Apogee SQ-420 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

USB QUANTUM SENSOR

Model SQ-420

TABLE OF CONTENTS

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

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

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

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

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

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

Software Installation .................................................................................................................................................................. 10

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

Windows Software ..................................................................................................................................................................... 13

Mac Software ............................................................................................................................................................................. 18

Maintenance and Recalibration ................................................................................................................................................. 24

Troubleshooting and Customer Support .................................................................................................................................... 26

Return and Warranty Policy ....................................................................................................................................................... 27

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: SQ-420

Type: Quantum 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, October 2019

Bruce Bugbee

President

Apogee Instruments, Inc.

INTRODUCTION

Radiation that drives photosynthesis is called photosynthetically active radiation (PAR) and is typically defined as

total radiation between 400 and 700 nm. PAR is often expressed as photosynthetic photon flux density (PPFD):

photon flux in units of micromoles per square meter per second (µmol m-2 s-1, equal to microEinsteins per square

meter per second) summed from 400 to 700 nm (total number of photons from 400 to 700 nm). While Einsteins

and micromoles are equal (one Einstein = one mole of photons), the Einstein is not an SI unit, so expressing PPFD

as µmol m-2 s-1 is preferred.

The acronym PPF is also widely used and refers to the photosynthetic photon flux. The acronyms PPF and PPFD

refer to the same parameter. The two terms have co-evolved because there is not a universal definition of the

term “flux”. Some physicists define flux as per unit area per unit time. Others define flux only as per unit time.

We have used PPFD in this manual because we feel that it is better to be more complete and possibly redundant.

Sensors that measure PPFD are often called quantum sensors. A quantum is the minimum quantity of radiation

(one photon), necessary to cause a physical, electrical, or chemical reaction (e.g., absorption by photosynthetic

pigments). So one photon is a single quantum of radiation.

Apogee Instruments Quantum Sensor consists of a cast acrylic diffuser (filter), photodiode, and signal processing

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

The sensor is potted solid with no internal air space. It is designed for continuous PPFD measurement in indoor,

outdoor and underwater environments. The SQ-420 sensor output increases linearly with PPFD under sunlight

(natural setting) or electric lights (electric setting). The signal from the sensor is directly proportional to radiation

incident on a flat surface where the radiation comes from all angles of a hemisphere.

SENSOR MODELS

This manual covers the USB quantum sensor model SQ-420. Additional models are covered in their respective

manuals.

Model

Signal

Calibration

SQ-420

USB

Sunlight and Electric

light

SQ-110

Self-powered

Sunlight

SQ-120

Self-powered

Electric light

SQ-212

0-2.5 V

Sunlight

SQ-222

0-2.5 V

Electric light

SQ-214

4-20 mA

Sunlight

SQ-224

4-20 mA

Electric light

SQ-215

0-5 V

Sunlight

SQ-225

0-5 V

Electric light

SQ-311

Self-powered

Sunlight

SQ-321

Self-powered

Electric light

SQ-313

Self-powered

Sunlight

SQ-323

Self-powered

Electric light

SQ-316

Self-powered

Sunlight

SQ-326

Self-powered

Electric light

SQ-421

SDI-12

Sunlight and Electric

light

SQ-422

Modbus

Sunlight and Electric

light

Sensor model number and serial number are

located near USB connector. If you need the

manufacturing date of your sensor, please

contact Apogee Instruments with the serial

number of your sensor.

SPECIFICATIONS

Calibration Traceability

Apogee SQ series quantum sensors are calibrated through side-by-side comparison to the mean of transfer

standard quantum sensors under a reference lamp. The reference quantum sensors are recalibrated with a 200 W

quartz halogen lamp traceable to the National Institute of Standards and Technology (NIST).

SQ-420

Resolution

0.1 µmol m-2 s-1

Calibration Factor

Custom for each sensor and stored in the firmware

Calibration Uncertainty

± 5 % (see calibration Traceability below)

Measurement

Repeatability

Less than 0.5 %

Long-term Drift

(Non-stability)

Less than 2 % per year

Non-linearity

Less than 1 % (up to 4000 µmol m-2 s-1)

Response Time

Software updates every second

Field of View

180°

Spectral Range

410 to 655 nm (wavelengths where response is greater than 50 % of

maximum; see Spectral Response below)

Spectral Selectivity

Less than 10 % from 469 to 655 nm

Directional (Cosine)

Response

± 5 % at 75° zenith angle (see Cosine Response below)

Temperature Response

0.06 ± 0.06 % per C (see Temperature Response below)

Operating Environment

-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to

depths of 30 m

Dimensions

24 mm diameter, 33 mm height

Mass

Sensor head weighs 90 g

USB Cable

4.5 m (15 ft)

Current Draw (when

Logging)

61 mA

Spectral Response

Temperature Response

Mean spectral response of six sensors

(error bars represent two standard

deviations above and below mean)

compared to PAR (PPFD) weighting

function. Spectral response

measurements were made at 10 nm

increments across a wavelength range of

300 to 800 nm in a monochromator with

an attached electric light source.

Measured spectral data from each

quantum sensor were normalized by the

measured spectral response of the

monochromator/electric light

combination, which was measured with a

spectroradiometer.

Mean temperature response of eight

replicate sensors (errors bars represent

two standard deviations above and

below mean). Temperature response

measurements were made at 10 C

intervals across a temperature range of -

10 to 40 C in a temperature controlled

chamber under a fixed, broad spectrum,

electric lamp. At each temperature set

point, a spectroradiometer was used to

measure light intensity from the lamp

and all quantum sensors were compared

to the spectroradiometer. The

spectroradiometer was mounted external

to the temperature control chamber and

remained at room temperature during

the measurements.

Cosine Response

Directional, or cosine, response is defined as the

measurement error at a specific angle of radiation

incidence. Error for Apogee SQ series quantum

sensors is approximately ± 2 % and ± 5 % at solar

zenith angles of 45° and 75°, respectively.

Mean cosine response of twenty-

three replicate sensors (error bars

represent two standard deviations

above and below mean). Cosine

response measurements were

made by direct side-by-side

comparison to the mean of four

reference thermopile

pyranometers, with solar zenith

angle-dependent factors applied to

convert total shortwave radiation

to PPFD. Blue points represent the

AM response and red points

represent the PM response.

DEPLOYMENT AND INSTALLATION

Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure PPFD 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 green cap should be removed from the sensor. The green 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

SOFTWARE INSTALLATION

The most recent version of ApogeeConnect software can be downloaded at

http://www.apogeeinstruments.com/downloads/.

Installing the software on a PC (Windows compatible, XP and later)

1. Double click on the installer package

2. On the ‘Welcome’ screen, please click ‘Next’ to continue.

3. Select the radio button next to “I Agree” to the UELA… and click ‘Next’ to continue.

4. On the ‘Ready to Install the Program’ screen, click ‘Install’ to continue.

5. Click ‘Finish’ to complete the installation. There are shortcuts on your desktop and in your start bar.

Installing the software on a Mac (Mac compatible, 10.10 and later)

1. Double click on the installer package

2. On the ‘Introduction’ screen, please click ‘Continue’ to proceed.

3. Select ‘Continue’ on the ‘Read Me’ screen to continue, this screen contains a history of updates made to

the ApogeeConnect software versions.

4. Select ‘Continue’ on the ‘License’ screen to receive a prompt to agree to the terms of the software license

agreement. Click ‘Agree’ to continue once you receive the prompt.

5. On the ‘Installation Type’ screen, click ‘Install’ to install the software. You can change the location the

software installs to by clicking ‘Change Install Location…’. *Note: You may be prompted for an

administrator password at this time. If you are, proceed by entering your respective password and clicking

‘Install Software’.

6. Once you receive the message “The installation was successful.” on the ‘Summary’ screen click ‘Close’.

Your software is now ready to be used.

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