Datasheet summary
Memosens Wave CKI50
Engineering summary from PDF text extraction for Memosens Wave CKI50. Verify every value with the OEM datasheet.
Summary
Product Identification
- Product Name: Memosens Wave CKI50
- Product Type: Process spectrometer for the measurement of color
- Manufacturer: Endress+Hauser
- Document ID: TI01431C/07/EN/02.23-00
- Part Number: 71625469
- Publication Date: 2023-08-10
Application
The Memosens Wave CKI50 is an in-line process spectrometer used for analyzing liquids via VIS spectroscopy to detect and measure color, color variations, or color accuracy.
Benefits
- Integrated data models and methods
- Simple process integration with process connection
- Adaptable to process conditions, including hygienic environments
- In-line measurements in real time
- Robust design for industrial use
Function and System Design
Measuring Principle
The spectrometer uses optical signals to analyze the liquid. Light is passed through the sample, and the transmitted light is collected and analyzed to determine measurement parameters. The principle is based on the Lambert-Beer law, which describes a linear dependency between light absorption and the concentration of the absorbing substance:
A = -log₁₀ (I/I₀) = ε . c . OPL
Where:
- A = Absorption
- I = Intensity of received light at detector
- I₀ = Intensity of transmitted light of light source
- ε = Extinction coefficient
- c = Concentration
- OPL = Optical path length
Measuring System Components
A complete measuring system includes:
- Process spectrometer CKI50
- Liquiline CM44P transmitter
- Process connection Varivent N DN50 - 125 with an immersion depth of 68 mm (2.7 in)
Communication and Data Processing
The CKI50 utilizes Memosens technology for digital sensor communication with a Memosens-enabled transmitter. This technology allows for:
- Storage of sensor data in the sensor itself (manufacturer data, serial number, order code, calibration data, operating data, etc.).
- Automatic transfer of sensor data to the transmitter upon connection.
- Independent calibration of the sensor in a lab.
- Quick and easy replacement of pre-calibrated sensors.
- Predictive maintenance capabilities based on sensor history.
- Digital data transmission via a non-contact connection, ensuring interference immunity and data security.
- Automatic error messages for sensor failure or connection interruption.
Input
Measured Variable
The device measures color using the CIE L*a*b* color space, defined by the International Commission of Illumination:
- L* (lightness axis): Specified operational range: 0 to 100
- a* (green-red axis): Specified operational range: –150 to 100
- b* (yellow-blue axis): Specified operational range: –100 to 150
Measuring Range
- Wavelength: Halogen wavelength range from 380 to 830 nm
- CIE L*a*b*:
- L*: 0 to 100
- a*: -150 to 100
- b*: -100 to 150
Electrical Connection
The device connects via its fixed cable to the plug-in terminals of a transmitter input. The cable length is 15 m (49.2 ft).
Performance Characteristics
Reference Conditions
- Temperature: 25 °C (77 °F)
- Pressure: 1013 hPa (15 psi)
- Heat-up time: 5 hours
Repeatability
| Measured Variable | Specified Operational Range | Repeatability |
|---|---|---|
| L* | 0 to 100 | < 0.1 % of the span of the specified range¹⁾ |
| a* | -150 to 100 | < 0.1 % of the span of the specified range¹⁾ |
| b* | -100 to 150 | < 0.1 % of the span of the specified range¹⁾ |
¹⁾ Measured according to DIN ISO 15839 with liquid color solutions.
Long-Term Reliability (Drift per 24h)
| Measured Variable | Specified Operational Range | Drift per 24h |
|---|---|---|
| L* | 0 to 100 | < 0.03 % of the span of the specified range¹⁾ |
| a* | -150 to 100 | < 0.03 % of the span of the specified range¹⁾ |
| b* | -100 to 150 | < 0.03 % of the span of the specified range¹⁾ |
¹⁾ Measured according to DIN ISO 15839 with liquid color solutions. Regular referencing helps compensate for drift.
Mounting
Orientation
The device must be aligned so that the medium flows through the measurement gap. Installation markings on the process connection indicate the correct alignment following the flow direction. It is recommended to install in an ascending pipe. A minimum distance of 1 m (3.28 ft) from pipe bends is advised due to potential turbulence.
Installation Instructions
- Install in an easily accessible location.
- Install upstream from pressure regulators.
- Install in areas with uniform flow and low vibration.
- Avoid locations with potential for air collection, foam formation, or settling of suspended particles.
- Ensure the measurement gap is rinsed by the medium flow.
- Install for in-process cleaning.
Environment
- Ambient Temperature Range: –20 to 45 °C (–4 to 113 °F)
- Storage Temperature: –20 to 70 °C (–4 to 158 °F)
- Degree of Protection: IP 69, NEMA 6P
- Electromagnetic Compatibility (EMC): According to EN 61326-1, EN 61326-2-3, and NAMUR NE21.
Process
- Process Temperature Range:
- –20 to 60 °C (–4 to 140 °F)
- 60 to 140 °C (140 to 284 °F) with water cooling. Note: Operation above 60 °C (140 °F) requires cooling to prevent permanent damage.
- Process Pressure Range: 0.5 to 10 bar (7.3 to 145 psi) (absolute)
- Flow Limit: No minimum flow required. For media prone to deposits, ensure sufficient mixing.
- Recommended Flow for Cooling: 10 l/h (2.64 gal/h)
- Recommended Coolant Inlet Temperature: 20 °C (68 °F)
- Coolant Pressure: Maximum 2 bar (29 psi)
Mechanical Construction
Design and Dimensions
The measurement gap is available in three widths: 2 mm (0.08 in), 5 mm (0.2 in), and 10 mm (0.4 in). Detailed dimensions are provided in the document's figures.
Weight
Approximately 7.9 kg (17.4 lb) with a 15 m (49.2 ft) cable and clamp.
Materials
- Materials in Contact with Medium:
- Measuring Head: 1.4404/AISI 316L
- Window: Sapphire
- O-rings: FFKM
- Gasket Seal: PEEK
- Materials Not in Contact with Medium:
- Housing: 1.4404/AISI 316L
- Process Connections: Varivent N DN50 - 125, immersion depth 68 mm (2.7 in)
Certificates and Approvals
- CE Mark: Complies with EU directives.
- Ex-approval: ATEX, IECEx, UKEx (II 1/2G Ex ia op is/db [ia Ga] IIC T6...T3 Ga/Gb)
- Hygienic Compatibility: 3-A Standard, FDA compliant materials, EHEDG certified cleanability (Type EL Class 1), Regulation EC 1935/2004 compliant.
- ADI-free: No animal-derived materials or ingredients used in wetted parts.
Order Information
Scope of Delivery
- 1 Process spectrometer (version as ordered)
- 1 USB stick
- 1 Operating Instructions
- Safety instructions for hazardous areas (if applicable)
Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.