User manual VAISALA OMT355

[. . . ] USER'S GUIDE Vaisala SPECTRACAP® Oxygen Transmitter OMT355 M210735EN-D PUBLISHED BY Vaisala Oyj P. O. Box 26 FIN-00421 Helsinki Finland Phone (int. ): Fax: +358 9 8949 1 +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. 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 . [. . . ] With this function it is possible to measure contamination of the optics. 0511-076 0511-077 84 __________________________________________________________________ M210735EN-D Chapter 5 ________________________________________________________________ Operation Show Statistical Information Command (STATS) This command displays statistical information. Syntax: STATS<cr> Example: >stats All cleared Uptime (h) Resets O2 max O2 min Tg max Tg min Ti max Ti min : 2006-01-18 13:40:04 : 140 :7 : 21. 06 : 4. 91 : 29. 71 : 23. 39 : 32. 53 : 24. 55 Show Status of Subfunctions Command (STATUS) This command displays modes and status of all sub functions. Syntax: STATUS<cr> Example: >status Sub function modes and states: *** LASER TEMPERATURE CONTROLLER (LTC) *** Mode : ON State : TEMP_OK *** OXYGEN MEASUREMENT (MEA) *** Mode : MODE2 State : PEAK_LOCKED Run Time Func. : OFF *** ANALOG OUTPUT (OUT) *** Mode : NORMAL State : NORMAL *** ERROR CONTROL (ERR) *** Mode : ON State : NO ERRORS VAISALA _______________________________________________________________________ 85 User's Guide ______________________________________________________________________ *** CUSTOMER INTERFACE (SCI2) ***: Mode : STOP *** SERVICE INTERFACE (SCI1) ***: Mode : STOP *** DISPLAY BOARD (DB) *** Mode : NORMAL State : NORMAL > Show Product Name and Software Version Command (VERS) This command prints out the device name and the software version. Syntax: VERS<cr> Example: >vers OMT300 / 1. 02 Memory Handling Save Parameters Command (SAVE) NOTE Remember to use the SAVE command whenever you make any changes to any of the parameters, otherwise the changes might be lost. Syntax: SAVE<cr> Example: >save EEPROM EEPROM EEPROM EEPROM (basic) saved successfully (op) saved successfully (op_log1) saved successfully (op_log2) saved successfully 86 __________________________________________________________________ M210735EN-D Chapter 5 ________________________________________________________________ Operation Resetting the Transmitter Reset Command (RESET) This command resets the transmitter. This command has exactly the same effect as toggling power to the transmitter. Syntax: RESET<cr> Example: >reset Reseting. . . OMT300 - Version STD 1. 02 Vaisala Oyj, 2004-2005 . . . Reset Function (Off) When the reset function Off is selected the transmitter stops all operations and performs a reset. To reset the transmitter, select function Off from the menu and press Ent. New measurement starts after the self-test is completed and the oxygen absorption line is found. 0511-106 0511-107 VAISALA _______________________________________________________________________ 87 User's Guide ______________________________________________________________________ 88 __________________________________________________________________ M210735EN-D Chapter 6 _____________________________________________ Setting Environmental Parameters CHAPTER 6 SETTING ENVIRONMENTAL PARAMETERS Environmental Parameter Compensations The oxygen measurement of OMT355 is somewhat affected by the temperature, pressure and background gas of the measuring environment. Because of these phenomena, OMT355 has built-in compensations for the temperature and pressure of the operating environment as well as for the water and CO2 content of the background gas. To achieve the most accurate measurement, the compensations should be enabled. The compensated output corresponds to "% O2" in the actual environment (T, P, humidity, and CO2). Please see Table 17 on page 155 for measurement specifications and the magnitude of the effect temperature, pressure and background gas have on the measurement result. The temperature compensation of OMT355 is based on two integrated temperature sensors. Pressure, humidity and CO2 compensations require that the values of the environmental parameters be set by the user if they are different from the factory set defaults (when using the factory defaults, the other compensations are essentially disabled). The default environmental parameters of OMT355 are: VAISALA _______________________________________________________________________ 89 User's Guide ______________________________________________________________________ - Pressure 1013. 25 hPa Water content 0 g/m3H2O Relative carbon dioxide concentration 0 vol-% CO2 Operating Temperature The device measures both its internal temperature and the temperature of the process gas and these are used to compensate the oxygen measurement reading. Uncompensated, the error caused by the temperature dependency is of "percentage of reading"-type. The accuracy of the temperature measurement probe measuring the process gas temperature is somewhat affected by the heat conducted by the transmitter electronics housing when there is a significant temperature difference between the process and the location of the transmitter housing. In these kind of conditions, the reading of the temperature probe that is used in the compensation is not an entirely accurate representation of the process gas temperature. For more information on this phenomenon, see Selecting Location on page 25. Operating Pressure Due to the measurement algorithm used in the transmitter, the pressure dependency of the measurement is small. This is characteristic of the measurement principle based on the TDLAS method. [. . . ] Syntax: ERR<cr> Example: >err *** ERROR CONTROL (ERR) *** Mode : ON State : WARNING ERRORS: WARNING : WATCHDOG RESET OCCURRED > VAISALA ______________________________________________________________________ 149 User's Guide ______________________________________________________________________ Show Error Log (ERRL) This command displays the events in the error log. Syntax: ERRL<cr> Example: >errl T(h)T(ms)EventError 3043991ACT NO MEASUREMENT RESULTS 30461191ACT LASER TEMPERATURE NOT REACHED 30478691DEACTLASER TEMPERATURE NOT REACHED 30499091DEACTDEACTNO MEASUREMENT RESULTS > Show Detected Errors (ERRS) This command displays all errors currently active in the device. Syntax: ERRS<cr> Example: >errs ERROR: LOW SIGNAL ERROR: FP SLOPE FAILURE > Show Error Table (ERRT) This command displays the error table. Syntax: ERRT<cr> Example: >errt # :St :Cnt 1:OFF: 2:OFF: . . . [. . . ]