Vaisala GMK220 User Manual
USER'S GUIDE
Vaisala CARBOCAP® Carbon Dioxide
Calibrator for the GMP220 series probes
GM K220
U421EN-1.1
PUBLISHED BY
Vaisala Oyj Phone (int.): +358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
FIN-00421 Helsinki
Finland
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.
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...................................................................... 2
Safety.................................................................................. 2
Warranty............................................................................. 2
CHAPTER 2
PRODUCT DESCRIPTION...................................................................... 3
Introduction ........................................................................ 3
GMK220 Calibrator for the GMP220 Series Probes ............. 4
Additional equipment ......................................................... 5
CHAPTER 3
OPERATION........................................................................................... 6
Spot checking..................................................................... 6
Two-point calibration .......................................................... 9
CHAPTER 4
TECHNICAL DATA ................................................................................13
VAISALA _____________________________________________________________________________1
User's Guide __________________________________________________________________________
CHAPTER 1
GENERAL INFORMATION
Safety
Throughout the manual, important safety considerations are
highlighted as follows:
WARNING
CAUTION
NOTE
Warranty
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 warns you of a potential hazard. If you do not read and
follow instructions carefully at this point, the product could be
damaged or important data could be lost.
Note highlights important information on using the product.
Vaisala issues a guarantee for the material and workmanship of this
product under normal operating conditions for one year from the date
of delivery. Exceptional operating conditions, damage due to careless
handling or misapplication will void the guarantee.
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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. The GMK220 calibrator (Figure 1)
is intended for spot checking and two-point calibration of the carbon
dioxide probes GMP221 and GMP222, which currently are used in
Vaisala's GMT220 and GMM220 series CO2 transmitters.
NOTE
GMK220 can be used for
• spot checking with one reference gas
• two-point calibration with two reference gases
Spot checking can be carried out when there is a need to check if the
probe is operating correctly. If adjustement is needed, two-point
calibration shall be carried out.
GMK220 needs only the probes
For checking and calibration, the GMK220 needs only the probes, not
the whole transmitter. The GMK220 calibrator calibrates and stores
the calibration parameters to the non-volatile memory in the probes.
This enables true interchangeability of the probes and forms a good
basis for the continuous measurements with good traceability.
The GMK220 can be used to calibrate the probes marked with a little
star (*) in the probe label. A little star indicates that the probe has the
program version compatible with the calibrator.
VAISALA _____________________________________________________________________________3
User's Guide __________________________________________________________________________
1. Probe to be checked (not
GMK220 Calibrator for the GMP220 Series
Probes
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 (-)
CAUTION
4 __________________________________________________________________________ U421EN-1.1
Figure 1 GMK220 Calibrator.
When handling the GMK220 calibrator, please be careful not to
damage the board on the backside of the plate.
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