User manual VAISALA DMT152

[. . . ] USER'S GUIDE Vaisala DRYCAP® Dewpoint Transmitter DMT152 M210865EN-D 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] After the driver has been installed, connect the USB cable to a USB port on your PC. Verify the port number, and the status of the cable, using the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu. 4. 5. Windows will recognize each individual cable as a different device, and reserve a new COM port. Remember to use the correct port in the settings of your terminal program. However, if you wish to remove the driver files and all Vaisala USB cable devices, you can do so by uninstalling the entry for Vaisala USB Instrument Driver from the Add or Remove Programs (Programs and Features in Windows Vista) in the Windows Control Panel. Terminal Application Settings The default settings of the DMT152 serial interface are presented in Table 4. If the settings of your DMT152 have been changed and you do not know what they are, refer to section Unknown Serial Settings on page 60. Table 4 Property Baud rate Parity Data bits Stop bits Flow control DMT152 Default Serial Interface Setting Description / Value 19200 None 8 1 Xon/Xoff (none) The steps below describe how to connect to the DMT152 using the PuTTY terminal application for Windows (available for download at www. vaisala. com) and a USB serial interface cable: 30 __________________________________________________________________ M210865EN-D Chapter 5 ________________________________________________________________ Operation 1. 3. Connect the USB serial interface cable between your PC and the RS-485 port of the DMT152 (port II). Select the Serial settings category, and check that the correct COM port is selected in the Serial line to connect to field. Note: You can check which port the USB cable is using with the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu. 4. Check that the other serial settings are correct for your connection, and change if necessary. Flow control should be set to None unless you have a reason to change it. Click the Open button to open the connection window and start using the serial line. Note: If PuTTY is unable to open the serial port you selected, it will show you an error message instead. If this happens, restart PuTTY and check the settings. 5. 6. You may need to adjust the Local echo setting in the Terminal category to see what you are typing on the serial line. To access the configuration screen while a session is running, click the right mouse button over the session window, and select Change Settings. . . from the pop-up menu. 0807-004 Figure 16 PuTTY Terminal Application VAISALA _______________________________________________________________________ 31 User's Guide ______________________________________________________________________ List of Serial Commands All commands can be issued either in uppercase or lowercase. The notation <cr> refers to pressing the carriage return (Enter) key on your computer keyboard. Enter a <cr> to clear the command buffer before starting to enter commands. NOTE The DMT152 does not output the ">" prompt that is used in the output examples of this manual. The prompt has been added for clarity of the examples. Table 5 DMT152 Serial Commands Description Show device information Show device information (overrides poll mode) Calibrate analog channel Set the transmitter address for POLL mode Set analog output device malfunction error mode Set analog output limit alarm modes Set analog output mode Allow analog outputs to exceed their range 10% Configure analog output quantities and scaling Test analog outputs Close the temporary connection and return the device to POLL mode Display the currently active errors Change the format of the measurement output Restore factory settings Display the command list Set the continuous output interval (for RUN mode and R command) Set the molar mass of the process gas (used in ppmw calculation) Open temporary connection to a device that is in POLL mode Set value for pressure compensation Start the continuous outputting Reset the transmitter Stop the continuous outputting Set response sending delay in milliseconds Output the reading once Set the serial interface settings Set the serial interface mode Display transmitter status Set analog output self-diagnostic alarm Set time for transmitter clock Command ?99] AERR ALARM AMODE AOVER [ON/OFF] ASEL ATEST CLOSE ERRS FORM FRESTORE HELP INTV [0 . . . 99] SERI SMODE [RUN/POLL/STOP] STAT STATUS TIME 32 __________________________________________________________________ M210865EN-D Chapter 5 ________________________________________________________________ Operation Command UNIT VERS XPRES XPUR [ON/OFF] Description Select metric or non-metric units Display transmitter software version Set value for pressure compensation (temporarily, is cleared at reset) Enable or disable sensor purge (temporarily, is enabled at reset) Device Information and Status Show Device Information The ?DMT152/1. 10 Serial number : Batch number : Module number : Sensor number : Cal. info : Serial mode : Baud P D S : Output interval: Address : Pressure : Filter : Ch1 output : Ch2 output : Ch1 Tdf lo : Ch1 Tdf hi : Ch2 Tdf lo : Ch2 Tdf hi : D1930026 D1330070 ???????? [. . . ] Supplied operating voltage is too low for reliable operation of the analog current output. Note: It is normal to receive this error when using the MI70 indicator or the USB serial interface cable, as they do not provide a sufficient operating voltage to operate the current output. Internal error Internal error Internal error Internal error Internal error Voltage too low error Voltage too low for mA output error Ambient temperature error Flash check sum error Param check sum error INFOA check sum error SCOEFS check sum error CURRENT check sum error VAISALA _______________________________________________________________________ 59 User's Guide ______________________________________________________________________ Unknown Serial Settings If you are not sure what the serial settings of your transmitter are, follow the steps below to view and change them. Connect to the serial line using the error state serial line settings 19200 8 N 1. [. . . ]