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Summary of Contents for Vaisala HMK15
- Page 1 USER'S GUIDE Vaisala Humidity Calibrator HMK15 M210185EN-C...
- Page 2 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...
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Page 3: Table Of Contents
Product Related Safety Precautions ..... 4 Recycling..............5 Warranty ..............6 CHAPTER 2 PRODUCT OVERVIEW ............7 Introduction to Vaisala Humidity Calibrator HMK15 ..............7 General..............7 Salt Package Calibration Certificates ....9 CHAPTER 3 PREPARING THE SALT SOLUTIONS........11 General Instructions.......... - Page 4 User's Guide ________________________________________________________ CHAPTER 5 MAINTENANCE ..............31 CHAPTER 6 SPARE PARTS AND ACCESSORIES........33 CHAPTER 7 TECHNICAL DATA ..............35 2 _________________________________________________________________ M210185EN-C...
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Page 5: Chapter 1 General Information
This chapter provides general notes for the manual and the product. About This Manual This manual provides information for operating, and maintaining Vaisala Humidity Calibrator HMK15. General Safety Considerations Throughout the manual, important safety considerations are highlighted as follows: Warning alerts you to a serious hazard. If you do not read... -
Page 6: Feedback
User's Guide ________________________________________________________ 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 e-mail: manuals@vaisala.com... -
Page 7: Recycling
Chapter 1 ___________________________________________ General Information Recycling Recycle all applicable material. Dispose of batteries and the unit according to statutory regulations. Do not dispose of with regular household refuse. VAISALA _____________________________________________________________________ 5... -
Page 8: Warranty
Products should Vaisala so require, be sent to the works supplied hereunder, which obligations of Vaisala or to such other place as Vaisala may liabilities are hereby expressly cancelled and indicate in writing, freight and insurance waived. Vaisala's liability... -
Page 9: Chapter 2 Product Overview
The four holes in the chamber cover are designed for Vaisala probes and transmitters with 12 mm, 13.5 mm (2 holes) and 18.5 mm diameters. The salt solutions suitable for the HMK15 calibrator are for example lithium chloride LiCl (11 %RH), magnesium chloride MgCl... - Page 10 (0 … 100 %RH). The HMK15 calibrator is suitable for both laboratory and field usage. During transportation, the chambers can be tightly closed with specially designed transit covers. The optional transit bag (order code HM27032) helps to transport the calibrator in the vertical position.
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Page 11: Salt Package Calibration Certificates
In other words, a sample of packages are taken from a batch and salts are prepared according to the instructions given in this manual. These salt solutions are then checked at Vaisala Oy's Measurement Standards Laboratory (this calibration laboratory is accredited by FINAS, a member of the European Cooperation for Accreditation of Laboratories). - Page 12 User's Guide ________________________________________________________ This page intentionally left blank. 10 _____________________________________________________M210185EN-C...
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Page 13: Preparing The Salt Solutions
The last rinse must be made with distilled or ion exchanged water. - The salts are quick and easy to prepare with Vaisala's ready-dosed salt packages. If you do not use ready-dosed salt packages, measure the salts using the measurement cup provided. -
Page 14: Preparing The Solutions
User's Guide ________________________________________________________ - At the bottom of the salt chamber there must not be more than 1 cm of undissolved salt and liquid. Otherwise, the sensor to be calibrated can be immersed into the solution. If necessary, verify the amount for example with the measurement spoon. - Page 15 Press the transit cover on a chamber holder Pour ion exchanged water into the chamber; the required amounts are given in the table: LiCl 12 ml of water MgCl2 3 ml of water NaCl 10 ml of water K2SO4 10 ml of water VAISALA _________________________________________________________13...
- Page 16 User's Guide ________________________________________________________ 0606-166 Figure 3 Pour a correct dose of ion exchanged water into the chamber; dry the measurement cup Sprinkle the contents of a salt package (or measure the salt according to the table) in small quantities into the chamber, stirring constantly.
- Page 17 When all salt has been sprinkled into the chamber, the saturated salt solution should have the ratio of 60 … 90 % undissolved salt to 10 … 40 % liquid. Close the chamber with the chamber cover (Figure 5). VAISALA _________________________________________________________15...
- Page 18 User's Guide ________________________________________________________ 0606-168 Figure 5 Close the chamber with the chamber cover Fasten the salt chamber on the holder in the base plate and close the measurement holes with rubber plugs. The chambers can also be used as individual checkers without the base plate.
- Page 19 See Chapter 5 Maintenance on page 31 on how to maintain the salt solutions. If you do not use the instrument for a longer period of time, NOTE close the chambers with transit covers. VAISALA _________________________________________________________17...
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Page 21: Instructions For The Calibration Of Humidity Instruments
More detailed instructions are given in individual manuals of transmitters and probes. Handle the probe as little as possible. Do not hold the salt chamber or other parts of the calibrator in hand during calibration as they warm up and cause errors in the readings. VAISALA _________________________________________________________19... - Page 22 User's Guide ________________________________________________________ Even the smallest water drop on the probe near the sensors NOTE distorts the readings. Make sure that chamber covers and plugs are carefully closed. 0606-170 Figure 7 Salt chamber The following numbers refer to Figure 7 above 1 = HMP233 probe 2 = O-rings 3 = Sensors...
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Page 23: Thermometer
13.5 mm hole (see Figure 8). 0606-171 Figure 8 The sleeve protects the part with capillary liquid (on the left) or acts as an adapter (on the right) VAISALA _________________________________________________________21... - Page 24 User's Guide ________________________________________________________ During calibration, the thermometer is inserted into the 13.5 mm hole of a salt chamber. Press it downwards until it passes the O-rings. The thermometer is correctly in place when you can feel a resistance while pressing it downwards. 0606-172 Figure 9 During calibration, the thermometer is...
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Page 25: Calibration
Calibration Perform the calibration according to the following instructions: - Leave the HMK15 calibrator and the probe at the calibration site for at least 30 minutes before starting the calibration in order to let the probe temperature stabilize to the room temperature. - Page 26 Two adapter fittings are attached on the base plate of the HMK15, see Figure 1 on page 8. Remember to check from the user's guide of your device if CAUTION the adapter fitting is needed.
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Page 27: Greenspan's Calibration Table
The numbers on the right in each column indicate the uncertainty of the reference humidity of the salt in that temperature. 1) Greenspan, L.: Journal of Research of the National Bureau of Standards - A Physis and Chemistry Vol. 81A, No. 1 January-February 1977, pp. 89-95 VAISALA _________________________________________________________25... -
Page 28: On-Site Calibrations And Transportation
User's Guide ________________________________________________________ On-Site Calibrations and Transportation The HMK15 calibrator is easily trasferred from one place to another. Two O-rings seal the transit cover on the chamber. The optional transit bag helps to transport the calibrator so that chambers stay in the vertical position. Furthermore, the bag can be used for housing the calibrator during calibration. -
Page 29: Vaisala
0.5 … 2 hours. If there are several frequently calibrated instruments at the same site, knowing the stabilization times is useful. VAISALA _________________________________________________________27... - Page 30 User's Guide ________________________________________________________ The following figure illustrates an example of temperature and humidity stabilization. In this example, an HMP233 probe has been transferred from a temperature of 75 °C (oven) to a suitable hole of the NaCl salt chamber; the calibrator is at room temperature.
- Page 31 NaCl salt chamber. The figure shows that after 40 minutes, the reading differs 1.4 %RH from the final reading. 0606-177 Figure 13 An example of the RH and T stabilization when the transportation and calibration site temperatures are different VAISALA _________________________________________________________29...
- Page 32 User's Guide ________________________________________________________ This page intentionally left blank. 30 _____________________________________________________M210185EN-C...
- Page 33 12 × 2.5 mm NBR70 12 mm measurement hole 13.5 × 2.5 mm NBR70 13.5 mm measurement hole 18.3 × 2.4 mm NBR70 18.5 mm transit cover 41.2 v 3.0 mm NBR70 chamber 50.0 × 2.0 mm NBR70 VAISALA _________________________________________________________31...
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Page 35: Spare Parts And Accessories
19731HM Ready-dosed NaCl salt package with calibration certificate 19732HM Ready-dosed K salt package with calibration certificate 19746HM Plug set 19766HM Salt chamber 19767HM Ion exchanged water 211302SP Adapter fitting for 12 mm probes (spare part) HM27032 Transit bag VAISALA _________________________________________________________33... - Page 36 User's Guide ________________________________________________________ This page intentionally left blank. 34 _____________________________________________________M210185EN-C...
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Page 37: Technical Data
K ±1.5 %RH + Greenspan's uncertainty* The uncertainty given in Greenspan's calibration table (on page 25) at the calibration temperature, for example the accuracy of LiCl salt at +20 °C is ±(1.0 + 0.3) %RH = ±1.3 %RH VAISALA _________________________________________________________35... - Page 38 User's Guide ________________________________________________________ Response time (probe and calibrator at the same temperature) with Vaisala sensors typically 10 min (deviation of the final value < ±1 %RH) Accuracy of the thermometer: with mercury ±0.3 °C with red capillary liquid ±1 °C Dimensions 0 ×...
- Page 39 *M210185EN*...
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