Dewpointstat

The Dewpointstat function of the NEPS1000 Advantage is able to monitor and control the removal of in-built hygroscopic moisture within a system or equipment.

The operation of the Dewpointstat is fully automatic and only requires the operator to set the control level (dewpoint) required.

The Dewpointstat requires the dewpoint sensor to be installed in direct contact within the internal volume space of the system or equipment to be purged.

The system or equipment to be purged has to be connected to the NEPS1000 Advantage in the standard arrangement for single point purging.

The Dewpointstat will operate in any of the three selectable purging pressures.

The Dewpointstat dewpoint control level required is selected from the menu input function of the NEPS1000 Advantage.

The NEPS1000 Advantage Dewpointstat has an automatic adjustable reset differential. For example if the dewpoint control level is -40ºC when the dewpoint sensor measures this dewpoint during purging the dry nitrogen gas is switched off and isolated.

Depending on the rate of moisture release from the components within the equipment the NEPS1000 Advantage will not restart the purging cycle until the dewpoint has degraded to the set point.

The time taken for the internal dewpoint within the equipment to degrade from -40ºC to -30ºC can be continuously recorded using a data logger. From the volume of the equipment air space being purged the moisture release can be accurately calculated.

The duty cycle between purging the system and “off time” will vary depending on the amount of moisture released from the components within the system. When the time for the dewpoint to degrade from -40ºC to -30ºC is a regular time interval the systems source of moisture is no longer hygroscopic but the moisture being transmitted through the seals, gaskets or non metallic materials used in the system construction.