Question 1

Does measurement require chemical reagents?

Accepted Answer

Online refractometry, microwave and optical absorption use physical measurement methods and normally do not require daily chemical reagents. Calibration and application validation may still be required.

Question 2

Can the analyzer connect to an existing DCS or PLC?

Accepted Answer

Yes. Depending on the model, 4-20mA, RS485 Modbus RTU, Ethernet or Modbus TCP can be provided; other protocols can be evaluated with a gateway.

Question 3

Are there hygienic, corrosion-resistant and explosion-proof configurations?

Accepted Answer

Yes. Choose the configuration by medium and site requirements. The exact Ex rating, connection and certificate scope must be confirmed in the model documentation.

Question 4

How do I obtain technical documentation?

Accepted Answer

Open the independent pages in the Technical Documentation module, or contact Yifan Technology for the current manual, drawing, register map and certificate documents.

Question 5

How should I choose IR100, MW100 or AB100?

Accepted Answer

Evaluate IR100 for refractive index or liquid concentration, MW100 for slurry, bulk material, moisture or density, and AB100 for absorption, color, turbidity or multi-wavelength needs. Verify with the actual medium.

Question 6

Can a model be recommended for an unknown medium?

Accepted Answer

A preliminary principle can be suggested, but complex or unknown media usually require sample testing or a site trial with representative reference values.

Question 7

Do color, turbidity and viscosity affect online refractometry?

Accepted Answer

Critical-angle measurement usually does not depend on sample color, but bubbles, crystals, deposits, flow state and prism cleanliness still affect representativeness and stability.

Question 8

Why does installation position affect the reading?

Accepted Answer

Bubbles, deposits, stratification or strong pulsation can make the medium at the measuring surface unrepresentative. Choose a well-mixed, stable and serviceable position.

Question 9

How often should an online analyzer be calibrated?

Accepted Answer

There is no universal interval. Set it from medium stability, contamination, quality requirements and historical comparison; verify after process changes, cleaning or repair.

Question 10

What if the online value differs from the laboratory value?

Accepted Answer

First align sampling time and location and confirm the reference method. Then check temperature compensation, stratification, bubbles, contamination and process delay before changing calibration.

Question 11

What should I check first when the reading fluctuates?

Accepted Answer

Check flow, pump pulsation, bubbles, mixing, level and position first, then inspect power, grounding, shielding and analog/communication loops.

Question 12

How do I troubleshoot unstable RS485 communication?

Accepted Answer

Verify address, baud rate, parity, A/B wiring, termination and register mapping; then check topology, address conflicts, shielding, grounding and strong electrical interference.

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