Vaisala HMP228 Guide de l'utilisateur télécharger pdf (Page 40)

User's Guide _______________________________________________________________________

38 ____________________________________________________________________M210498en-A

24. Press BACK, EXIT, EXIT to return to the basic display.

Checking and adjusting the MMT318 transmitters

You can check and adjust MMT318 transmitter reading against a

calibrated reference probe of MMP78 or against another reference

condition by using MI70 indicator in communication. Follow the first 4

steps and continue according to the chosen calibration method.

1. Connect the DRW216050-calibration cable between the screw

terminal connector of the MMT318 transmitter and the MI70

indicator.

2. Turn on MM70.

- In case you use a MMP78 probe as a reference: The reading of the

transmitter is shown on the first or middle row of the display,

depending on the connector port to which the calibration cable is

connected. Value of the port I is shown on the upper row of the

display and the value of the port II on the lower row of the display.

Difference of the readings is shown in the lowest row.

- In case MI70 is used as an display, the reading of the MMT318

transmitter is shown on a display.

3. Remove the MMT318 transmitter unit from the mounting plate and

press the adjustment button once. Now MI70 is starting the Adjustment

mode.

4. Press OK to start adjustment.

Field checking and adjustment by

using a calibrated reference probe

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

5. Select a

, RH ,T or H

O (H

O can be checked only) press SELECT.

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Vaisala HMP228 Guide de l'utilisateur Page 40