LM 20 Luminance Meter – For testing automotive license plates

The LM 20 has been specially developed for measuring the luminance of lighting for automotive license plates (number plates). The instrument is generally used for automated measurements with an AMS Goniophotometer.

LM 20 luminance meter

The photometer focuses precisely on a measuring field of 25 mm diameter at a distance of 3.162 m. An LED alignment device was developed to project the measuring field on the license plate dummy.

The DSP 10 Preamplifier of the LM 20 is connected to the AMS Controller which displays the luminance in cd/m². The measuring optics is either mounted on a stable tripod or on the TPU 10 photometer positioning unit which offers particularly user-friendly operation of the test setup.

Features

  • Display range up to 1,000,000 cd/m² with a resolution of 0.02 cd/m² in the most sensitive measuring range
  • CAN Bus provides connection to AMS Goniophotometer; display of measured values directly at the AMS Controller
  • LED alignment device facilitates targeting on measuring points
  • Special measuring optics for suppressing stray light and extraneous light
  • Installation on a stable tripod or TPU 10 positioning unit

Ordering information

Order number Product description
PM-DSP10-204 Luminance meter comprising PMH 200 luminance measuring head with thermostatic stabilization, measuring optics and stray light tube with integrated LED alignment device, DSP 10 Preamplifier and CAN Bus interface, CAN Bus cable 5 m, with DSP 10 mounting plate for tripod or TPU 10 positioning unit
PM-ST-300 Alignment jig for stray light tube (for fine adjustment at the mounting position)
PM-ST-310Tripod for stray light tube, incl. mounting kit; for 900 mm height of the optical axis
PM-ST-311Tripod for stray light tube, incl. mounting kit; for 1200 mm height of the optical axis
PM-ST-312Tripod for stray light tube, incl. mounting kit; for 1400 mm height of the optical axis
PM-ST-313Tripod for stray light tube, incl. mounting kit; for 1500 mm height of the optical axis
PM-ST-330 Extension arm for additional stray light tube on the same tripod
AMS-310 Holder for mounting license plate dummies and license plate illumination (comprising 2 mounting parts) in conjunction with PMH 200 and a goniometer for luminance measurements
AMS-311 License plate dummies for measurement in conformity with ECE-R4 (3 dummies, type A, B, C)
AMS-312 License plate dummies for measurement in conformity with SAE-J587 (2 dummies, type 01, 02 (motorcycle))
AMS-313 License plate dummies for measurement in conformity with the Chinese standard (3 dummies)

Applications

  • High-precision luminance meter specially designed for license plate lighting
  • ECE R4 and SAE J587 standards, GB and comparable standards