PR-680L

Overview

The PR-680L SpectraDuo is an ultra high sensitivity variant of the PR-680. It marks the beginning of a new era in light measurement. This unique patent pending, battery powered portable instrument is the first and only combined fast-scanning 256 detector element spectroradiometer and PMT based photometer on the market. The PR-680L has three available operating modes

  1. A fast scanning spectroradiometer (like the PR-670)
  2. A highly sensitive photometer (like the PR-810)
  3. Auto Select mode which automatically selects between detectors based on the available signal.

The PR-680L is supplied with 4 Automated Measuring Apertures (1°, 0.5°, 0.25° and 0.125°) and an Automated Measure Shutter. Other hardware features include AutoSync® for automatically synchronizing to the source refresh rate insuring the utmost accuracy, a Secure Digital (SD) port for measurement storage, an External Trigger port allowing remote measurement activation from either a push button or peripheral device, and a long lasting rechargeable Lithium-Ion (Li-Ion) battery.

The minimum sensitivity in the photometer mode is 0.00024 cd/m², 14 times more sensitive than even the PR-680.

Features

Easy to Use

The PR-680L is controlled via the on-board, 57 x 75 mm high resolution, full colour touch screen LCD display and 5-way navigation keypad for easy navigation. Following a measurement, the PR-680L displays data and colour spectral graphs on the system display. The PR-680L design provides stand alone operation - no PC required. The PR-680L can also be controlled via the world famous SpectraWin™ 2 software over the USB or Bluetooth interface.

Flexibility
 
The unique design of the PR-680L makes tasks such as spectrally based colourimetry and high speed, low level luminance - required for display metrology - possible with a single instrument by supplying a wide dynamic range - 0.00024 cd/m² (photometer and 1° aperture) to 17,000,000 cd/m² (spectral and 1/8° aperture) without using external neutral density filters. Since the Pritchard® viewing and measuring optics are shared by both detectors, tests can be performed without requiring realignment.

The optional analog output provides the capability of using the PR-680L as a high speed optical input (PMT signal) to a device such as an oscilloscope. The bandwidth is approximately 20 µsecs. Useful for tasks such as ON/OFF or gray level response time for LCD's. Includes a connector on the PR-680L and interconnecting cable.

We've further enhanced the flexibility of the spectral measurements by adding 2 sensitivity modes (Standard & Extended) and 4 measurement speeds : Normal, Fast, 2X Fast, 4X Fast.

For applications other than luminance the PR-680L can be supplied with optical accessories such as a cosine receptor for illuminance, LR-127 LED Analyzer for testing LED's to CIE 127, fibre probe for remote non-line-of-sight testing, and a series of magnification lenses for small spot size analysis. The PR-680L also provides the capability for interactive display white point calibration (RGB software).

Connectivity
 
It's easy for the PR-680L to talk to the outside world - it comes equipped with USB and (optional) Bluetooth® wireless interfaces. It is supplied with text based, Remote Mode syntax and a driver that emulates an RS-232 interface (COM: port) making it a simple task to generate custom programming to perform specific tasks or for inclusion in an ATE environment. If needed, an RS-232 interface can be added to complement the standard USB.


Manufactured by Photo Research

Specifications

Detectors

256 linear array and PMT

Inter-detector Alignment Error

0%

Spectroradiometer Wavelength Range

380 to 780 nm

Optics

Pritchard viewing and measuring system

Digital Resolution

16 bits

Filters

Trimmed Photopic
Automated ND-1 (0.1 transmission) for PMT (optional)

Spectral Resolution

1.56 nm / pixel

Spectral Bandwidth

8 nm (5 nm optional)

Spectral Accuracy

± 1 nm

Luminance Range

0.00024 - 17,000,000 cd/m²

Liminance Accuracy
(Against NIST luminance standard -Illuminant A)

± 2% *

Luminance Precision

≤ 1% *

Colour Accuracy
(for Illuminant A)

±0.0015 * in CIE 1931 x,y

Measurement Capabilities

Luminance, Illuminance, luminous intensity, chromaticity, correlated colour temperature

AutoSync Range

20 to 400 Hz

Analog Output Response Time

3 µsecs (optional)

Measurement Time

6 ms to 30 secs

Battery

Rechargeable Lithium-ion. (≥ 12 hours continuous operation)

Weight

1.8 kg

Operating Temperature

1° to 35° C

† Sensitivities are for 10:1 signal to RMS noise against an Illuminant A based NIST traceable luminance standard
* Luminance level of 1 cd/m² for the Array and 0.007 cd/m² for the PMT with the 1° aperture and an Illuminant A based NIST traceable luminance standard.

PR 680L Field Coverage (mm)

 

 

Accessory

Working Distance


Aperture

1/2°
Aperture

1/4°
Aperture

1/8°
Aperture

MS-75

355 mm
to
305 m

5.25
to
5320

2.63
to
2660

1.32
to
1330  

0.658
to
655

SL-0.5X

91.4 mm
to
137 mm

1.50
to
2.54

0.75
to
1.27

0.375
to
0.635

0.188
to
0.318

SL-1X

46 mm
to
66 mm

0.89
to
1.32

0.445
to
0.660

0.226
to
0.330

0.111
to
0.165

MS-2.5X

46 mm

0.51

0.225 

0.128

0.064

MS-5X

28 mm

0.289

0.145  

0.072

0.036

MS-7.5

100 mm
to
30.5 m

24.76
to
5320

12.83
to
1320

6.19
to
1330

3.10
to
665

LA-680

Contact

13.2mm 

N/A

N/A

N/A

FP-680

Contact

3.17m 

N/A

N/A

N/A

PR-680L Minimum Photometric Sensitivity (cd/m²)

Accessory

Detector

1° Aperture

1/2° Aperture

1/4° Aperture

1/8° Aperture

MS-75

Spectral
PMT

0.069
0.00024

0.27
0.0010

1.10
0.0038

4.4
0.015

SL-0.5X

Spectral
PMT

0.069
0.00024

0.27
0.0010 

1.10
0.0038

4.4
0.015

SL-1X

Spectral
PMT

0.069
0.00024

0.27
0.0010

1.10
0.0038

4.4
0.015

MS-2.5X

Spectral
PMT

0.17
0.00060

0.69
0.0024

2.7
0.010

11
0.038

MS-5X

Spectral
PMT

0.27
0.0010

1.1
0.0038

4.4
0.015

17.5
0.061

MS-7.5

Spectral
PMT

0.069
0.00024

0.27
0.0010

1.10
0.0038

4.4
0.015

LA-680

Spectral
PMT

0.069
0.00024

0.27
0.0010

1.10
0.0038

4.4
0.015

FP-680

Spectral
PMT

0.17
0.0007

N/A

N/A

N/A

CR-680

Spectral
PMT

0.43 lux
0.0015 lux

N/A

N/A

N/A

Schematics

PR-680L Schematic
PR-680L Schematic