Vaisala DMP248 Manual de servicio descargar pdf (Pagina 63)

CHAPTER 6_______________________________________________________________ CALIBRATION

VAISALA _________________________________________________________________________ 57

• Press any key and enter the second point value and press <cr>.

RH : xx.x Ref2 ? yy.y <cr>

• The stabilization of the sensor can be monitored here as well by

entering c <cr> instead of the reference value.

Using display/keypad commands

• Leave the calibrator and the transmitter for at least 4 hours in the

same space so that their temperatures have time to equalize.

Remove the filter cap on the transmitter.

Disconnect the security lock jumper

before turning the transmitter on!

• Place the sensor head in the calibration hole of the LiCl bottle (dry

end reference) in the humidity calibrator.

• Select &DOL in the main menu and then 5+; select 1RW FKDQJHG

and then two-point calibration 5+  SRLQW FDO. Change the first

point reading with the arrow keys to correspond the reference

humidity and press ENT; pressing an arrow once changes the

reading by 0.05 %RH.

• Place the sensor head in the calibration hole of the NaCl bottle

(wet end reference) in the humidity calibrator.

• Wait for 10 minutes.

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

and press ENT.

Using LED commands

• Leave the calibrator and the transmitter for at least 4 hours in the

same space so that their temperatures have time to equalize.

Remove the filter cap on the transmitter.

Disconnect the security lock jumper

before turning the transmitter on!

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Vaisala DMP248 Manual de servicio Pagina 63