Vaisala MM70 - Manual (Page 46)

USER'S GUIDE____________________________________________________________________
1. Select a
w
, RH, T or H
2
O (H
2
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 43. 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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