User manual VAISALA HMP42

[. . . ] OPERATING MANUAL HMI41 Indicator and HMP42 Probe U323en-1. 1 © Vaisala Oy 1998 No part of this document 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 a prior written notice of the copyright holder. The instruction manuals may be changed without prior notice. Yleisjäljennös 3/1998 U323en-1. 1 HMI41 AND HMP42 Operating Manual Contents 1. THE HMI41 INDICATOR AND PROBES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TO BE NOTED IN THE MEASUREMENT OF HUMIDITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In setup mode, press ENTER repeatedly until the following is displayed: set Then press MODE five times, and the following appears: T set Press ENTER to activate the two point temperature calibration mode. A message similar to the following appears with the first line blinking: T set °C Lo The blinking number indicates the value of the lower temperature reference stored in the HMI41 memory. Check the reference temperature and change the display with buttons and to correspond to the accurate value, for example: 22 U323en-1. 1 HMI41 AND HMP42 Operating Manual T set °C Lo Press ENTER and the HMI41 shows the value that the probe is currently measuring, displaying a message similar to the following: T °C Lo Wait at least ten minutes for the reading to stabilize and press ENTER to acknowledge the value. A message similar to the following appears with the first line blinking: T set °C Hi The blinking number indicates the value of the higher temperature reference stored in the HMI41 memory. Check the reference temperature and change the display with buttons and to correspond to the accurate value, for example: T set °C Hi Press ENTER and the HMI41 shows the value that the probe is currently measuring, displaying a message similar to the following: T °C Hi Wait at least ten minutes for the reading to stabilize and press ENTER to acknowledge the value. If the calibration has been successful, the following message appears: 23 HMI41 AND HMP42 Operating Manual U323en-1. 1 The correction data has now been calculated and stored in the HMI41 memory. The HMI41 returns automatically to the selection of the display units, and can be turned off. When the indicator is used as a standard indicator and the correction data differs from the factory settings, an arrow in the upper righthand corner is displayed: RH T % °C If the message "cal pass" does not appear (instead, some other text may appear, e. g. "too close", "err offst" or "err gain"), the correction has not been stored in the memory. The error may be due to an incorrect reference value or to measured values that are out of the range. 24 U323en-1. 1 HMI41 AND HMP42 Operating Manual 6. HMI41 AND DATA COLLECTING The HMI41 indicator can also be used for collecting the measurement data. The data is stored in the indicator's non-volatile memory which means that it is not lost when the indicator is turned off. Please, note also that the automatic power-off function is not active during data collecting even if previously selected (see Chapter 8. 3). When the data collecting has ended, the automatic power-off function becomes active again. 6. 1 Entering the data collecting mode To enter the data collecting mode, turn the indicator on with the ON/OFF button and the following appears for a couple of seconds: RH Td T P set min max % °C °F °C °F g/m hPa hyst hold Lo bat Hi Release the ON/OFF button and press immediately the button HOLD. The software version and the probe type indication appear, after which the display changes automatically to show the battery charge: bat Hi Within a couple of seconds the text the HOLD button. REC AUTO appears on the display; release This is the main display of the data collecting mode. With the button MODE you can enter the REC CATCH mode (manual data collecting, see Chapter 6. 2) and by pressing MODE again, the REC READ mode (reading the measurement results, see Chapter 6. 5). By pressing ENTER, you can set the measurement duration and by pressing ENTER again, the measurement interval (Chapters 6. 3 and 6. 4). By pressing HOLD, you can always return to the previous display. 25 HMI41 AND HMP42 Operating Manual U323en-1. 1 6. 2 Manual data collecting For manual data collecting, press the button MODE and the following appears: Press ENTER and a text similar to the following appears: RH T set % °C The probe is now taking measurements and you can store the readings at appropriate intervals by pressing the button HOLD. The sequence number of the reading in the indicator memory appears for a couple of seconds: The indicator returns automatically to show the readings. You can store 199 measurement readings in the indicator memory (numbers 1 - 199). The readings can be read in the REC READ mode (see Chapter 6. 5). 26 U323en-1. 1 HMI41 AND HMP42 Operating Manual 6. 3 Setting the measurement duration Turn the indicator on with the ON/OFF button, press immediately the button HOLD and keep it pressed until the text REC AUTO appears on the display. Press ENTER and a text similar to the following on the display: bat (previously set duration) In this mode, you can set the time between the first and the last measurement stored, e. g. When entering this mode, previously set duration time appears on the display. [. . . ] In this example, the maximum value of the second line reading is being observed (MAX = maximum, LO = the 2nd line reading); press ENTER to see the T reading with decimals. RH T max % °C Hi RH T min % °C Lo RH T max % °C Lo 62 U323en-1. 1 HMI41 AND HMP42 Operating Manual 4. TRANSFERRING THE MEASURED DATA TO A PC Give the communication parameters when using this terminal session for the first time; save them for future use. Table 4. 1 Giving parameters in Windows 3. 1 MENU DESCRIPTION PROGRAM MANAGER ò ACCESSORIES ò TERMINAL ò Settings ò Communications ò File ò Save as double click double click click click and select parameters (see list below); click OK move the cursor to: click click and save settings: type the name of the file (e. g. HMI41) and click OK Turn the HMI41 on and follow the instructions in Ch. 4. 2 The communication parameters are: · connector · baud rate · data bits · stop bits · parity · flow control according to your computer 4800 7 1 even none 63 HMI41 AND HMP42 Operating Manual U323en-1. 1 Table 4. 2 Giving parameters in Windows 95 and Windows NT WINDOWS 95 MENU WHAT TO DO WINDOWS NT MENU WHAT TO DO Start ò Programs ò Accessories ò HyperTerminal ò Hypertrm ò Connection Description move the cursor to: move the cursor to: move the cursor to: click move the cursor to: double click type the name of the connection (e. g. [. . . ]