How to install and wire the Yokogawa FLXA402T turbidity and chlorine liquid analyzer?

After power on: Check that the LCD display screen starts normally, there are no fault alarms (such as sensors not connected or wiring errors), and communication and analog output signals are normal.

2. Regular maintenance

Daily inspection: Check the panel sealing and cable sealing sleeve for integrity and no moisture intrusion every week;

Regular maintenance: Check the grounding resistance (≤ 100 Ω), fuse status, and clean the casing every 6 months (using a soft cloth and prohibiting the use of corrosive solvents);

Accessory replacement: Fragile parts such as fuses (A1633EF) and rubber seals (K9334CN) require Yokogawa certified accessories, and power off operation is required during replacement.

3. Fault handling prompts

If there is a communication failure, check whether the RS-485/Ethernet wiring and terminal resistance are correct;

When simulating abnormal output, check the load resistance (≤ 600 Ω), whether the wiring is loose, or calibrate the output through the converter menu;

When the sensor is unresponsive, confirm that the sensor cable shield is grounded and the terminal wiring corresponds, and refer to the sensor manual to troubleshoot the sensor itself.

Key precautions

Safety regulations: All wiring must be powered off, power cables must comply with UL 2556 VW-1 or equivalent flame retardant rating, and protective grounding wires cannot be omitted;

Anti interference: Analog signals, digital communication, and power cables need to be wired separately, shielded cables should be grounded at one end (analyzer side), and avoid parallel laying with strong electrical cables;

Modular maintenance: Only authorized personnel from Yokogawa can perform module repairs/replacements (such as pH module K9704EB, SC module K9704FB). Unauthorized operations will result in loss of warranty eligibility;

Environmental protection: For outdoor installation, it is necessary to confirm that the sunshade/conduit is properly adapted to prevent rainwater and corrosive gases from entering and extend the service life of the equipment.