User manual VAISALA MMT310

[. . . ] USER'S GUIDE Vaisala HUMICAP® Moisture and Temperature Transmitter Series for Oil MMT310 M210474EN-B 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 2008 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Give commands by typing them on your computer. This page presents the command list, the commands are described in details later in this chapter. Measurement output R S INTV [0. . . 255 S/MIN/H] SEND [0. . . 99] SMODE [STOP/RUN/POLL] SERI [baud p d s] ADDR [0. . . 99] CLOSE OPEN [0. . . 99] Output formatting FORM DATE TIME FDATE [ON/OFF] FTIME [ON/OFF] UNIT Calibration and adjustment CDATE CRH CT CTEXT FCRH LI Setting the calibration date Relative humidity calibration Temperature calibration Giving the text to calibration information field Relative humidity calibration after sensor change Reverting the factory calibration Setting the output format of SEND and R commands Entering the date Setting the time Adding date to R and SEND outputs Adding time to output to SEND and R outputs Selecting the metric or non-metric output units Starting the continuous outputting Stopping the continuous outputting Setting the continuous output interval Outputting the reading once Setting the serial interface Serial line settings (default: 4800 E 7 1) baud: 300. . . 19200 Setting the address Closing the line to POLL mode Opening temporarily connection to the POLL-mode device Setting and testing the analog outputs AMODE ASEL ASCL ITEST Error states ERRS AERR Listing the error messages Changing the analog error output value Setting the analog outputs Selecting the parameter for the analog outputs Scaling the analog outputs Testing the analog outputs Other commands ?ECHO [ON/OFF] FIND FILT RESET Outputting the information about the device Outputting the information about the device in POLL-state Turning the serial interface echo ON/OFF All devices in POLL mode send their addresses Setting the result filtering Resets the transmitter VAISALA _______________________________________________________________________ 25 USER'S GUIDE____________________________________________________________________ Measurement output R Starting the continuous outputting R 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 aw= aw= 0. 2000 aw T= 0. 2000 aw T= 25. 09 'C . . . 25. 20 'C . . . S Stopping the continuous outputting S Stops the continuous output. Also <ESC> can be used to stop outputting. INTV Setting the continuous outputting interval for the RUN mode INTV xxx yyy xxx= yyy= Example: >intv 1 Output interval: 1 S >intv 1 min Output interval: 1 MIN >intv 1 h Output interval: 1 H output interval (0. . . 255) unit (s, min or h) 26 __________________________________________________________________ M210474EN-B Chapter 5 ________________________________________________________________ Operation SEND Outputting the reading once In STOP mode: SEND In POLL mode: SEND aa aa = address of the transmitter when more than one transmitter is connected to a serial bus (0. . . 99) Example. >send aw= 0. 2 aw T= -47. 37 'C . . . If value is too long to fit to the allocated space or if there is an error in outputting, value is displayed with stars `*'. For example, aw=*. * aw T= 31. 0 'C The output mode can be changed with command FORM. SMODE Setting the serial interface mode SMODE x X= STOP/RUN/POLL STOP MODE: Transmitter in standby for serial commands. RUN MODE: Transmitter outputs data continuosusly. POLL MODE: Transmitter only responds to addressed commands >smode run Output mode : RUN >r 02:08:01. 03 aw= 02:08:04. 21 aw= <ESC> >smode stop Output mode 0. 2 aw T= 0. 2 aw T= -47. 13 'C . . . -47. 16 'C . . . : STOP VAISALA _______________________________________________________________________ 27 USER'S GUIDE____________________________________________________________________ SERI Serial line settings SERI b p d s b = bauds (300, 600, 1200, 2400, 4800, 9600, 19200) p = parity (n = none, e = even, o = odd) d = data bits (7 or 8) s = stop bits (1 or 2) The settings can be changed one parameter at a time or all parameters at once: >SERI O 4800 O 7 1 >SERI 600 N 8 1 600 N 8 1 changing parity only changing all parameters ADDR Setting the transmitter address for use in POLL-mode. ADDR aa aa = address (0. . . 99) Example: >addr Address >addr 1 Address :0 :1 OPEN Temporarily opens transmitter from POLL-mode to receive serial commands OPEN nn nn = address of the transmitter (0. . . 99) The OPEN command sets the bus temporarily in STOP mode so that the SMODE command can be given. Example: open 4 Device: > 4 line opened for operator commands 28 __________________________________________________________________ M210474EN-B Chapter 5 ________________________________________________________________ Operation CLOSE Set transmitter in poll-mode CLOSE 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 Example: relative humidity calibration is performed at transmitter 2 which is in POLL mode >OPEN 2 >CRH . . . >CLOSE opens the line to transmitter 2 calibration started line closed Output Formatting FORM Serial output format FORM x x = formatter string Command format can be used to change the format of the output commands `SEND' and `R'. Modifiers: x. y #t #r #n "" U5 length modifier (whole numbers and decimal places) tabulator carridge-return line feed string constant unit field and lenght >form "aw="1. 2 aw #r#n aw=0. 79 VAISALA _______________________________________________________________________ 29 USER'S GUIDE____________________________________________________________________ >form "aw="1. 2 aw U3 #t "ppm="3. 1 ppm " " U5 #t "T="3. 1 T U3 #r#n aw=0. 78 ppm= 53. 4 ppm T= 27. 3'C > >send 2000-01-01 20:56:27 N 53. 2 ppm T= 27. 2'C > 0 aw=0. 78 ppm= TIME, DATE Setting time and date TIME DATE Sets the time and date to the transmitter. TIME Current time is 04:12:39 Enter new time (hh:mm:ss) ?12:24:00 >DATE Current date is 2000-01-01 Enter new date (yyyy-mm-dd) ?2001-12-11 > NOTE NOTE Time and date are cleared to 2000-01-01 00:00:00 at reset. Only about 1% accuracy is obtained with the software clock. 30 __________________________________________________________________ M210474EN-B Chapter 5 ________________________________________________________________ Operation FTIME, FDATE Adding time and date to R and SEND outputs FTIME x FDATE x x = ON or OFF Command will enable/disable output of time and date to the serial line. >send aw= 0. 2 aw T= 31. 0 'C >ftime on Form. time : ON >send 03:47:59 aw= 0. 2 aw T= 31. 0 'C >fdate on Form. date : ON >send 2000-01-01 03:48:03 aw= 0. 2 aw T= 31. 0 'C > UNIT Selecting metric or non-metric output units UNIT x x = M or N M = metric units N = non-metric units Quantity aw T ppm* * Metric Unit °C ppm Non Metric Unit °F ppm for transformer oil only VAISALA _______________________________________________________________________ 31 USER'S GUIDE____________________________________________________________________ Setting, scaling and testing the analog outputs You can select for the two outputs current range (0. . . 20 mA/4. . . 20 mA) and output parameter (aw/ ppm*/ T). and scale the two outputs according to your needs. * for transformer oil only AMODE Setting the analog outputs (0. . . 20 mA/4. . . 20 mA) AMODE ch1 ch2 where ch1 and ch2: I0 = 0. . . 20 mA I1 = 4. . . [. . . ] The margins show the range of variation of water solubility found in mineral oils. Ppm-calculation for transformer oils Traditionally, moisture in transformer oil is measured by using ppm-units. The ppm-output shows the average mass concentration of water in oil. The moisture and temperature transmitter MMT318 and MMT317 have an option for ppm-output provided that this has been notified as placing the order of the transmitter. NOTE Silicone based oils must have the MMT318 and MMT317 with the Calculation Model With Oil Specific Coefficients. 56 __________________________________________________________________ M210474EN-B Appendix 1 _____________________________________________________________ Applications Calculation Model with Average Coefficients The calculation model of the MMT318 and MMT317 is based on the average water solubility behaviour of transformer oils. The ppm-output is calculated as follows: ppm = aw × 10 (A/(T+273. 16)+B) Where aw= water activity A, B= coefficients (average/oil specific) T= temperature (ºC) (1) Generally, measurements with MMT318 and MMT317 give accuracy better than 10 % of the reading. [. . . ]