The conveyors, processing tools, equipment and machines usually have a thin layer of flour, which makes it very hard to pass ATP test. They (conveyors, processing tools, equipments and machiens) must be dry cleaned by manual cleaning method using clean rags. This dry cleaning method requires a lot of labor.
The materials are plastic, stainless steels and standard blue conveyor belts
There are no absolute ATP specifications for "Surfaces". "Experts/instruments/surfaces" vary.
If you are determined to rely solely on ATP, a Generic Procedure is detailed in several previous threads here, eg -
(1) Determine the surface condition which in your opinion is visually acceptable (in the absence of recommended/supportive micro. data) and can be routinely achieved.
(2) Perform (as IIRC published by Hygiena) 5 runs and measure ATP on the appropriate surface.
(3) Apply a [simple] statistical formula to calculate the PASS/FAIL criteria.) (detailed method/calculation is attached in an earlier Post).
(Presumably if the result is not remotely in the same ballpark as manufacturer suggested values for your instrument, something, eg eyesight/technique, is probably defective).
Edited by Charles.C, 27 December 2022 - 01:19 PM.