Vaisala MM70 - Manual (Page 45)

Chapter 5 ___________________________________________ CALIBRATION AND ADJUSTMENT
0605-091
Figure 19 Adjustment Mode
Relative Humidity Adjustment by
Using a Calibrated Reference Probe
When using this adjustment method, start with the steps 1 through 12
on the previous page. Then proceed as follows:
1. Ensure that the probes are located in the same conditions.
2. Wait until the readings have stabilized. If the difference between
the humidity readings is less than 2 % RH, there is no immediate
need for adjustment.
3. Adjust the transmitter reading to correspond a reading of the
reference probe by pressing the ADJUST key.
4. Select To same as RH
I/II
. Press the SELECT key.
5. Confirm by pressing the YES key.
6. To return to the basic display, first press the BACK key, then
the EXIT key twice.
1-point Relative Humidity
Adjustment by Using a Calibrator
You can use Vaisala humidity calibrator HMK15 to achieve the
reference humidities. MI70 indicator is working as a communicator in
the calibration procedure. When using this adjustment method, start
with the steps 1 through 12 on the previous page. Then proceed as
follows:
1. Insert the transmitter probe to the reference humidity.
2. Press the ADJUST key.
3. Select 1-point adjustment. Press the SELECT key.
VAISALA _______________________________________________________________________ 43