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Vaisala PTB220 Series User Manual

Summary of PTB220 Series

  • Page 1

    Ptb220 series digital barometers u ser ' s g uide m210194 en -a august 2001.

  • Page 3: Table of Contents

    _________________________________________________________________________c ontents v aisala ___________________________________________________________________________ i table of contents chapter 1 general information.............................................................1 safety ................

  • Page 4

    U ser ' s g uide _______________________________________________________________________ ii _____________________________________________________________________ m210194 en -a track setting the pressure tracking mode on/off.................. 46 plim pressure limit listing...............................

  • Page 5

    _________________________________________________________________________c ontents v aisala __________________________________________________________________________ iii appendix f multiple ptb220 barometers on rs232c.......................91 appendix g optional rs485/422 interface of ptb220 barome...

  • Page 7: Chapter 1

    C hapter 1_______________________________________________________ g eneral i nformation v aisala __________________________________________________________________________ 1 chapter 1 general information safety throughout the manual important instructions regarding the safety considerations are focu...

  • Page 8: Warranty

    U ser ' s g uide _______________________________________________________________________ 2 ____________________________________________________________________ m210194 en -a warranty vaisala hereby represents and warrants all products manufactured by vaisala and sold hereunder to be free from defect...

  • Page 9: Chapter 2

    C hapter 2___________________________________________________ product description v aisala __________________________________________________________________________ 3 chapter 2 product description introduction the ptb220 series barometers are fully compensated digital barometers designed to cover a...

  • Page 10: Barocap

    U ser ' s g uide _______________________________________________________________________ 4 ____________________________________________________________________ m210194 en -a the ptb220 series digital barometers are available with one, two or three pressure transducers. Although one pressure transduc...

  • Page 11

    C hapter 2___________________________________________________ product description v aisala __________________________________________________________________________ 5 thin film metallization silicon vacuum gap silicon glass silicon diaphragm f igure 2-1 the barocap ® pressure sensor the barocap ® p...

  • Page 12: Measurement Principle

    U ser ' s g uide _______________________________________________________________________ 6 ____________________________________________________________________ m210194 en -a measurement principle the measurement principle of the ptb220 series digital barometers is based on an advanced rc oscillator ...

  • Page 13: Block Diagram

    C hapter 2___________________________________________________ product description v aisala __________________________________________________________________________ 7 block diagram the ptb220 series digital barometers consist of a cpu board and 1, 2 or 3 pressure transducers (p1, p2 and p3). The nu...

  • Page 15: Chapter 3

    C hapter 3___________________________________________________________ g etting started v aisala __________________________________________________________________________ 9 chapter 3 getting started as the ptb220 series digital barometers always have an rs 232c serial interface, the user is requeste...

  • Page 16

    U ser ' s g uide _______________________________________________________________________ 10 ___________________________________________________________________ m210194 en -a the factory settings of the ptb220 series barometers are the following: t able 3-1 serial interface factory settings baud rate...

  • Page 17: Chapter 4

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 11 chapter 4 commissioning t able 4-1 summarizes the commands used to commission the ptb220 series digital barometers. The commands...

  • Page 18: Operating Modes

    U ser ' s g uide _______________________________________________________________________ 12 ___________________________________________________________________ m210194 en -a operating modes the first thing to do is to select the desired sending mode for the barometer. This is done with the command s...

  • Page 19

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 13 note remember to give the reset command to initialize the new sending mode. Mmode selecting the measurement mode mmode x where: ...

  • Page 20

    U ser ' s g uide _______________________________________________________________________ 14 ___________________________________________________________________ m210194 en -a mtim : 32 >filt off filter : off >reset note remember to give the reset command to initialize the new measurement mode. The me...

  • Page 21

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 15 note the pulse output mode can be used with hpa/mbar pressure units only! Example of software settings for the pulse output mode...

  • Page 22: Software Settings

    U ser ' s g uide _______________________________________________________________________ 16 ___________________________________________________________________ m210194 en -a software settings seri serial bus settings seri b p d s x where: (* = factory setting) b = baud rate (300, 600, 1200, 2400, 48...

  • Page 23

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 17 the rs485/422 interface of the ptb220 series digital barometers is a non-isolated two-wire half-duplex interface. See page 93 fo...

  • Page 24

    U ser ' s g uide _______________________________________________________________________ 18 ___________________________________________________________________ m210194 en -a pressure quantities p1 (reading of the transducer 1), p2 (transducer 2), p3 (transducer 3), p (average) height corrected press...

  • Page 25

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 19 examples of different ways of setting the output format: 1. To output the pressure reading. >form 4.2 p " " uuuu #r #n ? >send 1...

  • Page 26

    U ser ' s g uide _______________________________________________________________________ 20 ___________________________________________________________________ m210194 en -a 6. To output the average pressure reading in the units of inhg . >form 4.2 p " " uuu #r #n ? 2.4 p " " uuuu #r #n >unit inhg p...

  • Page 27

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 21 >form 4.2 p " " uuuu #r #n ? 4.2 p1 " " p2 " " p3 " " p " " uuu " " err #r #n >send 1020.30 1020.31 1020.32 1020.31 hpa 000 >sen...

  • Page 28

    U ser ' s g uide _______________________________________________________________________ 22 ___________________________________________________________________ m210194 en -a eform defining the error output format eform the eform command is used to define the user specific error output format for the...

  • Page 29

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 23 *) the ptb220 barometer cannot output + sign for pressure trend or temperature reading; a space is output instead. There are two...

  • Page 30

    U ser ' s g uide _______________________________________________________________________ 24 ___________________________________________________________________ m210194 en -a the ptb220 series barometers will show * instead of numeric values for pressure trend and pressure tendency for three hours fr...

  • Page 31

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 25 unit setting the pressure and temperature units unit x where (* = factory setting) x = hpa* kpa pa mbar inhg mmhg torr mmh 2 o p...

  • Page 32

    U ser ' s g uide _______________________________________________________________________ 26 ___________________________________________________________________ m210194 en -a where: p = measured pressure 0.1176 = constant h = height example of setting the height: >hhcp height of hcp : ? -30 > avrg se...

  • Page 33

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 27 intv setting the output interval intv x y where: x = output interval (0...255) y = unit (s, min, h) this command is used to set ...

  • Page 34

    U ser ' s g uide _______________________________________________________________________ 28 ___________________________________________________________________ m210194 en -a >addr 7 address : 7 > a new address replaces the previous one. Always set the address to 0 when no address is needed: >addr 0 ...

  • Page 35

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 29 example of defining a similar command without an end character: >scom "p" #r ? "p" >p1020.30 hpa > any previous scom definition ...

  • Page 36

    U ser ' s g uide _______________________________________________________________________ 30 ___________________________________________________________________ m210194 en -a fluctuations, and for example opening the door of a room will often result in temporary pressure instability. Plarm setting th...

  • Page 37

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 31 x = pressure reading (in current unit) this command is used to define the maximum pressure difference between the pressure readi...

  • Page 38

    U ser ' s g uide _______________________________________________________________________ 32 ___________________________________________________________________ m210194 en -a > >form 4.2 p " " uuuu #r #n ? 4.2 p1 " " p2 " " p3 " " p " " uuu " " err #r #n >send 1020.30 1020.31 1020.32 1020.31 hpa 000 ...

  • Page 39: Hardware Settings

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 33 ent cl hardware settings inside the barometer, there is the connector x15 (see f igure 4-2 ) and the dip switch s1 (see f igure ...

  • Page 40

    U ser ' s g uide _______________________________________________________________________ 34 ___________________________________________________________________ m210194 en -a an external power control can be used to switch the ptb220 barometer on / off . The control is activated with the switch sw2 i...

  • Page 41

    C hapter 4_____________________________________________________________ commissioning v aisala _________________________________________________________________________ 35 t able 4-2 summarized settings of the dip switch s1. Sw1 off on not used sw2 off on external power control off (ttl: 0 vdc) exte...

  • Page 43: Chapter 5

    C hapter 5_______________________________________________________________ installation v aisala _________________________________________________________________________ 37 chapter 5 installation mounting in automatic weather station applications and in other harsh operating environments, the ptb220...

  • Page 44: Electrical Connections

    U ser ' s g uide _______________________________________________________________________ 38 ___________________________________________________________________ m210194 en -a 120 65 133 145 104 120 ø6.5 f igure 5-1 dimensions and mounting positions of ptb220 barometers electrical connections in barom...

  • Page 45

    C hapter 5_______________________________________________________________ installation v aisala _________________________________________________________________________ 39 t able 5-2 pin assignment for rs 232c/485/422 pin signal 1 tx with diode 2 tx/txd/txd inverted 3 rx/rxd/rxd inverted 4 external...

  • Page 46: Grounding

    U ser ' s g uide _______________________________________________________________________ 40 ___________________________________________________________________ m210194 en -a the two-wire half duplex rs 485/422 serial interface is the recommended way of connecting the ptb220 series barometers with ot...

  • Page 47: Pressure Connections

    C hapter 5_______________________________________________________________ installation v aisala _________________________________________________________________________ 41 the ptb220 series digital barometers comply with the ce norms for electromagnetic compatibility provided that braided cable and...

  • Page 49: Chapter 6

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 43 chapter 6 operating only a few commands are needed to operate a ptb220 barometer in the run, stop and poll modes. In the send mod...

  • Page 50: S Stopping The Output

    U ser ' s g uide _______________________________________________________________________ 44 ___________________________________________________________________ m210194 en -a t able 6-1 commands used in run and stop modes function command starting output r stopping output s single message output send...

  • Page 51: V Verification Message

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 45 send outputting a single message only send this command is used to output one message at a time in the stop and run modes. Exampl...

  • Page 52: Plim Pressure Limit Listing

    U ser ' s g uide _______________________________________________________________________ 46 ___________________________________________________________________ m210194 en -a >dnos err > track setting the pressure tracking mode on/off track the track command is used to activate or deactivate the mini...

  • Page 53

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 47 example: >track off min/max track.: off >plim stab. Level : 0.50 hpa max : off min : off hi alarm : 1100.00 hpa lo alarm : 500.00...

  • Page 54: Poll Mode

    U ser ' s g uide _______________________________________________________________________ 48 ___________________________________________________________________ m210194 en -a poll mode t able 6-2 summarizes the commands used in the poll mode. The commands are not case sensitive. T able 6-2 commands u...

  • Page 55: Mode

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 49 open setting a barometer from poll mode to stop mode close setting a barometer from stop mode to poll mode open a close where: a ...

  • Page 56: Send Mode

    U ser ' s g uide _______________________________________________________________________ 50 ___________________________________________________________________ m210194 en -a example of closing a barometer: >close line closed send mode in the send mode the barometer will automatically output one mess...

  • Page 57: Pulse Mode

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 51 pulse mode in the pulse output mode, the barometer requires a trigger pulse from the host system. In this case, the barometer mus...

  • Page 58

    U ser ' s g uide _______________________________________________________________________ 52 ___________________________________________________________________ m210194 en -a 5. Use ent key to acknowledge a selection. The selected characters then move one step to the left and the next character can b...

  • Page 59

    C hapter 6________________________________________________________________ operating v aisala _________________________________________________________________________ 53 f igure 6-1 available functions and selections of the local display see chapter software settings for more information on: - aver...

  • Page 60

    U ser ' s g uide _______________________________________________________________________ 54 ___________________________________________________________________ m210194 en -a - serial interface setting (see seri command) - pressure and temperature unit setting (see unit command). See chapter 3.1 oper...

  • Page 61: Chapter 7

    C hapter 7__________________________________________________ adjustment and calibration v aisala _________________________________________________________________________ 55 chapter 7 adjustment and calibration introduction the ptb220 series digital barometers can be fine adjusted and calibrated aga...

  • Page 62

    U ser ' s g uide _______________________________________________________________________ 56 ___________________________________________________________________ m210194 en -a given in the calibration certificate together with a description of the international pressure traceability chain. In calibrat...

  • Page 63

    C hapter 7__________________________________________________ adjustment and calibration v aisala _________________________________________________________________________ 57 t able 7-1 adjustment and calibration commands (*only with the optional analog output) function command listing corrections co...

  • Page 64

    U ser ' s g uide _______________________________________________________________________ 58 ___________________________________________________________________ m210194 en -a in case of one transducer, the listing looks as follows: >corr linear adjustments off multipoint adjustments on reading correc...

  • Page 65: Lc Linear Corrections

    C hapter 7__________________________________________________ adjustment and calibration v aisala _________________________________________________________________________ 59 lc linear corrections lc x where: x = on or off the lc command is used to activate or deactivate the linear offset or offset/g...

  • Page 66: Mpc Multipoint Corrections

    U ser ' s g uide _______________________________________________________________________ 60 ___________________________________________________________________ m210194 en -a mpc multipoint corrections mpc x where: x = on or off the mpc command is used to activate or deactivate the multipoint correct...

  • Page 67: Offset and Gain Adjustment

    C hapter 7__________________________________________________ adjustment and calibration v aisala _________________________________________________________________________ 61 offset and gain adjustment lci entering linear corrections lci n where: n = number of the pressure transducer (1, 2 or 3) the ...

  • Page 68: Multipoint Adjustment

    U ser ' s g uide _______________________________________________________________________ 62 ___________________________________________________________________ m210194 en -a note always remember to return the switch sw4 to write disable position (off). Multipoint adjustment mpci entering multipoint ...

  • Page 69: Calibration

    C hapter 7__________________________________________________ adjustment and calibration v aisala _________________________________________________________________________ 63 correction ? -0.08 p1 3. Reading ? 698.71 correction ? -0.01 p1 4. Reading ? 801.12 correction ? -0.01 p1 5. Reading ? 900.61 ...

  • Page 70

    U ser ' s g uide _______________________________________________________________________ 64 ___________________________________________________________________ m210194 en -a cald storing the new date of calibration cald yyyy-mm-dd this command is used to store the new valid date of calibration in th...

  • Page 71: Chapter 8

    C hapter 8____________________________________________ self - testing and problem handling v aisala _________________________________________________________________________ 65 chapter 8 self-testing and problem handling returning the serial communication parameters as the barometer software and har...

  • Page 72: Diagnostic Commands

    U ser ' s g uide _______________________________________________________________________ 66 ___________________________________________________________________ m210194 en -a t able 8-1 serial interface factory settings baud rate 9600 parity even data bits 7 stop bits 1 duplex full duplex diagnostic ...

  • Page 73: Vers Software Version

    C hapter 8____________________________________________ self - testing and problem handling v aisala _________________________________________________________________________ 67 output format 4.2 p " " uuuu #r #n error output format scom format pressure unit hpa temperature unit 'c averaging time 1.0...

  • Page 74

    U ser ' s g uide _______________________________________________________________________ 68 ___________________________________________________________________ m210194 en -a >errs e00 nothing special to report > complete list of error codes: e00 nothing special to report e10 cpu eeprom ackn. Error e...

  • Page 75

    C hapter 8____________________________________________ self - testing and problem handling v aisala _________________________________________________________________________ 69 c n listing transducer coefficients c n where n = number of the pressure transducer (1, 2 or 3) the c n command is used to ...

  • Page 76

    U ser ' s g uide _______________________________________________________________________ 70 ___________________________________________________________________ m210194 en -a the response to the ptest command in the serial interface consists of the pressure reading, pressure reading corrected with de...

  • Page 77: Chapter 9

    C hapter 9____________________________________________________ technical specifications v aisala _________________________________________________________________________ 71 chapter 9 technical specifications barometric pressure operating range pressure range s 50...1100 hpa, 500...1100 hpa temperat...

  • Page 78: General

    U ser ' s g uide _______________________________________________________________________ 72 ___________________________________________________________________ m210194 en -a *** defined as the root sum of the squares (rss) of end-point non- linearity, hysteresis error, repeatability error and calibr...

  • Page 79: Mechanics

    C hapter 9____________________________________________________ technical specifications v aisala _________________________________________________________________________ 73 mechanics pressure connector m5 (10-32) internal thread pressure fitting barbed fitting for 1/8" i.D. Tubing maximum pressure ...

  • Page 80: Options

    U ser ' s g uide _______________________________________________________________________ 74 ___________________________________________________________________ m210194 en -a en 61326-1:1997 +am 1:1998, electrical equipment for measurement, control and laboratory use - emc requirements; generic envir...

  • Page 81

    C hapter 9____________________________________________________ technical specifications v aisala _________________________________________________________________________ 75 25328 quick coupling 25329 tube fitting the ptb220case kit includes an oak case, a sealed lead acid battery and recharging ele...

  • Page 83

    A ppendix a __________________________________________________ hardware configurations v aisala _________________________________________________________________________ 77 appendix a hardware configurations f igure a-1 configuration with one pressure transducer f igure a-2 configuration with two pr...

  • Page 84

    U ser ' s g uide _______________________________________________________________________ 78 ___________________________________________________________________ m210194 en -a f igure a-3 configuration with three pressure transducers f igure a-4 configuration with two pressure transducers and two pres...

  • Page 85: Appendix B Pin Assignments

    A ppendix b ___________________________________________________________ pin assignments v aisala _________________________________________________________________________ 79 appendix b pin assignments the pin assignment of the 9-pin female subd-connector of the ptb220 series digital barometers seen ...

  • Page 86

    U ser ' s g uide _______________________________________________________________________ 80 ___________________________________________________________________ m210194 en -a in barometers with rs232/analog output, the pin assignment is as follows. Pin signal 1 tx with diode 2 tx/txd/txd inverted 3 r...

  • Page 87

    A ppendix c __________________________________________ rs232c/ttl level serial interface v aisala _________________________________________________________________________ 81 appendix c rs232c/ttl level serial interface the appendix c shows connection of handshaking lines and the wave forms, voltage...

  • Page 88

    U ser ' s g uide _______________________________________________________________________ 82 ___________________________________________________________________ m210194 en -a the next picture (below) shows a typical rs232c tx output signal (upper signal) and ttl level serial txd output signal (lower ...

  • Page 89

    A ppendix d ____________________________________________________ pulse output mode v aisala _________________________________________________________________________ 83 appendix d pulse output mode note the pulse output mode can be used with hpa/mbar pressure units only. The pulse output mode of the...

  • Page 90

    U ser ' s g uide _______________________________________________________________________ 84 ___________________________________________________________________ m210194 en -a the figure below illustrates in practice the falling edge of the trigger pulse (lower signal) and the start of pulse outputtin...

  • Page 91

    A ppendix d ____________________________________________________ pulse output mode v aisala _________________________________________________________________________ 85 at 1100 hpa/mbar pressure. The gate-open time could be 0.5 ... 1 second. The pulse output mode settings must be made on two levels:...

  • Page 92

    U ser ' s g uide _______________________________________________________________________ 86 ___________________________________________________________________ m210194 en -a >pulse on slow low 0.0 >ptest 1000 (outputting pre-defined pressure 1000.0 hpa) 1000.000 1000.000 10000 >pulse slow low -800 o...

  • Page 93: Appendix E Analog Output

    A ppendix e ___________________________________________________________ a nalog output v aisala _________________________________________________________________________ 87 appendix e analog output the optional analog output module has two selectable operating modes: current (4...20ma) and voltage (...

  • Page 94

    U ser ' s g uide _______________________________________________________________________ 88 ___________________________________________________________________ m210194 en -a examples of setting the pressure limits: >ascl p low : 500 ? 800 (0v/4ma = 800 hpa) p high : 1100 ? 1100 (5v/20ma = 1100 hpa) ...

  • Page 95

    A ppendix e ___________________________________________________________ a nalog output v aisala _________________________________________________________________________ 89 1. Open the cover of the barometer and set the dip switch sw4 to upward position (on). 2. Use the serial line to give the comma...

  • Page 96: Pin Assignment

    U ser ' s g uide _______________________________________________________________________ 90 ___________________________________________________________________ m210194 en -a 9. Remember to restore the dip switch sw4 (off). Note entering new linear corrections will always cancel the previous correcti...

  • Page 97: Rs232C

    A ppendix f _________________________________ multiple ptb220 barometers on rs 232 c v aisala _________________________________________________________________________ 91 appendix f multiple ptb220 barometers on rs232c it is possible to connect multiple ptb220 series digital barometers on one rs232c...

  • Page 99: Ptb220 Barometers

    A ppendix g ______________________o ptional rs485/422 interface of ptb 220 barometers v aisala _________________________________________________________________________ 93 appendix g optional rs485/422 interface of ptb220 barometers the two-wire non-isolated half duplex rs 485/422 serial interface i...

  • Page 100

    U ser ' s g uide _______________________________________________________________________ 94 ___________________________________________________________________ m210194 en -a >addr 7 (select address of the barometer) address : 7 >smode poll (select the poll mode) serial mode : poll >reset (resetting ...

  • Page 101

    A ppendix g ______________________o ptional rs485/422 interface of ptb 220 barometers v aisala _________________________________________________________________________ 95.

  • Page 103

    A ppendix h _______________________________________________ serial interface commands v aisala _________________________________________________________________________ 97 appendix h serial interface commands commissioning commands function command sending mode smode measurement mode mmode pulse mod...

  • Page 104

    U ser ' s g uide _______________________________________________________________________ 98 ___________________________________________________________________ m210194 en -a maintenance commands function command listing linear and multipoint corrections corr linear corrections on/off lc on/off enter...

  • Page 105: Appendix I

    A ppendix i ________________________________________________________________ che cksum v aisala _________________________________________________________________________ 99 appendix i checksum with a checksum form the user can check that the data sent by the barometer has not changed in transfer lin...

  • Page 107: Appendix J

    A ppendix j ____________________________________________________pressure tendency v aisala ________________________________________________________________________ 101 appendix j pressure tendency the world meteorological organization (wmo) publication manual on codes vol. I.1, international codes, ...

  • Page 108: Appendix K Error Messages

    U ser ' s g uide _______________________________________________________________________ 102 __________________________________________________________________ m210194 en -a appendix k error messages the error/alarm messages of the ptb220 series digital barometers are: err / pass (see dnos command) ...

  • Page 109: P Mode

    A ppendix l ____________________________________________________ special emulation m ode v aisala ________________________________________________________________________ 103 appendix l special emulation mode the ptb220 series digital barometers can partially emulate the pa11a and the setra 470 digi...

  • Page 110: Automode

    U ser ' s g uide _______________________________________________________________________ 104 __________________________________________________________________ m210194 en -a p a p a p a p a p a average pressure based on three consequent measurements of each transducer included, e.G. Pressure average...

  • Page 111

    A ppendix l ____________________________________________________ special emulation m ode v aisala ________________________________________________________________________ 105 setra 470 a limited subset of commands is available provided that the switch sw7 is set as in f igure l-3 . On off sw1 sw2 sw...

  • Page 112

    U ser ' s g uide _______________________________________________________________________ 106 __________________________________________________________________ m210194 en -a the output after the -7777s command is: ref x.Yy where the x.Yy is the software version code. The output after the -8888ss tes...

  • Page 113

    A ppendix m ________________________________________________ p ressure conversion chart v aisala ________________________________________________________________________ 107 appendix m pressure conversion chart pressure conversion chart multiplication factors note: conversions for mmhg and inhg are ...