USER'S GUIDE Vaisala CARBOCAP® Carbon Dioxide Calibrator for the GMP220 series probes GM K220 U421EN-1.
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 2006 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...................................................................... 2 Safety.................................................................................. 2 Warranty ............................................................................. 2 CHAPTER 2 PRODUCT DESCRIPTION ...................................................................... 3 Introduction ......
User's Guide __________________________________________________________________________ CHAPTER 1 GENERAL INFORMATION Safety Throughout the manual, important safety considerations are highlighted as follows: WARNING Warning alerts you to a serious hazard. If you do not read and follow instructions very carefully at this point, there is a risk of injury or even death. CAUTION Caution warns you of a potential hazard.
Chapter 2______________________________________________________________Product description CHAPTER 2 PRODUCT DESCRIPTION Introduction Although Vaisala's CO2 instruments are inherently stable, periodical checkings should be performed according to the recommendations given in the relevant user's guide.
User's Guide __________________________________________________________________________ GMK220 Calibrator for the GMP220 Series Probes 1. Probe to be checked (not included) 2. Probe connector and the cable 3. Rotameter 4. Flow adjustment screw 5. Chamber (including 0-ring 18.3x2.4 NBR 70 ShA,) 6. Gas inlet 7. Gas outlet 8. Serial cable (connects calibrator and PC) 9. 24 V Supply voltage in (+) 10. Ground (-) Figure 1 CAUTION GMK220 Calibrator.
Chapter 2______________________________________________________________Product description Additional equipment The following additional equipment is needed for checking and calibration operations: • Traceable reference gas/es as follows: spot checking: one gas with CO2 concentration within the measuring range of the probe. Accuracy shall be 1% (or better). two-point calibration: two gases with CO2 concentrations representing the low and high end of the probe's measuring range. See the requirements below.
User's Guide __________________________________________________________________________ CHAPTER 3 OPERATION Spot checking Spot checking is carried out when there is a need to check if the probe (GMP221 or GMP222) is operating correctly. The reference gas concentration must be within the measuring range of the probe to be checked. Please read requirements concerning the reference gases from Chapter2 Additional equipment before starting the operation.
Chapter 3_____________________________________________________________________ Operation 6. Let the calibrator settle for 10 minutes. 7. Connect the reference gas and adjust the flow rate to 0.6 l/min with a screwdriver (item 4, Figure 1). Flush the chamber with the gas for 5 minutes. 8. Input the ambient barometric pressure. MF_PRESSURE XXXX where xxxx= pressure in hPa. Example: >MF_PRESSURE 1013 MF_PRESSURE=1013 > 9. Input the ambient temperature.
User's Guide __________________________________________________________________________ 11. Stop the output with the ESC-button (or by typing MF_MODE 0). 12. The difference between the average reading and the actual concentration of the reference gas shall be within the long term stability specifications of the probe. If there is need for calibration, please refer to the chapter Two- point calibration. 13. Disconnect the gas flow and remove the probe from the chamber.
Chapter 3_____________________________________________________________________ Operation Two-point calibration The reference gases used for the two-point calibration shall represent the low and high end of the probe's measuring range. Please, read recommendations concerning the reference gases in Chapter 2 Additional equipment before starting the operation. Perform the two-point calibration according to the following instructions: 1. Connect the cable (item 2, Figure 1) to the probe to be tested. 2.
User's Guide __________________________________________________________________________ 9. Give the input data for the calibration. CALICALI L where CO2 concentration is given in ppm, Pambient is pressure given in hPa and Tambient is temperature given in °C. The sample quantity determines the number of measurements of which averages are calculated. The sample quantity is recommended to be at least 200.
Chapter 3_____________________________________________________________________ Operation 12. Give the input data for the calibration. CALICALI H where CO2 concentration is given in ppm, Pambient is given in hPa and Tambient is given in °C. The sample quantity determines the number of measurements of which averages are calculated. The sample quantity is recommended to be at least 200.
User's Guide __________________________________________________________________________ PROBE_SAVE >PROBE_SAVE New calibration parameters are now saved in the probe. 14. Disconnect the gas flow and remove the probe from the chamber. After two-point calibration it is recommended to ensure the correct operation of the probe by carrying out a spot checking procedure using both low and high end gases. The readings should be within the accuracy specifications of the transmitter.
Chapter 4_________________________________________________________________ Technical data CHAPTER 4 TECHNICAL DATA Operating temperature range +15...
www.vaisala.
