3 using led commands, 2 two point temperature calibration, 1 using serial commands – Vaisala HMP260 User Manual
Page 52
HMP260 SERIES
Operating Manual
HMP260-U017en-1.5
46
1997-11-25
6.2.1.3
Using LED commands
Disconnect the security lock jumper!
•
Leave the reference instrument and the transmitter for at least 4 hours
in the same space so that their temperatures have time to equalize.
Remove the filter cap prior to calibration.
•
Check the transmitter against the reference.
•
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 same reading with the reference and press ENT
switch.
•
After adjusting the offset point and pressing ENT the second LED
from left flashes. Press ENT without changing the output value.
6.2.2
Two point temperature calibration
6.2.2.1
Using serial commands
Disconnect the security lock jumper!
•
Leave the reference instrument and the transmitter for at least 4 hours
in the same space so that their temperatures have time to equalize.
Remove the filter cap prior to calibration.
•
Check the transmitter against the reference.
•
Give command CT
CT
'T : xx.x Ref1 ? yy.y
Press any key when ready
•
If you want to see how the sensor stabilizes to the reference
temperature, enter c
T : 0.90 Ref1 ? c
T : 0.55 Ref1 ? c
T : 0.55 Ref1 ? 0.0
Press any key when ready...
•
Change the temperature and check the transmitter again against the
reference.
•
Check that the reading corresponds to the reading of the reference
instrument. If not, adjust the second point
•
Press any key, enter the second point value and press
'T : xx.x Ref2 ? yy.y