1、 Core component maintenance strategy

1. Maintenance of electrodes and sensors

Regular cleaning and inspection

If impurities (such as dust and electrolyte residue) adhere to the electrode surface, it will affect the accuracy of signal acquisition. It is necessary to wipe the electrode surface with anhydrous ethanol every month to remove the oxide layer or pollutants.

Check if the electrode connection wire is loose or aged, and replace the cable promptly if it is found to have broken skin or poor contact (it is recommended to use shielded wire to reduce electromagnetic interference).

Anti corrosion treatment

If used in corrosive media (such as strong acid and alkali environments), the electrode material should be made of corrosion-resistant materials (such as titanium alloy, platinum iridium alloy) and regularly coated with anti-corrosion coatings (such as polytetrafluoroethylene).

2. Maintenance of data collection system

Dust prevention and heat dissipation of circuit boards

The accumulation of dust inside the chassis can cause poor heat dissipation of the circuit board. It is recommended to use compressed air to blow the motherboard, power board and other components every quarter to ensure that the cooling fan is not blocked (replace the fan in a timely manner when the fan speed is abnormal).

In high temperature environments, heat sinks or temperature controlled fans can be installed to maintain a temperature of ≤ 40 ℃ inside the chassis (exceeding 50 ℃ may accelerate chip aging).

Maintenance of signal amplifier

Regularly calibrate the amplifier gain (recommended every six months) to avoid gain drift affecting data accuracy after long-term use; If you notice an increase in noise, check if the capacitor is leaking and replace the aging components in a timely manner.

2、 Environmental Control and Protection

1. Temperature, humidity, and electromagnetic interference control

Work environment requirements

Temperature: It is recommended to control it within 15 ℃~30 ℃, with a temperature difference fluctuation of ≤ 5 ℃/h (sudden temperature changes may cause thermal expansion and contraction of sensor components, affecting contact accuracy).

Humidity: Relative humidity ≤ 60%. A humid environment can easily cause the circuit board to become damp. Moisture proofing agents can be placed inside the chassis or dehumidifiers can be installed.

Electromagnetic shielding measures

Avoid strong electromagnetic sources (such as motors and transformers) within 1 meter around the equipment. Signal cables should be threaded through metal bellows and grounded to reduce the impact of electromagnetic interference on imaging quality.

2. Anti vibration and mechanical protection

Installation and fixing requirements

The equipment needs to be installed on a flat and vibration free platform (vibration frequency greater than 50Hz may cause electrode displacement), and if necessary, shock-absorbing pads or brackets should be added.

If the sensor array is used for dynamic measurement (such as pipeline fluid monitoring), it is necessary to ensure that the pipeline is firmly fixed to avoid electrode loosening caused by fluid impact.

3、 Operating standards and usage management

1. Optimization of startup and shutdown processes

Correct power on/off sequence

Power on: First connect the sensor power supply, then start the data acquisition system, preheat for 30 minutes to reach a stable state of the device (avoid frequent power on/off, the interval between each shutdown should be ≥ 10 minutes).

Shutdown: First, shut down the acquisition software, and then cut off the hardware power to prevent momentary current surges from damaging the circuit.

2. Load and range control

Avoid overloading operation

When measuring, ensure that the conductivity of the medium is within the range of the equipment (such as the nominal range of the equipment being 0~1000S/m, do not use it for over range media). Overloading may cause electrode heating or amplifier damage.

Regular calibration and calibration

Quarterly use standard resistors for system calibration (such as 100 Ω, 1k Ω, 10k Ω standard resistors) to verify measurement accuracy. If the deviation exceeds ± 1%, the circuit parameters need to be recalibrated.

The core of extending the lifespan of electrical resistance tomography imaging equipment lies in the principle of "prevention first, combined prevention and control": reducing hardware loss through standardized operation, lowering aging rate through environmental control, and eliminating potential faults in advance through regular maintenance. If the device encounters problems that cannot be solved by itself (such as abnormal fluctuations in imaging data or hardware errors), it is recommended to contact the manufacturer's technical support to avoid blind disassembly and secondary damage. According to the above maintenance strategy, the service life of the equipment can be extended to 8-10 years (under standard operating conditions).