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A chemical tank radar that works with one product is not automatically suitable for the next. A change of stored chemical can alter material compatibility, residue, foaming and the cleaning sequence even when the tank dimensions and normal level remain unchanged. Review the change before the first delivery.
Chemical Tank Radar Review Starts With the Change
Compare the old and proposed duties side by side. Record chemical identity, concentration range, contaminants, operating temperature and the fluids used to empty, flush or clean the tank. Include transitional mixtures if remnants of the previous product may remain. Do not describe a mixed service using only the main chemical name.
| Change | What to obtain | Reason to pause |
|---|---|---|
| Product | Composition and concentration across normal batches. | The existing material approval may cover a different mixture. |
| Cleaning | Agent, duration, temperature and sequence. | The most aggressive exposure may occur between production runs. |
| Residue | Expected deposits, crystals or persistent foam. | The measuring response and cleaning method may change. |
| Hardware | Actual probe, seal and connection construction. | A family name does not identify every exposed component. |
For a contact-probe installation, MV-RD702 offers covered rod or cable arrangements. Its PFA or PTFE construction must be identified in the offer along with the connection, lining and seal. A chemically suitable covering does not establish that a worn end seal or exposed fitting is acceptable.
Inspect Before the New Service Hides the Evidence
During a planned, safely isolated inspection, record the as-found condition of the covering and connection. Look for abrasion, swelling, cracking or deposits using the plant's approved inspection method. Do not cut, scrape or repair a covered probe using an improvised procedure. An unexplained damaged area needs assessment, not a new software offset.
Retain the previous configuration, but do not assume its signal processing is suitable for the new material. Agree a controlled commissioning sequence with a known liquid reference, representative filling and any foaming stage. Define what constitutes an invalid reading and how the operator will handle it before normal control resumes.
Questions During a Product Change
Q1. Is a non-contact instrument exempt from the chemical review?
No. A non-contact antenna and process seal can still encounter vapour, condensate and splashes. The review may involve fewer immersed components, but exposure has not disappeared. Check the actual installation rather than relying on the word non-contact.
Q2. Does the same chemical name justify retaining approval?
Not if concentration, impurities or cleaning conditions have changed. Ask whether the earlier approval covered the full new duty. If records are missing, treat compatibility as unconfirmed until the construction and exposure have been established.
Summary
Requalification should follow the changes in chemistry and operating sequence, not just a new product label. For a chemical-service review, provide the old and new duties, installed assembly identification and inspection findings so any necessary replacement can be specified precisely.
