CLD18 Conductivity Meter Spare Parts Overview
The CLD18 is a commonly used conductivity measurement instrument in industrial process analysis, and its long-term stable operation depends on original spare parts and calibration solutions. This article summarizes the common spare part order numbers and technical specifications for the CLD18, and focuses on the selection and usage points of calibration solutions, helping engineering technicians and procurement personnel quickly complete spare parts planning and maintenance work.
All spare parts are listed by function, including three major categories: housings, electronic modules, and calibration solutions. It is recommended to stock up in advance according to on-site working conditions and maintenance cycles to avoid measurement interruptions caused by spare parts shortages.
CLD18 Spare Parts Order Numbers and Specifications
Housings and Electronic Modules
Housing spare parts are used to replace housing failures caused by corrosion, mechanical damage, or aging, while electronic modules involve IO-Link communication upgrades and complete electronic box replacement. The table below lists the relevant order numbers and specification descriptions.
| Order Number | Specification Description |
|---|---|
| 71228583 | CLD18 upper plastic housing |
| 71228584 | CLD18 upper stainless steel housing |
| 71526057 | Kit CLD18 Electronic box IO complete |
| 71526058 | Kit CLD18 Upgrade IO-Link |
When selecting a housing, material compatibility must be considered: plastic housings are suitable for general environments, while stainless steel housings are more suitable for corrosive atmospheres or high hygiene level occasions. The IO-Link upgrade kit can upgrade traditional analog output to digital communication, improving data integration capabilities.
Calibration Solutions
Calibration solutions are used for qualified calibration of conductivity measurement systems. All calibration solutions are traceable to NIST Standard Reference Materials (SRM) and come with temperature compensation tables, complying with ISO-related requirements. Each bottle has a capacity of 500 ml, with a reference temperature of 25°C.
| Order Number | Calibration Solution Conductivity Value | Capacity | Reference Temperature | Traceability and Compliance |
|---|---|---|---|---|
| 50081902 | 74.0 µS/cm | 500 ml | 25°C | NIST SRM, with temperature table, ISO compliant |
| 50081903 | Not specified (to be confirmed) | 500 ml | 25°C | NIST SRM, with temperature table, ISO compliant |
| 50081904 | 1.406 mS/cm | 500 ml | 25°C | NIST SRM, with temperature table, ISO compliant |
| 50081905 | Not specified (to be confirmed) | 500 ml | 25°C | NIST SRM, with temperature table, ISO compliant |
| 50081906 | Not specified (to be confirmed) | 500 ml | 25°C | NIST SRM, with temperature table, ISO compliant |
Note: Some calibration solution order numbers do not have clearly marked conductivity values in the original document. When selecting, be sure to confirm the specific value with the supplier to ensure it matches the measurement range.
Key Points for Calibration Solution Selection
Correctly selecting a calibration solution is key to ensuring conductivity measurement accuracy. The following points can help you make a reasonable choice based on the application scenario.
- Measurement range matching: For low conductivity (such as pure water), use 74.0 µS/cm calibration solution; for medium and high conductivity, use 1.406 mS/cm or higher value calibration solution.
- Temperature compensation: All calibration solutions provide temperature compensation tables. During calibration, corrections must be made according to the actual temperature lookup table to ensure calibration accuracy.
- Traceability requirements: If ISO or GMP compliance is required, NIST SRM traceable calibration solutions should be selected, and certificates should be retained.
- Shelf life and storage: Calibration solutions should be stored sealed and protected from light, and used as soon as possible after opening to avoid contamination causing conductivity value drift.
Spare Parts Replacement and Calibration Steps
The following steps are applicable to housing replacement, electronic module upgrades, and daily calibration operations, for reference by maintenance personnel.
- Disconnect the instrument power supply to ensure safe operation.
- Remove the old housing or electronic module, and record the wiring method.
- Install the new spare part, restore connections according to the original wiring, and ensure good sealing.
- After power-on, check the instrument self-test status, and perform parameter configuration if necessary.
- Use the corresponding calibration solution for calibration: immerse the electrode in the calibration solution, wait for the temperature to stabilize, and complete calibration according to the instrument prompts.
- After calibration is complete, rinse the electrode with deionized water, and verify whether the measurement value is within the allowable error range.
If performing an IO-Link upgrade, device identification and parameter download must also be carried out through the IO-Link master or configuration tool. For details, refer to the relevant communication manual.
Common Problems and Maintenance Recommendations
To extend the service life of the CLD18, it is recommended to regularly check housing sealing, electrode contamination, and calibration solution shelf life. The following are common problems and handling recommendations.
- Measurement value drift: First check whether the electrode is contaminated, and recalibrate; if drift persists, consider replacing the electronic module.
- Communication failure: Check the IO-Link connection and configuration, and replace the upgrade kit if necessary.
- Housing corrosion: Replace with a stainless steel housing according to the environment, and strengthen protection.
It is recommended to perform calibration every 3-6 months and record calibration data to trace changes in instrument performance.