Apogee Instruments SU-202 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-A SENSOR

Models SU-202 and SU-205

(including SS models)

TABLE OF CONTENTS

Owner’s Manual ............................................................................................................................................................................... 1

Certificate of Compliance......................................................................................................................................................... 3

Introduction ............................................................................................................................................................................. 4

Sensor Models ......................................................................................................................................................................... 5

Specifications ........................................................................................................................................................................... 6

Deployment and Installation.................................................................................................................................................... 9

Cable Connectors................................................................................................................................................................... 10

Operation and Measurement ................................................................................................................................................ 11

Maintenance and Recalibration............................................................................................................................................. 14

Troubleshooting and Customer Support................................................................................................................................ 15

Return and Warranty Policy................................................................................................................................................... 17

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-202, SU-205

Type: Ultraviolet-A 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 50581:2012 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 rely on the information provided to us by our material suppliers.

Signed for and on behalf of:

Apogee Instruments, January 2020

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 of 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-200 series UV-A sensors detect UV radiation from 300 to 400 nm and are calibrated in

energy flux density units of watts per square meter (W m-2, equal to Joules per second per square meter). The

output can also be expressed in photon flux density units of micromoles per square meter per second (µmol m-2 s-

1).

Typical applications of UV sensors include incoming UV radiation measurement in outdoor environments or in

laboratory use with artificial light sources (e.g., germicidal lamps).

Apogee Instruments SU-200 series UV-A sensors consist of a cast acrylic diffuser, photodiode, and signal processing

circuitry mounted in an anodized aluminum housing and a cable to connect the sensor to a measurement device.

SU-200 sensors are designed for continuous UV-A radiation measurement in indoor or outdoor environments. The

SU-200 series outputs an analog voltage that is directly proportional to UV-A radiation incident on a planar surface

(does not have to be horizontal) where the radiation emanates from all angles of a hemisphere.

Sensor model number and serial number are

located on the bottom of the sensor. If you need

the manufacturing date of your sensor, please

contact Apogee Instruments with the serial

number of your sensor.

SENSOR MODELS

This manual covers the amplified model SU-202 and SU-205 UV-A sensors (listed below in bold). Additional models

are covered in their respective manuals.

Model

Signal

SU-200

0-10 mV

SU-202

0- 2.5 V

SU-205

0- 5 V

SPECIFICATIONS

Calibration Traceability

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

sensors under UV-enhanced T5 fluorescent tubes. The transfer standard UV 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-202-SS

SU-205-SS

Power Supply

3.3 to 24 V DC

5.5 to 24 V DC

Output (sensitivity)

25 mV per W m-2;

8.33 mV per µmol m⁻² s⁻¹

50 mV per W m-2;

16.67 mV per µmol m⁻² s⁻¹

Calibration Factor (reciprocal of

sensitivity)

0.04 W m-2 per mV;

0.12 µmol m⁻² s⁻¹ per mV

0.02 W m-2 per mV;

0.06 µmol m⁻² s⁻¹ per mV

Calibration Uncertainty

± 10 %

Output Range

0 to 2.5 V

0 to 5 V

Measurement Range

0 to 100 W m-2

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

300 to 400 nm (wavelengths where response is greater than 10 % of maximum; see

Spectral Response below)

Directional (Cosine) Response

± 2 % at 45°, ± 5 % at 70°

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

Cosine Response

Cosine Response Graph

Directional, or cosine, response is

defined as the measurement error at

a specific angle of radiation incidence.

Directional error for Apogee SU-200

series UV-A sensors is approximately ±

2 % and ± 5 % at solar zenith angles of

45° and 75°, respectively.

Mean cosine response of four

Apogee UV-A sensors. Cosine

response was calculated as the

relative difference of UV-A

sensors from the mean of

replicate reference UV-A

sensors deployed outdoors.

These data are the average of

the AM and PM response.

Spectral Response

Spectral response

estimate of Apogee SU-

200 UV-A sensors.

Spectral response was

modeled from sensitivity

of the photodetector and

transmittance of the

diffuser.

DEPLOYMENT AND INSTALLATION

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

CABLE CONNECTORS

Apogee sensors offer cable connectors to simplify the

process of removing sensors from weather stations

for calibration (the entire cable does not have to be

removed from the station and shipped with the

sensor).

The ruggedized M8 connectors are rated IP68, made

of corrosion-resistant marine-grade stainless-steel,

and designed for extended use in harsh

environmental conditions.

Cable connectors are attached directly to the head.

Instructions

Pins and Wiring Colors: All Apogee

connectors have six pins, but not all pins are

used for every sensor. There may also be

unused wire colors inside the cable. To

simplify datalogger connection, we remove

the unused pigtail lead colors at the

datalogger end of the cable.

If a replacement cable is required, please

contact Apogee directly to ensure ordering

the proper pigtail configuration.

Alignment: When reconnecting a sensor,

arrows on the connector jacket and an

aligning notch ensure proper orientation.

Disconnection for extended periods: When

disconnecting the sensor for an extended

period of time from a station, protect the

remaining half of the connector still on the

station from water and dirt with electrical

tape or other method.

A reference notch inside the connector ensures

proper alignment before tightening.

When sending sensors in for calibration, only send the sensor head.

Tightening: Connectors are designed to be

firmly finger-tightened only. There is an o-

ring inside the connector that can be overly

compressed if a wrench is used. Pay

attention to thread alignment to avoid

cross-threading. When fully tightened, 1-2

threads may still be visible.

WARNING: Do not tighten the connector by

twisting the black cable or sensor head, only

twist the metal connector (blue arrows).

Finger-tighten firmly

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