USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Module HMM212 U338EN-1.
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.
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION............................................................................ 7 About This Manual ................................................................... 7 Contents of This Manual ....................................................... 7 Version Information ............................................................... 8 Related Manuals ...............................
USER'S GUIDE____________________________________________________________________ CHAPTER 6 MAINTENANCE............................................................................................27 Replacing the HUMICAP®180R Sensor and the Filter.........27 Replacing Consumables........................................................27 Parts List for Consumables .................................................27 CHAPTER 7 TROUBLESHOOTING.....................................................................
________________________________________________________________________________ List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Measurement Error at 100 %RH when the Temperature Difference between the Ambient Air and the Sensor is 1 °C ... 16 Dimensions in mm (inches) ...................................................... 18 Electrical Connections of HMM212 Module ............................. 19 Calibration Connector for the HMI41........................................
USER'S GUIDE____________________________________________________________________ List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Manual Revisions .......................................................................8 Related Manuals.........................................................................8 Emission Tests .........................................................................10 Immunity Tests ......................................
Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the product. About This Manual This manual provides information for installing, operating, and maintaining Vaisala HUMICAP® Humidity and Temperature Module HMM212. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and the product.
USER'S GUIDE____________________________________________________________________ Version Information Table 1 Manual Code U338EN-1.1 U338EN-1.2 Manual Revisions Description June 1999 This manual, December 2009 - HUMICAP® sensor type has been changed.
Chapter 1 ________________________________________________________ General Information Feedback Vaisala Customer Documentation Team welcomes your comments and suggestions on the quality and usefulness of this publication. If you find errors or have other suggestions for improvement, please indicate the chapter, section, and page number. You can send comments to us by email: manuals@vaisala.
USER'S GUIDE____________________________________________________________________ - Always hold the boards by the edges and avoid touching the component contacts. Recycling Recycle all applicable material. Dispose of batteries and the unit according to statutory regulations. Do not dispose of with regular household refuse.
Chapter 1 ________________________________________________________ General Information Patent Notice The Vaisala HUMICAP® Humidity and Temperature Module HMM212 is protected by the following patents and patent applications and their corresponding national rights: Finnish patent 98861, French patent 6650303, German patent 69418174, Japanese patent 3585973, UK patent 0665303, and US patent 5607564. Trademarks Vaisala Trademark is a registered trademark of Vaisala Oyj.
USER'S GUIDE____________________________________________________________________ b) the allegedly defective Product or part shall, should Vaisala so require, be sent to the works of Vaisala or to such other place as Vaisala may indicate in writing, freight and insurance prepaid and properly packed and labelled, unless Vaisala agrees to inspect and repair the Product or replace it on site.
Chapter 2 __________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the features and advantages of the Vaisala HUMICAP® Humidity and Temperature Module HMM212. Introduction to HMM212 The HMM212 modules are designed especially for relative humidity measurements in environmental chamber applications with high temperature and humidity levels.
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Chapter 3 ________________________________________ To Be Noted When Measuring Humidity CHAPTER 3 TO BE NOTED WHEN MEASURING HUMIDITY This chapter describes issues that need to be noted in the measurement of humidity. In the measurement of relative humidity and especially in calibration, it is essential that the temperature equilibrium is reached. Even a slight difference in the temperature between the measured object and the sensor causes an error.
USER'S GUIDE____________________________________________________________________ 9 8 dRH (%RH) 7 6 5 4 3 2 1 0 -40 -20 0 20 40 60 80 100 Temperature (°C) Figure 1 Measurement Error at 100 %RH when the Temperature Difference between the Ambient Air and the Sensor is 1 °C 16 ____________________________________________________________________ U338EN-1.
Chapter 4 _______________________________________________________________ Installation CHAPTER 4 INSTALLATION This chapter provides you with information that is intended to help you install this product. Selecting Location Finding a suitable site for HMM212 is important for getting representative ambient measurements. Select a place that gives a true picture of the environment or process and is as clean as possible. Air should flow freely around the sensor.
USER'S GUIDE____________________________________________________________________ Dimensions Figure 2 Dimensions in mm (inches) Electrical Connections Connect wires according to Figure 3 on page 19. 18 ____________________________________________________________________ U338EN-1.
Chapter 4 _______________________________________________________________ Installation 2 3 1 Figure 3 Electrical Connections of HMM212 Module The following numbers refer to Figure 3 above: 1 = During normal use, leave the jumper as indicated here (factory setting).
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Chapter 5 _______________________________________________________________ Calibration CHAPTER 5 CALIBRATION This chapter contains information that is needed to calibrate this product. Vaisala recommends a recalibration of the HMM212 module after six months of use. After the first recalibration, the recommended calibration interval is approximately 12 months. However, please note that these intervals depend on the operating conditions and the required accuracy.
USER'S GUIDE____________________________________________________________________ 2 1 Figure 4 Calibration Connector for the HMI41 The following numbers refer to Figure 4 above: 1 = For calibration with the HMI41, insert the jumper as indicated here.
Chapter 5 _______________________________________________________________ Calibration NOTE During the calibration with HMI41, please note that temperature loop current is not within the scaling. With Pushbuttons and a Jumper You can also perform the calibration with pushbuttons and a jumper on the component board (see Figure 5 on page 24). In addition, you need a digital multimeter (DMM).
USER'S GUIDE____________________________________________________________________ 5. 6. 7. 8. 9. Connect the jumper to the RH offset pins (see Figure 5 below) and adjust the output signal with push buttons to the value given in the calibration table (Table 5 on page 25). Insert the probe into the measurement hole of the NaCl chamber. Wait for 20 to 40 minutes. Check that the reading corresponds within the desired accuracy to the reading given in the calibration table.
Chapter 5 _______________________________________________________________ Calibration Calibration Table Table 5 Temperature LiCl 4 ... 20 mA 0 ... 20 mA 0 ... 1 V 0 ... 5 V 0 ... 10 V Temperature NaCl 4 ... 20 mA 0 ... 20 mA 0 ... 1 V 0 ... 5 V 0 ... 10 V *) Greenspan's Calibration Table with Output Values According to the Chosen Scale °C °F %RH mA mA V V V 15 59 *) 20 68 11.3 5.81 2.26 0.113 0.565 1.13 25 77 11.3 5.81 2.26 0.113 0.565 1.13 30 86 11.3 5.81 2.26 0.113 0.565 1.13 35 95 11.3 5.81 2.
USER'S GUIDE____________________________________________________________________ Temperature Calibration NOTE The temperature channel of the HMM212 is very stable and the modules have been calibrated at the factory. Unless there is a strong reason to believe that the adjustments have changed, do not perform a temperature calibration. This is a very demanding procedure and requires both expertise and extremely accurate references.
Chapter 6 ______________________________________________________________ Maintenance CHAPTER 6 MAINTENANCE This chapter provides information that is needed in basic maintenance of the product. Replacing the HUMICAP®180R Sensor and the Filter Remove the damaged sensor and insert a new one. Handle the sensor by the plastic socket. Recalibrate the transmitter. CAUTION Do not touch the sensor element. Replace a dirty filter to ensure a maximum lifetime and a fast response for the sensor.
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Chapter 7 ___________________________________________________________ Troubleshooting CHAPTER 7 TROUBLESHOOTING This chapter describes common problems, their probable causes and remedies, and contact information for technical support.
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. 1. 2. Read the section Warranty on page 11. Contact a Vaisala Service Center or a local Vaisala representative. The latest contact information and instructions are available from www.vaisala.com.
Chapter 7 ___________________________________________________________ Troubleshooting Vaisala Service Centers Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services. See contact information below. Vaisala Service Centers also offer accredited calibrations, maintenance contracts, and a calibration reminder program. Do not hesitate to contact them to get further information.
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Chapter 8 ____________________________________________________________ Technical Data CHAPTER 8 TECHNICAL DATA This chapter provides the technical data of the product. Specifications Table 7 Relative Humidity Specifications Property Measurement range Accuracy (including non-linearity, hysteresis and repeatability) Response time (90%) at +20 °C in still air (with sintered filter) Typical temperature dependence of electronics Sensor Table 8 0.
USER'S GUIDE____________________________________________________________________ Table 10 General Specifications Property Operating temperature range Probe Electronics Storage temperature range (electronics) Sensor protection: Standard Connections Table 11 Description / Value -70 … +180 °C -5 … +55 °C -40 … +70 °C Stainless steel sintered filter Screw terminals for 0.5 ... 1.5 mm2 wires Power Supply Specifications Property Operating voltage Description / Value 10 ...
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