VAISALA PTB210 (serial) User Guide
Contents
1. NEA 9 5 806 09500 116801 civ 2 4047 24 tie deta sites ieee 10 CONNECTIONS 5 es 11 202 E EE 406 11 RS485 PERAE A de Ate dent edn Mie a nae eee 11 RS232G T Th wet au ne nen oe aa eels 12 CHAPTER 4 OPERATING 5 dure 13 6901 131 25 dee 13 Settings ae hind 14 BAUD Setting the Baud Rate 14 Setting the Serial Communication Parameters 000 14 ID Setting a Identification Code 15 Setting Pressure Limits aesnesseeeriesrirrsecesrrnerinnssernaaena 15 MPM Measurements per Minute 16 AAVRG Defining the 9179 16 PD Setting the Instrument to Power Down State 16 Operating 11181108 lt lt lt lt es 17 P Outputting One Single 6 5530 17 BP Continuous Outputting 17 UNIT Selecting a Pressure Unit 17 Output with or without the Unit 18 RESET Resetting the Instrument 18 Setting the Pressure Corrections On Off 18 CALD Setting the Calibration Date 19 Setting the RS485 Terminating Resistor On Off 19 Self Test n Aa a a E 20 Basic Information of the B2. Figure 4 Recommended Cable Position The IP65 classified housing enables the barometer to be mounted outdoors without any additional protection However please take care that rainwater cannot plug the open pressure fitting In such conditions it is recommended to connect a piece of a tube with inner diameter of 4 mm or more to the fitting It is also possible to use a static pressure head SPH10 20 which protects the pressure channel from rain and minimizes the effect of wind Static Pressure Head Please note that the pressure fitting supplied with the transmitter is not a static pressure head and that the transmitter cannot be used successfully as such in turbulent or high speed static wind conditions In demanding wind conditions it is recommended to use Vaisala s static pressure head SPH10 20 to which the PTB210 digital barometers can be directly integrated This combination provides for accurate measurement in all wind conditions M210669EN D Chapter 3 Installation Connections There are three different serial output interfaces available with the PTB210 digital barometers RS232C RS485 232C and RS232C TTL The connections depend on the output protocol in use In following tables there are presented the connections of these output interfaces RS232C Table 1 Connections of the PTB210 Barometer with RS232C Interface Wire color Sig
3. see figure below LD RUX PTB210 HOST COMPUTER HI HI RX TX Lo LO RXITX etena HI DYNAMIC LINE TERMINATION REQUIRED IF NO DEVICE AT THE END OF THE BUS 120R gt 33nF 19 User s Guide RON lt cr gt The RON command sets the terminating resistor on ROFF lt cr gt The ROFF command sets the terminating resistor off Self Testing Basic Information of the Barometer Settings 2 lt er gt The command lists the basic information of the barometer settings The following example shows also the factory settings for 50 1100 hPa model lt cr gt command not visible PTB210 Ver 1 0 CAL DATE 1999 06 10 ID CODE 10 SERIAL NUMBER T00100004 MULTIPOINT CORR ON MEAS PER MINUTE 60 AVERAGING 3 0 PRESSURE UNIT hPa Pressure Min Max 500 1100 50 1100 for model 50 1100 LOW CURRENT MODE RS485 RESISTOR OFF 20 M210669EN D Chapter 5 Calibration and Adjustment CHAPTER 5 CALIBRATION AND ADJUSTMENT The PTB210 series digital barometers can be fine adjusted and calibrated against pressure standards that have high accuracy and stability as well as known traceability to international standards For the Class A barometers standards with uncertainty of 70 ppm 2 standard deviation value or better should be used For the Class B barometers electronic working standards with uncertainty of 150 ppm are rec
4. setting changes Setting the Pressure Corrections On Off These commands are used to set multi point corrections either on or off See also the chapter Calibration and Adjustment on page 21 MPCON lt cr gt The command activates the multi point corrections MPCOFE lt cr gt The command deactivates the multi point corrections NOTE To activate the new setting please remember to reset the barometer with the command RESET lt cr gt 18 M210669EN D Chapter 4 VAISALA Operating CALD Setting the Calibration Date With this command the last calibration date can be stored in the memory of the barometer CALD xxx XXX calibration date max 15 characters Example CALD 991015 lt cr gt Setting the RS485 Terminating Resistor On Off The PTB210 series barometers have a built in RS485 terminating resistor which is set as default OFF The resistor can be set either ON or OFF with the ROFF ROFF commands If the barometer is in the end of the serial line the resistor should be set ON especially when long cables are used In case several barometers are connected to same line only the resistor of the last one is set ON with the others it should be OFF This prevents formation of excessive load on the line The maximum amount of barometers on same line is 32 At the end of the serial bus there must be a PTB210 barometer a dynamic line adapter or a line master
5. the BAROCAP pressure sensor are carefully matched together to minimize the temperature dependence and to maximize the long term stability The BAROCAP pressure sensor is designed to achieve zero temperature dependence at 1000 hPa and its long term stability has been maximized by thermal ageing at an elevated temperature M210669EN D Chapter 3 Installation CHAPTER 3 INSTALLATION Mounting Due to the compact design of the PTB210 all you need to do is to mount the instrument and to connect the wires Use one of the following three mounting options Remove the pressure fitting and place the barometer on a desired structure Then fix it with the slot headed screws the O ring sealing the attachment A Fix the supplied attachment plate to a desired place Then attach the barometer on the plate with the screws supplied B The PTB210 can also be placed to a standard rail DIN 35 by using the attachment plate and clip B Fasten the clip and barometer to the plate with the screws supplied Finally attach the clip to the rail Figure 3 Different Mounting Options of the PTB210 NOTE Always place the barometer so that the pressure fitting is downwards VAISALA User s Guide NOTE Check that the cable is not taken upwards from the barometer This is to prevent water flowing along the cable and gathering close to the feed through 10
6. Pa 0 15 hPa 0 20 hPa 0 20 hPa 0 30 hPa 0 10 hPa year 0 20 hPa 0 10 hPa 0 10 hPa 0 20 hPa 0 35 hPa 0 40 hPa 0 50 hPa 0 20 hPa year 25 User s Guide 26 Defined as the 2 standard deviation limits of end point non linearity hysteresis error or repeatability error Defined as 2 standard deviation limits of inaccuracy of the working standard including traceability to NIST Defined as the root sum of the squares RSS of end point non linearity hysteresis error repeatability error and calibration uncertainty at room temperature Defined as 2 standard deviation limits of temperature dependence over the operating temperature range General Supply voltage with RS485 with RS232C with RS232C TTL Current consumption normal mode power down mode shutdown mode Shutdown Settling time at power up Serial I O factory setting parity data bits stop bits Baud rate Response time Resolution Max pressure Pressure connector Pressure fitting Housing electronics sensor Housing material Pressure connector Pressure fitting Supply output cable length Weight Instrument Cable 8 18 VDC 5 28 VDC 5 28 VDC reverse polarity protected lt 15 mA factory setting lt 0 8 mA 0 2 mA ON OFF 2s RS232C RS232C TTL optional RS485 non isolated optional none even odd 7 8 1 2 1200 2400 4800 9600 19200
7. VAISALA USER S GUIDE Digital Barometers with Serial Output PTB210 Series M210669EN D PUBLISHED BY Vaisala Oyj Phone int 358 9 8949 1 P O Box 26 Fax 358 9 8949 2227 FI 00421 Helsinki Finland Visit our Internet pages at http www vaisala com Vaisala 2009 No part of this manual may be reproduced in any form or by any means electronic or mechanical including photocopying nor may its contents be communicated to a third party without prior written permission of the copyright holder The contents are subject to change without prior notice Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale Table of Contents CHAPTER 1 GENERAL INFORMATION nn lt lt 3 Safety gt encceie a 3 Feedback ee in 644 9 3 Recycling gt lt gt re gt neue 4 TradeMarkS gt gt gt 4 License Agreement ss 4 Warranty 5 CHAPTER 2 000670 56002711014 lt lt lt 7 CHAPTER 3 INSTALLATION cede stat de dt em ee inst eee nates 9 LA COLE LL LES
8. ala so require be sent to the works of Vaisala or to such other place as Vaisala may indicate in writing freight and insurance prepaid and properly packed and labelled unless Vaisala agrees to inspect and repair the Product or replace it on site VAISALA This warranty does not however apply when the defect has been caused through a normal wear and tear or accident b misuse or other unsuitable or unauthorized use of the Product or negligence or error in storing maintaining or in handling the Product or any equipment thereof c wrong installation or assembly or failure to service the Product or otherwise follow Vaisala s service instructions including any repairs or installation or assembly or service made by unauthorized personnel not approved by Vaisala or replacements with parts not manufactured or supplied by Vaisala d wm modifications or changes of the Product as well as any adding to it without Vaisala s prior authorization e other factors depending on the Customer or a third party Notwithstanding the aforesaid Vaisala s liability under this clause shall not apply to any defects arising out of materials designs or instructions provided by the Customer This warranty is expressly in lieu of and excludes all other conditions warranties and liabilities express or implied whether under law statute or otherwise including without limitation any implied warranties of merchantability or fitness for a par
9. arometer Settings 20 VAISALA User s Guide CHAPTER 5 CALIBRATION AND ADJUSTMENT sn sssnnrennres 21 Wizard Software 22 Op rations 45115 et ue te 22 CHAPTER 6 TECHNICAL DATA 5 25 Technical Specification 25 Operating Range esise R es AR 9296 25 ACCULAGCY aae TAE r i RTR aaa tee eee 25 G n ralement ae 26 Electromagnetic Compatibility 01eeeeeee eee 27 Dimensions in mm inches 28 List of Figures Figure 1 PTB210 and the Standard Accessories 7 Figure 2 The BAROCAP Pressure Sensor 8 Figure 3 Different Mounting Options of the 18210 9 Figure 4 Recommended Cable Position 10 List of Tables Table 1 Connections of the PTB210 Barometer with RS232C Interfaces rent en Pr etre 11 Table 2 Connections of the PTB210 Barometer with RS485 RS232C Interfaces end eens Me rs ie a Ame dr 11 Table 3 Connections of the PTB210 Barometer with RS232C TTL Interface enr is miens mer it tn init T 12 2 M210669EN D Chapter 1 General Information CHAPTER 1 GENERAL INFORMATION Safety Throughout the manual important safety considerations are highlighted as follows WARNING Warning alerts you to a serious hazard If you do not read and f
10. e To start the Wizard program in NT 1 Double click the My Computer icon 2 Double click the drive that contains the file 3 To start the program double click the WIZARD EXE file OR e To start a program by using the Run command in NT 1 Click Start and then click Run 2 Inthe Open box type the location and name of the program you want to start Alternatively browse the location and choose the name of the program WIZARD EXE Then click OK PTB270 WIZARD 1 00 M210669EN D Chapter 5 Calibration and Adjustment 1 Choose the COM port in use from the file menu 2 To open the connection click the Read PTB210 button FA PTB210 Wizard Comt Exi Com3 Calibration cog C Serialnumber Unit 7 Pressure limits hPa MPC_1 C J _ Offset gain 1 hPa MPC_2 ____ ___ 005 09 2 hPa Read PTB210 3 Give reference pressure values and the corresponding corrections Calculate the corrections according to the following equation The settings on left hand side can also be changed corr a F P measured 1 PTB210 Wizard File About Version MPC_1 0 10 Offset gain 1 hPa 600 N 8 1 MPC_2 Offset gain 2 hPa Comm settings wo BIS N arg lt g lt lt Calibration date 002 03 28 MPC_3 Serialnumber MPC_4 Unit MPC_5 Pressure limits hPa MPC_6 RS485 resistor MPC_7 Multipoint corr MPC_8 Meas per minute Averaging IDcode R
11. ead PTB210 Write PTB210 VAISALA 23 User s Guide NOTE The values are given in hPa the reference value as whole number and the correction with two decimals 4 To save the new corrections click the Write PTB210 button 5 The program then asks a password As default no password exists Just click OK The password can be used to prevent saving of any new corrections without entering it To give a password click the Change button PassWord Cancel NOTE Remember to set the MPC corrections on after given them 24 M210669EN D Chapter 6 CHAPTER 6 Technical Data TECHNICAL DATA Technical Specification VAISALA Operating Range Pressure range Operating temperature range Humidity range Accuracy 500 1100 hPa Non linearity Hysteresis Repeatability Calibration uncertainty Total accuracy 20 C Temperature dependence 40 60 C Total accuracy 40 60 C Long term stability 50 1100 hPa Non linearity Hysteresis Repeatability Calibration uncertainty Total accuracy 20 C Temperature dependence 40 60 C Total accuracy 40 60 C Long term stability 500 1100 hPa 50 1100 hPa 40 60 C non condensing Class A 0 10 hPa 0 05 hPa 0 05 hPa 0 07 hPa 0 15 hPa 0 20 hPa 0 25 hPa 0 10 hPa year ClassB 0 15 hPa 0 05 hPa 0 05 h
12. er to reset the barometer with the command RESET lt cr gt VAISALA 15 User s Guide MPM Measurements per Minute MPM xxx lt cr gt XXX number of measurements per minute 6 4200 The command sets the number of measurements performed in one minute As default the MPM is 60 60 min 1 s 1 measurement per second NOTE To activate the new setting please remember to reset the barometer with the command RESET lt cr gt AVRG Defining the Averaging AVRG xxx lt cr gt XXX the number of measurements of which the average is calculated 0 255 As default the AVRG is 0 The command sets the number of measurement points that are used for the calculating an average pressure reading However this is not a moving average An example if the number of measurements per minute is set to 30 and the averaging to 5 the pressure reading is updated every 10 seconds NOTE To activate the new setting please remember to reset the barometer with the command RESET lt cr gt PD Setting the Instrument to Power Down State PD lt cr gt The command sets the barometer to power down state in which it does not measure the pressure The instrument is re activated by pressing the enter key After this the barometer settles in a half of a second Then any command can be given to the barometer 16 M210669EN D Chapter 4 Operating Operating Commands P Outputtin
13. g One Single Message P lt cr gt The command outputs the latest multi point corrected pressure reading with two decimals P lt cr gt command invisible 1012 99 BP Continuous Outputting BP lt cr gt The command outputs the MPC corrected pressure reading continuously The output interval depends on the measurement rate and the averaging The outputting is stopped by pressing enter key lt cr gt P lt cr gt command invisible 997 99 998 01 998 01 998 02 lt cr gt command invisible UNIT Selecting a Pressure Unit UNIT x lt cr gt x 0 hPa 6 kPa 1 mbar 7 Pa 2 inHg 8 mmH20 3 psia 9 inH20 4 torr 10 bar 5 mmHg As default the unit is 0 NOTE To activate the new setting please remember to reset the barometer with the command RESET lt cr gt VAISALA 17 User s Guide Output with or without the Unit FORM 0 lt cr gt The command cancels the outputting of the unit after pressure reading This is also the factory setting for the output format 1017 61 FORM 1 lt cr gt The command adds the unit to the outputting The standard output field is for 6 characters The first character is always a space 1017 61 hPa NOTE To activate the new setting please remember to reset the barometer with the command RESET lt cr gt RESET Resetting the Instrument RESET lt cr gt The command resets the barometer and activates the
14. ic working standards For the pressure range 500 1100 hPa also a higher accuracy barometer is available This manual gives the instructions for the use of PTB210 barometers with the digital output pe call Len PTB210 barometer Fixing screw 2 pcs ae L e P fitti Rail fastening clip ef RE Pa Attachment plate Figure 1 PTB210 and the Standard Accessories VAISALA 7 User s Guide The PTB210 barometers incorporate the BAROCAP silicon capacitive absolute pressure sensor developed by Vaisala The sensor features excellent hysteresis and repeatability characteristics and has an outstanding temperature and long term stability Silicon diaphragm Thin fim metallization Silicon Glass Silicon Vacuum gap Figure 2 The BAROCAP Pressure Sensor The BAROCAP pressure sensor consists of two layers of single crystal silicon having a layer of glass between them The thinner silicon layer creates an integrated vacuum reference chamber and forms a pressure sensitive silicon diaphragm The thicker silicon layer is the rigid base plate of the sensor and it is clad with a glass dielectric Thin film metallization has been deposited to form a capacitor electrode inside the vacuum reference chamber The other electrode is the pressure sensitive silicon diaphragm The coefficients of thermal expansion of silicon and glass materials used in
15. ivery save for products for which a special warranty is given If any Product proves however to be defective in workmanship or material within the period herein provided Vaisala undertakes to the exclusion of any other remedy to repair or at its own option replace the defective Product or part thereof free of charge and otherwise on the same conditions as for the original Product or part without extension to original warranty time Defective parts replaced in accordance with this clause shall be placed at the disposal of Vaisala Vaisala also warrants the quality of all repair and service works performed by its employees to products sold by it In case the repair or service works should appear inadequate or faulty and should this cause malfunction or nonfunction of the product to which the service was performed Vaisala shall at its free option either repair or have repaired or replace the product in question The working hours used by employees of Vaisala for such repair or replacement shall be free of charge to the client This service warranty shall be valid for a period of six 6 months from the date the service measures were completed This warranty is however subject to following conditions a A substantiated written claim as to any alleged defects shall have been received by Vaisala within thirty 30 days after the defect or fault became known or occurred and b wm The allegedly defective Product or part shall should Vais
16. l s 0 01 hPa 1 measurement s 0 05 hPa 20 measurements s 5 000 hPa abs M5 10 32 internal thread barbed fitting for 1 8 I D tubing IP65 IP53 PC plastic M5 10 32 internal thread barbed fitting for 1 8 I D tubing 1 2 3 5 0 10m 110g 28 g m M210669EN D Chapter 6 Technical Data Electromagnetic Compatibility Electromagnetic compatability EN61326 1 1997 Am1 1998 Am2 2001 Generic environment CISPR16 22 class B EN 61000 4 2 EN 61000 4 3 EN 61000 4 4 EN 61000 4 5 EN 61000 4 6 VAISALA 27 User s Guide Dimensions in mm inches N Gel x LE tO N N N N Lo omy 6 Lot Lis f N AL N T N AO 50 1 97 28 M210669EN D Chapter 6 Technical Data A 50 40 1 98 Ss 2 0 08 A o 14 20 x gt 0 56 4 50 of 0 18 40 1 57 Q eo be 37 1 46 60 2 36 _ 14x45 0 55x45 M3 x N Ss 50 Z 1 97 21 0 83 M3 x 3 S VAISALA 29 www vaisala com M217O06 69 EN
17. nal Grey RX Green TX Blue Ground Pink Supply voltage 5 28 VDC Brown not connected White not connected Yellow External power control TTL level 1 5 V off 0 0 V on It is recommended to isolate the free wire ends RS485 Table 2 Connections of the PTB210 Barometer with RS485 RS232C Interface Wire color Signal Grey RX with RS232C Green TX with RS232C Blue Ground Pink Supply voltage 8 18 VDC Brown RS485 White RS485 Yellow External power control TTL level 1 off 0 on See also chapter Setting the RS485 Terminating Resistor On Off on page 19 NOTE The two output protocols cannot be used simultaneously Connect either RX TX or RS485 wires It is recommended to isolate the free wire ends VAISALA 11 User s Guide RS232C TTL Table 3 Connections of the PTB210 Barometer with RS232C TTL Interface Wire color Signal Grey RX with RS232C Green TX with RS232C Blue Ground Pink Supply voltage 5 28 VDC Brown RXD TTL level White TXD TTL level Yellow External power control TTL level 1 off 0 on NOTE The two output protocols cannot be used simultaneously Connect either RX TX or RXD TXD wires It is recommended to isolate the free wire ends 12 M210669EN D Chapter 4 Operating CHAPTER 4 OPERATING General The PTB210 series barometers can be operated through a serial line by using s
18. ollow instructions very carefully at this point there is a risk of injury or even death CAUTION Caution warns you of a potential hazard If you do not read and follow instructions carefully at this point the product could be damaged or important data could be lost NOTE Note highlights important information on using the product Feedback Vaisala Customer Documentation Team welcomes your comments and suggestions on the quality and usefulness of this publication If you find errors or have other suggestions for improvement please indicate the chapter section and page number You can send comments to us by e mail manuals vaisala com VAISALA 3 User s Guide Recycling fs Recycle all applicable material Dispose of batteries and the unit according to statutory regulations Do not dispose of with regular household refuse Trademarks BAROCAP is a registered trademark of Vaisala License Agreement All rights to any software are held by Vaisala or third parties The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement 4 M210669EN D Chapter 1 General Information Warranty Vaisala hereby represents and warrants all Products manufactured by Vaisala and sold hereunder to be free from defects in workmanship or material during a period of twelve 12 months from the date of del
19. ommended NOTE Calibration is considered not to involve any adjustments The pressure readjustment of a PTB210 series digital barometer is performed by deactivating first the multi point corrections using MPCOFF command All fine adjustments are then deactivated By comparing the output to a reference the user can define the corrections required for readjustment It is advisable to write down the previous multi point corrections so that they will not be lost by mistake The corrections are given by using the Wizard software available for download at http www vaisala com PTB210Wizard When the new multi point corrections have been entered to the barometer the corrections are activated either with the Wizard or with the MPCON command Finally the barometer is calibrated to verify its real accuracy VAISALA 21 User s Guide Wizard Software The user friendly Wizard software is designed to work in WIN3 X WIN9S and NT environment The multi point pressure corrections for the PTB210 barometers are given through the serial line by using this program Moreover a few settings of the instrument can be changed using the Wizard Operation First check that the terminal software in use is closed before operating the Wizard NOTE The Wizard uses either RS232 or 5485 interface If the TTL level interface is used disconnect the RXD TXD wires and then connect the RX TX wires see page 12 22
20. parameters is E71 E71 lt cr gt or O71 lt cr gt or N81 lt cr gt The command sets the serial communication parameters of either a single barometer or all the barometers in NOTE To activate the new settings please remember to reset the barometer with the command RESET lt cr gt 14 M210669EN D Chapter 4 Operating ID Setting a Identification Code AD xxx lt cr gt XXX identification code max 15 characters If there are several barometers on same line it is necessary to use the ID code in order to direct the command for a specific instrument NOTE As default the ID code is 0 When several barometers will be used on same line the codes have to be set before hand separately for each instrument The barometer handles the ID code as characters i e 0001 01 and 1 are different codes Setting Pressure Limits If desired a lower and a higher pressure limits can be given to the barometer The limits can be used to define e g the calibrated pressure range to a host system PMIN xxxx lt cr gt XXXX lower pressure limit 0 15000 hPa If current pressure is under the limit the barometer outputs in stead of the pressure reading PMAX xxxx lt cr gt XXXX higher pressure limit If current pressure is over the limit the barometer outputs in stead of the pressure reading NOTE To activate the new settings please rememb
21. ticular purpose and all other obligations and liabilities of Vaisala or its representatives with respect to any defect or deficiency applicable to or resulting directly or indirectly from the Products supplied hereunder which obligations and liabilities are hereby expressly cancelled and waived Vaisala s liability shall under no circumstances exceed the invoice price of any Product for which a warranty claim is made nor shall Vaisala in any circumstances be liable for lost profits or other consequential loss whether direct or indirect or for special damages User s Guide This page intentionally left blank 6 M210669EN D Chapter 2 Product description CHAPTER 2 PRODUCT DESCRIPTION The PTB210 series digital barometers are designed for various pressure ranges The barometers with serial output are available with two basic configurations serial output for 500 1100 hPa and 50 1100 hPa The PTB210 barometers are also available with an analog output with different scalings The PTB210 series barometers offer an excellent solution for outdoor installations They operate in a wide temperature range The housing of the barometer electronics provides an IP65 standardized protection against sprayed water The rugged corrosion resistant housing in combination with the small size facilitates easy installation and a long lifetime for the barometer All the barometers are digitally adjusted and calibrated by using electron
22. uitable terminal software like Windows Hyper Terminal and the commands given in following pages The format of the commands is ZZZ xxx lt cr gt where ZZZ defines an event and xxx is the given value of a parameter When there are several barometers on same line it is necessary to use an instrument specific identification code in front of the command e g 123 BAUD 9600 lt cr gt where 123 is the ID code see page 15 The code directs the command to that specific instrument This prevents any inconsistency between the barometers and the host system A barometer reacts only to a command with its ID or the one that is given without the code Common setting commands can be given without the ID code i e settings are given to all barometers simultaneously NOTE The barometer does not echo the given commands nor confirm the new settings by echoing them However the settings can be checked with the command lt cr gt VAISALA 13 User s Guide Settings BAUD Setting the Baud Rate BAUD xxxx lt cr gt XXXX baud rate 1200 19200 Example BAUD 9600 lt cr gt commands invisible RESET lt cr gt NOTE To activate the new settings please remember to reset the barometer with the command RESET lt cr gt Setting the Serial Communication Parameters The following parameter combinations are available with the PTB210 digital barometers The factory setting for the
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VAISALA PTB210 (serial) User Guide