Vaisala PTB330TS - Manual (Page 54)

User's Guide ______________________________________________________________________
52 ___________________________________________________________________M210983EN-A
4. Activate the adjustment mode by holding down the ADJ button on
the probe until the message below appears on the MI70 display.
0811-086 Figure 23 Starting Adjustment Mode for HMP155
5. Press OK to move on to the adjustment and select RH as the
quantity you want to adjust.
0811-087 Figure 24 Select Quantity
6. Check the environment settings if prompted.
7. Insert the probe into a known reference environment. You can, for
example, use the HMK15 humidity calibrator.
If you have the additional temperature probe, it is not necessary to
place it into the reference environment. The HMP155 turns off the
additional temperature probe during RH adjustment, and uses
internal temperature measurement instead. When you exit the
adjustment mode or start calibrating temperature, the HMP155
takes the temperature probe into use again.
8. Wait for the reading to stabilize, and compare the reading with the
reference. If the reading is not within the stated accuracy of the
HMP155, continue this procedure to adjust the measurement. If the
reading is accurate, exit the adjustment mode by pressing the Back
button, then the Exit button.
9. Press the Adjust button and select 1-point or 2-point calibration. If
a Cannot adjust message is displayed, press OK and try again.
10. Follow the instructions given on the display to finish the
adjustment.