Vaisala CARBOCAP GMT220 SERIES Podręcznik Użytkownika Pobierz pdf (Strona 31)

Chapter 5 ______________________________________________________________ Maintenance

VAISALA _______________________________________________________________________ 31

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Figure 11 Location of the GM70 Adjustment Button

6. Press OK to confirm the adjusting.

7. Select CO2, press SELECT.

8. Press YES to give the ambient pressure and temperature values.

To continue adjusting press EXIT.

9. Now the adjustment mode is on. Press GRAPH to confirm that the

readings have stabilized. Go back and press ADJUST to select the

adjustment method.

10. Select 2-point adjustment, press SELECT. Press READY with the

stabilized reading in the lower reference concentration.

11. Give the lower reference concentration value by using the arrow

buttons (for example, if you are using pure nitrogen, enter value 0

ppm). Take care that you give the correct value in correct units, as

you cannot revert the earlier values after accepting the new values.

Press OK.

Next move on to the adjustment at the second (high-end)

reference point.

12. Take out the tubing from the low-end gas bottle and connect it to

the high-end gas bottle.

13. Let the high end reference gas flow and stabilize with a flow rate of

0.6 l/min. Follow the reading of GM70, and after it has stabilized,

wait for 6 more minutes.

14. Press READY with the stabilized reading in the higher reference

concentration.

15. Give the high-end reference concentration value by using the arrow

buttons. The analyzed CO

concentration of the reference gas is

typically printed on the bottle.

Take care that you give the correct value in correct units, as you

cannot revert to the earlier values after accepting the new values.

Press OK.

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Vaisala CARBOCAP GMT220 SERIES Podręcznik Użytkownika Strona 31