The Topcon SR-3, exclusively sold and serviced in North America by Hoffman Engineering, is ideal for non-contact measurement.  Capabilities include: spectral distribution, luminance, chromaticity, and correlated color temperature.

        • High speed measurement (approx 1 sample / sec)
        • Polarization nulling optics to increase accuracy for LCD measurements
        • High sensitivity for low level measurements
        • Four acceptance angle settings ( 0.1°, 0.2°, 1°, 2°) and two close up lens options
        • Application software for PC interfacing
        • Synchronized measurement
        • Able to store up to 50 spectral acquisitions for later download to PC

Please click here for the SR-3's technical specifications.

Hoffman Engineering provides a wide variety of laboratory equipment for both photometric and radiometric needs. Our systems are engineered to read precise photometric or radiometric measurements.

PCO-2000 with a 1980A photometer head

The PCO-2000 provides for a fully automated data acquisition from the 1980A photometer head without the need for the original system console. The original photometric head is utilized without any modifications. The existing 21 pin photometer connector plugs directly into the PCO-2000 data acquisition card for easy installation.

By replacing the original control console, the photometer system becomes more reliable and versatile. The user retains a tried and proven photometer with the addition of a state-of-the-art computerized data acquisition system and specialized software to manipulate the acquired data.

The PCO-2000 software allows for storage of all correction factors needed to fully utilize the photometer in all filter and aperture positions. Data from the PCO-2000 may be exported to other software applications for further data analysis. The system allows for user self calibration while retaining the original Hoffman Engineering calibration defaults.

Two easy to install interface cards furnished by Hoffman Engineering make up the heart of the PCO-2000 system. These consist of a 16-bit, high speed data acquisition card, and a proprietary six range digital photometer card with a built in PMT high voltage power supply. Also included with the PCO-2000 are all the cables necessary for operation, PCO-2000 custom software and initial colormetric and photometric system calibrations. All calibrations are NIST traceable and in compliance with both Hoffman Engineering Laboratory and ISO 10012-1.

Features:

• 16 Bit, Auto Ranging data acquisition

• Integrated high voltage power supply. (350-1200 volts) Software adjustable.

• Six range amplifier. Range A - E plus Auto Range and high speed oscilloscope range F.

• Automated computer detection of all filter, aperture and switch positions

• Colormetric output display as CIE x,y and u',v' with graphing capabilities of measured coordinates

• Photometric units which may be displayed with appropriate lens accessories are Footlamberts, Cd/m˛, Footcandles, Lux, Candelas or Lumens.

• User calibration mode. This feature allows the customer to specify which lenses will be used and generate calibration factors with a NIST Traceable Standard.

• On-Line Help screens.

• Automatic photo multiplier tube protection. This feature will alert the user of excessive signal level and set the high voltage power to a safe default voltage.

• Windows® based PCO-2000 system software compatible with Microsoft Windows® 95

System Requirements:

• Customer furnished, fully operational 1980A photometer head. The photometer head may have any combination of filters/aperture options offered by the OEM.
• Customer furnished PC utilizing an Intel® 80486 of higher microprocessor with two open, full length, unobstructed EISA slots with two free IRQ's.
• Microsoft Windows® 95
• Math-coprocessor
• SVGA of higher monitor resolution
• Minimum 4MB RAM
• 10MB hard disk space

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Last modified: June 08, 2002