Vaisala HUMICAP MM70 Guide de l'utilisateur télécharger pdf (Page 48)

USER'S GUIDE____________________________________________________________________

Calibration and Adjustment of

MMT330 Transmitters

You can check and adjust MMT330 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 211339-connection cable between the service port

of the MMT330 transmitter and the bottom connector of the

MI70 indicator. To ensure durable connection, screw the metal

ring (located at the round end of the cable) clockwise until it

tightens up. (Respectively, when disconnecting the cable, first

screw the metal ring counterclockwise until it loosens and then

pull out the plug.)

2. Turn on the indicator.

- 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 on the lowest row.

- In case MI70 is used as an display (without its own probe),

the reading of the MMT330 transmitter is shown on the

display.

3. Remove the MMI330 transmitter unit from the mounting plate

and press the adjustment key once. Adjustment key is located at

the mother board of the transmitter. Now MI70 is starting the

Adjustment mode.

4. Press the OK key to start adjustment.

Field Checking and Adjustment by

Using a Calibrated Reference Probe

When using this adjustment method, start with the steps 1 through 4 in

the section Calibration and Adjustment of MMT330 Transmitters on

page 46. Then proceed as follows:

1. Select a

, RH, T or H

O (H

O can only be checked, not

adjusted). Press the SELECT key.

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Vaisala HUMICAP MM70 Guide de l'utilisateur Page 48