HMT310 User's Guide
Contents
1. HMT317 um it 37 5 1 48 L 795 3 13 99 5 3 92 0508 009 Figure 24 HMT317 Dimensions HMT318 R 2 ISO 7 1 or NPT i a CET e Wee 13 5 0 53 Lengths for standard optional probes freely user adjustable length 0508 078 Figure 25 HMT318 Dimensions 80 M210619EN D Appendix A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES APPENDIX A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES This appendix describes the available probe installation kits and provides some installation examples Duct Installation Kits for HM1T313 31 7 315 Duct installation kit includes a flange a sealing ring a supporting bar and probe attaching part for the probe and screws for attaching the flange to the duct wall Vaisala order codes 210697 for HMT313 and 210696 for HMT315 no supporting bar d 75 mm 50 mm AN RZ CO drilling 16 22 mm 5 4 B 4 2 x 16 DIN 7981 105 355 mm 0508 028 Figure 26 Duct Installation Kit The following numbers refer to Figure 26 above Duct wall Flange Sealing ring Supporting bar not included in the kit for HMT315 Probe attaching part to be fixed with the supporting bar Relative humidity probe NNBWN rz Hou We ou ue ul VAISALA 81 USER S GUIDE NOTE When the temperature dif2. Hypertrm double click Hyperterminal type the name of the type the name of the Connection connection in the Connection connection in the Description appropriate field and Description appropriate field and select an icon if select an icon if available click OK available click OK move the cursor to the move the cursor to the Phone Number field CONNECT USING Connect to field CONNECT USING and and select direct to select COM x x COM x x serial port serial port available available click OK click OK select parameters select parameters COM x properties according to the COM x properties according to the following figure click following figure click OK OK 36 M210619EN D Chapter 4 Operation Port Settings Bits per second so zs Data bits 7 x Parity Evn zl Stop bits fi DI Flow control S Restore Defaults 0507 046 Figure 15 HyperTerminal Settings in Windows 2000 Environment List of Commands VAISALA The text in BOLD letters in the brackets indicates the default setting Issue the commands by typing them on your computer keyboard lt cr gt stands for pressing Enter on your computer keyboard This section presents the command list the commands are described in detail later in this chapter Measurement output R Start continuous outputting S Stop continuous outputting INTV 0 255 S MIN H Set continuous output interval for RUN mo
3. When HMT318 is installed in a process with pressure differing from normal atmospheric pressure please enter the pressure value of the process in hPa or mbar into the transmitter memory via the serial line see section PRES Set Ambient Pressure for Calculations on page 48 VAISALA 31 USER S GUIDE Connections 32 When HMT310 leaves the factory its measurement ranges output scaling and quantities have already been set according to order completed by the customer The unit is calibrated at the factory and the device is ready for use The transmitter is delivered with a screw terminal connector or with a detachable 5 m cable with eight wires for serial port analog outputs and 24VDC power supply See the wiring instructions in Figure 13 below and in Figure 14 on page 33 Cable Wiring 5 6 F S SS a oN 4 ees ES 8 0507 044 Figure 13 8 Pole Connector The following numbers and codes refer to Figure 13 above Color Function 1 White WHT RS 232 TX 2 Brown BRN RS 232 GND 3 Green GRN CH2 4 Yellow YEL CHI 5 Grey GREY Supply CH1 CH2 6 Pink PINK Supply 7 Blue BLU RS 232 RX 8 Red RED Not connected M210619EN D Chapter 3 Installation Screw Terminal Connector 0507 045 Figure 14 Screw Terminal Connector The following numbers refer to Figure 14 above Color Function 1 White WHT RS 232 TX 2 Brown BRN RS 232 GND 3 Green G
4. 165 MHz is only 3 V m generic environment with the specified accuracy VAISALA 75 USER S GUIDE Options and Accessories 76 Table 15 Options and Accessories Description Order Code Probe accessories PPS Plastic Grid with Stainless Steel Netting DRW010281SP PPS Plastic Grid Filter DRW010276SP Sintered Filter AISI 316L HM47280SP Stainless Steel Filter HM47453SP Stainless Steel Filter with Membrane 214848SP Sensors Vaisala HUMICAP 180R general purpose HUMICAP180R PT100 sensor 10429SP Probe mounting accessories Fitting Body M22x1 5 17223 Fitting Body NPT1 2 17225 Mounting Flange For HMT315 210696 Swagelok for 12mm Probe 3 8 ISO Thread SWG121SO038 Swagelok for 12mm Probe 1 2 NPT Thread SWG12NPT12 Cable Gland M20x1 5 with Split Seal HMP247CG Duct Installation Kit for HMT313 and HMT317 210697 Ball Valve ISO1 2 with Welding Joint BALLVALVE 1 Thread Adapter ISO1 2 to NPT1 2 210662 Other Calibration Adapter for HMK15 211302SP Connection cable to MI70 indicator HM70 DRW216050 M210619EN D Chapter 8 Technical Data Dimensions in mm inches Transmitter Enclosure and Mounting Plates 43 1 69 72 5 2 85 12 0 47 5 0 20 60 5 2 38
5. Throughout the manual important safety considerations are highlighted as follows WARNING Warning alerts you to a serious hazard If you do not read and follow 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 10 M210619EN D Chapter 1 General Information Product Related Safety Precautions The Humidity and Temperature Transmitter HMT310 delivered to you has been tested for safety and approved as shipped from the factory Note the following precautions WARNING Ground the product and verify outdoor installation grounding periodically to minimize shock hazard CAUTION Do not modify the unit Improper modification can damage the product or lead to malfunction CAUTION Do not touch the sensor plate CAUTION In pressurized processes it is essential to tighten the supporting nuts and screws very carefully to prevent loose
6. sccssecceseeeeeseeseseeeenseeeeseeeesseesenseeeees 39 R Start Continuous Outputting 0 eeeeeeeeeeeeeeeeeteeteeeeeeeee 39 S Stop Continuous Outfpuftimg eeren eneen 39 INTV Set Continuous Output Interval for RUN Mode 40 SEND Output Reading Once 40 SMODE Set Serial Interface Mode 40 SERI Serial Line Settings ccccseeeeeeeeeeeeeeeteeeeneeeeeeeees 41 ADDR Get Transmitter Address for Use in POLL Mode 41 OPEN Temporarily Open Transmitter from POLL Mode to Receive Serial Commande nens 42 CLOSE Set Transmitter in POL Mode 42 Output Formatting ccccseeesseeeeseeeseseeeseeeeneeeeseeeseseeensnenenes 43 FORM Serial Output Format 0 cccsccceeeeeeeeeeeeeseeeeeeeees 43 TIME DATE Setting Time and Date osnnnnnennnaaennnaeneeeea 44 FTIME FDATE Add Time and Date to SEND and R EE e ee 45 UNIT Select Metric or Nonmetric Output Units 45 FST Output State of Chemical Purge or Sensor Heating with SEND and R Commande 46 Other CommandS sccseeeeeeeeeeeeeesneeeneeeeeeeeeeseaesaseeeeneeeeeeas 47 Check Transmitter Settings 0 ccceeeseeeeeeeeeeeeeeeeeeees 47 ECHO Serial BUS Echo 48 FIND All Devices in POLL Mode Send Their Addresses 48 HELP List Commande a i A a N 48 PRES Set Ambient Pressure for Calculaions 48 FILT Set Result Eiterng 50 RESET Reset Transmitter 50 ERRS Display Error Messages ccececeeeeeeeeeeteeeeneeeees 50 Setting Scaling and Te
7. 1 5 0 015 x reading RH Factory calibration uncertainty 0 6 RH 0 40 RH 20 C 1 0 RH 40 97 RH Defined as 2 standard deviation limits Small variations possible see also calibration certificate Response time 90 for 17 s with grid filter HUMICAP 180R and 50 s with grid steel netting filter HUMICAP 180RC at 20 C in 60 s with sintered filter 0 1 m s air flow VAISALA 73 USER S GUIDE 74 Table 12 Temperature Specifications and Operating Pressure Ranges Property Description Value HMT311 40 60 C 40 140 F HMT313 80 C 40 80 C 40 176 F HMT313 120 C 40 120 C 40 248 F HMT314 70 180 C 94 356 F o 10 MPa 0 100 bar HMT315 vapor tight 70 180 C 94 356 F HMT317 vapor tight 70 180 C 94 356 F HMT318 70 180 C 94 356 F 0 4 MPa 0 40 bar Accuracy at 20 C 68 F 0 2 C Accuracy over temperature range See Figure 18 below Typical temperature dependence of electronics 0 05 C C 0 005 F F Temperature sensor 80 60 40 20 0 20 Pt 100 RTD 1 3 Class B IEC 751 40 60 80 100 120 140 160 180 0507 021 Figure 18 Accuracy over Temperature Range M210619EN D Chapter 8 Technical Data Table 13 Electronics Specifications Property Two analo
8. Let the probe stabilize for at least 30 minutes You can follow the stabilization by pressing any key typing C and pressing Enter When stabilized type the high end reference value after the question mark and press Enter gt crh RH S 11 25 Refl g RH 11 24 Refl c RH 11 24 Refl 11 3 Press any key when ready RH S 75 45 Ref2 c RH S 75 57 Ref2 e RH 75 55 Ref2 c RH 73309 REE2 AF 75 35 OK gt OK indicates that the calibration has succeeded Take the probe out of the reference conditions and replace the filter When using the stainless steel filter take care to tighten the filter properly recommended force is 130 Necm If needed record the calibration information text and date to the memory of the transmitter see CTEXT Set Calibration Information Text on page 68 and CDATE Set Calibration Date on page 68 Reset the transmitter by issuing the RESET command The transmitter returns to normal mode 71 USER S GUIDE Temperature Calibration and Adjustment in One Point 1 72 Remove the transmitter unit from the mounting plate see Mounting the Transmitter Removing the Transmitter Unit on page 21 and press the adjustment button once see Figure 17 on page 70 Remove the probe filter see instructions on page 63 and insert the probe into the reference temperature Let the sensor stabilize Issue command CT and press Enter Type C and press Enter a few times to check
9. Optional 400 mm 340 mm 29 USER S GUIDE 30 fitting body hex 24mm tapered thread F sealing with 1 LOCTITE No 542 activ No 7649 t 55 150 C 2 MEGA PIPE EXTRA No 7188 t 55 170 C 3 PTFE tape t 60 210 C NOTE the tape does not lock the parts together Therefore use two fork spanners hex 24 and 27 mm for tightening and opening the clasp nut of the probe 0507 025 Figure 11 Sealing of Fitting Body into Process Tightening the Clasp Nut 1 Adjust the probe to a suitable depth according to the type of installation Tighten the clasp nut first manually 3 Mark the fitting screw and the clasp nut Tighten the nut a further 50 60 ca 1 6 turn with a wrench If you have suitable torque spanner tighten the nut to max 45 5 Nm 33 4 ft lbs 0505 276 Figure 12 Tightening the Clasp Nut M210619EN D Chapter 3 Installation The following numbers refer to Figure 12 on page 30 1 Probe 2 Clasp nut 3 Pen 4 Fitting screw NOTE Take care not to overtighten the clasp nut to avoid difficulties when opening it CAUTION CAUTION Take care not to damage the probe body A damaged body makes the probe less tight and may prevent it from going through the clasp nut In pressurized processes it is essential to tighten the supporting nuts and screws very carefully to prevent loosening of the probe by the action of pressure NOTE
10. 10 HMT318 Probe Dimensions iN mm 29 Figure 11 Sealing of Fitting Body into Process 30 Figure 12 Tightening the ClaspNut 30 Figure 13 8 Pole COMNMECHON 1 c ce eeeeeeseeeeee eect eeeeaeeeeeeeseeeesaeeeeaeeeeeeeens 32 Figure 14 Screw Terminal Connector ccecccceeeeeeeeeeteeeeeeeeeeeneeeeeeeees 33 Figure 15 HyperTerminal Settings in Windows 2000 Environment 37 Figure 16 Decrease of Sensor Gain Due to Interfering Chemical and Effect of Chemical Purge Process 55 Figure 17 Location of Adjustment Button 70 Figure 18 Accuracy over Temperature Hange 74 Figure 19 Transmitter Enclosure and Mounting Plate Dimensions 77 Figure 20 Probe Dimensions A 78 Figure 21 HMT313 Dimensions cece eeeeeeeeenne ee ee eeeeeeeeeaeeeeeeaeeeeee 78 Figure 22 HMT1314 Dimensions eee ee eeeeeeeeeeeeeeeeeeeeeeeetaeeeeeenaeeeeee 79 Figure 23 HMT315 Dimensions eee ee eeeeeeeeenee eset eee eeeeeeaeeeeeenaeeeeee 79 Figure 24 HMT317 Dimensions cece eeeeeeeeeeee ee ee eeeeeeeeeaeeeeeeaeeeeee 80 Figure 25 HMT318 Dimensions cece eeeeeeeeeeee eset teens eeeeneeeeeenaeeeeee 80 Figure 26 Duct Installation Kn 81 Figure 27 Swagelok Installation Kit for RH Probe 82 Figure 28 Cable Installation with Cable Gland AGO 83 Figure 29 Probe Installation with Cable Gland not available from VEITH EE 84 Figure 30 Installing the HMT318 Probe Through a Ball Valve Assembly 85 6 M210619EN D List of Tables VAISALA Table 1 Table 2 Table 3 Tab
11. 6 0 24 N D 5 5 O o eel et ky NIO O N 7 to 2 Cl RI O CO e le Ee D peut TH ES f Ge 19 0 75 48 5 1 91 0507 049 Figure 19 Transmitter Enclosure and Mounting Plate Dimensions The following numbers refer to Figure 19 above Mounting plate alternatives 1 Wall Plate Cover DRW212957 bigger plate 2 Wall Plate Cover No Flange DRW214786 smaller plate VAISALA 77 USER S GUIDE Probes HMT311 120 4 72 0507 050 Figure 20 Probe Dimensions HMT313 12 0 47 M9x1 37 5 1 48 78 5 3 09 98 5 3 88 0508 008 Figure 21 HMT313 Dimensions 78 M210619EN D Chapter 8 Technical Data HMT314 ie Lt LU M22x15 or NPT 1 2 170 6 69 H 12 0 47 105 4 13 41 1 61 0507 052 Figure 22 HMT314 Dimensions HMT315 e D a S S x CH SE Da s i A H O D Es p HH 41 1 61 p 27 1 06 2 0 08 192 7 56 242 9 53 0507 053 Figure 23 HMT315 Dimensions Flange for HMT315 available as an option VAISALA 79 USER S GUIDE
12. and Accessories cccesccssseeeseceeeeeeesteeeeseeeeneeenees 76 Dimensions in MM inches cceceeeeeeeee eee ee eeeeeneeeeeeeeeeees 77 Transmitter Enclosure and Mounting Pilates 77 PHrODGS ie face Fabs hee Si adh AE AEA A eeh 78 La MESS RN 78 FIM TSA RE 78 el RECH ET 79 el EE 79 FM RECH E cuentueid aana aanas eaaa A aada aitanta 80 AMTS EWEN 80 APPENDIX A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLEG 81 Duct Installation Kits for HMT313 317 315 sssseeese 81 Pressure Tight Swagelok Installation Kits for HMT317 82 RH Probe Installation cccccccceescceeceeeeeeeeeeeeenaeeeeeeeeeeee 82 Examples of Vapor Tight Installations with Cable Gland 83 RH Probe Installations for HMT 21317 83 Ball Valve Installation kit for HMT318 csccssseeseeeeeees 84 VAISALA USER S GUIDE List of Figures Figure 1 HMT310 Components sssssseeeseeeseeseesesssnneennnennrnnneennsnnnsen nens 18 Figure 2 FIMT 310 FODOS ranea e hea deh whi EEEN 19 Figure 3 Mounting with Mounting Pilates 22 Figure 4 Mounting Plate Dumensions 23 Figure 5 Measurement Error at 100 RH when Difference Between Ambient and Sensor Temperature iS 1 CA 24 Figure 6 Horizontal Mounting Of Probe 24 Figure 7 Vertical Mounting of Probe ccccccceeeeeseeeeeeeeeeeeeeeeeeeeneeees 25 Figure 8 HMT314 Installation ee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeenaees 26 Figure 9 Marking the Mut 27 Figure
13. and Adjustment Commands on page 67 CRH CT LI FCRH CTEXT CDATE ACAL Relative humidity calibration Temperature calibration Revert factory calibration Relative humidity calibration after sensor change Set calibration information text Set calibration date Analog output calibration M210619EN D Chapter 4 Operation Chemical purge PUR ON OFF Enable or disable automatic chemical purge PURGE Activate chemical purge PURR ON OFF Enable or disable automatic chemical purge in power up Sensor heating XHEAT ON OFF Enable or disable sensor heating Measurement Output VAISALA R Start Continuous Outputting Syntax R lt cr gt Starts output of measurements to the peripheral devices RUN mode the only command that can be used is S stop The output mode can be changed with command FORM Example Kee RH 28 0 RH T 23 3 C RH 28 0 RH T 23 3 C RH 28 0 RH T 23 3 C RH 28 0 RH T 23 3 C RH 28 0 RH T 23 3 C RH 28 0 RH T 23 3 C S Stop Continuous Outputting Syntax S lt cr gt Stops the continuous output Also the Ese key on your computer keyboard can be used to stop outputting 39 USER S GUIDE 40 INTV Set Continuous Output Interval for RUN Mode Syntax INTV xxx yyy lt cr gt Where Xxx Output interval 0 255 yyy Unit s min orh Example gt intv l lt cr gt Output interval 1 S Sint 2 min lt er gt Output interval 1 MIN gt intv 1 h
14. channel the probe must be inserted from the side of the duct If this is not possible and the probe must be inserted from the top the point of entry must be carefully insulated HMT313 for General Use The HMT313 is a small size d 12mm general purpose probe suitable for ducts and channels with the installation kit available from Vaisala 25 USER S GUIDE 26 The HMT313 provides for two measuring range options The first probe version 1s equipped with a flexible cable and can be used when measuring in environments up to 80 C The second version is suitable for measuring in environments up to 120 C See Appendix A on page 81 for the following probe installation kits for HMT313 and installation examples Duct mounting kit Cable gland HMT314 for Pressurized Spaces HMT314 probe is for humidity measurements in pressurized rooms and industrial processes The probe is provided with a nut a fitting screw and a sealing washer Keep the fitting screw and nut in place on the body of the probe during handling to prevent damage to the highly polished surface of the probe Follow the instructions below to achieve a leak tight assembly Remove the fitting screw from the nut and the probe 2 Attach the fitting screw to the chamber wall with a sealing washer Tighten the fitting screw into the threaded sleeve with a torque spanner The tightening torque is 150 10 Nm 110 7 ft lbs 3 Insert the body of the probe
15. hereby expressly M210619EN D Chapter 1 General Information cancelled and waived Vaisala s liability shall under no cir cumstances 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 VAISALA 15 USER S GUIDE This page intentionally left blank 16 M210619EN D Chapter 2 Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the features advantages and the product nomenclature Introduction to HMT310 The Vaisala HUMICAP Humidity and Temperature Transmitter HMT310 is a small size humidity and temperature transmitter that powers up with 12 35 VDC Output alternatives are analog outputs 0 4 20 mA and an RS 232 serial line The following optional functions are available Several probes for various applications Calculated humidity quantities Different mounting kits sensor protection options and probe cable lengths Warmed probe and sensor heating for high humidity conditions HMT317 Chemical purge for applications where there is a risk of interfering chemicals in the measuring environment VAISALA 17 USER S GUIDE Components 0507 032 Figure 1 HMT310 Components The following numbers refer to Figure 1 above l 3 Transmitter unit Mounting plate smaller mounting plate
16. iespaida oada se tens n aaia eee nated etek aioe 63 Periodic Maintenance ccsssecccessseeeeesesseeeeeseseenenssscenes 63 Calibration Interval cc cccccsccccessseeceeeesneeeeesseeeessseeeeseaas 63 Replacing CONSUMADIES ccccccesccesseeeeeeeeeeseeeseeeenseeeeeeees 63 Filter Change es eka ici tn ogee ee thes ae 63 sensor Change i2ai ei repari tiated tees 63 Parts List for Consumables ssssssssesnneneennnnenn nnne nn nnne nenene 64 Technical Support ccsseeceeseeeseeeseneeeeneeeeeeeesseseeeeneeeeeeeees 64 Return Instructions ccceseeeee cece eeeeeneeeeeeeeeeeeeneeeeceeeeeeenenes 65 Vaisala Service Centers cccccsseeeeeseeeeeeeseeeeeeeseeneeenenes 66 CHAPTER 7 CALIBRATION AND ADJUSTMENT ccceseeeceeeseeeeeeeeeeeeeeeeseeeseenenes 67 Calibration and Adjustment Command6 0 see 67 LI Revert Factory Calibration 0 csceeeeeeeeeeeesteeteeeees 67 FCRH Relative Humidity Calibration after Sensor Change 68 CTEXT Set Calibration Information Text 68 CDATE Set Calibration Date 68 ACAL Analog Output Calibration ccccccieeeteeeeeneeees 69 Relative Humidity Calibration and Adjustment in Two POMS E 69 Low End Adiustment eeraa irea e t 70 High End Adjustment AA 71 Temperature Calibration and Adjustment in One Point 72 CHAPTER 8 TECHNICAL DATA ee Eed EE Eed ENEE 73 Specifi cat ONS 222i s5icssic degen eieiei eege 73 Options
17. if the reading is stabilized When the reading is stabilized type the reference temperature after the question mark and press Enter three times gt ct T 16 06 Refl c T 16 06 Refl c T 16 06 Refl c T 16 06 Berl c T 16 06 Refl c T S 16 06 Refl 16 0 Press any key when ready T 16 06 Ref2 OK gt OK indicates that the calibration has succeeded Take the probe out of the reference conditions and replace the filter When using the stainless steel filter take care to tighten the filter properly recommended force 130 Nem If needed record the calibration information text and date to the memory of the transmitter see CTEXT Set Calibration Information Text on page 68 and CDATE Set Calibration Date on page 68 Reset the transmitter by issuing the RESET command The transmitter returns to normal mode M210619EN D Chapter 8 Technical Data CHAPTER 8 TECHNICAL DATA This chapter provides the technical data of the product Specifications Table 11 Relative Humidity Specifications Property Description Value Measuring range 0 100 RH Accuracy including nonlinearity hysteresis and repeatability with Vaisala HUMICAP 180R for typical applications Vaisala HUMICAP 180RC for applications with chemical purge and or warmed probe at 15 25 C 1 RH 0 90 RH 1 7 RH 90 100 RH at 20 40 C 1 0 0 008 x reading RH at 40 180 C
18. 0 99 The OPEN command sets the bus temporarily in STOP mode so that the SMODE command can be issued Example gt open 4 lt cr gt Device 4 line opened for operator commands gt CLOSE Set Transmitter in POLL Mode Syntax CLOSE lt cr gt In STOP mode command OPEN has no effect CLOSE sets the transmitter temporarily in POLL mode In POLL mode command OPEN sets the transmitter temporarily in STOP mode command CLOSE returns the instrument to POLL mode M210619EN D Chapter 4 Operation Example Relative humidity calibration is performed at transmitter 2 which is in POLL mode gt open 2 lt cr gt Opens the line to transmitter 2 gt crh lt cr gt Calibration started gt close lt cr gt Line closed Output Formatting FORM Serial Output Format Syntax FORM x lt cr gt Where x Formatter string Command format can be used to change the format of the output commands SEND and R Format string consists of quantities and modifiers use the quantity abbreviations and modifiers presented in Table 5 on page 44 and in Table 6 on page 44 when selecting the output quantities VAISALA 43 USER S GUIDE Table 5 Quantity Abbreviations for FORM Command Abbreviation Quantity RH Relative humidity T Temperature TDF Dewpoint Frostpoint TD Dewpoint A Absolute humidity xX Mixing ratio TW Wet bulb temperature PPM Humid air volume dry air volume PW Wa
19. OLL Mode Send Their Addresses Syntax FIND lt cr gt HELP List Commands Syntax HELP lt cr gt PRES Set Ambient Pressure for Calculations Syntax PRES aaaa a lt cr gt Syntax XPRES aaaa a lt cr gt Where aaaa a Absolute pressure hPa Command XPRES should be used if the value is changed frequently Its value is not retained at reset and when set to 0 value set with PRES is used M210619EN D Chapter 4 Operation Example If gauge pressure is 1 4 bar set pressure value 2 4 bar 2400 hPa gt pres 2400 lt cr gt Pressure 2400 gt Table 8 Pressure Conversion Chart TO hPa mmHg mbar Torr An nu James 33 86388 1013 25 1000 68 94757 mbar 0 02952999 0 03937008 ao ez 29 52999 2 036021 FROM 0 001 0 001333224 0 03386388 1 01325 1 006894757 jatm 0 00098692 0 00131597 0 033422 1 o seeae 0 068046 psi 0 01450377 0 01933678 0 4911541 14 6962 14 50377 Example 29 9213 inHg 29 9213 x 33 86388 1013 25 hPa mbar NOTE Conversions from mmHg and inHg are defined at 0 C and for mmH20 and inH20 at 4 C NOTE Pressure compensation is intended to be used in normal air only When measuring in other gases please contact Vaisala for further information VAISALA 49 USER S GUIDE 50 FILT Set Result Filtering Syntax FILT xx lt cr gt Enable or disable the filtering or select the extended filter to reduce noise of the measurement Where
20. RN CH2 4 Yellow YEL CHI 5 Grey GREY Supply CH1 CH2 6 Pink PINK Supply 7 Blue BLU RS 232 RX 8 Red RED Not connected VAISALA 33 USER S GUIDE 34 This page intentionally left blank M210619EN D Chapter 4 Operation CHAPTER 4 OPERATION This chapter contains information that is needed to operate Humidity Transmitter HMT310 Power ON OFF Switch on the 24 VDC power supply and the transmitter wakes up Entering Serial Communication Parameters The transmitter communicates via an RS 232 serial interface The transmitter can be polled or set on RUN mode with specific commands The data format will be factory settings 1 start bit 7 data bits 1 stop bit Even parity 4800 bits per second programmable to 19200 Full duplex Serial asynchronous Configured as Data Terminal Equipment DTE Enter the communication parameters when using this terminal session for the first time save them for future use See instructions in Table 4 on page 36 VAISALA 35 USER S GUIDE Table 4 Entering Serial Parameters in Windows 2000 and Windows NT WINDOWS 2000 WINDOWS NT MENU Star o o o k l move the cursor to movethecursorto Programs Pp Programs l move the cursor to move beem EE Accessories Accessories move the cursor to move the cursorto Communications J movethecursorto y O HyperTerminal HyperTerminal
21. VAISALA USER S GUIDE Vaisala HUMICAP Humidity and Temperature Transmitter HMT310 M210619EN 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 CE Table of Contents CHAPTER 1 GENERAL INFORMATION 000 cccccesceeeeeeseneesesceeeeenesceesesesceeseseseensessenenes 9 About This Manual ccccccsceseeeeeeeceeeeeeeeseneeeeeeeeeeeeneeneeneees 9 Contents of This Manual 9 Version Information cccccesessececececeecseseeaeceseeseessesseaeeeeess 10 General Safety Considerations cccccccsseeceesteeeeeeees 10 RT ele Ee 10 Product Related Safety Precautions cssseceessseeees 11 ESD ProteCuion se ddguedeedgee Ee de caceccsadscncanis ee 11 FRO CY CUM G dereen 12 Regulatory Compliance c
22. a h 43 5 kJ kg gt For more information about chemical purge see pages 54 through 57 For more information about sensor heating see pages 57 through 59 Letters and values indicating the state of the probe N XXX normal operation xxx probe heat power W X XXX sensor heating XXX sensor temperature CC H xxx chemical purge XXX sensor temperature CC S xxx sensor cooling after purge xxx sensor temperature CC Other Commands VAISALA Check Transmitter Settings Syntax lt cr gt Syntax lt cr gt Use command to check the current transmitter configuration Command is similar but can also be used if the transmitter is in POLL state Example factory default settings gt lt cr gt HMT310 1 07 PRB serial nr A0000000 Calibration 2004 05 07 Cal info Vaisala HEL Output units metric Pressure 1013 25 hPa RS232 settings Address S 0 Output interval 0 S Baud P D S 4800 E 7 1 Serial mode STOP Analog outputs Chl output mode 0 20mA Ch2 output mode 0 20mA Chl error out 0 000mA Ch2 error out 0 000mA Chil RH lo S 0 00 SRH Chi RH hi 100 00 SRH 47 USER S GUIDE 48 Ch2 T lo G 40 00 C Ch2 T hi S 60 00 C gt ECHO Serial Bus Echo Syntax ECHO x lt cr gt Where x ON OFF default ON The command enables or disables echo of characters received over the serial line FIND All Devices in P
23. also available Connector for signal output and power supply Available with female connector with 5 m cable or screw terminal connector Probe M210619EN D Chapter 2 Product Overview Probe Options a 0507 033 Figure 2 HMT310 Probes The following numbers refer to Figure 2 above 1 HMT311 for wall mounting 2 HMT313 for general use 3 HMT314 for pressurized spaces up to 100 bar 4 HMT315 for high temperatures up to 180 C 242 mm long probe vapor tight 5 HMT317 for demanding processes warmed and vapor tight probe HMT318 for pressurized pipelines 40 bar ball valve CH II Flange for HMT315 available as an option Probe cable lengths 2 5 and 10 m VAISALA 19 USER S GUIDE Output Quantities Table 2 HMT310 Output Quantities Quantity Metric Unit Nonmetric Unit RH Relative humidity RH RH T Temperature C oF TDF Dewpoint Frostpoint C F TD Dewpoint C F A Absolute humidity g m gr ft X Mixing ratio g kg gr lb TW Wet bulb C F temperature PPM Humid air volume ppm ppm dry air volume PW Water vapor hPa bin pressure PWS Saturation water hPa Ib in vapor pressure H Enthalpy kJ kg Btu lb NOTE Only quantities selected when ordering the device can be selected for an output quantity 20 M210619EN D Chapter 3 Installation CHAPTER 3 INSTALLATION This chapter provides you wi
24. bulb temperature C oF PPM Humid air volume dry air Pom ppm volume PW Water vapor pressure hPa Ib in PWS Saturation water vapor hPa un pressure H Enthalpy kJ kg Btu lb NOTE Only the quantities selected when ordering the device can be selected for an output quantity 52 Examples gt asel td tdf lt cr gt Chl Td lo 40 Chl Td hi 100 Ch2 Tdf lo 40 Ch2 Tdf hi S 60 gt asel x td lt cr gt Chil x lo 0 Chil x hi 160 Ch2 Td lo i 40 Ch2 Td hi 60 gt ASCL Scale Analog Outputs Syntax ASCL lt cr gt Example gt ascl lt cr gt Chi Td lo 40 Chl Td hi 100 Ch2 x lo O Ch2 x hi 4 500 00 00 00 00 00 00 00 00 00 00 G CG We SE g kg g kg IC IC IC IC g kg g kg VV al zl zl zl zl zl zl zl al zl M210619EN D Chapter 4 VAISALA Operation ITEST Test Analog Outputs Syntax ITEST aa aaa bb bbb lt cr gt The operation of the analog outputs are tested by forcing the outputs to given values The values in the analog outputs can then be measured with a current voltage meter Where aa aaa Current value to be set for channel 1 bb bbb Current value to be set for channel 2 Example gt itest 8 12 lt cr gt 8 000mA3F8 12 000mA 700 gt The set values remain valid until you issue the ITEST command without readings or reset the transmitter AQTEST Test Analog Outputs for Desired Readin
25. ccccccesceesseeeneseeeseeeseseeeeneeeeeesees 12 Bulle Te EE 13 Jm ODEM edecctseeecies tencenetes bechvect dunes Ed ed Eder 13 LTE OC 13 Warranty EENEG ENEE 13 CHAPTER 2 PRODUCT OVERVIEW geed 17 Introduction to HMT310 cccceeeeseeseeeeeeeeeenseneeneeeeeeeees 17 COMPONOCNNS ces 18 Probe Options ii cs ssczsccserscccecscecsecce EELER EES Eden 19 Output Quantities eee sete eeeeeeeeee eee eneeeeneeeeneeeeeeeeeseaeenseenenes 20 CHAPTER 3 INSTALLATION amp eege eed eh ee ee ee en 21 Selecting Location a oeeie anii eieiei iienaa 21 MOUNUING BEE 21 Mounting the Transmitter Removing the Transmitter Unit 21 Mounting the Probes A 23 Beware of Temperature Differences sssssnnsnssnneenee 23 General Instructions for Probes with Cable 24 HMT313 for General Usee ennnen nnn nnnenn nenene 25 HMT314 for Pressurized Spaces seeseeeeeseeeeereenen 26 HMT315 for High Temperatures 0 ccscceccssteeeeeeees 28 HMT317 for Demanding Procesees 28 HMT318 for Pressurized Pipelines s 29 Tightening the Clasp Nut cccecccessssseeeesseteeeseeaees 30 Ve EE 32 Cable Wining Age ge EE ege 32 Screw Terminal Connechor nnne nn nenen 33 CHAPTER 4 OPERATION E Seege 35 Power ON OFF ease 35 VAISALA USER S GUIDE Entering Serial Communication Parameters 0 35 List Of COMIMAMNAS ccetcceseeeceeeeeeeeeeseseeeeneeeeeeeeeseneeeeneeeeeeees 37 Measurement OUtput
26. ce it on site 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 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 OF FITNESS FOR A PARTICULAR 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
27. ction wait about 8 min after powerup before taking measurements The powerup chemical purge locks the output values for the first operation minutes Chemical Purge Activated Manually Chemical purge needs to be performed always before calibration see Chapter 7 Calibration and Adjustment on page 67 or whenever there is reason to believe that the sensor has been exposed to an interfering chemical Make sure that the temperature of the sensor has come down to normal before starting calibration Before starting chemical purge please note the following The sensor is protected with a PPS grid with stainless steel netting a stainless steel sintered filter or with a membrane SST filter The sensor temperature needs to be below 100 C At higher temperatures the chemicals evaporate spontaneously from the sensor and the chemical purge is not necessary Starting Manual Chemical Purge Type PURGE via the serial line to activate chemical purge Syntax PURGE lt cr gt gt purge Purge started press any key to abort 2 The prompt gt appears when the heating period is over However the transmitter outputs are locked to values measured before chemical purge until the settling time is over Sensor Heating General This function is optionally available only in transmitters with HUMICAP 180RC sensor It should be used only with the warmed probe VAISALA 57 USER S GUIDE The sensor heating is recommended for t
28. de SEND 0 99 Output reading once SMODE STOP RUN POLL Set serial interface mode SERI baud p d s Serial line settings default 4800 E 7 1 baud 300 19200 ADDR 0 99 Set transmitter address for Use in POLL mode OPEN 0 99 Temporarily open transmitter from POLL mode to receive commands CLOSE Set transmitter in POLL mode 37 USER S GUIDE 38 Output formatting FORM TIME DATE FTIME ON OFF FDATE ON OFF UNIT FST ON OFF Other commands 2 ECHO ON OFF FIND HELP PRES XPRES FILT RESET ERRS Serial output format Set time Set date Add time to SEND and R outputs Add date to SEND and R outputs Select metric or nonmetric output units Output state of optional probe heating and chemical purge with SEND and R commands Check transmitter settings Check transmitter settings in POLL mode Serial bus echo All devices in POLL mode send their addresses List commands Set ambient pressure for calculations non volatile Set ambient pressure for calculations Set result filtering Reset transmitter Display error messages Setting scaling and testing analog outputs AMODE ASEL ASCL ITEST AQTEST AERR Set analog outputs 0 4 20 mA Select parameter for analog outputs Scale analog outputs Test analog outputs Test analog outputs for desired readings Set error outputs Calibration and adjustment these are presented in Chapter 7 section Calibration
29. e calibration procedure Low End Adjustment 1 Remove the transmitter unit from the mounting plate see Mounting the Transmitter Removing the Transmitter Unit on page 21 and press the adjustment button once see Figure 17 above 2 Remove the filter from the probe see instructions on page 63 and insert the probe into the measurement hole of the dry end reference chamber for example LiCl 11 RH in the humidity calibrator HMK15 use adapter fitting 13 5 mm for HMT314 HMT315 HMT317 and HMT318 3 Wait at least 30 minutes for the sensor to stabilize 4 Issue command CRH and press Enter 5 Type C and press Enter a few times to check if the reading is stabilized 70 M210619EN D Chapter 7 Calibration and Adjustment When the reading is stabilized type the reference humidity after the question mark and press Enter gt crh RH 11 25 Refl e RH 11 25 Refi 2 g RH 11 25 Refl c RH 11 24 Refl c RH 11 24 Refl 11 3 Press any key when ready Now the device is waiting for the high end reference High End Adjustment T7 10 11 12 VAISALA After the low end adjustment insert the probe into a measurement hole of the high end reference chamber for example NaCl 75 RH chamber in the humidity calibrator HMK15 please use the adapter fitting 13 5 mm for HMT314 HMT315 HMT317 and HMT318 Note that the difference between the two humidity references must be at least 50 RH
30. es with EMC standard EN61326 1 Industrial environment NOTE The RF field susceptibility level according to standard EN 61000 4 3 with frequency band 110 165 MHz horizontal polarization is only 3 V m generic environment with the specified accuracy 12 M210619EN D Chapter 1 General Information Emissions Complies with Standard EN55022 CISPR16 22 Class B Immunity Test Complies with Standard Electrostatic discharge EN IEC 61000 4 2 criteria B ESD Radiated immunity EN IEC 61000 4 3 criteria A EFT burst Electric fast EN IEC 61000 4 4 criteria B transients Surge EN IEC 61000 4 5 criteria B Conducted immunity EN IEC 61000 4 6 criteria A Trademarks Warranty VAISALA Vaisala Trademark is a registered trademark of Vaisala Oyj VAISALA HUMICAP is a registered trademark of Vaisala Microsoft Windows Windows NT and Windows 2000 are registered trademarks of Microsoft Corporation in the United States and or other countries 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 delivery 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 ow
31. f the following chapters VAISALA Chapter 1 General Information provides general notes for the manual and the product Chapter 2 Product Overview introduces the features advantages and the product nomenclature Chapter 3 Installation provides you with information that is intended to help you install this product Chapter 4 Operation contains information that is needed to operate Humidity Transmitter HMT310 Chapter 5 Measuring at Overpressure contains important information concerning the use of HMT310 in overpressure conditions Chapter 6 Maintenance provides information that is needed in basic maintenance of HMT310 and lists contact information for technical support and Vaisala Service Centers Chapter 7 Calibration and Adjustment describes the relative humidity and temperature adjustment procedures Chapter 8 Technical Data provides the technical data of the product Appendix A describes the available probe installation kits and provides some installation examples USER S GUIDE Version Information Table 1 Manual Revisions Manual Code Description M210619EN A June 2004 First release M210619EN B September 2005 M210619EN C September 2007 Added HUMICAP 180R and HUMICAP 180RC as sensor options M210619EN D November 2009 Removed HUMICAP 180 HUMICAP 180C and HUMICAP 180L2 from sensor options Updated Technical Data of the product General Safety Considerations
32. ference between the duct and the air outside the duct is significant the supporting bar must be installed as deep in the duct as possible This helps to prevent errors caused by heat conduction in the bar and cable Pressure Tight Swagelok Installation Kits for HMT317 82 RH Probe Installation 80 mm SSAA Ss SS d G ff CHE rif iw RRR LIZZ N P max 10 bar NA EE 0508 032 Figure 27 Swagelok Installation Kit for RH Probe The following numbers refer to Figure 27 above 1 Relative humidity probe 2 Duct connector 3 JISO3 8 or NPT1 2 thread 4 Swagelok connector 5 Ferrules M210619EN D Appendix A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES Examples of Vapor Tight Installations with Cable Gland RH Probe Installations for HMT313 317 S RE g bes 0508 026 Figure 28 Cable Installation with Cable Gland AGRO The following numbers refer to Figure 28 above Nut to be tightened to the body Seal 1 2 3 Body and O ring Vaisala order code for the cable gland HMP247CG see Options and Accessories on page 76 VAISALA 83 USER S GUIDE 0508 027 Figure 29 Probe Installation with Cable Gland not available from Vaisala The following numbers refer to Figure 29 above 1 Cable gland AGRO 1160 20 145 T 40 100 C 2 Inpressurized conditions use a locking ring for examp
33. g outputs selectable and scalable Description Value 0 20 mA or 4 20 mA 20 C Typical accuracy of analog output at 0 05 of full scale analog output Typical temperature dependence of 0 005 C 0 003 F of full scale Serial output RS 232 Cable feed through alternatives M12 8 pole connector with 5 m cable or Female 8 pin connector screw joint for cable diameter 4 8 mm Operating voltage 12 35 VDC the maximum operating voltage for device with sensor heating is 24 VDC Power consumption 30 mA with RS 232 Startup time after powerup 3s External load R lt 500 ohm Table 14 Mechanics Specifications Property Description Value Transmitter housing material G AISi10Mg Transmitter base material ABS PC Housing classification IP65 Sensor protection PPS grid with stainless steel net PPS grid Sintered filter Membrane stainless steel filter Stainless steel grid Operating temperature range for electronics 40 60 C 40 140 F Storage temperature 55 80 67 176 F Pressure range HMT314 HMT317 HMT318 0 100 bar 0 10 bar 0 40 bar Probe cable length 2 5 or 10 meters Complies with EMC standard EN61326 1 Industrial environment NOTE When using the current output the RF field susceptibility level according to standard EN61000 4 3 with a frequency band of 110
34. ge can be also turned off if necessary Automatic Chemical Purge Settings VAISALA PUR Turn ON OFF Automatic Chemical Purge This command enables or disables automatic chemical purge Syntax PUR x lt cr gt Where x ON OFF 55 USER S GUIDE Example gt pur off Chemical Purge OFF gt pur on Chemical Purge ON gt PUR Set Chemical Purge Interval If the sensor is exposed to chemicals it is recommended to have the chemical purge done at least once in 720 min 12 hours In applications where the chemical exposure is not likely the interval may be longer It is not recommended to change the other parameters than interval Syntax PUR lt cr gt Issue command PUR and type the new interval in minutes and press Enter five times to finish the command The maximum interval is 14400 minutes 10 days Example gt pur lt cr gt Chemical Purge ON lt cr gt Interval min 1440 lt cr gt Duration s 1 L200 2 lt cr gt Settling s 240 lt cr gt Power FEH 2 lt cr gt Temp diff 0 50 lt cr gt gt NOTE To activate the new interval setting immediately reset the transmitter PURR Chemical Purge in Powerup This command enables or disables the function which turns on chemical purge within 10 seconds from the powerup of the device Syntax PURR x lt cr gt Where x ON OFF default OFF 56 M210619EN D Chapter 4 Operation NOTE When you enable this fun
35. gs Syntax AQTEST x yyy yyy lt cr gt Use command AQTEST to test current values Current output is forced to correspond to the chosen values Where D Output quantity of analog channel use abbreviations see FORM Serial Output Format on page 43 yyy yyy Value Example gt agqtest td 30 lt cr gt CHI Tda 30 0000 C 12 00000mA CH2 x 2 5304 g kg 4 08097mA gt The set values remain valid until you give the command AQTEST without a value or reset the transmitter 53 USER S GUIDE AERR Set Error Outputs Syntax AERR lt cr gt Factory default state for analog outputs during error condition is 0 mA Please be careful when selecting the new error value the error state of the transmitter should not cause problems in process monitoring Example gt paerr lt cr gt Chl error out 0 000mA Ch2 error out 0 000mA NOTE Error output value needs to be within a valid range for output type NOTE The error output value is shown only when there are minor electrical faults such as a humidity sensor open circuit When there is a severe device malfunction like analog output electronics failure or microprocessor ROM RAM failure the error output value is not necessarily shown Chemical Purge Optional General In some specific applications the sensor gain may decrease gradually due to an interference caused by some particular chemical present in the ambient see Figure 16 on page 55 The senso
36. he high humidity environments where even a small temperature differences can cause water to condense on the sensor The sensor heating speeds up the recovery of the humidity sensor from condensation Sensor heating starts up when the relative humidity of the measuring environment reaches the RH value set by a user RH limit The user can define the RH sensor heating temperature as well as the duration of the heating After the heating cycle the humidity conditions are checked and new sensor heating is performed if the predefined conditions are reached again NOTE During the sensor heating the outputs are locked to the values measured before the heating cycle NOTE The maximum operation voltage for device with sensor heating is 24 VDC Setting Humidity Sensor Heating 58 When HMT310 leaves the factory the sensor heating follows the factory default values You can enable or disable the function change the RH limit and define the heating temperature and duration of the heating period Sensor Heating ON OFF Enables or disables the sensor heating Syntax XHEAT x lt cr gt Where x ON OFF default OFF gt xheat on Extra heat ON gt xheat off Extra heat OFF gt M210619EN D Chapter 4 VAISALA Operation Setting Heating Parameters Whenever the RH value seen by the sensor exceeds the predefined RH limit the humidity sensor is warmed up to the predefined temperature The du
37. igure 17 on page 70 M210619EN D Chapter 7 Calibration and Adjustment 2 Issue command LI and enter value 0 for an offset value and value 1 for a gain value H Issue command CDATE and set the calibration date Example gt cdate 2001 12 11l lt cr gt Calibration 2001 12 11 gt ACAL Analog Output Calibration Syntax ACAL lt cr gt Connect the HMT310 to a multimeter in order to measure either current or voltage depending on the selected output type Issue the ACAL command Then type the multimeter reading and press Enter Example current outputs gt acal lt cr gt Chl TI mA 2 046 lt cr gt Ch1 T2 mA 18 087 lt cr gt Ch2 TL mA 2 7036 LCE Ch2 I2 mA 18 071 lt cr gt gt Relative Humidity Calibration and Adjustment in Two Points Use two reference humidities over the measurement range The references need to have a difference of at least 50 RH Before calibration HMT310 needs to be set to adjustment mode by pressing the adjustment button once see Figure 17 on page 70 To return to normal operation mode use command RESET see RESET Reset Transmitter on page 50 VAISALA 69 USER S GUIDE 0507 048 Figure 17 Location of Adjustment Button NOTE If using a warmed probe HMT317 option or sensor heating function the heating is interrupted when the adjustment button is pressed Allow sufficient time for the probe to reach ambient temperature and then start th
38. into the fitting screw and attach the nut manually to the fitting screw so that the connection feels tight 4 Mark both the fitting screw and the nut hex im 0507 040 Figure 8 HMT314 Installation M210619EN D Chapter 3 Installation The following numbers refer to Figure 8 on page 26 Tightening cone Nut Fitting screw Sealing washer Probe 12 mm M22x1 5 or NPT 1 2 Ch LN E GO HA ra Il 5 Tighten the nut a further 30 1 12 turn or if you have a torque spanner tighten it with a torque of 80 10 Nm 60 7 ft lbs 0505 273 Figure 9 Marking the Nut NOTE After detachment the nut must be tightened without increased effort 6 Clean and grease the tightening cone of the fitting screw after every tenth detachment Change the sealing washer every time the fitting screw is detached Use high vacuum grease for example Down Corning Europe or a similar grease See also Chapter 5 Measuring at Overpressure on page 61 CAUTION In pressurized processes it is essential to tighten the supporting nuts and screws very carefully to prevent loosening of the probe by the action of pressure VAISALA 27 USER S GUIDE NOTE When HMT314 is installed in a process with pressure differing from normal atmospheric pressure please enter the pressure value of the process in hPa or mbar into the transmitter memory via the serial line see PRES Set Ambient Pressure for Calcula
39. l filter take care to tighten the filter properly recommended force is 130 Nem New filters can be ordered from Vaisala see Parts List for Consumables on page 64 Sensor Change You can change Vaisala HUMICAP 180R sensors 63 USER S GUIDE 1 Remove the filter from the probe 2 Remove the damaged sensor and insert a new one Handle the new sensor by the plastic socket CAUTION Do not touch the sensor plate 3 After sensor change the humidity calibration must be made according to the instructions see FCRH Relative Humidity Calibration after Sensor Change on page 68 4 Install a new filter on the probe When using the stainless steel filter take care to tighten the filter properly recommended force is 130 Nem New sensors can be ordered from Vaisala see Parts List for Consumables below Parts List for Consumables Table 10 Available Spare Parts Spare Part Order Code PPS Plastic Grid with Stainless Steel Netting DRW010281SP PPS Plastic Grid Filter DRW010276SP Sintered Filter AISI 316L HM47280SP Stainless Steel Filter HM47453SP Stainless Steel Filter with Membrane 214848SP Vaisala HUMICAP 180R general purpose _ HUMICAP180R PT100 sensor 10429SP Technical Support For technical questions contact the Vaisala technical support E mail helpdesk vaisala com Fax 358 9 8949 2790 64 M210619EN D Chapter 6 Maintenance Return Instructions If the prod
40. le 11x 1 DIN471 The installation option in Figure 29 above is not available from Vaisala and is presented here only as an example of how to achieve a vapor tight installation with HMT313 317 probes Ball Valve Installation kit for HMT318 The ball valve installation kit Vaisala order code BALLVALVE 1 is preferred when connecting the probe to a pressurized process or pipeline Use the ball valve set or a 1 2 ball valve assembly with a ball hole of 14 mm or more If you install the probe 12 mm in a process pipe please note that the nominal size of the pipe must be at least 1 inch 2 54 cm Use the manual press handle to press the probe into the pressurized lt 10 bar process or pipeline 84 M210619EN D Appendix A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES 0507 043 Figure 30 Installing the HMT318 Probe Through a Ball Valve Assembly The following numbers refer to Figure 30 above Manual press tool Handle of the ball valve Probe Process chamber or pipeline Groove on the probe indicates the upper adjustment limit Filter Ball of the ball valve Clasp nut GO JC Dn E GOH rt H NOTE The probe can be installed in the process through the ball valve assembly provided that the process pressure is less than 10 bars This way the process does not have to be shut down when installing or removing the probe However if the process is shut down before removing the probe the process press
41. le 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Manual Revisions snsesnnneene nenne en nester rnnt tn nnnt tn nnntrnnnnenn ranerne nn 10 HMT310 Output Ouantttes eeaeee eenen re er resrre erreen 20 HMT318 Probe Dimensions cccccccceeeseeeeceeeeeeeseestceeeeees 29 Entering Serial Parameters in Windows 2000 and Windows Ch EE EE 36 Quantity Abbreviations for FORM Commande 44 M s ien a eaa deeteeessntenavass connie TY 44 Output Quantities and their Metric and Nonmetric Units 46 Pressure Conversion Chart 49 Output Quantities and their Metric and Nonmetric Units 52 Available Spare Parts 64 Relative Humidity Specifications c cccceeeeeeceeeteeeeeteeeeneees 73 Temperature Specifications and Operating Pressure Ranges eegene See 74 Electronics Specifications eiee reiese erreneren 75 Mechanics Specifications cccccceccececeeeeeeseeceereeseeeeseneeeeaees 75 Options and ACcessories neren tsen nstnneennens 76 USER S GUIDE This page intentionally left blank 8 M210619EN D Chapter 1 General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the product About This Manual This manual provides information for installing operating and maintaining Humidity and Temperature Transmitter HMT310 Contents of This Manual This manual consists o
42. lt cr gt Output interval 1 H SEND Output Reading Once Syntax in STOP mode SEND lt cr gt Syntax in POLL mode SEND aa lt cr gt Where aa Address of the transmitter when more than one transmitter is connected to a serial bus 0 99 SMODE Set Serial Interface Mode Syntax SMODE x lt cr gt Where x STOP RUN POLL STOP mode Transmitter in standby for serial commands RUN mode Transmitter outputs data continuously POLL mode Transmitter only responds to addressed command M210619EN D Chapter 4 VAISALA Operation Example gt smode run lt cr gt Output mode RUN gt smode stop lt cr gt Output mode STOP SERI Serial Line Settings Syntax SERI b p d s lt cr gt Where b bauds 300 600 1200 2400 4800 9600 19200 parity n none e even o odd data bits 7 or 8 stop bits 1 or 2 D d S The settings can be changed one parameter at a time or all parameters at once Example gt seri o lt cr gt changing parity only 48000 7 1 gt seri 600 n 8 l lt cr gt changing all parameters 600 n 8 1 ADDR Set Transmitter Address for Use in POLL Mode Syntax ADDR aa lt cr gt Where aa Address 0 99 Example gt addr lt cr gt Address H gt addr l lt cr gt Address sa 41 USER S GUIDE 42 OPEN Temporarily Open Transmitter from POLL Mode to Receive Serial Commands Syntax OPEN nn lt cr gt Where nn Address of the transmitter
43. mand enables or disables output of time and date to the serial line UNIT Select Metric or Nonmetric Output Units Syntax UNIT x lt cr gt Where x MorN M metric units N nonmetric units 45 USER S GUIDE Table 7 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity RH RH T Temperature C oF TDF Dewpoint frostpoint C F TD Dewpoint S oF A Absolute humidity g m gr ft X Mixing ratio g kg gr lb TW Wet bulb temperature C oF PPM Humid air volume dry air volume Ppm ppm PW Water vapor pressure hPa Ib in PWS Saturation water vapor pressure hPa Ib in H Enthalpy kJ kg Btu lb Example gt unit m lt cr gt Output units metric gt unit n lt cr gt Output units non metric gt FST Output State of Chemical Purge or Sensor Heating with SEND and R Commands Syntax FST x lt cr gt Where x ON OFF default OFF Example gt fst on lt cr gt Form status ON gt send iN 0 RH 40 1 RH T 24 0 C Td 9 7 C Tdf 9 7 C a 8 7 g m3 x 7 5 g kg Tw 15 6 C ppm 11980 pw 12 00 hPa pws 29 91 hPa h 43 2 kJ kg gt purge lt cr gt Purge started press any key to abort gt send lt cr gt gs 134 RH 40 2 RH T 24 1 C Td 9 8 C Tdf 9 8 C a 8 8 g m3 x E 46 M210619EN D Chapter 4 Operation g kg Tw 15 7 C ppm 12084 pw 12 10 hPa pws 30 11 hP
44. mended that the probes with a cable are mounted with the probe horizontal this way any water condensing on the tube cannot flow onto the sensor D 0507 024 Figure 6 Horizontal Mounting of Probe The following numbers refer to Figure 6 above 1 To be sealed To be insulated Insulate Let the cable hang loosely This prevents condensed water running to the sensor along the cable 2 3 4 When there is no alternative but to install the probe in the process vertically the point of entry must be carefully insulated The cable must M210619EN D Chapter 3 Installation also be allowed to hang loosely as this prevents any condensed water from running onto the probe along the cable 1 3 e E g Figure 7 Vertical Mounting of Probe 0507 022 The following numbers refer to Figure 7 above 1 To be sealed Insulate the cable To be insulated Let the cable hang loosely This prevents condensed water running to the sensor along the cable 2 3 4 NOTE Please do not attach a heated probe HMT317 to metal structures to avoid condensation problems caused by heat conduction along the metal VAISALA If the process temperature is much higher than that of the environment the whole probe and preferably a piece of the cable must be inside the process This prevents measuring inaccuracies caused by heat conduction along the cable When mounted on the side of a duct or
45. n 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 13 USER S GUIDE 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 the allegedly defective Product or part shall should Vaisala 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 repla
46. ning of the probe by the action of pressure CAUTION Take care not to damage the probe body A damaged body makes the probe less tight and may prevent it from going through the clasp nut ESD Protection Electrostatic Discharge ESD can cause immediate or latent damage to electronic circuits Vaisala products are adequately protected against ESD for their intended use However it is possible to damage the product by delivering electrostatic discharges when touching removing or inserting any objects inside the equipment housing To make sure you are not delivering high static voltages yourself Handle ESD sensitive components on a properly grounded and protected ESD workbench When this is not possible ground yourself to the equipment chassis before touching the boards Ground yourself with a wrist strap and a resistive connection cord When neither of the VAISALA 11 USER S GUIDE above is possible touch a conductive part of the equipment chassis with your other hand before touching the boards Always hold the boards by the edges and avoid touching the component contacts Recycling fs Recycle all applicable material Dispose of batteries and the unit according to statutory regulations Do not dispose of with regular household refuse Regulatory Compliances The Humidity and Temperature Transmitter HMT310 complies with the following performance and environmental test standards Compli
47. que spanner tighten the nut to max 45 5 Nm 33 4 ft lbs Refer to Figure 12 on page 30 NOTE Take care not to tighten the clasp nut more than 60 to avoid difficulties when opening it If you wish to remove the probe from the process note that you have to pull the probe out far enough You cannot close the valve if the groove on the probe body is not visible 86 M210619EN D www vaisala com M2170619 EN
48. r polymer absorbs the interfering chemical this reduces the ability of the polymer to absorb water molecules and so decreases the sensor gain In chemical purge heating the humidity sensor to a temperature level of approximately 180 C for several minutes evaporates the interfering chemical The purge function starts with heating stage continues with settling and when the temperature of the sensor is decreased transmitter returns to normal mode The whole cycle takes about 8 minutes NOTE Chemical purge function locks the output values for about 8 minutes 54 M210619EN D Chapter 4 Operation A 1 l i l 1 I 1 I F 4d i 1 i l i i i i Calibration I i i i i values ens eter tae E E ee ae Chemical purge I E E ES resin ee Se Pie pees cae Se kg f Measured values S i after chemical K i SC EE E E exposure a fe 6 l EE UE EE af er Humidity 0507 056 Figure 16 Decrease of Sensor Gain Due to Interfering Chemical and Effect of Chemical Purge Process Automatic Manual Chemical Purge When HMT310 leaves the factory the automatic chemical purge if selected takes place repeatedly with the time intervals set in the factory You can change the interval in which the purge takes place by using serial commands This may be necessary if the measuring environment contains high concentrations of interfering chemicals The automatic chemical pur
49. ration of the heating can also be defined After the heating cycle the humidity conditions are checked and a new sensor heating is activated if the predefined conditions are reached again Syntax XHEAT lt cr gt Type the values after the question mark The ranges available Extra heat RH limit 0 100 RH default 95 RH heating function starts up above the setpoint Extra heating temperature 0 200 C default 100 C Extra heating time 0 255 s default 30 s Example gt xheat Extra heat Extra heat Extra heat Extra heat gt xheat on Extra heat gt RH ORE 0 Me 20 temp time 100 85 30 10 ON 59 USER S GUIDE This page intentionally left blank 60 M210619EN D Chapter 5 Measuring at Overpressure CHAPTER 5 MEASURING AT OVERPRESSURE CAUTION This chapter contains important information concerning the use of HMT310 in overpressure conditions HMT314 and HMT318 are designed for humidity measurement at overpressure The maximum measurement pressures depend on the probe as follows HMT314 0 100 bar 10 MPa for pressurized rooms and processes probe is provided with a nut fitting screw and sealing washer HMT318 0 40 bar 4 MPa for pressurized pipelines ball valve set available The actual pressure in the sampling cell needs to be set to the transmitter by using the serial line command PRES Set Ambient Pressure for Calculation
50. s In pressurized processes it is essential to tighten the supporting nuts and screws very carefully to prevent loosening of the probe by the action of pressure Pressure Regulator Recommended VAISALA When sampling pressurized processes exceeding the maximum measurement pressure of the probe the pressure in the measurement chamber must be regulated to acceptable level or below It is recommended to use a pressure regulator before the measurement chamber to prevent significant pressure variations 61 USER S GUIDE This page intentionally left blank 62 M210619EN D Chapter 6 Maintenance CHAPTER 6 MAINTENANCE This chapter provides information that is needed in basic maintenance of HMT310 and lists contact information for technical support and Vaisala Service Centers Periodic Maintenance Calibration Interval HMT310 is fully calibrated and adjusted as shipped from factory Typical calibration interval is one year In certain applications it may be advisable to do more frequent checks Calibration needs to be done always when there is reason to believe that the device is not within the accuracy specifications You can carry out calibration and adjustment by yourself or you can send the transmitter to Vaisala Service Centers for recalibration Replacing Consumables VAISALA Filter Change Remove the filter from the probe 2 Install a new filter on the probe When using the stainless stee
51. sting Analog Outputs 004 51 AMODE Set Analog Outputs 0 4 20 m 51 ASEL Select Parameter for Analog Outputs s seeeeeeeess 51 ASCL Scale Analog Outputs sssesseeseseeeeeeeee eeen eesr reene nees 52 ITEST Test Analog Outputs ccsceeeeeeeseeeeeeteeeeeeeees 53 AQTEST Test Analog Outputs for Desired Readings 53 AERR Set Error Outputs ccecceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaes 54 Chemical Purge Optional ccssssseeeeseeeseeeesseeeneneneees 54 General ereraa Made ca lite i a N E a 54 Automatic Manual Chemical Purge cccccseeeeseeeeeeees 55 Automatic Chemical Purge Settings sccsssessseeeeeees 55 PUR Turn ON OFF Automatic Chemical Pure 55 PUR Set Chemical Purge Internal 56 PURR Chemical Purge in Powerp 56 Chemical Purge Activated Manuallly ccssscssseeeeeeeees 57 Starting Manual Chemical Pure 57 Sensor Heating ccsccccseeceeeeeeeeeeesceeseneeeeneeeeesseeseseeeenseeeeeseees 57 General a EE 57 Setting Humidity Sensor Heating ssssssnsennseunnnennennnennnnnn 58 Sensor Heating ON OFF ccccceeeeeeeeeseeeeeseeeeeneeeeeeeees 58 Setting Heating Parameters 0 cccccesceeeeeeeeeeeeeeteeteeeeees 59 CHAPTER 5 MEASURING AT OVERPRESSURE 2 2 ccscceeceeeeceeeeeeeeeeeeeneeenenenseennees 61 4 M210619EN D Pressure Regulator Recommended 2 ccccsssssseeeeeeerees 61 CHAPTER 6 MAINTENANCE ege
52. struments Vanha Nurmijarventie 21 01670 Vantaa FINLAND Phone 358 9 8949 2658 Fax 358 9 8949 2295 North American Service Center Controlled Environments and Instruments 10 D Gill Street Woburn MA 01801 USA Phone 800 408 9456 Fax 1 781 933 8029 Japan Service Center 42 Kagurazaka 6 Chome Shinjuku ku Tokyo 162 0825 JAPAN Phone 81 3 3266 9611 Fax 81 3 3266 9610 China Service Center Floor 2 EAS Building No 21 Xiao Yun Road Dongsanhuan Beilu Chaoyang District Beijing 100027 CHINA Phone 86 10 8526 1199 Fax 86 10 8526 1155 www vaisala com 66 M210619EN D Chapter 7 Calibration and Adjustment CHAPTER 7 CALIBRATION AND ADJUSTMENT This chapter describes the relative humidity and temperature adjustment procedures After adjustment the original calibration certificate shipped with the product is not valid anymore Calibration and Adjustment Commands LI Revert Factory Calibration Syntax Ll lt cr gt This command reverts only the CRH calibration see calibration instructions starting on page 69 1 Remove the transmitter unit from the mounting plate see Mounting the Transmitter Removing the Transmitter Unit on page 21 and press the adjustment button once see Figure 17 on page 70 2 Issue command LI and enter value 0 for an offset value and value 1 for a gain value 3 Reser the transmitter by issuing the RESET command Transmitter returns to normal mode Example g
53. t li lt cr gt RH offset 0 6000000 0 RH gain 1 00000000 1 T offset 0 00000000 0 T gain 0 40000000 1 gt VAISALA 67 USER S GUIDE 68 FCRH Relative Humidity Calibration after Sensor Change Syntax FCRH lt cr gt The transmitter asks and measures relative humidity and calculates the calibration coefficients This two point adjustment needs to be performed after a sensor change Follow the more detailed calibration instructions on page 69 but instead of the CRH command use the FRCH command Example gt frch lt cr gt RH S 1 82 1 ref O lt cr gt Press any key when ready lt cr gt RH 74 22 2 ref 75 lt cr gt OK gt The OK indicates that the calibration has succeeded CTEXT Set Calibration Information Text Syntax CTEXT lt cr gt 1 Remove the transmitter unit from the mounting plate see Mounting the Transmitter Removing the Transmitter Unit on page 21 and press the adjustment button once see Figure 17 on page 70 2 Issue command LI and enter value 0 for an offset value and value 1 for a gain value 3 Issue command CTEXT and enter calibration information text Example gt ctext lt cr gt Cal info Vaisala HEL HMK15 lt cr gt gt CDATE Set Calibration Date Syntax CDATE yyyy mm dd lt cr gt 1 Remove the transmitter unit from the mounting plate see Mounting the Transmitter Removing the Transmitter Unit on page 21 and press the adjustment button once see F
54. ter vapor pressure PWS Saturation water vapor pressure H Enthalpy NOTE Only quantities selected when ordering the device can be selected for an output quantity 44 Table 6 Modifiers Modifier Description x y Length modifier whole numbers and decimal places t Tabulator r Carriage return n Line feed Se String constant U5 Unit field and length unit can be changed with command UNIT Examples gt form TD 5 2 TD r n lt cr gt TD 3 65 gt form TD TD U3 t TDF TDF U3 r n lt cr gt TD el La TDF 3 EE gt Command FORM returns the default output form gt form lt cr gt gt send lt cr gt RH 28 0 RH T 23 3 C TIME DATE Setting Time and Date Syntax TIME lt cr gt Syntax DATE lt cr gt M210619EN D Chapter 4 Operation Sets the time and date to the transmitter Example gt time lt cr gt Current time is 04 12 39 Enter new time hh mm ss 12 24 00 lt cr gt gt date lt cr gt Current date is 2000 01 01 Enter new date yyyy mm dd 2004 06 30 lt cr gt gt NOTE Time and date are cleared to 2000 01 01 00 00 00 at reset NOTE Only about 1 accuracy is obtained with the software clock VAISALA FTIME FDATE Add Time and Date to SEND and R Outputs Syntax FTIME x lt cr gt Syntax FDATE x lt cr gt Where x ON OFF The com
55. th information that is intended to help you install this product Selecting Location Finding a suitable site for the Humidity and Temperature Transmitter HMT310 is important for getting representative ambient measurements The site should represent the general area of interest Mounting Mounting the Transmitter Removing the Transmitter Unit Select a place with stable conditions for mounting the transmitter Do not expose the transmitter to direct sunlight or rain NOTE If the transmitter is mounted outdoors cover it with a shelter purchased by customer Always mount the transmitter housing with the cable bushings pointing downwards VAISALA 1 Mount the plate onto the wall with four two screws 4 5 mm 6 0 mm 2 Place the transmitter onto the mounting plate and fasten it with two Allen screws The transmitter module can be unfastened for calibration by releasing the two Allen screws on the left side 21 USER S GUIDE 22 0507 034 Figure 3 Mounting with Mounting Plates The following letters and numbers refer to Figure 3 above A B 1 Mounting with larger mounting plate Mounting with smaller mounting plate Two Allen screws for fastening or removing the transmitter module Allen key provided Four screw holes 4 5 mm for wall mounting screws not provided Two screw holes 6 0 mm on the base of the plate for wall mounting screws not provided M210619EN D Installa
56. tion Chapter 3 VAISALA 72 5 2 85 12 0 47 60 5 2 38 6 0 24 mi L e N C T Si Sey W oa s t Cl Teo oO N SS 2 SC R I OI es oo vr x CO CA O c e l Z e 19 0 75 48 5 1 91 A B 0507 035 Figure 4 Mounting Plate Dimensions The following letters refer to Figure 4 above A Larger mounting plate dimensions B Smaller mounting plate dimensions Mounting the Probes Do not unsolder and then again resolder the probe cable from the mother board during installation this may alter the humidity calibration of the transmitter Beware of Temperature Differences In humidity measurement and especially in calibration it is essential that the temperature of the probe and the measuring environment is the same Even a small difference in temperature between the environment and the probe causes an error As the curve in Figure 5 on page 24 shows if the temperature is 20 C and the relative humidity 100 RH a difference of 1 C between the environment and the probe causes an error of 6 RH 23 USER S GUIDE 24 10 9 8 T 7 S 6 Ss ae 4 3 2 1 0 Temper ature C 0507 036 Figure 5 Measurement Error at 100 RH when Difference Between Ambient and Sensor Temperature is 1 C General Instructions for Probes with Cable It is recom
57. tions on page 48 28 HMT315 for High Temperatures HMT315 is installed similarly than the HMT313 probe but without the supporting bar Refer to Appendix A on page 81 for more information on the duct installation kit for HMT315 To avoid incorrect humidity readings the temperature differences between inside and outside of the duct must not be remarkable HMT317 for Demanding Processes The HMT317 is for environment where relative humidity is very high near saturation The warmed probe prevents the saturation of the sensor See Appendix A on page 81 for a presentation of the following probe installation kits for HMT317 with installation examples Duct mounting kit Cable gland Pressure tight Swagelok connector M210619EN D Installation Chapter 3 VAISALA HMT318 for Pressurized Pipelines Due to the sliding fit the HMT318 is easy to install into and remove from the pressurized process The probe is especially suitable for the measurements in pipelines See section Ball Valve Installation kit for HMT318 on page 84 0507 041 Figure 10 HMT318 Probe Dimensions in mm The following numbers refer to Figure 10 above 1 2 Clasp nut 24 mm hex nut Fitting body 27 mm hex head The following two fitting body options are available Fitting Body ISO1 2 solid structure Fitting Body NPT1 2 solid structure Table 3 HMT318 Probe Dimensions Probe Type Adjustment Range Standard 178 mm 120 mm
58. uct needs repair please follow the instructions below to speed up the process and to avoid extra costs to you VAISALA Read the section Warranty on page 13 2 Contact a Vaisala Service Center or a local Vaisala representative The latest contact information and instructions are available from www vaisala com Addresses of the Service Centers are provided in section Vaisala Service Centers on page 66 Please have the following information on hand serial number of the unit date and place of purchase or last calibration description of the fault circumstances in which the fault occurs occurred name and contact information of a technically competent person who can provide further information on the problem 3 Pack the faulty product in a strong box of adequate size with proper cushioning material to avoid damage 4 Include the information specified in step 2 in the box with the faulty product Also include a detailed return address 5 Ship the box to the address specified by your Vaisala contact 65 USER S GUIDE Vaisala Service Centers Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services See contact information below Vaisala Service Centers also offer accredited calibrations maintenance contracts and a calibration reminder program Do not hesitate to contact them to get further information European Service Center Finland Controlled Environments and In
59. ure can be max 20 bars NOTE When measuring temperature dependent quantities make sure that the temperature at the measurement point is equal to that of the process otherwise the moisture reading may be incorrect VAISALA 85 USER S GUIDE Follow the steps below to install the HMT318 probe through a ball valve assembly After the installation the probe should be sitting in the process chamber or pipeline as shown in Figure 30 on page 85 l o ot on x 10 Shut down the process if the process pressure is more than 10 bars If the pressure is lower there is no need to shut down the process Close the ball valve Seal the threads on the fitting body refer to Figure 11 on page 30 Attach the fitting body to the ball valve and tighten it Slide the clasp nut of the probe toward the filter as far as it will go Insert the probe to the fitting body and manually tighten the clasp nut to the fitting body Open the ball valve Push the probe through the ball valve assembly into the process If the pressure is high use the pressing handle that is provided with the probe If you push the probe hard without using the handle you may damage the cable Note that the probe must be pushed so deep that the filter is completely inside the process flow Mark the fitting screw and the clasp nut Tighten the clasp nut with a fork spanner a further 50 60 ca 1 6 turn If you have a suitable tor
60. x ON OFF or EXT ON Short filter of about 15 s results the average value of the last 15 s measurement data OFF No filtering default EXT Extended filter of about 1 min results the average value of the last 1 min measurement data RESET Reset Transmitter Syntax RESET lt cr gt ERRS Display Error Messages Syntax ERRS lt cr gt Display transmitter error messages If there are no errors present a PASS will be returned Examples gt errs lt cr gt PASS gt gt errs lt cr gt FAIL Error Temperature measurement malfunction Error Humidity sensor open circuit gt M210619EN D Chapter 4 Operation Setting Scaling and Testing Analog Outputs AMODE Set Analog Outputs 0 4 20 mA Syntax AMODE chl ch2 lt cr gt Where chl and ch2 0 0 20mA Tl 4 20mA Example gt amode il il lt cr gt Chl output mode 4 20mA Ch2 output mode 4 20mA gt ASEL Select Parameter for Analog Outputs Syntax ASEL xxx yyy lt cr gt Where XXX yyy Quantity of channel 1 Quantity of channel 2 Use abbreviations shown in Table 9 on page 52 VAISALA 51 USER S GUIDE Table 9 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity RH RH T Temperature C PE TDF Dewpoint frostpoint C F TD Dewpoint C oF A Absolute humidity g m gr ft X Mixing ratio g kg gr lb TW Wet
Download Pdf Manuals
Related Search