User manual VAISALA MMT162

[. . . ] USER'S GUIDE Vaisala HUMICAP Moisture and Temperature Transmitter for Oil MMT162 ® M210934EN-B PUBLISHED BY Vaisala Oyj P. O. Box 26 FI-00421 Helsinki Finland Phone (int. ): +358 9 8949 1 Fax: +358 9 8949 2227 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. [. . . ] 4. Table 4 Property Baud rate Parity Data bits Stop bits NOTE In case the transmitter starts up in an error state, the serial interface settings are automatically returned to the default settings given in Table 4 above. VAISALA _______________________________________________________________________ 23 User's Guide ______________________________________________________________________ Installing the Driver for the USB Cable Before taking the USB cable into use, you must install the provided USB driver on your PC. When installing the driver, you must acknowledge any security prompts that may appear. The driver is compatible with Windows® 2000, Windows® XP, Windows Server® 2003, and Windows® Vista. Check that the USB cable is not connected. Disconnect the cable if you have already connected it. Insert the media that came with the cable, or download the driver from www. vaisala. com. Execute the USB driver installation program (setup. exe), and accept the installation defaults. The installation of the driver may take several minutes. After the driver has been installed, connect the USB cable to a USB port on your PC. Windows will detect the new device, and use the driver automatically. The installation has reserved a COM port for the cable. 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. If you are using the Vaisala MI70 Link application, you do not need to check the COM port, as the MI70 Link detects the USB connection automatically. There is no reason to uninstall the driver for normal use. 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. 24 __________________________________________________________________ M210934EN-B Chapter 4 ________________________________________________________________ Operation Terminal Program Settings The default settings of the MMT162 serial interface are presented in Table 4 on page 23. If the settings of your MMT162 have been changed and you do not know what they are, refer to section Restore Factory Settings on page 41. The steps below describe how to connect to the MMT162 using the PuTTY terminal application for Windows (available for download at www. vaisala. com) and a USB serial interface cable: 1. Connect the USB serial interface cable between your PC and the RS-485 port of the MMT162 (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. Check that the other serial settings are correct for your connection, and change if necessary. [. . . ] Remove the filter from the probe and insert the probe into a measurement hole of the dry end reference chamber (for example, NaCl: 75 % RH in the humidity calibrator HMK15). Wait at least 30 minutes for the sensor to stabilize. Connect the MMT162 to a PC, see section Serial Communication on page 23. Enter the CRH command and press ENTER. 2. [. . . ]