How to Measure Semi-Cylindrical Illuminance On Site: LUX-100D-C vs LUX-100D-F
Summary: Field Esc measurement hinges on height, orientation, avoiding self-shadowing, and the correct receptor. This guide covers typical sidewalk/plaza practice and LUX-100D-C vs LUX-100D-F selection.
Height
CJJ 45 / JGJ/T 163 commonly use 1.5 m above pavement/ground. Some healthy-lighting protocols use ~1.2 m (seated) / 1.5 m (standing).
Procedure
- Tripod + spirit level.
- Aim the semi-cylinder according to the required viewing direction.
- Keep the operator out of the optical path.
- Log stable readings; keep geometry consistent across the grid.
Selection
LUX-100D-C for Esc compliance; LUX-100D-F for full cylindrical / spatial illuminance; LUX-100D for horizontal Eh only. Solution: cylindrical illuminance solution.
FAQ
Q: LUX-100D-C vs LUX-100D-F?
A: LUX-100D-C for Esc compliance; LUX-100D-F for full cylindrical surround; LUX-100D for horizontal Eh only. Do not use LUX-100D-F as a substitute for a quantum sensor measuring PPFD.
Q: Is a large Esc change after 180° rotation normal?
A: Yes—the semi-cylinder is oriented; front vs back can differ greatly. Record the standard viewing direction in the report.
Q: What does LuxPartner do and on which platforms?
A: Android app plus Windows/Linux desktop; Bluetooth or USB serial; live reading, uniformity grids, integral/timed logging, PDF reports, session sharing across devices.
