Vaisala HMP243 Guide de l'utilisateur télécharger pdf (Page 55)

HMP240 series

M210300en User's Guide

6.2.2.2 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 Cali in the main menu and then T (Ta for the

additional T sensor head); select two-point calibration T

(or Ta) 2 point cal. Change the first point reading with the

arrow keys and press ENT.

• 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.

• If necessary, change the second point reading with the ar-

row keys and press ENT.

6.2.2.3 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.

• Connect an ammeter/voltmeter to the analogue outputs

(connector X2). Give command ¡¡l¡ (or ¡l¡¡ for

the T sensor head). 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.

• 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.

• If necessary, adjust with the arrow switches to the correct

value and press ENT. At the second calibration point the

second LED from the left flashes.

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Vaisala HMP243 Guide de l'utilisateur Page 55