User manual VAISALA HMT310

[. . . ] USER'S GUIDE Vaisala HUMICAP® Humidity and Temperature Transmitter HMT310 M210619EN-C PUBLISHED BY Vaisala Oyj P. O. Box 26 FIN-00421 Helsinki Finland Phone (int. ): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www. vaisala. com/ © Vaisala 2007 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale. ________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 99] SMODE [STOP/RUN/POLL] SERI [baud p d s] ADDR [0 . . . 99] CLOSE Start continuous outputting Stop continuous outputting Set continuous output interval for RUN-mode Output reading once Set serial interface mode Serial line settings (default: 4800 E 7 1) baud: 300. . . 19200 Set transmitter address for Use in POLL-mode Temporarily open transmitter from POLL-mode to receive commands Set transmitter in POLL-mode VAISALA____________________________________________________________________ 33 USER'S GUIDE____________________________________________________________________ Output formatting FORM TIME DATE FTIME [ON/OFF] FDATE [ON/OFF] UNIT FST [ON/OFF] 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 Other commands ?ECHO [ON/OFF] FIND HELP PRES XPRES FILT RESET ERRS Setting, scaling and testing analog outputs AMODE Set analog outputs (0/4 . . . 20 mA) ASEL Select parameter for analog outputs ASCL Scale analog outputs ITEST Test analog outputs AQTEST Test analog outputs for desired readings AERR Set error outputs 34 _______________________________________________________________ M210619EN-C Chapter 4 ________________________________________________________________ Operation Calibration and adjustment (these are presented in Chapter 7, section Calibration and Adjustment Commands on page 64) CRH Relative humidity calibration CT Temperature calibration LI Revert factory calibration FCRH Relative humidity calibration after sensor change CTEXT Set calibration information text CDATE Set calibration date ACAL Analog output calibration Chemical purge PUR [ON/OFF] PURGE PURR [ON/OFF] Enable or disable automatic chemical purge Activate chemical purge Enable or disable automatic chemical purge in power up Enable or disable sensor heating Sensor heating XHEAT [ON/OFF] Measurement Output R Start Continuous Outputting Syntax: R<cr> 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: >r<cr> RH= 28. 0 RH= 28. 0 RH= 28. 0 RH= 28. 0 RH= 28. 0 RH= 28. 0 %RH %RH %RH %RH %RH %RH T= T= T= T= T= T= 23. 3 23. 3 23. 3 23. 3 23. 3 23. 3 'C 'C 'C 'C 'C 'C VAISALA____________________________________________________________________ 35 USER'S GUIDE____________________________________________________________________ S Stop Continuous Outputting Syntax: S<cr> Stops the continuous output. Also the Esc key (on your computer keyboard) can be used to stop outputting. INTV Set Continuous Output Interval for RUN-Mode Syntax: INTV xxx yyy<cr> where xxx yyy Example: >intv 1<cr> Output interval: 1 S >intv 1 min<cr> Output interval: 1 MIN >intv 1 h<cr> Output interval: 1 H = = Output interval (0 . . . 255) Unit (s, min or h) SEND Output Reading Once Syntax in STOP-mode: SEND<cr> Syntax in POLL-mode: SEND aa<cr> where aa = Address of the transmitter when more than one transmitter is connected to a serial bus (0 . . . 99) 36 _______________________________________________________________ M210619EN-C Chapter 4 ________________________________________________________________ Operation SMODE Set Serial Interface Mode Syntax: SMODE x<cr> 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 Example: >smode run<cr> Output mode : RUN >smode stop<cr> Output mode : STOP SERI Serial Line Settings Syntax: SERI b p d s<cr> where b p d s = = = = 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) The settings can be changed one parameter at a time or all parameters at once: Example: >seri o<cr> 4800 o 7 1 >seri 600 n 8 1<cr> 600 n 8 1 changing parity only changing all parameters VAISALA____________________________________________________________________ 37 USER'S GUIDE____________________________________________________________________ ADDR Set Transmitter Address for Use in POLL-Mode Syntax: ADDR aa<cr> where aa Example: >addr<cr> Address >addr 1<cr> Address :0 :1 = Address (0 . . . 99) OPEN Temporarily Open Transmitter from POLL-Mode to Receive Serial Commands Syntax: OPEN nn<cr> where nn = Address of the transmitter (0 . . . 99) The OPEN command sets the bus temporarily in STOP-mode so that the SMODE command can be issued. Example: >open 4<cr> Device: 4 line opened for operator commands > 38 _______________________________________________________________ M210619EN-C Chapter 4 ________________________________________________________________ Operation CLOSE Set Transmitter in POLLMode Syntax: CLOSE<cr> 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 POLLmode. Example: Relative humidity calibration is performed at transmitter 2, which is in POLL-mode. >open 2<cr> Opens the line to transmitter 2. >crh<cr> Calibration started. . . . >close<cr> Line closed. Output Formatting FORM Serial Output Format Syntax: FORM x<cr> where x = Formatter string Command format can be used to change the format of the output commands SEND and R. VAISALA____________________________________________________________________ 39 USER'S GUIDE____________________________________________________________________ Format string consists of quantities and modifiers: use the quantity abbreviations and modifiers presented in Table 5 below and in Table 6 below when selecting the output quantities. Table 5 Abbreviation RH T TDF TD A X TW PPM PW PWS H Quantity Abbreviations for FORM Command Quantity Relative humidity Temperature Dewpoint/Frostpoint Dewpoint Absolute humidity Mixing ratio Wet bulb temperature Humid air volume/dry air volume Water vapor pressure Saturation water vapor pressure Enthalpy NOTE Only quantities selected when ordering the device can be selected for an output quantity. Table 6 Modifier x. y #t #r #n "" U5 Modifiers Description Length modifier (whole numbers and decimal places) Tabulator Carriage return Line-feed String-constant Unit field and length (unit can be changed with command UNIT) Examples: >form "TD=" 5. 2 TD #r#n<cr> TD= -3. 65 >form "TD=" TD U3 #t "TDF=" TDF U3 #r#n<cr> TD= -4. 0'C TDF= -3. 6'C > Command FORM / returns the default output form: >form /<cr> >send<cr> RH= 28. 0 %RH T= 23. 3 'C 40 _______________________________________________________________ M210619EN-C Chapter 4 ________________________________________________________________ Operation TIME, DATE Setting Time and Date Syntax: TIME<cr> Syntax: DATE<cr> Sets the time and date to the transmitter. Example: >time<cr> Current time is 04:12:39 Enter new time (hh:mm:ss) ?12:24:00<cr> >date<cr> Current date is 2000-01-01 Enter new date (yyyy-mm-dd) ?2004-06-30<cr> > 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. FTIME, FDATE Add Time and Date to SEND and R Outputs Syntax: FTIME x<cr> Syntax: FDATE x<cr> where x = ON/OFF The command enables or disables output of time and date to the serial line. VAISALA____________________________________________________________________ 41 USER'S GUIDE____________________________________________________________________ UNIT Select Metric or Nonmetric Output Units Syntax: UNIT x<cr> where x = M or N M = metric units N = nonmetric units Table 7 Output Quantities and their Metric and Nonmetric Units Metric Unit %RH °C °C °C g/m3 g/kg °C ppm hPa hPa kJ/kg Nonmetric Unit %RH °F °F °F gr/ft3 gr/lb °F ppm lb/in2 lb/in2 Btu/lb Quantity RH Relative Humidity T Temperature TDF Dewpoint/frostpoint TD Dewpoint A Absolute humidity X Mixing ratio TW Wet bulb temperature PPM Humid air volume/dry air volume PW Water vapor pressure PWS Saturation water vapor pressure H Enthalpy Example: >unit m<cr> Output units >unit n<cr> Output units > : metric : non metric 42 _______________________________________________________________ M210619EN-C Chapter 4 ________________________________________________________________ Operation FST Output State of Chemical Purge or Sensor Heating (with SEND and R Commands) Syntax: FST x<cr> where x Example: >fst on<cr> Form. status : ON >send 1 N 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 >purge<cr> Purge started, press any key to abort. 1 = ON/OFF (default = OFF) >send<cr> S 134 RH= 40. 2 %RH T= 24. 1 'C Td= 9. 8 'C Tdf= 9. 8 'C a= 8. 8 g/m3 x= 7. 5 g/kg Tw= 15. 7 'C ppm= 12084 pw= 12. 10 hPa pws= 30. 11 hPa h= 43. 5 kJ/kg > For more information about chemical purge, see pages 52 through 55. For more information about sensor heating, see pages 56 through 57. 1 Letters and values indicating the state of the probe: xxx = probe heat power (W) xxx = sensor temperature (°C) xxx = sensor temperature (°C) xxx = sensor temperature (°C) N . . . xxx sensor cooling after purge VAISALA____________________________________________________________________ 43 USER'S GUIDE____________________________________________________________________ Other Commands ? [. . . ] This helps to prevent errors caused by heat conduction in the bar and cable. Pressure-Tight Swagelok Installation Kits (for HMT317) RH Probe Installation 80 mm 38 mm P = max 10 bar 1 2 3 4 5 Figure 20 Swagelok Installation Kit for RH Probe The following numbers refer to Figure 20 above: 1 2 3 4 5 = = = = = Relative humidity probe Duct connector ISO3/8" or NPT1/2" thread Swagelok connector Ferrules VAISALA____________________________________________________________________ 81 USER'S GUIDE____________________________________________________________________ Examples of Vapor-Tight Installations with Cable Gland RH Probe Installations (for HMT313/317) 1 3 2 0508-026 Figure 21 Cable Installation with Cable Gland AGRO The following numbers refer to Figure 21 above: 1 2 3 = = = Nut (to be tightened to the body) Seal Body and O-ring Vaisala order code for the cable gland: HMP247CG (see Table 15 Options and Accessories on page 75). 82 _______________________________________________________________ M210619EN-C Appendix A _________________________________ Probe Installation Kits and Installation Examples 1 2 0508-027 Figure 22 Probe Installation with Cable Gland (not available from Vaisala) The following numbers refer to Figure 22 above: 1 2 = = Cable gland AGRO 1160. 20. 145 (T = -40 . . . +100 °C) In pressurized conditions, use a locking ring (for example, 11x 1 DIN471) The installation option in Figure 22 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 HMP318 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 ø14 mm or more. If you install the probe (ø12 mm) in a process pipe, please note that the nominal size of the pipe must be at least 1 inch (2. 54 cm). [. . . ]