USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Module HMM213 U339EN-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............................................................................ 9 About This Manual ................................................................... 9 Contents of This Manual ....................................................... 9 Version Information ............................................................. 10 Related Manuals ................................
USER'S GUIDE____________________________________________________________________ SMODE Setting the Serial Interface....................................25 OPEN & CLOSE..................................................................25 Setting the Output Format .....................................................26 MCR Setting the Carriage Return On/Off............................26 MDEC Selecting a Decimal Separator ................................26 MFLD Selecting a Field Separator .......................
________________________________________________________________________________ CHAPTER 10 TECHNICAL DATA ...................................................................................... 49 Specifications ......................................................................... 49 Options ....................................................................................
USER'S GUIDE____________________________________________________________________ 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....18 Electrical Connections ..............................................................19 Dimensions in mm (inches) ......................................................20 Calibration Connector for the HM70 or HMI41 .........................
________________________________________________________________________________ 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 Table 12 Table 13 Manual Revisions ..................................................................... 10 Related Manuals ...................................................................... 10 Emission Tests ......................................................................... 12 Immunity Tests ...................
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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 HMM213. 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 U339EN-1.2 U339EN-1.3 Manual Revisions Description October 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 HMM213 is protected by the following patents and patent applications and their corresponding national rights: Finnish patents 98861 and 99164, French patents 6650303 and 9504397, German patents 69418174 and 19513274, Japanese patents 3585973 and 2801156, UK patent 0665303, and US patent 5607564.
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 Vaisala HUMICAP® Humidity and Temperature Module HMM213. Introduction to HMM213 The HMM213 modules are designed especially for relative humidity measurements in environmental chamber applications with high temperature and humidity levels. They also measure temperature and calculate the dewpoint temperature.
USER'S GUIDE____________________________________________________________________ The HMM213 modules are connected to process control systems with screw terminals. These versatile modules incorporate the HUMICAP®180R humidity sensor, which uses an operating principle based on changes in the capacitance of a thin polymer film as it absorbs water molecules. The HMM213 modules measure temperature with the reliable Pt 100 sensor.
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____________________________________________________________________ 10 9 8 dRH (%RH) 7 6 5 4 3 2 1 0 -40 -20 0 20 40 60 80 100 Temperature (°C) Figure 1 NOTE Measurement Error at 100 %RH when the Temperature Difference between the Ambient Air and the Sensor is 1 °C With a dewpoint module, the temperature equilibrium is not a problem as the temperature of the sensor head changes continuously and the sensor head has a fast humidity response.
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 HMM213 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 head.
USER'S GUIDE____________________________________________________________________ Dimensions 1 (0. 4) 2 1.0 6( 2) ~6 5 Figure 3 (2 . 56 ) Dimensions in mm (inches) Serial Bus Settings The serial communication parameters set at factory are: Parameter Baud Parity Data bits Stop bits Value 1200 None 8 1 20 ____________________________________________________________________ U339EN-1.
Chapter 5 __________________________________________________________ Serial Commands CHAPTER 5 SERIAL COMMANDS This chapter contains information that is needed to use the serial commands for this product. Output via the Serial Bus R Starting the Measurement Output R Starts output of measurements to the peripheral devices (PC display or printer); output interval is set with command INTV. The output format depends on the transmitter configuration and parameters in use.
USER'S GUIDE____________________________________________________________________ SEND Outputting a Reading Once SEND in STOP state or SEND aa in POLL state aa = address of the transmitter when more than one transmitter is connected to a serial bus (0 ... 99; set with command ADDR) Outputs the current measurement readings via the serial line. The output format depends on which parameters the transmitter can output. Output types are: "RH 32.25 %RH T 25.74 'C ", "Td 7.
Chapter 5 __________________________________________________________ Serial Commands SERI Serial Bus Settings SERI b p d s b= bauds (150, 300, 600, 1200*, 2400, 4800) p= parity (n = none*, e = even, o = odd) d= data bits (7 or 8*) s= stop bits (1* or 2) * factory setting Giving the plain command outputs the current settings: >SERI Communication parameters > : 1200 N 8 1 Example of changing the serial bus settings: >seri 1200 e 7 1 Communication parameters : 1200 E 7 1 Set terminal settings acco
USER'S GUIDE____________________________________________________________________ UNIT Selecting the Output Units UNIT x x= m(etric units) or n(on-metric units) Table 5 Output Units Metric Units %RH C C RH T Td Non-Metric Units %RH F F For example, the command for setting the non-metric units is: >UNIT N Unit > : non metric When the command is given with no parameters, the transmitter outputs the currently valid setting. VERS Displaying Software Version VERS >VERS HMM213 > 1.
Chapter 5 __________________________________________________________ Serial Commands Operating via the Serial Bus SMODE Setting the Serial Interface SMODE xxxx xxxx = In STOP mode: In RUN mode: In POLL mode: STOP, RUN or POLL measurements output only by command, all commands can be used outputting automatically, only command S can be used measurements output only with command SEND.
USER'S GUIDE____________________________________________________________________ When more than one transmitter is connected to the same serial bus, the POLL mode makes it possible to communicate with the transmitters. For example, a relative humidity calibration is performed at transmitter 2 ( = ASCII 7): >OPEN 2 'HMM nn line opened for operator commands' >CRH ...
Chapter 5 __________________________________________________________ Serial Commands MFLD Selecting a Field Separator MFLD x x= a character, TAB, SP, CR, LF >MFLD SP fld. separator >R RH 60.53 %RH T 23.89 'C RH 60.52 %RH T 23.89 'C ... >MFLD TAB fld. separator >R RH 60.58 %RH RH 60.57 %RH ... : SP : TAB T 23.89 'C T 23.89 'C MLF Setting the Line Feed On/Off MLF x x= ON/OFF >MLF OFF Msg. lf >R >RH 60.78 %RH >MLF ON Msg. lf >R RH 60.85 %RH RH 60.80 %RH ... : OFF T 23.
USER'S GUIDE____________________________________________________________________ MSPC Setting Spaces On/Off MSPC x x= ON/OFF MSPC sets on/off the outputting of a space before and after the values of the message. >MSPC OFF Msg. space >R RH57.52%RH RH57.50%RH RH57.44%RH >MSPC ON Msg. space >R RH 57.55 %RH RH 57.55 %RH RH 57.48 %RH > : OFF T73.81'F T73.77'F T73.76'F : ON T 73.78 'F T 73.78 'F T 73.82 'F MSYMB Setting Variable Symbols On/Off MSYMB x x= ON/OFF >MSYMB ON Msg. symbol >R RH 60.86 %RH RH 60.
Chapter 5 __________________________________________________________ Serial Commands MUNIT Setting Variable Units On/Off MUNIT x x= ON/OFF >MUNIT ON Msg. unit >R RH 61.01 %RH RH 60.99 %RH ... >MUNIT OFF Msg. unit >R RH 60.97 RH 60.98 ... > : ON T 23.85 'C T 23.85 'C : OFF T 23.84 T 23.
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Chapter 6 _______________________________________________________________ Calibration CHAPTER 6 CALIBRATION This chapter contains information that is needed to calibrate this product. Vaisala recommends a recalibration of the HMM213 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____________________________________________________________________ Humidity Calibration A one-point calibration can be done against an accurate transfer standard in the field and a two-point calibration using saturated salt solutions in controlled conditions (HMK15). You can also send the instrument to Vaisala or a Vaisala representative for recalibration.
Chapter 6 _______________________________________________________________ Calibration 6. 7. Insert the probe into the measurement hole of the NaCl chamber. Wait for 20 to 40 minutes. Check the temperature and read the closest corresponding RH value in the calibration table. Give the value and acknowledge it with enter. RH > 8. : 76.00 Ref2 ? 75.5 Check again the reading at the first point and repeat the procedure if necessary. One Point Calibration CRH xx.xx yy.yy xx.xx = yy.
USER'S GUIDE____________________________________________________________________ With the Hand-Held Humidity and Temperature Meter HM70 or HMI41 Indicator and Calibration Cable The HMM213 module can be calibrated with the Hand-Held Humidity and Temperature Meter HM70 or HMI41 indicator and an appropriate calibration cable (for HM70: 27159ZZ; for HMI41: 19164ZZ). Connect the cable to the test connector of the HMM213 module and insert the jumper as indicated in Figure 4 below.
Chapter 6 _______________________________________________________________ Calibration NOTE When the connection is being established, the message 'CON ERROR' blinks on the HMI41 display for a couple of times after which measurement readings appear. This is quite normal and requires no action; however, if the message is not replaced by measurement readings, it is an indication of an operation error.
USER'S GUIDE____________________________________________________________________ Calibration Table Table 6 Greenspan's Calibration Table with Output Values According to the Chosen Scale Temperature °C °F LiCl %RH NaCl %RH *) 15 59 *) 75.6 20 68 11.3 75.5 25 77 11.3 75.3 30 86 11.3 75.1 35 95 11.3 74.9 If the LiCl solution is used or stored in temperatures below +18 °C (+64 °F), the equilibrium humidity of the salt solution may change permanently.
Chapter 6 _______________________________________________________________ Calibration If the stabilization of the sensor to the temperature of the reference needs to be monitored, the measurement output can be repeated with at Ref1 and Ref2: >CTA T : 23.19 Ref1 ? T : 23.20 Ref1 ? . . . T : 23.22 Ref1 ? 23.3 Press any key when ready ... T : 101.42 Ref2 ? 101 One Point Calibration CT xx.xx yy.yy xx.xx = current temperature yy.
USER'S GUIDE____________________________________________________________________ >CT -70 0 101 -0.5 > Use an accurate and calibrated reference only. CT Temperature Calibration of the Additional Sensor Head Two Point Calibration CTA Using this command the transmitters can be calibrated against an accurate reference, such as a Pt 100 simulator. A two-point calibration is performed as follows: >CTA T : 23.19 Ref1 ? 23.3 Press any key when ready ... T : 101.
Chapter 6 _______________________________________________________________ Calibration One Point Calibration CTA xx.xx yy.yy xx.xx = current temperature yy.yy = offset correction Example of performing the offset calibration in one reference temperature: >CTA 21.2 2.3 > Use an accurate and calibrated reference only. Gain Calibration CTA xx 0 yy.yy zz.zz xx = temperature in which there is no changes in offset yy.yy = current temperature zz.
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Chapter 7 ______________________________________________________Chemical Purge Option CHAPTER 7 CHEMICAL PURGE OPTION This chapter provides you with information on chemical purge. In some applications, the sensor gain may decrease gradually due to interference caused by some chemical present in the ambient air (see Figure 5 below). The sensor polymer absorbs the interfering chemical; this reduces its water absorption ability and so decreases the sensor gain.
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Chapter 8 ______________________________________________________________ Maintenance CHAPTER 8 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 9 ___________________________________________________________ Troubleshooting CHAPTER 9 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 13. Contact a Vaisala Service Center or a local Vaisala representative. The latest contact information and instructions are available from www.vaisala.com.
Chapter 9 ___________________________________________________________ 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 10 ___________________________________________________________ Technical Data CHAPTER 10 TECHNICAL DATA This chapter provides the technical data of the product.
USER'S GUIDE____________________________________________________________________ Table 9 General Specifications Property Operating temperature range Probe Electronics Storage temperature range (electronics) Sensor protection: Standard Connections Table 10 -70 … +180 °C -5 … +55 °C -40 … +70 °C Stainless steel sintered filter Screw terminals for 0.5 ... 1.
Chapter 10 ___________________________________________________________ Technical Data Table 12 Cable Lengths for Sensor Heads Sensor Head Humidity sensor head Optional T sensor head/ module with two sensor heads Table 13 Cable Length 65, 150, 300 cm 150 or 300 cm Chemical Purge Module RH and T module Dewpoint module RH and T module with two sensor heads Automatic Chemical Purge at Startup Yes Yes Yes VAISALA _______________________________________________________________________ 51
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