Veo Observer Plus Instruções de Operação descarregar pdf (Página 139)

Charged Aerosol Detectors

Corona Veo and Corona Veo RS

Operating Instructions Page 131

Relay Outputs

The "Pump Off" output contact is used to send a signal to the pump (or other external

device) to stop the flow of mobile phase and turn off the pump. This signal may be used to

turn off the pump to prevent detector from being flooded with mobile phase if the gas

pressure falls below 50 % of the required gas volume for more than 60 seconds.

To use the "Pump Off" contact closure, the HPLC system must be able to accept an input

from the detector that can be programmed to turn off liquid flow. In some cases, a special

cable is required.

The pins labeled "CC1"' and "CC2" provide contact closures that can be used to start an

external device (for example, an autosampler) or to change a valve position. The two ports

act in a similar fashion to the "Pump Off" output. When the output contact closures are

used, connect the outputs according to their polarity ("+" or "-"). Connect the third wire on

the Digital I/O cable (part no. 70-4850) to the ground of the pin.

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Veo Observer Plus Instruções de Operação Página 139