7.19 STCompVesselType ObjectType Definition

The STCompVesselType provides relevant variables and parameters for controlling and monitoring a vessel component of a cleaning and pretreatment machine and is formally defined in Table 51.

Monitoring represents a collection of variables that are not assigned to a component but to the overall system.

The components of the STCompVesselType have additional references which are defined in Table 52.

HeatingPower represents the measured or calculated actual electric real power consumption of a component used for a heating task. Suggested unit: kW.

CoolingPower represents the measured or calculated actual electric real power consumption of a component used for a cooling task. Suggested unit: kW.

DryerPower represents the measured or calculated actual electric real power consumption of a component used for a drying task. Suggested unit: kW.

Temperature represents the measured or calculated actual temperature. Suggested unit: °C.

phValue represents the measured actual value of pH as a measure of the level of alkalinity or acidity of the process fluids, related to neutralisation staged or pH-controlled pretreatment stages, but a poor indication for cleaner concentration. Suggested unit: pH.

AlkalinityFree represents the measured or calculated actual free alkalinity by titration with strong acid to an endpoint of approx. pH 8 (pH indicator phenolphtalein) to determine strong alkalines, for concentration monitoring of highly alkaline cleaners. Suggested unit: points.

AlkalinityTotal represents the measured or calculated actual total alkalinity by titration with strong acid to an endpoint of approx. pH 4 (pH indicator methyl orange or bromocresol green) to determine all alkalines including pH buffers, for concentration monitoring of alkaline cleaners. Suggested unit: points.

AcidityFree represents the measured or calculated actual free acidity by titration with strong alkali to an endpoint of approx. pH 4 (pH indicator methyl orange or bromocresol green) to determine strong acids, for concentration monitoring of highly acidic cleaners. Suggested unit: points.

AcidityTotal represents the measured or calculated actual total acidity by titration with strong alkali to an endpoint of approx. pH 8 (pH indicator phenolphtalein) to determine all acids including buffers, for concentration monitoring of acidic cleaners. Suggested unit: points.

Conductivity represents the measured or calculated actual electrolytic conductance as temperature-dependent sum parameter for water quality in rinsing water or builder concentration related salt content in cleaning stage. Suggested unit: µS/cm.

ParticleCountClassXLiquid is a placeholder to represent the measured or calculated number of particles of a specified size class (Size Class X) in liquid of the rinsing or cleaning stage in relation to a reference volume as specified by VDA 19/ISO 16232. This parameter can be re-used for each Size Class required for evaluation. Suggested unit: -.

TotalOrganicCarbon (TOC) refers to the amount of carbon found in organic compounds within a water sample. It is a key parameter used to measure water quality, indicating the presence of natural or synthetic organic. substances. TOC analysis is commonly used in environmental monitoring, water treatment, and industrial processes to ensure compliance with quality standards. Suggested unit: ppb.

CleaningAgentConcentration refers to the amount of active cleaning substance present in a solution, typically expressed as a percentage or ratio. It is a critical parameter to ensure optimal cleaning performance while avoiding excessive use of chemicals, maintaining efficiency, and protecting surfaces or equipment. Suggested unit: %.

BuilderConcentration refers to the amount of builder compounds in a cleaning solution, which are added to enhance the cleaning effectiveness by softening water, stabilizing pH, or improving soil removal. Maintaining the correct builder concentration is essential for achieving optimal cleaning results and ensuring chemical efficiency. Suggested unit: %.

SurfactantConcentration refers to the amount of surface-active agents present in a cleaning solution, which reduce surface tension to enhance wetting, spreading, and soil removal. Proper surfactant concentration is essential for effective cleaning performance and minimizing environmental impact. Suggested unit: %.

CorrosionProtectionConcentration refers to the amount of corrosion-inhibiting agents in a solution, designed to protect metals and materials from rust and degradation. Ensuring the correct concentration is vital for maintaining long-term durability and performance of equipment and components. Suggested unit: %.

FillLevel refers to the amount of liquid or material present in a container, measured as a percentage of its total capacity. Accurate monitoring of the fill level is essential for efficient process control and preventing overflows or shortages. Suggested unit: %

FillLevelDiscrete represents the fill level as configurable discrete states (e.g. Empty, Low, Medium, High, Full), used where the level is reported as distinct steps rather than a continuous percentage. MultiStateDiscreteSignalType is defined in OPC 30081.

ChamberPressure refers to the internal pressure within a sealed chamber, often monitored to ensure proper operation of equipment or processes. Maintaining the correct chamber pressure is critical for safety, efficiency, and achieving desired outcomes in applications such as manufacturing or testing. Suggested unit: mbar.

UltrasonicPower is the electrical power with which the ultrasonic transducers in an ultrasonic bath are driven - the input power. It is an important parameter for the quality of a cleaning process to ensure proper operation and quality. Suggested unit: W.

UltrasonicFrequency refers to the acoustic frequency with which ultrasonic transducers are driven in a cleaning bath. The ultrasonic frequency is an important parameter for the quality of a cleaning process to ensure proper operation and quality. Suggested unit: Hz.

CavitationIntensity is defined by the power density of cavitation i.e. the cavitation energy in unit time and unit space. Cavitation intensity depends on ultrasonic power and frequency and is essential for the proper operation of a cleaning process. High cavitation intensity results in transient cavitation i.e. bubble collapses. Suggested unit: Pa.

LevelCavitationNoise (LCNF) is defined as a noise level caused by cavitating bubbles. This noise level can be determined with a hydrophone according to IEC TS 63001. LevelCavitationNoise can be used for qualification of ultrasonic devices giving information on the existence, the strength and the distribution of transient cavitation as a parameter for the cleaning performance of an ultrasonic tank. Suggested unit: dB.

FluorescenceLiquid represents the measured fluorescence intensity of the bath liquid in relation to excitation power as a measure of the bath cleanliness level regarding organic contaminants (oils, cooling lubes, release agents). Typically an aggregated characteristic output e.g. an average of multiple points sampled across the surface or functional areas. Suggested unit: - or RFU (relative fluorescence units).

QualityIndexLiquid represents the calculated Index Score of the quality-determining parameters of the bath liquid. Suggested unit: -.

ParticleWeightLiquid describes the amount of solids in the bath, determined by the weight of particles remaining in a filter in relation to a reference volume. Suggested unit: mg/l.

VolatileResidualsLiquid describes the proportion of volatile components in the bath. Suggested unit: %.

OilContaminantConcentration relative proportion of contaminant oil in the bath in relation to a reference volume. Suggested unit: %.

NonVolatileResidualsLiquid describes the proportion of non-volatile components in the bath. Suggested unit: %.