User manual VAISALA HMT100

[. . . ] USER'S GUIDE Vaisala HUMICAP Humidity and Temperature Transmitter Series HMT100 ® M210701EN-D 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. [. . . ] Replace the probe cover and screw it tightly back in place. Replace the O-ring and the probe cap. Figure 11 Removing the Humidity Probe (Fixed Probe Model) The following numbers refer to Figure 11 above: 1 2 3 4 = = = = Probe cap Probe cover O-ring HMP100 probe 26 __________________________________________________________________ M210701EN-D Chapter 4 ______________________________________________________________ Maintenance Remote Probe Model 1. Unscrew the small sleeve that secures the probe in place at the end of the probe cable and pull out the probe. Replace the probe and screw the small sleeve back on, securing the probe tightly in place. 1 2 3 0506-006 Figure 12 Removing the Humidity Probe (Remote Probe Model) The following numbers refer to Figure 12 above: 1 2 3 = = = Probe cable Sleeve securing the probe to the cable HMP100 probe VAISALA _______________________________________________________________________ 27 User's Guide ______________________________________________________________________ Calibration and Adjustment Calibrate and adjust the HMT100 using the push-buttons on the motherboard or with portable humidity meters HM70 or HMI41. A calibrator kit is needed for calibration against saturated salt solutions. The HMK15 Humidity Calibrator and pre-measured certified salts are available from Vaisala. For further information, please contact your Vaisala representative. Vaisala Service Centers also offer accredited calibrations for humidity and temperature. It is also possible to remove the HMP100 probe and replace it with a new one. The old probe can be adjusted using another HMT100 transmitter body, if you have one available. NOTE RH Field Calibration and Adjustment, as instructed in the following pages, is restricted to a certain adjustment range to minimize the effects of special circumstances, such as chemical contamination. In case the probe is outside its adjustment/trim range due to, for example, chemical exposure, the calibration cannot be completed. In this case, it is recommended that you change the probe or contact Vaisala Services. Relative Humidity Adjustment Using Push Buttons 0505-182 Figure 13 Adjustment Buttons A simple push-button adjustment is carried out using two relative humidity references: 11. 3 % RH (LiCl) and 75. 5 % RH (NaCl). To carry out the adjustment, follow these instructions: 1. Open the transmitter cover. 28 __________________________________________________________________ M210701EN-D Chapter 4 ______________________________________________________________ Maintenance 3. 10. 11. Press the ADJ button on the transmitter motherboard. Insert the probe into the measurement hole of the LiCl salt chamber. The indicator LED blinks evenly, indicating that the measurement is changing. Wait for 30 minutes or until the indicator LED stops blinking and is lit continuously, which means that the measurement has stabilized. Press the LiCl 11 % button to adjust the 11 % RH condition. The transmitter returns to the normal operation mode, and the indicator LED turns off. To start calibrating the 75 % RH condition, press the ADJ button on the transmitter motherboard again. Insert the probe into the measurement hole of the NaCl salt chamber. [. . . ] 1 V, pressing the 75 % adjustment button will set the voltage output at 0. 5 V for about 30 seconds. 40 __________________________________________________________________ M210701EN-D Chapter 5 ___________________________________________________________ Troubleshooting CHAPTER 5 TROUBLESHOOTING This chapter describes error messages and provides contact information for Technical Support and Vaisala Service Centers. Error Mode Current Output In error mode the analog outputs switch to IOUT = 23 mA. Error mode indication covers only transmitter body electronic functions. The transmitter cannot indicate a faulty RH probe. Voltage Output Voltage output version has no error mode indication. Technical Support For technical questions, contact the Vaisala technical support: E-mail Fax helpdesk@vaisala. com +358 9 8949 2790 VAISALA _______________________________________________________________________ 41 User's Guide ______________________________________________________________________ Return Instructions If the product needs repair, please follow the instructions below to speed up the process and to avoid extra costs to you. Contact a Vaisala Service Center or a local Vaisala representative. [. . . ]