Vaisala CARBOCAP GMT220 SERIES Guia do Utilizador descarregar pdf (Página 18)

USER'S GUIDE_______________________________________________________________________

16 ___________________________________________________________________ M010022EN-C

Setting relay trigger points

The relays of the transmitter turn ON/OFF when the CO

content

reaches the predefined trigger point. There are two trigger points for

both relays. The higher limit activates the relay and the lower

deactivates it. The two limits are used to prevent the relay switching

back and forth when the measured value is very close to set point.

MF_Rx_HIGH yyy<cr>

where: x = 1 or 2 (number of the relay)

yyy = trigger point (CO

content in ppm)

Example of setting the higher trigger limit of the relay 1:

>MF_R1_HIGH 1200

MF_R1_HIGH=1200.0000

Save the settings:

MAIN_SAVE F<cr>

Give the lower trigger limit:

MF_Rx_LOW yyy<cr>

where: x= 1 or 2 (number of the relay)

yyy = trigger point (CO

content in ppm)

Example of setting the lower trigger limit of the relay 1:

>MF_R1_Low 900

MF_R1_LOW=900.000000

Save the settings:

MAIN_SAVE F<cr>

Pressure compensation

For achieving the most accurate measurements in high altitudes where

the barometric pressure is lower than in the sea level, the actual

pressure value can be set to the GMT220's software. The factory

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Vaisala CARBOCAP GMT220 SERIES Guia do Utilizador Página 18