Photo Research, Inc. - PR-1500 Spotmeter

PR-1500 Spotmeter

Photo Research spotmeters are the standard of the industry.. select the model best suited to your needs.

Over four decades ago, PhotoResearch invented "spot" photometry when it introduced the Spectra Screen Brightness Meter for the motion picture industry. A few years later, a military customer inquired about measuring aircraft instrument panels and Photo Research produced the first Spectra Spotmeter microphotometer

The PR-1500 Spotmeter is a sensitive, versatile photomultiplier-tube photometer that can measure luminance(photometric brightness) at any distance from 1¾ inches (44 mm) to infinity without the need for accessory lenses or changes in calibration. The PR-1600 SpectraSpot, a silicon-cell photometer/radio meter, is designed for applications requiring the inherent stability and near infrared response of the silicon cell, without requiring the higher sensitivity of photo multiplier tubes.

Typical applications

Display measurements

Cathode ray tube luminance

MIL-SPEC Lighting compliance

Street and Roadway lighting

Aircraft Panel Checkout

Material Reflectance Studies

Automotive Lighting

Color Temperature Determination

Airport lighting

Air pollution monitoring

Lamp quantity control

Photomultiplier tubes

The standard photomultiplier phototube supplied has an S-20 response. These are specially selected and seasoned low-noise photodetectors.

Filter Turret

A 6-position filter turret is located the aperture mirror and the photomultiplier detector. This turret contains the "photopic" filter which modifies the spectral response of the instrument to precisely match CIE or "human eye" response. This photopic filter is individual trimmed and calibrated for each SpotMeter. With this filter in position the Spot meter functions as a precision luminance photometer(photometric brightness meter).

Red and blue filters are included in standard instruments for relative tristimulus and color temperature measurements. (If special filters, such as red LED or scotopic response filters are installed, tristimulus and/or color temperature measurements capability is not available) Option 32 provides three individually trimmed colorimetric filters for red, blue and photopic making the PR-1500 a more accurate relative colorimeter. The filter turret has an OPEN position for use in making relative radiometric measurements. An internal calibration-reference source is mounted in the CAL position of the turret for quickly checking the instrument calibration prior to making a measurement.

USB Connectivity Option

We've made it easier to get data from the PR-1500 into the computer environment.

We now offer an optional Universal Serial Bus (USB) connectivity. This feature can be ordered with a new instrument, or retrofitted to existing instruments (must be returned to factory for retrofitting).

The USB enables all the capabilities of the BCD and more. The customer has a choice of ordering USB, BCD or both. Information returned from the USB bus is the DPM reading, exponent and sign, and CIE filter turret position.

We're also including a software installation CD, and fully documented sample software source code in C++, Visual Basic and LabView to make it easy for user integration.

PR-1500 SpotMeter Lens Selection and Field Coverage Chart

Objective Lens	Focusing Range	Working Distance	Aperture Size
Objective Lens	Focusing Range	Working Distance	3°	1°	½°	¼°	1/8°	½° x 1½°	1/8° x 1½°
MS-55*	1.75 in. to infinity (45 mm to infinity)	10 ft. (3.05 m)	6.30 in. (160 mm)	2.10 in. (53.3 mm)	1.05 in. (26.7 mm)	0.53 in. (13.5mm)	0.26in. (6.6 mm)	1.05 in. x 3.15 in. (26.7 mm x 80 mm)	0.26 in. x 3.15 in. (6.6 mm x 80 mm)
MS-1X	Fixed	3.80 ft. ( 96.5 m.)	0.114 in. (2.90 mm.)	0.038 in. (0.97 mm.)	0.019 in. (0.48 mm.)	0.010 in. (0.24 mm.)	0.005 in. (0.12 mm.)	0.019 in. x 0.057 in. (0.48 mm. x1.44 mm.)	0.005 in. x 0.057 in. (0.127 mm. x1.44 mm.)
MS-165	Fixed	6.5 in. ( 165 mm.)	0.114 in. (2.90 mm.)	0.038 in. (0.97 mm.)	0.019 in. (0.48 mm.)	0.010 in. (0.24 mm.)	0.005 in. (0.12 mm.)	0.019 in. x 0.057 in. (0.48 mm. x1.44 mm.)	0.005 in. x 0.057 in. (0.127 mm. x1.44 mm.)
MS-2.5X	Fixed	1.76 in. (44.7 mm.)	0.046 in. (1.16 mm.)	0.015 in. (0.38 mm.)	0.008 in. (0.19 mm.)	0.004 in. (0.10 mm.)	0.002 in. (0.048 mm.)	0.008 in. x 0.023 in. (0.203 mm. x 0.584 mm.)	0.002 in. x 0.023 in. (0.048 mm. x 0.58 mm.)
MS-77	Fixed	4.25 in. (108 mm.)	0.038 in. (0.97 mm.)	0.013 in. (0.32 mm.)	0.006 in. (0.16 mm.)	0.003 in. (0.080 mm.)	0.002 in. (0.04 mm.)	0.006 in. x 0.02 in. (0.16 mm. x 0.48 mm.)	0.002 in. x 0.019 in. (0.04 mm. x 0.48 mm.)
MS-5X	Fixed	1.11 in. (28.2 mm.)	0.024 in. (0.58 mm.)	0.008 in. (0.19 mm.)	0.004 in. (0.10 mm.)	0.002 in. (0.048 mm.)	0.001 in. (0.024 mm.)	0.004 in. x 0.012 in. (0.10 mm. x 0.30 mm.)	0.0001 in. x 0.012 in. (0.024 mm. x 0.30 mm.)
MS-7X	Fixed	0.7 in. (17.8 mm.)	0.015 in. (0.43 mm.)	0.005 in. (0.14 mm.)	0.003 in. (0.069 mm.)	0.001 in. (0.034 mm.)	0.0007 in. (0.017 mm.)	0.003 in. x 0.008 in. (0.069 mm. 0.21 x mm.)	0.0007 in. x 0.008 in. (0.015 mm. x 0.21 mm.)
MS-10X	Fixed	0.6 in. (15.2 mm.)	0.011 in. (0.28 mm.)	0.004 in. (0.10 mm.)	0.002 in. (0.048 mm.)	0.001 in. (0.024 mm.)	0.0005 in. (0.012 mm.)	0.002 in. x 0.006 in. (0.048 mm. x 0.14 mm.)	0.0005 in. x 0.006 in. (0.013 mm. x 0.14 mm.)
MS-25X	Fixed	0.6 in. (15.2 mm.)	0.0045 in. (0.12 mm.)	0.0015 in. (0.039 mm.)	0.0008 in. (0.020 mm.)	0.0004 in. (0.010 mm.)	0.0002 in. (0.005 mm.)	0.0008 in. x 0.002 in. (0.020 mm. x 0.068 mm.)	0.0002 in. x 0.002 in. (0.005 mm. x 0.058 mm.)
MS-50X	Fixed	0.3 in. (7.6 mm.)	0.002 in. (0.051 mm.)	0.0008 in. (0.019 mm.)	0.0004 in. (0.010 mm.)	0.0002 in. (0.005 mm.)	0.0001 in. (0.002 mm.)	0.0004 in. x 0.001 in. (0.010 mm. x 0.029 mm.)	0.0001 in. x 0.0001 in. (0.002 mm. x mm.)
MS-55 with 12mm extension	Fixed	1.34 in. (34.0 mm.)	0.093 in. (2.36 mm.)	0.031 in. (0.79 mm.)	0.016 in. (0.41 mm.)	0.008 in. (0.20 mm.)	0.004 in. (0.10 mm.)	0.016 in. x 0.047 in. (0.41mm. x 1.19 mm.)	0.004 in. x 0.047 in. (0.10 mm. x 1.19 mm.)
MS-55 with 20mm extension	Fixed	1.15 in. (29.2 mm.)	0.084 in. (2.13 mm.)	0.028 in. (0.71 mm.)	0.014 in. (0.36 mm.)	0.007 in. (0.18 mm.)	0.004 in. (0.10 mm.)	0.014 in. x 0.042 in. (0.36 mm. x 1.07 mm.)	0.004 in. x 0.042 in. (0.10 mm. x 1.07 mm.)
MS-55 with 36mm extension	Fixed	0.88 in. (22.4 mm.)	in.0.069 (1.75 mm.)	0.023 in. (0.58 mm.)	0.012 in. (0.30 mm.)	0.006 in. (0.15 mm.)	0.003 in. (0.076 mm.)	0.012 in. x 0.034 in. (0.30 mm. x 0.88 mm.)	0.003 in. x 0.035 in. (0.076 mm. x 0.86 mm.)
MS-55 with 68mm extension	Fixed	0.54 in. (13.7mm.)	0.051 in. (1.30 mm.)	0.017 in. (0.43 mm.)	0.008 in. (0.20 mm.)	0.004 in. (0.10 mm.)	0.002 in. (0.051 mm.)	0.008 in. x 0.026 in. (0.20 mm. x 0.66 mm.)	0.002 in. x 0.026 in. (0.051 mm. x 0.66 mm.)

NOTES:

Field coverage is proportional to distance at distances greater than 5ft. At 1.75 inches, field coverage equals MS-1X field coverage

Full-Scale Sensitivity Chart

Accessory	Units	Aperture
Accessory	Units	1°	½°
MS-55 MS-1X MS-165 MS-2.5X MS-77 MS-5X MS-7X MS-10X WL-16 ZL-16	footLamberts = fL Option 52-0	10^-2 to 10⁺²	10^-1 to 10⁺³
	microwatts per steradian/square centimeter mw.sr^-1.cm^-2Option 52-0	10^-2 to 10⁺²	10^-1 to 2x10⁺³
	candelas per square meter cd.m^-2Options 52-1	10^-1 to 10⁺³	10⁰ to 10⁺⁴
	mw.sr^-1.cm^-2Option 52-1	10^-1 to 10⁺³	10⁰ to 10⁺⁴
MS-25X MS-50X FP-16	fL	10^-1 to 10⁺³	10⁰ to 10⁺⁴
	mw.sr^-1.cm^-2Option 52-0	10⁰ to 10⁺⁴	10⁺¹ to 2x10⁺⁵
	cd.m^-2	10⁰ to 10⁺⁴	10⁺¹ to 10⁺⁵
	mw.sr^-1.cm^-2	10⁺¹ to 10⁺⁵	10⁺² to 10⁺⁶
CR-100	footcandles = fc-Opt.52-0 (lux = lx-Opt.52-1)	10^-1 to 10⁺³(10⁺¹ to 10⁺⁵)	10⁰ to 10⁺⁴(10⁺² to 10⁺⁶)
IB-16	fc (lx)	10^-6 to 10^-2(10^-4 to 10⁰)	10^-5 to 10^-1(10^-3 to 10⁺¹)
LR-16	millicandelas - Opt.52-0 (millicandelas - Opt.52-1)	10⁺¹ to 10⁺⁵(10⁺² to 10⁺⁶)	10⁺² to 10⁺⁶(10⁺³ to 10⁺⁷)

Specifications

Measuring Field Apertures	Specify either ½° or 1° aperture (see Lens Selection and Field Coverage Chart)
Sensitivity Range	(see Full-Scale Sensitivity Chart)
Field Coverage	see Lens Selection and Field Coverage Chart
Viewing field	Bright, erect 9.2° viewing field with 6X viewing magnification. (16.6° with optional 3° circular aperture)
Eyepiece	Large(22mm) diameter focusing eyepiece with rubber cap.
Standard Objective Lens	MS-55(55mm, f/2.8) MacroSpectar lens. Focuses from 1¾ in.(44mm) to infinity.
Spectral Response(Unfiltered)	375-1,100 nm
Calibration	Traceable to NIST. Standard luminance calibration units are footLamberts but calibration in "candelas per square meter" is available upon request. Radiometric calibration is in microwatts per steradian per square meter.
Response speed	From 10 microseconds (on least sensitive range) to 200 milliseconds (on most sensitive range)
Absolute accuracy	(includes uncertainty of NIST standards) ±4% for photometric measurements(of a black body source); ±10% for radiometric measurements
Relative accuracy	(repeatability) ±1% per month; ±2%per year
Operator Controls	Power, Sensitivity and Response Speed switches - plus potentiometers for zeroing the amplifier and zeroing the dark current - are located on the back control panel. Two knobs on the side control panel are for filter selection and insertion of a viewing shutter.
Meter Hold	Push button on back panel allows transient meter readings to be retained for inspection.
Readout Indicators	A 3½ digit, no-blinking digital readout has an illuminated Multiplier Indicator
Output signals	All models have a 0-2 volt analog output jack, capable of driving any analog device whose impedance is greater than 10,000 ohms. In addition, all models can be provided with a BCD output jack (Option 54)
Operating Temperature	32°F to 110°F(0°C to 43°C)
Power Requirements	117 volts, ±13 volts, 50 to 400Hz, 5 watts maximum; 230 volts, ±40 volts available on request.
Size and weight	12½ in. (31.3 cm) x 6¼ in. (15.9 cm) x 5¾ in.(14.6 cm). Weight is 8½ pounds(3.9 kg)

In this page
	Typical Applications

	Lens Selection/Field Coverage Chart

	Sensitivity Chart

	Specifications

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* NEW * USB Connectivity Option