Ptronik Pty Limited
ABN: 31 003 718 161
17 Windsor Street
RICHMOND NSW 2753
AUSTRALIA
TEL: +61 2 4578 9611
FAX: +61 2 4578 9622
Email us

.The DP CONTROLLER will monitor and display the differential pressure across your dust collectors clean and dirty sides. To achieve effective on demand cleaning for extended bag or cartridge life as well as reduced compressed air consumption and improved filter efficiency. The sensor will identify a pre-set high level limit and start the timer/sequencer (a yellow LED will illuminate) until the pre-set low level has been reached and then stop the sequence. When the diff.pressure increases and reaches the pre-set alarm level, a relay will energize and a red LED indicate DP to high. To operate the timer manually and bypass the differential control, a switch has been fitted on the front panel to select ON or OFF for the on demand cleaning.

The DP CONTROLLER has three programmable presets from 0-250mmW/C

• High level - will start sequence
• Low level - will stop sequence
• Alarm level - will activate a relay output

There is also a 4 - 20 mA current loop for external monitoring. The sensor is a true two-wire device and delivers a 4 to 20 mA output signal proportional to differential pressure. The unit is calibrated at the factory. However, the offset and gain adjustments are accessible.

The zero may be adjusted with pressure ports open to atmosphere. Adjust the offset to 4mA and display will read 00.

For full scale adjustment connect accurate pressure standard of 250mmW/C to high pressure port and low pressure port open to atmosphere, adjust the gain potentiometer to 20mA display will read 250.

Tube Cleaner

To ensure the on demand cleaning function, a tube cleaner has been incorporated consisting of three air valves controlled by the processor. At power on and every hour there after two valves will close the air flow to the high and low inputs of the pressure sensor and after a short delay the third valve will open for a short time and release high pressure through the air hoses to remove any blockage. The operation of the valves are indicated by LED's on the front panel.

SPECIFICATIONS:

• Supply Voltage: 240VAC or 24VDC
• Relay Contacts 10A-250VAC/10A-30VDC
• Pressure Range 0 - 250mmW/C (approx. 0 - 2.5 KPA)
• Overpressure 20 psi
• Output Signal 4 - 20 mA 2 wire
• Accuracy 0.1% at 25deg.C
• Additional Temp.Error 0.1% per deg.C deviation from 25deg.C
• Pressure Connections 3 Bulkhead Fittings suitable for 4mm ID and 6mm OD hose

WIRING:

PROGRAMMING INSTRUCTIONS:

Press the select button to illuminate the RED LED indicator to the left of the program display. Each time the select button is pressed the next specific function LED will illuminate. Once a function has been selected, press the UP or DOWN push button to set the desired operation levels displayed on the program display. After completion press the select button to illuminate the GREEN LED indicator "RUN".
Now as all setting are locked in and the differential pressure hoses are connectet, the program display will indicate the differential pressure. To check or change a specific function just push the select button and illuminate the desired LED function. The program display will display the current value setting. In that position a change can be made and when completed push the select button to illuminate LED indicator "RUN"

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