The NEBB Professional 2024 - Quarter 3

Toolbox

By Jeff Schools

Instrument Changes for the 2025 Recertification Cycle

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OOLBOX

Each year, before recertification begins, we query the Technical Committees to identify any necessary chang es to the current discipline Required Instrumentation lists on the NEBB website. This year, there will be lan guage updates to the Cleanroom Performance Testing list. These are purely verbiage changes; no new instru mentation is required, and the existing instruments remain unchanged. CPT Option 1, Aerosol Photometer Change: • Remove "10-3" and replace it with "0.01%-100%." • Remove "over the range of 100 times the thresh old sensitivity" and replace it with "a minimum range from 10 to 90 micrograms/liter." • Remove "± 0.1 psi 0.04 psi (US)" and replace it with "of reading with a flow rate of 1 cfm." Old 2024 Verbiage: The instrument shall have a threshold sensitivity of 10-3 micrograms/liter of challenge aerosol particles and be capable of measuring concentrations over a range of 105 times the threshold sensitivity. Sample flow rate shall be 28.3 L/min (1 cfm). Readout shall be either linear with an accuracy of 1% of full scale of the selected range. ± 2% of reading ± 0.1 psi 0.04 psi (US).

New 2025 Verbiage: The instrument shall have a threshold sensitivity of 0.01%-100% of the challenge aerosol particles and be capable of measuring concentrations with a minimum range from 10 to 90 micrograms/liter. Sample flow rate shall be 28.3 L/min (1 cfm). Readout shall be lin ear with an accuracy of 1% of full scale of the selected range. ± 2% of reading with a flow rate of 28.3 L/min (1 cfm). CPT Option 1, Pneumatic Aerosol Generator Change: • Remove "thermal generator." Old 2024 Verbiage: A device that can aerosolize oil medium to serve as an artificial challenge for filter integrity testing of systems under 3,000 cfm, typically Laskin nozzle(s) type, ther mal generator, atomizer, etc. New 2025 Verbiage: A device that can aerosolize oil medium to serve as an artificial challenge for filter integrity testing of systems under 3,000 cfm, typically Laskin nozzle(s) type, at omizer, etc.

The NEBB Professional | Quarter 3 | 2024

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