Vaisala PTU300 - Manual (Page 165)

Chapter 7 ____________________________________________________ Calibration and adjustment
VAISALA _______________________________________________________________________ 163
0706-054
Figure 75 Adjustment Menu
Table 38 Indicator Led Functions
Indicator Led Function Description
LED off Adjustment locked
LED on Adjustment available
LED blinking evenly Measurement not stabilized
LED blinking with short pulses Performing chemical purge
NOTE If using a warmed probe (PTU307 option), probe heating will be
interrupted when ADJ button is pressed. Allow sufficient time for the
probe to reach ambient temperature before starting the adjustment
procedure.
NOTE Fixed pressure compensation value of 1013.25 hPa is used when in
adjustment mode
Pressure Adjustment
One-Point Adjustment Using
Display/Keypad
1. Carry out the chemical purge (if available).
2. Press the ADJ button to open the ADJUSTMENT MENU.
3. Select Adjust P measurement, press the right arrow button.
4. Select P
1
adjustment. Press the START key.
5. Let the readings stabilize. Press the READY key when stabilized.
6. Enter the actual pressure of the reference used using the up/down
arrow buttons. Press the OK key.
7. Press the YES key to perform the adjustment. Press the OK to
return to the adjustment menu.