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Custom Electronics Systems, Inc.
455 FORUM PARKWAY RURAL HALL, NORTH CAROLINA 27045
PHONE: (336) 969 2411 FAX: 336 969 2412 EMAIL: INFO@DRAFTRANGE.COM
CES 455 Purge Master

FEATURES
Selectable Pulse Purge Method
Multilayer Protection
Modular Design

GENERAL DESCRIPTION
The CES 455 Purge Master is a flow element purge control system and draft range pressure transmitter combination that was designed for use in measurement applications involving particulate-laden air or gas. The system provides periodic removal of dirt which may accumulate in the element pressure sensing traverses and instrument connecting tubes utilizing a high volume, high pressure air purge

Each System is self contained and dedicated to a single flow element. The frequency and duration of the purge function is field adjustable. The CES 455 consists of a CES 455 Sequence Controller, a Ces 467MP Auto Zero Transmitter, and 3 flow control valves. Each 455 Purge Master is mounted in a steel NEMA enclosure for ease of installation and protection.

The CES 455 features a pulse purge method that provides up to 15 bursts of air to help dislodge any particles and moisture, while conserving shop air. The duty cycle of the pulse and the number of pulses are user selectable as needed to meet purge requirements.

The CES 455 Purge Master Sequence Controller controls the operating sequence and event scheduling. Time and frequency of daily purge cycles are user selectable. Up to 48 cycles can be programmed to occur during that 24 hour period.

For testing purposes, the 455 Purge Sequence Controller also features a front panel mounted switch that allows the user to start a purge cycle manually. This allows technicians to insure the purge cycle is operating, or to actually purge the system should the need arise.

A remote purge is possible with the standard CES 455 Purge Maser. Allowing for interface with existing PLC’s. Timing is then controlled by the PLC entirely or it is used as a secondary purge control.

The Purge Master provides multilayer protection for the transmitter. First, the transmitter contains a 3 way valve that is energized during an Autozero cycle and during purge. Second, the selection valves connect the flow element to either the high pressure supply or to the transmitter. These valves also vent both sides of the transmitter during a purge cycle. The purge valve controls the purge air supply, providing a third level of protection. Finally, by electronically controlling the valves sequence of energizing, the transmitter is prevented from seeing the high pressure purge air should the flow element become completely blocked

The Purge Master's modular design makes it easily customized to suit your process requirements. Options including temperature compensation, mass flow compensation, remote starting purge cycles, displays, a vlave only package where you provide the timing and control of the pugre, all make the CES 455 flexible enough to meet any demands.