Vaisala HMP230 User Manual
Page 63
HMP230 SERIES
M210225en-B
User's Guide
57
•
Insert the sensor head into a measurement hole of the NaCl chamber.
•
Wait at least 30 minutes.
•
If necessary, change the second point reading with the arrow keys and
press ENT.
7.1.2.3. With LED commands
•
Leave the calibrator and the transmitter for at least 4 hours in the
same space so that their temperatures have time to equalize. Remove
the filter cap on the transmitter.
Disconnect the security lock jumper!
•
Insert the sensor head into a measurement hole of the LiCl chamber.
•
Wait at least 30 minutes.
•
Connect an ammeter/voltmeter to the analogue outputs (connector
X2). Give command ¡¡¡l. At the first calibration point the LED
on the left flashes; adjust the first point (offset) with the arrow
switches to the value given in the calibration table (Chapter 7.1.4) and
press ENT switch.
•
Insert the sensor head into a measurement hole of the NaCl chamber.
•
Wait at least 30 minutes.
•
Check that the reading corresponds within the desired accuracy to that
given in the calibration table (Chapter 7.1.4). If not, adjust the second
point with the arrow switches to the correct value and press ENT. At
the second calibration point the second LED from the left flashes.
7.1.3. Calibration procedure after sensor change
Humidity calibration should be performed in stable conditions using saturated
salt solutions as a reference.
7.1.3.1. With serial commands
•
Leave the calibrator and the transmitter for at least 4 hours in the
same space so that their temperatures have time to equalize. Remove
the filter cap on the transmitter.
Disconnect the security lock jumper!
•
Insert the sensor head into a measurement hole of the LiCl chamber.
•
Wait at least 10 minutes.