PROCESS CHANGE

Displaying:

The system will constantly monitor the total amount of change in process variable since start or last reset. This change is displayable in engineering units by pushing the ‘PR CNG’ key.

This function is useful in tracking the change that has taken place in the process e.g. in a tank containing 300 gallons of water, an addition of 200 gallons will show that the total amount of water is 500 gallons. On pushing the ‘PR CNG’ key the display will indicate 200 gallons as the total change. Now assume that 400 gallons of water is pumped out. The total amount of water left in the tank would now be indicated as 100 gallons. The change that has taken place in the total volume of water from its original 300 gallons can be displayed by pushing the "PR CNG" key and it would be 200 gallons.

Resetting:

To start tracking the change from a new point, the Process change being indicated can be reset to zero . To do so, push the ‘PR CNG’ key twice and keep it pushed. The display will flash the present change value three times and then reset it to zero (keep the "PR CNG" key pushed till the display shows zero or close to zero). This flashing feature is provided so that if ‘PR CNG’ key gets pushed twice accidently while trying to display the process change it would provide a chance to get out of reset mode without actually resetting the reading. Therefore, if ‘PR CNG’ key is released any time before the three flashes, the current reading of "Process Change" will be retained.

SCALING

Scaling is useful in reading the sensor output directly in engineering units e.g. a load cell putting out 4 - 20 ma signal can be scaled to read 0 - 4000 pounds of load.

Scale is entered as two different values i.e. High Scale and low Scale. High scale corresponds to the maximum output of the transducer and low scale to low output. e.g. For a 0-5V transducer if it is desired to read 200 units at 0VDC and 3000 units at 5VDC output then set low scale equal to 200 and high scale to 3000. The DP3600 unit will linearly scale the transducer output. For a transducer with 4-20ma the low scale reading can be obtained at the programmed offset value. For instance if offset is set to 4.00, then the low scale reading will be obtained when the unit sees a 4.00ma signal from the transducer.

Scaling is obtained during setup mode and immediately follows the setting up of decimal point. Maximum programmable high scale is from 1-30000 and low scale from 0-high scale value.

Scaling can be programmed and displayed in SETUP mode only (look under setup).

OFFSET

The system provides the capability of programmable offset. This is useful if a certain amount of input from the transducer is required to read zero e.g. for a 4-20ma input , 4ma can be made to read zero.

Offset can be programmed and displayed in the SETUP mode only (look under setup).

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Omega Engineering DP3600 user manual Process Change, Offset
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DP3600 specifications

Omega Engineering has long been a trusted name in the realm of industrial instrumentation, and their DP3600 series has set a high standard in differential pressure measurement. The DP3600 is celebrated for its robustness and versatility, making it a reliable choice for a variety of applications across industries such as HVAC, water treatment, and chemical processing.

One of the standout features of the DP3600 is its advanced microprocessor-based technology. This enables highly accurate measurements and ensures that the device can effectively manage multiple pressure inputs. The DP3600 operates on a wide measurement range, accommodating both high and low differential pressure readings with exceptional precision. It is designed to handle pressures from -500 to +500 inHg, making it suitable for even the most demanding environments.

The device is characterized by its user-friendly interface, which includes a clear digital display that shows real-time readings. This feature not only enhances usability but also ensures that operators can quickly interpret data without extensive training. Furthermore, the DP3600 offers a variety of output options including analog and digital signals, allowing for seamless integration with existing systems.

Durability is another key characteristic of the DP3600. Constructed to endure harsh conditions, it boasts an IP65 rating for dust and water resistance, making it suitable for use in outdoor and high-moisture environments. The unit is also designed for easy installation and maintenance, which helps reduce downtime and operational costs.

Moreover, the DP3600 series includes built-in safety features, such as over-range protection, ensuring that the device remains operational even in extreme conditions. With options for various materials and configurations, users can customize the DP3600 to better fit their application's requirements.

In summary, the Omega Engineering DP3600 series is an advanced differential pressure device that excels in accuracy, versatility, and durability. Its microprocessor-driven capabilities, broad measurement range, and user-friendly interface make it a valuable tool for professionals seeking reliable pressure measurement solutions in challenging environments. With these features, the DP3600 continues to be a preferred choice for industries requiring precise monitoring and control of differential pressure.
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