Vaisala DMT346 - Manual (Page 152)

User's Guide _______________________________________________________________________
152 __________________________________________________________________ M210762EN-G
Two-Point Relative Humidity Adjustment
Using Display/Keypad
NOTE Reference humidities must be ~0 %RH and 30 ... 75 %RH. A suitable
product for the two point RH calibration is for example the Vaisala
Humidity Calibrator HMK15.
1. Press the ADJ button (see Figure 2 on page 23) to open the
ADJUSTMENT MENU:
2. Select Adjust T
d
measurement,
press ► button.
3. Select 2-point RH adjustment, press START. At this point, the
device carries out the chemical purge.
4. Remove the filter from the probe and insert the probe in the dry end
reference condition (~0 %RH). Press OK.
0706-018A
Figure 73 Inserting the Sensor in Reference Humidity 1
5. Wait at least 30 minutes for the sensor to stabilize. Follow the
stabilization from the GRAPH display. Press EXIT to return to the
previous display.
6. Press READY when stabilized. Enter the reference value by using
the arrow keys.
0706-019B
Figure 74 Waiting for Readings to Stabilize
Now proceed to the adjustment at the wet end reference condition
(30 ... 75 %RH) and carry out the procedure as described in the
previous items.