User manual VAISALA VLOG 4.4

[. . . ] Veriteq > > > > > vLog 4. 4 User's Guide w w w. veriteq. com w w w. vaisala. com Copyright Copyright © 2010 Veriteq Instruments, Inc. No copying, distribution, publication, modification, or incorporation of this document, in whole or part, is permitted for commercial purposes without the express written permission of Veriteq Instruments. Veriteq, a Vaisala company 13775 Commerce Parkway Richmond, BC V6V 2V4 Canada Trademarks Veriteq Instruments, Veriteq, Veriteq vLog and Veriteq Spectrum are trademarks of Veriteq Instruments. All other trademarks referred to are the property of their respective owners. Disclaimer and Limitation of Liability Veriteq Instruments, Inc. [. . . ] Public access: If the logger location is too visible, people may interfere with the readings. Make sure it is not too accessible. Using External Temperature Probes Veriteq (VL- and SP-) 1000, 1016, 1400, 1416, and 1700-series data loggers have external temperature channel(s) for use with an external temperature probe. Using the external temperature probe enables you to collect data from hard-to-get-at locations, such as in duct work or under pipe insulation. You can use an external temperature probe with these data loggers, provided the probe was calibrated with the data logger. To use an external temperature probe: 1. Enable the desired channel on the logger (see Enabling and Disabling Logger Channels on page 35). If you do not need to monitor from the internal temperature sensor, disable it to conserve memory. Note: You can disable most unused channels - external probe or not - to save data logger memory. One exception is the internal temperature channel on VL-1700 and SP-1700 data loggers. 43 Getting Started 2. Attach the temperature probe to the connector on the data logger. 3. Use the Logger>Setup window to test the data logger operation (refresh the readings as required). Place the logger in the desired location and start recording. Caring for Relative Humidity Sensors Each Veriteq VL-2000 data logger has a relative humidity sensor. Although the sensor has been designed to resist contamination and condensation, avoid exposing the data logger to contaminants, if possible. For information on specific environments, contact Veriteq Instruments. 44 4 Transferring Logger Files Transferring Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 45 Transferring Logger Files Transferring Data When you transfer data from a data logger's memory, vLog creates a copy of the data and stores it on your PC as a logger file. Logger transfers can be performed either individually (logger by logger) or in a batch (by selecting a range of COM ports). Data from secure loggers (VL loggers) will be stored in secure logger files. Data from non-secure loggers (SP loggers) will be stored in non-secure files. Though all files will have the . spl extension, files from SP loggers are non-secure and can be opened in Veriteq Spectrum. After inserting a logger file into vLog, you can view the information as a graph or as a tabular report. VL Loggers Only: During the data transfer process, vLog generates a Logger File Creation Report and a unique Logger File ID Number. The Logger File ID Number also appears in the Logger file and on the Graph file and provides a convenient way to track the data from the data logger to the final Graph file. Though it is not recommended, it is possible to track and verify the data by configuring vLog to ask you for a username and password when transferring data. [. . . ] The communications port to which you can attach devices such as a modem, mouse, or serial printer to the computer. The serial communication ports on the computer are commonly referred to as COM1, COM2, COM3, and so on. The ability of a sensor or measurement instrument to maintain its performance characteristics over a specified period of time A temperature-sensing element (a thermally-sensitive resistor) composed of sintered semiconductor material that exhibits a large change in resistance in proportion to a small change in temperature. The relationship between temperature and resistance is approximated for most thermistors by the Steinhart-Hart equation. [. . . ]