Vaisala HMP243 Guía de usuario Pagina 53

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HMP240 series
M210300en User's Guide
51
6.2.1 One point offset calibration
6.2.1.1 With serial commands
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.
Disconnect the security lock jumper!
Check the transmitter against the reference.
After giving the correct temperature value (Ref1) and
pressing <cr>, press any key and then <cr>.
6.2.1.2 With display / keypad commands
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.
Disconnect the security lock jumper!
Check the transmitter against the reference.
Select T 1 point cal (or Ta 1 point cal), change the
reading to correspond to the reference and press ENT.
6.2.1.3 With LED commands
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.
Disconnect the security lock jumper!
Check the transmitter against the reference.
After adjusting the offset point and pressing ENT, the sec-
ond LED from left flashes. Press ENT without changing
the output value.
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