameter address LSB 00h Number of parameters to be read MSB 02h 2 bytes Number of parameters to be read LSB The instrument answers with the two parameter values 20 0 x 10 200 00C8h 80 0 x 10 800 0320h R...

Страница 51: ... of quantities to be read N Response Value Length Description Function 04h 1 byte Measurements reading command Data 2 x N 1 byte Number of bytes for the values 2 x N bytes Measurements values A measurement value is stored in a 16 bit register and consequently always requires a 2 byte length The most significant byte precedes the least significant one The following table lists the available quantit...

Страница 52: ...ead 1 0001h Consequently the command assumes the following format Command Value Length Description Function 04h 1 byte Measurements reading command Data 00h First quantity address MSB 02h 2 bytes First quantity address LSB 00h Number of quantities to be read MSB 01h 2 bytes Number of quantities to be read LSB The instrument will answer with the measured value 65 8 x 10 658 0292h Response Value Len...

Страница 53: ...1 byte Commands execution Data 0002h 2 bytes Command address number 1 FF00h 2 bytes Fixed value Response Value Length Description Function 05h 1 byte Commands execution Data 0002h 2 bytes Command address number 1 FF00h 2 bytes Fixed value Only parameters changed within command transmission are permanently stored any changes made afterwards require a new transmission of the command in order to make...

Страница 54: ... changing the parameters modify the content of the above mentioned registers to disable the code If the request involves writing a parameter not included in Table 8 C the instrument replies with the following error message Response Value Length Description Function 86h 1 byte Error in parameter writing Data 02h 1 byte Operation involved a non existent parameter Tab 8 F page 59 Changing several con...

Страница 55: ...wer supply failure in the instrument To make any parameter changes permanent Parameter permanent storage command shall follow the parameter change function 05h To change parameters protected by an access code you must first write the code in the configuration registers from number 10000 to 10005 After changing the parameters modify the content of the above mentioned registers to disable the code I...

Страница 56: ...er value LSB The instrument replies by Response Value Length Description Function 10h 1 byte Parameters write command Data 27h Address of the 1st code char MSB 10h 2 bytes Address of the 1st code char LSB 00h 6 parameters written MSB 06h 2 bytes 6 parameters written LSB The instrument compares the written access code with the one stored in the internal memory if they are equal it allows parameter ...

Страница 57: ...manent storage of changes transmit the command below Command Value Length Description Function 05h 1 byte Commands execution Data 0002h 2 bytes Permanent storage command address FF00h 2 bytes Fixed value At the end parameters can be protected again from undesired alterations by sending a different access code than the one stored in the internal memory Instrument error conditions function 07h Funct...

Страница 58: ... Manufacturer Instrument model Firmware version The command format will be as follows Command Value Length Description Function 2Bh 1 byte Information reading command Data 0Eh 1 byte Fixed value MEI type Modbus Encapsulated Interface 01h 1 byte Fixed value Identification type basic 00h 1 byte Fixed value First information field The instrument will answer as follows Response Value Length Descriptio...

Страница 59: ...strument is not able to complete for any reason the requested action a response is generated containing an error code The value entered in the Function field corresponds to the received Function code with the most significant bit MSB set to 1 in order to inform the Master unit about either the error condition and the function that generated the error Response Value Length Description Function Requ...

Страница 60: ...HD46 17 and HD46 17B models Sensor type NTC 10KΩ Measuring range 30 85 C 22 185 F Accuracy except models with current output 0 2 C 0 15 of reading within 0 70 C 0 3 C 0 15 of reading within 30 0 C 70 85 C Accuracy for models with current output 0 5 C 0 15 of reading within 30 85 C Resolution 0 1 C Response time T90 30 sec air speed 2m sec Long term stability 0 1 C year Carbon Dioxide CO2 for HD45 ...

Страница 61: ...rval Serial outputs mini USB mini USB USB cable RS45 or RS45I cod RS485 MODBUS RTU HD45 S and HD46 S only Stored data security Unlimited Analog outputs 0 10Vdc RL 10kΩ HD45 V and HD46 V only 11Vdc out of range 4 20mA RL MAX 400Ω HD45 A and HD46 A only 22mA outside the measuring range Active sourcing current output Relay outputs Bistable relay HD45 R and HD46 R only Contact max 1A 30Vdc resistive l...

Страница 62: ... 62 Dimensions in mm HD45 series HD46 series ...

Страница 63: ... 63 Fixing holes ...

Страница 64: ...actory in perfect safety technical conditions The instrument proper operation and operating safety can be ensured only if all standard safety measures as well as the specific measures described in this manual are followed The instrument proper operation and operating safety can be ensured only in the climatic conditions specified in this manual Do not use the instrument in places where there are R...

Страница 65: ...CO2 HD46 V 0 10Vdc analog outputs A 4 20mA analog outputs S RS485 MODBUS RTU output R Relay outputs SR RS485 MODBUS RTU output and relay outputs If there is the analog output there cannot be the RS485 output and vice versa With V or A option there is an analog output for each measured quantity With R and SR options there is a relay output for each measured quantity D With display DT With display a...

Страница 66: ...6 17S Temperature and humidity transmitter Without display and keyboard no relays with RS485 output Accessories DeltaLog14 Software for connection to a PC through serial port with mini USB connector instrument configuration and data download For Windows operating systems HDM46 Calibrated relative humidity and temperature replacement module for HD46 models only RS45 Not isolated serial connection c...

Страница 67: ...he instrument allows to edit or disable the parity check by means of the configuration parameter P 060 CRC code CRC code is a 16 bit binary value computed in function of all the message bytes and is attached at the end of the message to be transmitted The code computing procedure is as follows 1 The 16 bits of the CRC register are all initialized to 1 2 The exclusive OR XOR is performed between th...

Страница 68: ...ift step 3 0010 0100 1111 1111 1 Fixed value step 4 shifted out bit is 1 1010 0000 0000 0001 XOR Computation 1000 0100 1111 1110 7th right shift step 3 0100 0010 0111 1111 0 8th right shift step 3 0010 0001 0011 1111 1 Fixed value step 4 shifted out bit is 1 1010 0000 0000 0001 XOR Computation 1000 0001 0011 1110 Second information byte 0000 0111 XOR Computation step 2 1000 0001 0011 1001 1st righ...

Страница 69: ... step 3 0010 0100 1000 0100 0 8th right shift step 3 0001 0010 0100 0001 0 The final check code is CRC 0001 0010 0100 0001 1241h The least significant byte is 0100 0001 41h and is the first to be transmitted The most significant byte is 0001 0010 12h and is the last byte of the frame to be transmitted ...

Страница 70: ... HD45 BAR MODEL 21 4 4 Logging 21 4 5 Indicating a fault 22 5 CONFIGURATION 23 5 1 Authorization levels 24 5 2 Configuration through keyboard HD46 DT only 25 6 CALIBRATION 37 6 1 Replacement of R H and temperature module HD46 only 37 6 2 CO2 sensor calibration 38 7 COMMUNICATION PROTOCOL mini USB output 39 8 RS485 COMMUNICATION 40 8 1 MODBUS RTU protocol 41 9 TECHNICAL SPECIFICATIONS 60 10 ORDERIN...

Страница 71: ...measures assigned to international and national reference samples of SIT units is guaranteed by a uninterrupted reference chain which source is the calibration of laboratories samples at the Primary National Metrological Research Institute Product Type Temperature humidity and CO2 transmitter regulator Product Name HD45 HD46 DELTA OHM SRL 35030 Caselle di Selvazzano PD Italy Via Marconi 5 Tel 39 0...

Страница 72: ...Padua applies in any dispute The electrical and electronic equipment marked with this symbol cannot be disposed of in public landfills According to the UE Directive 2002 96 EC the European users of electrical and electronic equipment can return it to the dealer or manufacturer upon purchase of a new one The illegal disposal of electrical and electronic equipment is punished with an administrative ...

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