Vaisala HMP228 User's Guide download pdf (Page 48)

User's Guide _______________________________________________________________________

46 ____________________________________________________________________M210498en-A

2-point adjustment

Follow the steps from 1 to 4 and continue as follows:

5. Select 2-point adjustment. Press SELECT to continue.

6. Set the probe to a lower reference temperature. You can follow the

stabilization from the GRAPH display.

7. Press READY when the reading is stabilized. Give the lower

reference temperature by using the arrow buttons. Press OK.

8. Set the probe to the higher reference temperature. You can follow

the stabilization from the GRAPH display. Press READY when the

reading is stabilized.

9. Give the higher reference temperature by using the arrow buttons.

Press OK.

10. Confirm the adjustment, press YES. (By pressing NO you return

to adjustment mode display and no changes are made). If the

difference between two references is less than 30 °C, adjustment can

not be done.

11. Calibration is carried out. Press BACK to exit the adjustment mode

and EXIT to return to the basic display.

Last adjustment date

To see the last adjustment date, select Last adjustment date. You can check

this date also from the

Device information, see page 26.

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Vaisala HMP228 User's Guide Page 48