Apogee Instruments SU-300-SS Bedienungsanleitung

APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA

TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM

OWNER’S MANUAL

ULTRAVIOLET INDEX &

ULTRAVIOLET-B SENSOR

Models SU-300-SS

Rev: 5-Jan-2023

TABLE OF CONTENTS 
Owner’s Manual ............................................................................................................................................................................... 1 
Certificates of Compliance ....................................................................................................................................................... 3 
Introduction ............................................................................................................................................................................. 5 
Sensor Models ......................................................................................................................................................................... 6 
Specifications ........................................................................................................................................................................... 7 
Deployment and Installation.................................................................................................................................................. 10 
Cable Connectors................................................................................................................................................................... 11 
Operation and Measurement ................................................................................................................................................ 12 
Maintenance and Recalibration............................................................................................................................................. 16 
Troubleshooting and Customer Support................................................................................................................................ 17 
Return and Warranty Policy................................................................................................................................................... 18 
 

CERTIFICATE OF COMPLIANCE

EU Declaration of Conformity

This declaration of conformity is issued under the sole responsibility of the manufacturer:

Apogee Instruments, Inc.

721 W 1800 N

Logan, Utah 84321

USA

for the following product(s):

Models: SU-300

Type: Ultraviolet Index and Ultraviolet-B Sensor

The object of the declaration described above is in conformity with the relevant Union harmonization legislation:

2014/30/EU Electromagnetic Compatibility (EMC) Directive

2011/65/EU Restriction of Hazardous Substances (RoHS 2) Directive

2015/863/EU Amending Annex II to Directive 2011/65/EU (RoHS 3)

Standards referenced during compliance assessment:

EN 61326-1:2013 Electrical equipment for measurement, control, and laboratory use –EMC requirements

EN 63000:2018 Technical documentation for the assessment of electrical and electronic products with

respect to the restriction of hazardous substances

Please be advised that based on the information available to us from our raw material suppliers, the products

manufactured by us do not contain, as intentional additives, any of the restricted materials including lead (see

note below), mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), polybrominated

diphenyls (PBDE), bis (2-ethylhexyl) phthalate (DEHP), butyl benzyl phthalate (BBP), dibutyl phthalate (DBP), and

diisobutyl phthalate (DIBP). However, please note that articles containing greater than 0.1 % lead concentration

are RoHS 3 compliant using exemption 6c.

Further note that Apogee Instruments does not specifically run any analysis on our raw materials or end products

for the presence of these substances, but we rely on the information provided to us by our material suppliers.

Signed for and on behalf of:

Apogee Instruments, January 2023

Bruce Bugbee

President

Apogee Instruments, Inc.

CERTIFICATE OF COMPLIANCE

UK Declaration of Conformity

This declaration of conformity is issued under the sole responsibility of the manufacturer:

Apogee Instruments, Inc.

721 W 1800 N

Logan, Utah 84321

USA

for the following product(s):

Models: SU-300

Type: Ultraviolet Index and Ultraviolet-B Sensor

The object of the declaration described above is in conformity with the relevant UK Statutory Instruments and

their amendments:

2016 No. 1091 The Electromagnetic Compatibility Regulations 2016

2012 No. 3032 The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic

Equipment Regulations 2012

Standards referenced during compliance assessment:

BS EN 61326-1:2013 Electrical equipment for measurement, control, and laboratory use –EMC requirements

BS EN 63000:2018 Technical documentation for the assessment of electrical and electronic products with

respect to the restriction of hazardous substances

Please be advised that based on the information available to us from our raw material suppliers, the products

manufactured by us do not contain, as intentional additives, any of the restricted materials including lead (see

note below), mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), polybrominated

diphenyls (PBDE), bis (2-ethylhexyl) phthalate (DEHP), butyl benzyl phthalate (BBP), dibutyl phthalate (DBP), and

diisobutyl phthalate (DIBP). However, please note that articles containing greater than 0.1 % lead concentration

are RoHS 3 compliant using exemption 6c.

Further note that Apogee Instruments does not specifically run any analysis on our raw materials or end products

for the presence of these substances, but we rely on the information provided to us by our material suppliers.

Signed for and on behalf of:

Apogee Instruments, January 2023

Bruce Bugbee

President

Apogee Instruments, Inc.

INTRODUCTION

Ultraviolet (UV) radiation constitutes a portion of the electromagnetic spectrum from 100 to 400 nm and is further

subdivided into three wavelength ranges: UV-A (315 to 400 nm), UV-B (280 to 315 nm), and UV-C (100 to 280 nm).

Much of the UV-B and all the UV-C wavelengths from the sun are absorbed by Earth’s atmosphere. There are also

multiple artificial UV light sources available.

Most UV sensors designed for sunlight measurements are sensitive to UV radiation in the UV-A or UV-B ranges.

Apogee Instruments SU-300 series UV-I/UV-B sensors detect UV radiation from 270 to 315 nm and are calibrated

to output UV Index measurements. UV Index is a relative metric that scales linearly with the intensity of UV

radiation that causes sunburn in humans. Measured UV Index can be converted to energy flux density units of

watts per square meter (W m-2, equal to Joules per second per square meter) or photon flux density units of

micromoles per square meter per second (µmol m-2 s-1).

Typical applications of UV-I/UV-B sensors include incoming UV radiation measurement in outdoor environments,

aimed at informing people of potential for UV exposure and sunburn, or in laboratory use with artificial light

sources (e.g., germicidal lamps).

Apogee Instruments SU-300 series UV-I/UV-B sensors consist of a sintered quartz diffuser, photodiode, and signal

processing circuitry mounted in an anodized aluminum housing and a cable to connect the sensor to a

measurement device. SU-300 sensors are designed for continuous UV-I/UV-B radiation measurement in indoor or

outdoor environments. The SU-300 series outputs an analog voltage that is directly proportional to UV-I/UV-B

radiation incident on a planar surface (does not have to be horizontal) where the radiation emanates from all

angles of a hemisphere.

The model number and serial number are located on

the bottom of the sensor. If manufacturing date of a

sensor is required, please contact Apogee Instruments

with the serial number of the sensor.

SENSOR MODELS

This manual covers the unamplified model SU-300 UV-I/UV-B sensor (listed below in bold). Additional models are

covered in their respective manuals.

Model

Signal

SU-300

0-2 mV

SU-321

SDI-12

SPECIFICATIONS

Calibration Traceability

Apogee UV-I/UV-B series sensors are calibrated through side-by-side comparison to the mean of four transfer

standard UV-I/UV-B sensors under sunlight. The transfer standard UV-I/UV-B sensors are calibrated through side-

by-side comparison to an Apogee model PS-300 spectroradiometer under sunlight (clear sky conditions) in Logan,

Utah. The PS-300 is calibrated with a quartz halogen lamp traceable to the National Institute of Standards and

Technology (NIST).

SU-300-SS

Power Supply

Self-Powered

Output (sensitivity)

0.1 mV per UV Index unit

Calibration Factor (reciprocal of

sensitivity)

10 UV Index units per mV

Calibration Uncertainty

± 10 %

Output Range

0 to 2 mV

Measurement Range

0 to 20 UV Index

Measurement Repeatability

Less than 0.5 %

Long-term Drift

Less than 2 % per year

Non-linearity

Less than 1 %

Response Time

Less than 1 ms

Field of View

180°

Spectral Range

270 to 315 nm (wavelengths where response is greater than 50 % of maximum; see Spectral

Response graph below)

Directional (Cosine) Response

± 2 % at 45°, ± 5 % at 75°

Temperature Response

Less than 0.1 % per C

Operating Environment

-30 to 85 C; 0 to 100 % relative humidity

Dimension

30.5 mm diameter, 37 mm height

Mass (5 m of cable)

140 g

Cable

5 m of shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability,

flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector located

25 cm from sensor head

Cosine Response

Cosine Response Graph

-10

-8

-6

-4

-2

010 20 30 40 50 60 70 80 90

Difference [%]

Solar Zenith Angle [°]

Directional, or cosine, response is

defined as the measurement error at

a specific angle of radiation incidence.

Directional error for Apogee SU-300

series UV-I/UV-B sensors is

approximately ± 2 % and ± 5 % at solar

zenith angles of 45° and 75°,

respectively.

Mean cosine response of four

Apogee UV-I/UV-B sensors. Cosine

response was calculated as the

relative difference of UV-I/UV-B

sensors from a reference UV-I/UV-B

sensor deployed outdoors. These

data are the average of the AM and

PM response.

Spectral Response

0.0001

0.0010

0.0100

0.1000

1.0000

10.0000

240 260 280 300 320 340 360 380 400

Relative Response

Wavelength [nm]

Spectral response estimate

of Apogee SU-300 UV-I/UV-B

sensors. Spectral response

was modeled from sensitivity

of the photodetector and

transmittance of the

diffuser. Gray line is the

Erythemal Action Spectrum

and provides a relative

indication of skin damage

caused by UV radiation.

DEPLOYMENT AND INSTALLATION

Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure UV-I/UV-B

incident on a horizontal surface, the sensor must be level. An Apogee Instruments model AL-100 Leveling Plate is

recommended to level the sensor when used on a flat surface or being mounted to surfaces such as wood. To

facilitate mounting on a mast or pipe, the Apogee Instruments model AL-120 Solar Mounting Bracket with Leveling

Plate is recommended.

To minimize azimuth error, the sensor should be mounted with the cable pointing toward true north in the

northern hemisphere or true south in the southern hemisphere. Azimuth error is typically less than 1 %, but it is

easy to minimize by proper cable orientation.

In addition to orienting the cable to point toward the nearest pole, the sensor should also be mounted such that

obstructions (e.g., weather station tripod/tower or other instrumentation) do not shade the sensor. Once

mounted, the black cap should be removed from the sensor. The black cap can be used as a protective covering

for the sensor when it is not in use.

Nylon Screw: 10-32x3/8

Model AL-100

Nylon Screw: 10-32x3/8

Model AL-120

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