Vaisala HMP243 Guia do Utilizador

HMP240 SERIESTRANSMITTERSUser's GuideM210300en-AJune 2002

HMP240User's Guide M210300en83. INSTALLATION3.1 Selecting the place of installationThe transmitter should be installed in a place that gives a

HMP240Appendix 2: RS 485/422 serial port module M210300en98NOTE 2The transmitter outputs no prompt (>) after the SMODEPOLL command and it only reac

HMP240M210300en Appendix 2: RS 485/422 serial port module994. CHECKING THE SERIAL PORT NETWORK OPERATIONMeasurement readings are normally

HMP240Appendix 2: RS 485/422 serial port module M210300en1004.2 POLL modeIf a transmitter has been set to POLL mode, it will respond only to commands

HMP240M210300en Appendix 2: RS 485/422 serial port module1015. SPECIFICATIONSConnections Berg socketson the main board screw terminals 0.5

HMP240Appendix 3: Digital current loop module M210300en102APPENDIX 3: INSTALLING AND USING THE DIGITAL CURRENTLOOP MODULEINSTALLATIONSwitch the transm

HMP240M210300en Appendix 3: Digital current loop module103Unregulated AC/DC adapter can be used, if the current is limited to 20 mA atleast by a seri

HMP240Appendix 3: Digital current loop module M210300en104incorrectly, the voltage drop from RX+ to RX- or from TX+ to TX- is below 1V and the transmi

HMP240M210300en Appendix 3: Digital current loop module105Single loop wiring• Set the address of the transmitter; you can choose any numberbetween 1

HMP240Appendix 3: Digital current loop module M210300en106• Set the serial port of the terminal to 4800 baud, even parity, sevendata bits and one stop

HMP240M210300en Appendix 3: Digital current loop module107>send 22RH= 24.4 %RH T= 29.1 'C• Disconnect the terminal.• Remount the digital curr

HMP240 seriesM210300en User's Guide93.2 Mounting3.2.1 Mounting the HMP243Cable length 2000, 5000 or 10000 mmT-sensor head(optional)humiditysenso

HMP240Appendix 3: Digital current loop module M210300en108 Ch2 ( T ) hi 180.000 'CTransducer :PRB serial nr : 0Calibr. date : 0When the neces

HMP240M210300en Appendix 3: Digital current loop module109SpecificationsGalvanic isolation 1500 VAC/DC max. (1 min)Loop supply voltage 40 V max.Loop

HMP240Appendix 6: HMP243 wiring diagram M210300en110APPENDIX 4: ERROR MESSAGES1.1 Errors after reset ...

HMP240M210300en Appendix 5: Calculation formulas1111. ERROR TYPESThe HMP240 transmitter goes through a self-diagnostics procedure when thepower is s

HMP240Appendix 6: HMP243 wiring diagram M210300en112E21 PRB EEPROM ackn. error- no connection to the EEPROM including calibration information can befo

HMP240M210300en Appendix 5: Calculation formulas113E41 f (T) out of range- the temperature measurement cannot be completed. Check the temperaturese

HMP240Appendix 6: HMP243 wiring diagram M210300en114- the humidity measurement cannot be completed. Check the HUMICAPsensor and humidity measurement w

HMP240M210300en Appendix 5: Calculation formulas115(TP5,TP6,TP7 and TP8 for the humidity probe and TP1, TP3 and TP4 for theadditional temperature pro

HMP240Appendix 6: HMP243 wiring diagram M210300en116APPENDIX 5: CALCULATION FORMULASThe HMP240 transmitter measures relative humidity and temperature.

HMP240M210300en Appendix 5: Calculation formulas117∑−=Θ+Θ=314lnlniiiwsbbPwhere: bi= coefficientsb-1= -0.58002206 * 104b0= 0.13914993 * 101b1= -0.48

HMP240-seriesUser's Guide M210300en10a plugged hole for referencemeasurementsT-sensor head(optional)humidity sensor headduct wallsealing (silicon

HMP240Appendix 6: HMP243 wiring diagram M210300en118APPENDIX 6: HMP240 WIRING DIAGRAMJumper selections in connector X15Current 0...20 mA/4...20 mACh1

HMP243M210300en Appendix 7: Re-gaining119APPENDIX 7: RE-GAINING1. GENERAL...

HMP240Appendix 7: Re-gaining M210300en1201. GENERALIn some specific applications the sensor gain may decrease gradually due to aninterferen

HMP243M210300en Appendix 7: Re-gaining1212. TO BE NOTED IN RE-GAININGRe-gaining cannot be started automatically or manually unless thesecuri

HMP240Appendix 7: Re-gaining M210300en1223. LED COMMANDSRe-gaining can be started manually using the LED command ll¡¡ (l = lit, ¡ = dark).

HMP243M210300en Appendix 7: Re-gaining1234. DISPLAY/KEYPAD COMMANDSDisconnect the security lock jumper!Press the CL key to enter the comman

HMP240Appendix 7: Re-gaining M210300en124Use arrow keys to change the status of the automatic re-gaining and pressENT.Acknowledge the current setting

HMP243M210300en Appendix 7: Re-gaining1255. SERIAL COMMANDS1.2.1 REG Re-gaining settingsREG <cr>REG nnn <cr>nnn = ON or OFFComma

HMP240Appendix 7: Re-gaining M210300en1261.2.3 CRI Changing re-gaining parametersCRI <cr>With command CRI the values of the re-gaining parameter

HMP243M210300en Appendix 7: Re-gaining127Example: activating status display>fst onForm. status : ON>r N 0 RH= 20.8 %RH T= 25.6 'C N =

HMP240 seriesM210300en User's Guide113.2.2 Mounting the HMP247HMP247 has a small size probe made of stainless steel. The sensor headwithstands t

HMP240Appendix 7: Re-gaining M210300en128Example:>regen Regeneration started, press any key to abort>r S 162 RH= 20.0 %RH T= 26.5 'C heati

HMP240User's Guide M210300en12Pressure tight installation with Vaisala's supportive thread barset HMP247TBS (cable gland HMP247CG included)E

HMP240 seriesM210300en User's Guide133.3 GroundingA single electrical cable with a screen and three to ten wires is recommendedfor power and ana

HMP240User's Guide M210300en14• tighten the nut• connect the wires into the screw terminals and fasten a cable tiearound the wirestransmitter hou

HMP240 seriesM210300en User's Guide153.4 Electrical connectionsVmA+ -CURRENT/VOLTAGEOUTPUTSCH1+CH1-CH2+CH2-24 V +OPENED COVER OF THEX2X1VmA+ -C

HMP240User's Guide M210300en163.4.1 Connection to a 24 VAC supplyThe HMP240 transmitter can also be connected to a 24 VAC supply withoutan exter

HMP240 seriesM210300en User's Guide174. COMMISSIONINGWhen the HMP240 transmitter leaves the factory, its measurement ranges andoutput signals ha

Vaisala Oyj 2002No part of this document may be reproduced in any form or by any means,electronic or mechanical (including photocopying), nor may it

HMP240User's Guide M210300en18OPENED COVER OF THE HMP 243X15CHANGE OF SETTINGSDISABLEDFigure 4.1 Location of the security lock jumperWhen the sec

HMP240 seriesM210300en User's Guide19CH2 CURRENT OUTPUTCH1 0 ... 1 VOLTAGE OUTPUTOPENED COVER OF THE HMP 243CH1CH2CH2CH1X15CURRENT OUTPUTS0 ... 2

HMP240User's Guide M210300en20OPENED COVER OF THE HMP 243X55spare jumpersFigure 4.3 Spare jumpers4.4 Connecting the RS 232C serial busRXGNDTXNCO

HMP240 seriesM210300en User's Guide21253372372TXGNDRXTXGNDRXTXGNDRXHMP 243D9SD25SD25PPCTXDRXDTXDTXDRXDRXD467856820TERMINALFigure 4.5 Connection o

HMP240User's Guide M210300en22In calibrating or changing the settings of the transmitter it can be more con-venient to use the connector X17, if

HMP240 seriesM210300en User's Guide23When the jumper is inserted the serial line factory settings become valid, butonly temporarily. The transmi

HMP240User's Guide M210300en245. COMMANDSAs the HMP240 transmitter is a microprocessor based device, its configurationcan be set to correspond t

HMP240 seriesM210300en User's Guide255.2 LED commandsNOTEIf the transmitter has a display/keypad cover, the LEDcommands cannot be used.LED comma

HMP240User's Guide M210300en265.3 Display/keypad commands5.3.1 Display modeIn the display mode the transmitter outputs measurements on the disp

HMP240 seriesM210300en User's Guide275.3.4 Analogue output commands5.3.4.1 Selecting the output (mA/V)Disconnect the security lock jumper!• Sel

HMP240 seriesM210300en User's guideiContents1. PRODUCT DESCRIPTION...

HMP240User's Guide M210300en285.3.4.2 Selecting and scaling the analogue output quantitiesDisconnect the security lock jumper!• Select Mode in

HMP240 seriesM210300en User's Guide295.3.5 Output via the serial bus5.3.5.1 Turning the serial interface echo ON/OFF• Select More in the main m

HMP240User's Guide M210300en30Selecting stop bits:Full duplex/half duplex:The processor does not allow the following combinations:• no parity, 7

HMP240 seriesM210300en User's Guide315.3.5.4 Selecting the output units• Select Unit in the main menu:• Use the arrow keys to select the right a

HMP240User's Guide M210300en32When the connection to a given transmitter is opened in the POLL mode, thetransmitter goes into STOP mode and can t

HMP240 seriesM210300en User's Guide335.3.7 Others5.3.7.1 Setting the averaging timeDisconnect the security lock jumper!With command FILT the tr

HMP240User's Guide M210300en345.3.7.3 Setting the date• Select More in the main menu; select Date in the More menu:• If the date is correct, ack

HMP240 seriesM210300en User's Guide355.3.7.5 Heat on / heat off commandThe status of this command should always be HEAT ON, and it should not be

HMP240User's Guide M210300en365.4.1.2 Selecting and scaling the analogue output quantitiesDisconnect the security lock jumper!ASEL xxx yyy <

HMP240 seriesM210300en User's Guide375.4.2.3 Outputting the reading onceSEND <cr> in STOP modeorSEND aa <cr> in POLL modeaa = add

HMP240 seriesUser's guide M210300enii5.4.2 Output via the serial bus... 365.4.2.1 S

HMP240User's Guide M210300en38>SERI O <cr> changing parity only4800 O 7 1 HDX>SERI 600 N 8 1 F <cr> changing all parameters600

HMP240 seriesM210300en User's Guide39The time can be set in seconds within the range of 0 - 1024 (0 = no averagingtime).For example:>FILTFilte

HMP240User's Guide M210300en405.4.3 Operating the transmitter via the serial bus5.4.3.1 Setting the serial interfaceSMODE xxxx<cr>xxxx =

HMP240 seriesM210300en User's Guide415.4.3.2 OPEN & CLOSEOPEN nn <cr>nn = address of the transmitter (0...99)CLOSE <cr>In STOP

HMP240User's Guide M210300en426. CALIBRATIONThe HMP240 transmitter has been fully calibrated at the factory so thereshould be no immediate need

HMP240 seriesM210300en User's Guide43A ∅ 13.5 mm adapter must be used when calibrating with the HMK13Bcalibrator. The adapter (part no. 16611) c

HMP240User's Guide M210300en446.1.1.1 With serial commands• Make sure that the sensors of the transmitter and thereference instrument are close

HMP240 seriesM210300en User's Guide456.1.1.3 With LED commands• Make sure that the sensors of the transmitter and thereference instrument are cl

HMP240User's Guide M210300en46• Insert the sensor head into the measurement hole of theLiCl chamber.• Wait at least 10 minutes for the reading to

HMP240 seriesM210300en User's Guide47• Insert the sensor head into the measurement hole of theNaCl chamber.• Wait at least 20 minutes for the rea

HMP240 seriesM210300en User's guideiii7.5.2 With LED commands ...607.6 Measur

HMP240User's Guide M210300en486.1.3 Humidity calibration procedure after sensor changeHumidity calibration should be performed in stable conditi

HMP240 seriesM210300en User's Guide49• Insert the sensor head into the measurement hole of theLiCl chamber.• Wait at least 20 minutes for the rea

HMP240User's Guide M210300en50The basic capacitance of the new sensor may differ considerably from that ofthe previous one. Therefore the corresp

HMP240 seriesM210300en User's Guide516.2.1 One point offset calibration6.2.1.1 With serial commands• Leave the reference instrument and the tra

HMP240User's Guide M210300en526.2.2 Two point temperature calibration6.2.2.1 With serial commands• Leave the reference instrument and the trans

HMP240 seriesM210300en User's Guide536.2.2.2 With display / keypad commands• Leave the reference instrument and the transmitter for atleast 4 ho

HMP240User's Guide M210300en546.3 Calibration of analogue outputsThe analogue outputs have been calibrated at the factory and since they arevery

HMP240 seriesM210300en User's Guide55• Enter the measured upper end current/voltage on channel 2.6.3.3 With LED commandsIf both the analogue out

HMP240User's Guide M210300en567. MAINTENANCE7.1 Reference measurementsReference measurements are necessary for the verification of whether thet

HMP240 seriesM210300en User's Guide57>When errors have occurred, the transmitter outputs an error code (see Appen-dix 4 for all error messages

HMP240 seriesUser's guide M210300enivThis page intentionally left blank.

HMP240User's Guide M210300en58 TP2TP1TP3X77X88Figure 7.1 Location of solder lugs TP1, TP2 and TP3 and connectorX77Connect a Pt 100 si

HMP240 seriesM210300en User's Guide59Disconnect the Pt 100 simulator and reconnect the Pt 100 wires to solder lugsTP1, TP2 and TP3.The correct co

HMP240User's Guide M210300en60X88Pt 100Figure 7.4 Connecting the Pt 100 simulator to connector X88Switch the power on.7.5.1.1 With serial comman

HMP240 seriesM210300en User's Guide61the external load. The output current can, however, be measured at test pointsCH1+/CH1- and CH2+/CH2- withou

HMP240User's Guide M210300en628. TECHNICAL DATASensor RH & T composite sensor HUMICAP®KC(part no.18258HM)T sensor in the humidity

HMP240 seriesM210300en User's Guide638.2 Temperature (with additional T sensor head)Measurement range -40...+180 °CTypical accuracy at +20 °C (+

HMP240User's Guide M210300en648.3.2 Accuracy of other calculated variables Accuracy of mixing ratio (g/kg) when ambient pressure is 1013 mbarR

HMP240 seriesM210300en User's Guide658.4 OutputsTwo analogue outputs selectable 0...20 mA 4...20 mA0...1 V 0...5 V0...10 VTypical accuracy of an

HMP240User's Guide M210300en66Operating temperature (electronics) -40...+60 °Cwith display cover 0...+50 °CStorage temperature -40...+70 °C8.6 M

HMP240 seriesM210300en User's Guide67Figure 8.4 HMP247 sensor head informationWeight with2 m cable 5 m cable 10 m cableHMP240 (duct mounting, ma

HMP240 seriesM210300en User's Guide51. PRODUCT DESCRIPTIONThe HMP240 transmitter is a microprocessor based instrument for themeasurement of dewp

HMP240User's Guide M210300en689. SPARE PARTS AND ACCESSORIESOrder code DescriptionHMP243FA Mounting kit for HMP240, +180 °C cable16452 Sintered

HMP240M210300en Appendix 1: Serial commands69APPENDIX 1: SERIAL COMMANDS1. ANALOGUE OUTPUT COMMANDS ...

HMP240Appendix 1: Serial commands M210300en701. ANALOGUE OUTPUT COMMANDSAMODE Setting the analogue outputsDisconnect the security lock jumper!AMODE

HMP240M210300en Appendix 1: Serial commands71For example, relative humidity is selected to be output on channel 1 and tem-perature on channel 2; the t

HMP240Appendix 1: Serial commands M210300en72The output scales can also be given directly with the ASCL command.ASCL aaa.a bbb.b ccc.c ddd.d <cr&g

HMP240M210300en Appendix 1: Serial commands732. CALIBRATION COMMANDSCRH Relative humidity calibrationDisconnect the security lock jumper!CRH <cr&

HMP240Appendix 1: Serial commands M210300en74The command can also be divided into two commands, so the computer can beused for other purposes while wa

HMP240M210300en Appendix 1: Serial commands75CTA Temperature calibration of the optional T sensor headDisconnect the security lock jumper!CTA <cr&

HMP240Appendix 1: Serial commands M210300en76L Outputting linear correction coefficientsL <cr>With the help of command L the user can check how

HMP240M210300en Appendix 1: Serial commands773. OUTPUT VIA THE SERIAL BUSR Starting the measurement outputR <cr>Starts output of measurements t

HMP240User's Guide M210300en6OptionsAdditional T probe For the measurement of the ambient temperature andfor obtaining other quantities in additi

HMP240Appendix 1: Serial commands M210300en78DSEND Outputting readings of all connected transmitters onceDSEND <cr>All transmitters connected t

HMP240M210300en Appendix 1: Serial commands79ECHO Turning the serial interface echo ON/OFFECHO xxx <cr>xxx = ON or OFFWhen the echo is off, the

HMP240Appendix 1: Serial commands M210300en80FORM Setting the output formatFORM <cr>"xxx...xxx"? zzz...zzz <cr>xxx...xxx = old

HMP240M210300en Appendix 1: Serial commands81?\UUU.U\\t\TTT.T\\t\DDD.D\\t\AAA.A\\t\XXX.X\\t\WWW.W\\r\n <cr>The output is then:47.4<tab> 22

HMP240Appendix 1: Serial commands M210300en82Activating the date output>fdate onForm. date : ON>r1995-03-10 RH= 21.1 %RH T= 26.0 'C1995

HMP240M210300en Appendix 1: Serial commands83The processor does not allow the following combinations:• no parity, 7 data bits, 1 stop bit: if this com

HMP240Appendix 1: Serial commands M210300en84When asking the current address, no address number is given:>ADDR <cr>Address : 2 ? <cr>

HMP240M210300en Appendix 1: Serial commands85SMODE xxxx<cr>aa = address of the transmitterxxxx = STOP, RUN or POLLThe OPEN command sets the bus

HMP240Appendix 1: Serial commands M210300en864. OTHERSITEST Testing the analogue outputsITEST <cr>orITEST a b <cr>a = current/voltage of

HMP240M210300en Appendix 1: Serial commands87The time can be set in seconds within the range of 0 - 1024 (0 = no averagingtime).For example:>FILT &

HMP240 seriesM210300en User's Guide72. ADVANTAGES OF A WARMED SENSOR HEADIn some measurement applications, unwanted dew formation makes humidity

HMP240Appendix 1: Serial commands M210300en88XPRES Setting the pressure for mixing ratio and wet bulbtemperature calculations temporarilyXPRES pppp.pp

HMP240M210300en Appendix 1: Serial commands89TIME <cr>For example, to enter a new time:>TIME <cr>Current time is 01:35:54Enter new time

HMP240Appendix 1: Serial commands M210300en90?? <cr>Command ?? outputs the same information as command ? but it works alsowhen the transmitter h

HMP240M210300en Appendix 2: RS 485/422 serial port module91APPENDIX 2: INSTALLING AND USING THE RS 485/422 SERIALPORT MODULE1. INSTALLATION ...

HMP240Appendix 2: RS 485/422 serial port module M210300en921. INSTALLATIONSwitch the transmitter off.Resistors R2, R3 and R4 between connectors X4 an

HMP240M210300en Appendix 2: RS 485/422 serial port module932. OPERATIONThe HMP240 transmitter can either be given an address or operated w

HMP240Appendix 2: RS 485/422 serial port module M210300en94The RS 485/422 module has separate lines for transmitting and receiving, butthey can be con

HMP240M210300en Appendix 2: RS 485/422 serial port module953. NETWORK CONFIGURATION3.1 Single loop operationBi-directional data on

HMP240Appendix 2: RS 485/422 serial port module M210300en96• Set the address of the transmitter; you can choose any numberbetween 1 and 99. In this ex

HMP240M210300en Appendix 2: RS 485/422 serial port module973.2 Dual loop operationThe following procedure must be repeated with all transmitte