IHP24 auto calibration feature
How the advanced auto calibration feature works
During installation, the IHP24 can perform an automatic calibration once initiated by the operator. The positioner will then open and close the valve, collect response data, and carry out calibration based on the valve’s opening/closing time and overall valve signature. This function works with all types of modulating valve systems – independent of valve size or actuator type.
Key benefits of auto calibration
The auto calibration feature comes as standard on all IHP24 devices.
No valve data sheets required
Automatic calibration removes the need for detailed valve documentation, reducing preparation time and minimizing the risk of input errors.
Faster commissioning
Setup time is reduced, ensuring a quicker and more efficient start-up of the control loop.
Extended solenoid valve lifetime
By only activating the solenoid valves, when necessary, wear is reduced, resulting in longer service intervals and fewer replacements.
Reduced mechanical and environmental impact
Optimized control minimizes unnecessary valve movement, lowering energy consumption and mechanical stress on the valve.
Stable control without hunting
Accurate calibration prevents oscillation, delivering smoother operation, improved process stability, and higher reliability.
Positioner deadband
The deadband can be manually adjusted from the user menu of the IHP24. During auto calibration the standard adjustment is 1% but this value can be changed from 0.1 to 10% depending on the specific valve system.
If the deadband is set to e.g. 1% the positioner will regulate with a setpoint accuracy of +/- 1% and stay there until the position feedback is bigger than 1%.
The provided example has a deadband of 1%. Which means that the position won't go above 51% or below 49%.