Define what the measurement must establish
An RF shielding effectiveness test is meaningful only when the requirement, measurement method, test locations and reporting rules are agreed before mobilization. A generic statement that an enclosure “passes IEEE 299” is not a substitute for project-specific acceptance criteria. This checklist helps security teams, general contractors and facility representatives assemble the information needed for an executable field test plan.
1. Governing requirement and acceptance authority
- Identify the contract, security construction criteria, drawings and specifications that establish the shielding requirement.
- Identify the applicable test-method standard and edition, including any project modifications.
- Provide the required shielding-effectiveness values by frequency or frequency band, with units and pass/fail rules.
- Identify who approves the scope, witnesses testing, reviews exceptions and makes the final acceptance decision.
- Confirm whether testing is construction quality verification, investigation, contractual acceptance evidence or part of an authority-directed security evaluation.
IEEE 299 describes shielding effectiveness measurement methods; it does not, by itself, establish a universal performance requirement for every SCIF or SAPF. Likewise, RF shielding measurements are not equivalent to a TEMPEST evaluation or a CTTA determination. For that distinction, see RF shielding, TEMPEST and CTTA requirements.
2. Enclosure definition and test coverage
- Provide floor plans, elevations and a clearly identified shielding boundary.
- List shielded doors, frames, windows, seams, floor/wall/ceiling transitions and modular interfaces.
- Identify cable, conduit, pipe, duct and other penetrations, along with any filters or waveguide-beyond-cutoff assemblies.
- Confirm the number of rooms or enclosures, access restrictions, and areas obstructed by permanent equipment.
- Identify project-defined locations requiring detailed examination or repeat measurements.
Small discontinuities can dominate leakage. A plan that specifies only broad wall locations may overlook doors, transitions and penetrations where installation quality is particularly important. See doors, seams and penetrations.
3. Measurement feasibility and readiness
- Confirm that the shielding envelope and all permanent interfaces are complete.
- Identify equipment, furnishings, energized systems or operating conditions that affect access or the electromagnetic environment.
- Verify availability of safe access on both sides of each test boundary.
- Clarify which frequencies, antenna arrangements and measurement locations are practical in the installed geometry.
- Plan how instrument noise floor, ambient signals and measurement dynamic range will be handled and reported.
- Document any limitations before the test rather than silently treating unmeasured locations as compliant.
Field geometry, nearby emitters and the measurement chain can limit what a test can demonstrate. Results should distinguish confirmed performance, detectable leakage and measurements constrained by the available dynamic range. Review the IEEE 299 measurement overview.
4. Access, coordination and information handling
- Identify the site escort, safety representative, construction contact and authority representative.
- Confirm hours, outage windows, permits, lifts and other access provisions.
- Agree which drawings, photographs, coordinates and findings may appear in the report.
- Establish an approved channel for sensitive project records; do not upload classified information through a public web form.
- Agree how discrepancies will be logged and who authorizes repair and retesting.
5. Expected deliverables
- Test plan identifying criteria, method, frequency coverage and designated interfaces.
- Measurement record with equipment identification, relevant calibration information and test conditions.
- Results associated with physical locations, acceptance thresholds and any measurement limitations.
- Clearly described exceptions and recommended investigation or retest scope.
- Final report suitable for the designated review process, without implying that the testing contractor grants accreditation.
Before you request a proposal
At minimum, provide the project location, construction status, approximate enclosure dimensions, required frequency-dependent performance, governing documents and desired test window. If the specification is still being developed, note that explicitly: scope development and acceptance testing are different stages.
Request acoustic or RF field testing using unclassified project information only. SCIF Testing is a specialized service of On-Site Acoustic Testing, LLC.