Vaisala PTU300 Guide de l'utilisateur télécharger pdf (Page 175)

Chapter 7 ____________________________________________________ Calibration and adjustment

VAISALA _______________________________________________________________________ 173

To start, remove the filter from the probe and insert the probe into a

measurement hole of the driest reference chamber you intend to

use. Proceed from low to high humidity. Remember to allow at

least 30 minutes for the sensor to stabilize at each point.

7. When done preparing the list, remove the probe from the last

measurement chamber and re-attach the filter.

8. On the serial line, issue the MPC RH INIT command and start

entering the readings and reference points from the list you

prepared in step 6. When you have no more points to enter, press

enter to save the points.

>mpc rh init

1 Reading : ? 12.2

1 Reference: ? 11

2 Reading : ? 34

2 Reference: ? 33

3 Reading : ? 75.5

3 Reference: ? 75

4 Reading : ? 97.3

4 Reference: ? 97

5 Reading : ?

Mpc points saved.

9. Issue the MPC RH LIST command to verify the list you entered:

>mpc rh list

MPC : OFF

# Reading Reference Correction

1 12.20 11.00 -1.20

2 34.00 33.00 -1.00

3 75.50 75.00 -0.50

4 97.30 97.00 -0.30

10. If you are satisfied with the correction list, enable multipoint

correction by issuing the command MPC RH ON.

>mpc rh on

11. Multipoint adjustment of relative humidity is now complete.

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 216 217

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Vaisala PTU300 Guide de l'utilisateur Page 175