Vaisala HMP260 - Manual (Page 51)

HMP260 SERIES
HMP260-U017en-1.5 Operating Manual
1997-11-25 45
6.2.1 One point offset correction
6.2.1.1 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 <cr> and enter the first point value and press
<cr>:
CT <cr>
'T : xx.x Ref1 ? yy.y <cr>
Press any key when ready
• If you want to see how the sensor stabilizes to the reference
temperature, enter c <cr> instead of the first reference:
T : 0.90 Ref1 ? c <cr>
T : 0.55 Ref1 ? c <cr>
T : 0.55 Ref1 ? 0.0 <cr>
Press any key when ready...
• After giving the correct temperature value (Ref1) and pressing <cr>
press any key and press <cr>.
6.2.1.2 Using display/keypad 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.
• Select Cali in the main menu and then T cal; select two-point
calibration T 2 point cal. Change the first point reading with the
arrow keys and press ENT.
• Select T 1 point cal, change the reading to correspond to the
reference and press ENT.