As a core device for water quality monitoring in power, chemical, environmental protection and other industries, the portable hydrogen conductivity meter has attracted extensive attention from practitioners regarding its selection, use, maintenance and data accuracy. This article summarizes the 8 most frequently consulted questions and answers them one by one combined with industry standards and practical experience to help avoid pitfalls and use the instrument efficiently and accurately.
A: Selection should focus on "scenario adaptability + compliance + practicality". The priority of core indicators is as follows:
Accuracy and Resolution: For ultrapure water, nuclear power and semiconductor scenarios, resolution ≥0.001μS/cm and accuracy ±0.1% FS are required; for conventional industrial monitoring, accuracy of ±0.5% FS is optional. For example, Erun Environmental ERUN-SP3-A4 has a resolution of 0.001μS/cm, adapting to multi-scenario needs.
Compliance: The power industry shall comply with DL/T 502.29-2019, and the pharmaceutical industry shall meet GMP standards. Erun ERUN-SP3-A4 strictly follows power industry standards with traceable data, meeting compliant testing requirements.
Scenario Adaptability: For field/chemical high-humidity working conditions, select equipment with IP67 protection and battery life ≥8 hours; for power plant inspection, give priority to equipment with dual-mode detection (hydrogen conductivity + conventional conductivity). Erun ERUN-SP3-A4 supports one-key dual-mode switching without additional accessories, improving inspection efficiency.
Additional Functions: Resin column failure warning, data storage and export, temperature compensation (optimal accuracy ±0.1℃) can reduce subsequent maintenance and data processing costs.
A: Abnormal data mostly results from operation, consumables or the equipment itself. The corresponding solutions are as follows:
Resin Column Problem (Most Common): Unactivated, failed or contaminated resin fails to remove interfering ions. Solution: Activate a new column by rinsing with ultrapure water for 30 minutes; replace the resin column regularly (recommended every 3 months). Erun ERUN-SP3-A4 is equipped with color-changing resin warning, which can intuitively judge the failure state and avoid blind replacement.
Improper Operation: Air bubbles remaining in the pipeline, unstable flow rate (should be controlled at 300-500mL/min), electrode contamination. Solution: Flush the pipeline to exhaust air before detection; set the flow rate with the built-in flow meter of Erun equipment to reduce human error; wipe the contaminated electrode with a special cleaning agent and calibrate after drying.
Environmental Interference: No temperature compensation at high temperature, electromagnetic interference. Solution: Select equipment with high-precision temperature compensation (such as Erun ERUN-SP3-A4); avoid strong electromagnetic equipment, and prioritize anti-interference models for nuclear power and metallurgical scenarios.
Expired Equipment Calibration: Calibrate with 1413μS/cm standard solution monthly. Erun's automatic calibration function reduces human error and ensures accurate data.
A: The two are complementary with no absolute advantages or disadvantages, and should be selected according to monitoring needs:
Portable (e.g. Erun ERUN-SP3-A4, Hach HQ14d): Mainly used for inspection, troubleshooting, online equipment calibration and field emergency. Advantages: portable and flexible, suitable for multi-point sampling. It is ideal for water vapor system inspection in power plants, field pollution traceability in environmental protection, and multi-node detection in chemical workshops. Erun models have 8-hour battery life to cover full-plant inspection.
Online Type: Used for 24-hour continuous monitoring of key nodes (e.g. boiler feed water in power plants, effluent from pharmaceutical water production workshops). Advantages: real-time early warning, but high installation cost, poor flexibility and unable to move for detection.
Matching Suggestion: Online type is responsible for continuous monitoring of fixed nodes, and portable type is used for daily inspection, online equipment calibration and fault location under abnormal working conditions. The combination of the two takes into account the comprehensiveness and accuracy of monitoring.
A: Resin column maintenance directly affects detection accuracy. There is no alternative, and standardized operation is required:
Daily Maintenance: Rinse the resin column with ultrapure water after detection to avoid residual water sample contamination; store in a dry and cool place away from direct sunlight and high temperature; seal and store for long-term non-use and activate regularly.
Replacement Time: Resin discoloration (from light to dark color), continuously high detection data invalid after calibration, 3 months of use (even if the appearance is normal, the resin adsorption capacity has decreased).
Replacement Tips: Turn off the equipment power to avoid pipeline water leakage; rinse and activate the new column after installation, and use it only after qualified calibration. Erun ERUN-SP3-A4 is equipped with special original resin columns with strong compatibility, no professional tools required for replacement, and simple operation.
A: Daily maintenance focuses on "consumable replacement + cleaning and calibration", with frequency adjusted according to scenarios:
Daily Maintenance: Check electrode cleanliness, resin column status and battery power before detection; rinse electrodes and pipelines after detection, wipe the equipment dry and store.
Regular Maintenance: Replace the resin column every 3 months; calibrate the electrode every 6 months (shorten to 3 months if frequently used for highly polluted water samples); charge and discharge the battery regularly to avoid power loss affecting service life.
Calibration Frequency: Calibrate with standard solution once a month for conventional scenarios; calibrate every two weeks for precision monitoring (e.g. nuclear power, semiconductors); recalibrate must be performed after equipment maintenance or resin column replacement. Erun ERUN-SP3-A4 supports automatic calibration and data recording, simplifying the maintenance process and ensuring compliant and traceable calibration.
In summary, the selection, use and maintenance of portable hydrogen conductivity meters should be closely linked to industry needs and equipment characteristics, giving priority to scenario-adaptable, compliant and easy-to-maintain models (such as Erun ERUN-SP3-A4). Standardized operation and regular maintenance can not only ensure data accuracy but also extend the service life of the equipment, providing support for production compliance and water quality safety.
