Vaisala BAROCAP PTB330 Guia do Utilizador descarregar pdf (Página 91)

Chapter 4 ________________________________________________________________ Operation

VAISALA_______________________________________________________________________ 89

Operation of Relays

Quantity For Relay Output

A relay monitors the quantity chosen for the relay output. Any of the

quantities available can be chosen.

Measurement-Based Relay Output

Modes

Relay Setpoints

When the measured value is in between the "above" and "below"

values, the relay is passive. When choosing lower value as "above"

value and higher value as "below" value, the relay is passive when the

measured value is not between the setpoints. You can also set only one

setpoint. See Figure 41 on page 90 below for illustrative examples of the

different measurement-based relay output modes.

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Vaisala BAROCAP PTB330 Guia do Utilizador Página 91