User manual VAISALA HM70

[. . . ] USER'S GUIDE Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM70 M210297EN-E 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 2007 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Connect the end of the HMA6070 (connection cable for HM60/70-series) or HMA2030 (connection cable for HM20/30series) cable to either of the HM70's connector port located on the bottom of the indicator, see Figure 7 on page 40. Connect the other end of the HMA6070 or HM20/30/130-cable to the RH TEST connector (or TEST connector) of the transmitter's motherboard. This concerns ONLY calibration of HM60/70-series: If a transmitter has voltage output, select the RH input scale setting 0. . . If a transmitter has current output, set the indicator's default setting to correspond the transmitter's signal (0. . . 4. - 40 __________________________________________________________________ M210297EN-E Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters - - - - 5. Select Settings, press Select Measurement settings, press Select RH scale: 4. . . 20 mA or 0. . . 20 mA, press ON To return to the basic display, press EXIT Now the reading of the transmitter is shown on the first or middle row of the display, depending on the connector port to which the calibration cable is connected. Value of the port I is shown on the upper row of the display and the value of the port II on the lower row of the display. Difference of the readings is shown in the lowest row. 6. Ensure that the probes are located in the same conditions. You can have an optional probe holder for the HMP76 probe to attach the probe next to the probe of HMD60/70 or HMD20/30 (order code for the probe holder: HM36915). If the difference between the humidity readings is less than 2 % RH, there is no immediate need for adjustment. Adjust the transmitters reading to correspond the HM70 reference probe by turning the small screw on the modules on the transmitter's mother board marked with RH offset/ RH gain. If the RH reading is < 65 %, turn the RH offset screw and if the RH reading is >65 %, turn the RH gain screw. Turning to the clockwise direction increases the reading, turning to opposite direction decreases the reading. Do not breathe towards the transmitter probes when adjusting the reading. 7. 8. 9. 10. When the transmitter reading is equal with the HM70 reference probe's reading, adjustment is done. Switch off HM70 and detach the cable from the transmitter and the HM70 indicator. VAISALA _______________________________________________________________________ 41 User's Guide ______________________________________________________________________ Calibration and Adjustment of HMT100 Series Transmitters You can check and adjust the HMT100 relative humidity measurement with Vaisala HM70 Hand-Held Humidity and Temperature meter. There are four types of adjustments available: field checking and adjustment using a calibrated reference probe, one-point adjustment using a calibrator, two-point adjustment using a calibrator and LiClNaCl adjustment. Follow the 7 first steps and continue according to the chosen adjustment method: 1. Connect the 211339 HM70-connection cable to the SERVICE PORT connector on the HMT100 motherboard. Connect the other end of the connection cable to either of the HM70's connector ports located on the bottom of the indicator. The reading of the transmitter is shown on the top or middle row of the indicator display, depending on which connector port the connection cable is connected to. Press the ADJ button on the HMT100 motherboard to open the adjustment mode. Continue according to the directions of the desired adjustment method. 5. 6. [. . . ] Addresses of the Service Centers are provided in section Vaisala Service Centers on page 70. Please have the following information on hand: - serial number of the unit - date and place of purchase or last calibration - description of the fault - circumstances in which the fault occurs/occurred - name and contact information of a technically competent person who can provide further information on the problem 3. Pack the faulty product in a strong box of adequate size, with proper cushioning material to avoid damage. Include the information specified in step 2 in the box with the faulty product. [. . . ]