Vaisala DM70 - Manual (Page 70)

USER'S GUIDE____________________________________________________________________
7. To select the adjustment method, press Adjust.
8. Select 2-point adjustment and press Select. Then press
OK to continue.
9. Set the probe to a lower reference value of relative humidity 1) .
You can follow the stabilization from the graph display by
pressing Graph. When the reading has stabilized, press
Ready.
10. Use the arrow buttons to give the lower reference value of
relative humidity. Then press OK.
11. Set the probe to a higher reference value of relative humidity 1) .
When the reading has stabilized, press
Ready. You can follow the stabilization from the graph
display by pressing Graph.
12. Use arrow buttons to give the higher reference value of relative
humidity. Then press OK.
13. Confirm the adjustment by pressing Yes. If you press No,
the adjustment display returns and no changes are made.
NOTE DMP74A: If the difference between the two references is less than 30
%, the adjustment cannot be done.
14. Now the adjustment is completed. To exit the adjustment mode,
press Back.
15. To return to the basic display, press Exit.
16. If you do not continue with the dewpoint adjustment, place the
screw back onto the calibration button.
1) If there is a temperature difference between the generated reference
and the probe temperature, relative humidity must be calculated to
correspond to the temperature of the probe.
Two-Point Relative Humidity Adjustment of
DMT340 Series Transmitters Using DM70
DM70 can be used for making the two-point relative humidity
adjustment of DMT340 series transmitters.
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