Vaisala DMP248 Service Manual download pdf (Page 68)

OPERATING MANUAL_______________________________________________________________

62 _____________________________________________________________________ U263EN-1.4

• The stabilization of the sensor can be monitored well by entering c

<cr> instead of the reference value.

Using 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

before turning the transmitter on!

• Check the transmitter against the reference.

• Select &DOL in the main menu and then 7; select two-point

calibration 7SRLQWFDO. Change the first point reading with the

arrow keys and press ENT.

• Change the temperature and again check the transmitter against

the reference.

• Check that the reading corresponds with the reading of the

reference instrument. If not, adjust the second point.

• If necessary, change the second point reading with the arrow keys

and press ENT.

Using 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

before turning the transmitter on!

• 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.

• Change the temperature and again check the transmitter against

the reference.

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Vaisala DMP248 Service Manual Page 68