Technical Specifications

Power Supply: -24VDC (range - 17.5VDC to - 26VDC)

Input: Compatible with 7200 series 5mm/8mm eddy current probes, dual-channel independent acquisition

Measurement Range: Standard 0–2mm (customizable), Sensitivity 3.94V/mm (100mV/mil)

Output: 4–20mA analog quantity, two relays for alarm contacts (warning / danger)

Accuracy: Linear error ≤ ±5%, repeatability ≤ 0.1%

Environment: Operating temperature - 20℃ to 60℃, storage - 40℃ to 85℃, dust-proof and shock-proof

Installation: Standard 35mm rail-mounted, installation in cabinet

Installation and Wiring

Installation: Snap onto the standard rail of the cabinet, keep away from strong electromagnetic interference sources such as frequency converters and high-power motors; separate the sensing wire and power wire, with a spacing of ≥ 300mm.

Wiring:

Power: Connect to the power terminal and ensure reliable grounding.

Probe: Connect two eddy current probes to CH1 and CH2 signal terminals respectively, with the shielding layer grounded at one end.

Output: Connect to the central control system, and connect the alarm contacts to the interlock circuit.

Calibration: After power-on, calibrate the probe gap (standard 1.27mm, corresponding voltage 10V ± 0.2V), set the alarm / danger threshold.

Maintenance and Care

Daily: Check if the casing is undamaged and free of dust, observe that the display value is stable, and there are no abnormal fluctuations.

Regularly: Tighten the wiring terminals quarterly, check if the insulation layer of the cables is not aged or damaged; calibrate the measurement accuracy and alarm action reliability every six months.

Prohibited: Do not plug or unplug the probe cables while powered on, avoid static interference; do not operate in high-temperature and humid environments.

Storage: When idle, place it in a dry and ventilated environment, temperature - 40℃ to 85℃, moisture-proof and dust-proof. Fault diagnosis

No display / No signal: Check if the power supply is normal and if the fuse has blown; Check if the probe cables are broken, short-circuited or connected incorrectly; Replace the spare module to confirm if it is a hardware fault.

Value fluctuation / Large deviation: Check if the installation gap of the probe is compliant and if the fixation is loose; Check for external electromagnetic interference, and ensure that the cable shielding and grounding are good.

Alarm malfunction / Inaction: Verify if the alarm threshold setting is correct; Check if the relay contacts are oxidized or stuck; Test the stability of the probe signal, and calibrate or replace the probe if necessary.