Vaisala MM70 User Manual download pdf (Page 48)

USER'S GUIDE____________________________________________________________________

1. Select a

, RH, T or H

O (H

O can only be checked, not

adjusted). Press the SELECT key.

2. Check that the probes are located in equal conditions and wait

until the readings are stabilized (can take 30 minutes or more). If

you are near the probes, do not breathe towards them.

3. To continue adjusting, press the ADJUST key.

4. Select To same as... Press the SELECT key. (MI70 always

recognizes the port to which the MMP70-series probe is

connected.)

5. Confirm by pressing the YES key.

6. Adjustment is done. To return to the basic display, first press the

BACK key, then the EXIT key.

7. Switch off the MI70 and detach the calibration cable.

1-point Adjustment by Using a

Calibrator

When adjusting a transmitter only in one reference condition, take

care that the reference condition represents well the measuring

environment.

If you use humidity calibrator HMK15, use the adapter fitting (13.5

mm) on the measurement hole.

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

the section

Calibration and Adjustment of MMT318 Transmitters on

page

45. Then proceed as follows:

1. Select the quantity and press the SELECT key.

2. Remove the filter from the transmitter´s probe and insert the

probe head into the reference condition.

3. To continue adjusting, press the ADJUST key.

4. Select 1-point adjustment, press the SELECT key.

5. Press the READY key when the reading is stabilized in the

reference condition (takes about 30 minutes or more). You can

follow the stabilization from the graph display, by pressing the

GRAPH key.

6. Enter correct reference value by using the arrow keys. Press the

OK key.

7. Confirm by pressing the YES key.

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Vaisala MM70 User Manual Page 48