Apogee Instruments MQ-500 Manuale utente
APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA
TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM
Copyright © 2021 Apogee Instruments, Inc.
OWNER’S MANUAL
QUANTUM METER
Models MQ-500
Rev: 1-Jun-2021
TABLE OF CONTENTS
Owner’s Manual ............................................................................................................................................................................... 1
Certificate of Compliance......................................................................................................................................................... 3
Introduction ............................................................................................................................................................................. 4
Sensor Models ......................................................................................................................................................................... 5
Specifications ........................................................................................................................................................................... 6
Deployment and Installation.................................................................................................................................................... 9
Battery Installation and Replacement.................................................................................................................................... 10
Operation and Measurement ................................................................................................................................................ 11
ApogeeAMS Software............................................................................................................................................................ 17
Maintenance and Recalibration............................................................................................................................................. 19
Troubleshooting and Customer Support................................................................................................................................ 21
Return and Warranty Policy................................................................................................................................................... 23
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: MQ-500
Type: Quantum Meter
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, June 2021
Bruce Bugbee
President
Apogee Instruments, Inc.
Radiation that drives photosynthesis is called photosynthetically active radiation (PAR) and is typically defined as
total radiation across a range of 400 to 700 nm. PAR is almost universally quantified as photosynthetic photon flux
density (PPFD), the sum of photons from 400 to 700 nm in units of micromoles per square meter per second (µmol
m-2 s-1, equal to microEinsteins m-2 s-1). While microEinsteins 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. Daily total PPFD is typically
reported in units of moles of photons per square meter per day (mol m-2 d-1) and is often called daily light integral
(DLI).
The acronym PPF is also used and refers to the photosynthetic photon flux. The acronyms PPF and PPFD refer to
the same variable. Both terms are used because there is not a universal definition of the term flux. Flux is
sometimes defined as per unit area per unit time and sometimes defined as per unit time only. PPFD is used in this
manual.
Sensors that measure PPFD are often called quantum sensors due to the quantized nature of radiation. A quantum
refers to the minimum quantity of radiation, one photon, involved in physical interactions (e.g., absorption by
photosynthetic pigments). In other words, one photon is a single quantum of radiation.
Typical applications of quantum sensors include measurement of incident PPFD on plant canopies in outdoor
environments or in greenhouses and growth chambers, and reflected or under-canopy (transmitted) PPFD
measurement in the same environments.
Apogee Instruments MQ series quantum meters consist of a handheld meter and a dedicated quantum sensor that
is connected by cable to an anodized aluminum housing. Sensors consist of a cast acrylic diffuser (filter),
photodiode, and are potted solid with no internal air space. MQ series quantum meters provide a real-time PPFD
reading on the LCD display, that determine the radiation incident on a planar surface (does not have to be
horizontal), where the radiation emanates from all angles of a hemisphere. MQ series quantum meters include
manual and automatic data logging features for making spot-check measurements or calculating daily light integral
(DLI).
Apogee MQ series quantum meters covered in this manual are self-contained and come complete with handheld
meter and sensor.
Sensor model number and serial number are
located on a label on the backside of the handheld
meter.
Calibration Traceability
Apogee MQ series quantum meters are calibrated through side-by-side comparison to the mean of four 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).
MQ-500
Calibration Uncertainty
± 5 % (see calibration Traceability below)
Measurement Range
0 to 4000 µmol m-2 s-1
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
less than 1 ms
Field of View
180º
Spectral Range
389 to 692 nm ± 5 nm (wavelengths where response is greater than 50 %)
Spectral Selectivity
less than 10 % from 412 to 682 nm ± 5 nm (see Spectral Response below)
Directional (Cosine)
Response
± 5 % at 75º zenith angle (see Cosine Response below)
Azimuth Error
less than 0.5 %
Tilt Error
less than 0.5 %
Temperature Response
-0.11 ± 0.04 % C-1 (see Temperature Response below)
Uncertainty in Daily Total
less than 5 %
Detector
blue-enhanced silicon photodidode
Housing
anodized aluminum body with acrylic diffuser
IP Rating
IP68
Operating Environment
0 to 50 C; less than 90 % non-condensing relative humidity up to 30 C; less than 70 % non-
condensing relativity humidity from 30 to 50 C; separate sensors can be submerged in water up
to depth of 30 m
Meter Dimension
126 mm length; 70 mm width; 24 mm height
Sensor Dimensions
24 mm diameter; 37 mm height
Mass
100 g (with 5 m of lead wire)
Cable
2 m of two conductor, shielded, twisted-pair wire; additional cable available; TPR jacket
Spectral Response
Temperature Response
Mean temperature response of ten MQ-500 series
quantum 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
approximately -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 experiment.
Mean spectral response measurements of six
replicate Apogee SQ-100X (original X) and
MQ-500 (full-spectrum) series quantum
sensors. Spectral response measurements
were made at 10 nm increments across a
wavelength range of 300 to 800 nm with a
monochromator and 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.
Cosine Response
Directional (cosine) response is defined as the
measurement error at a specific angle of radiation
incidence. Error for Apogee MQ-500 series quantum
sensors is approximately ± 2 % and ± 5 % at solar zenith
angles of 45° and 75°, respectively.
Mean directional (cosine) response of
seven apogee MQ-500 series
quantum sensors. Directional
response measurements were made
on the rooftop of the Apogee
building in Logan, Utah. Directional
response was calculated as the
relative difference of MQ-500
quantum sensors from the mean of
replicate reference quantum sensors
(LI-COR models LI-190 and LI-190R,
Kipp & Zonen model PQS 1). Data
were also collected in the laboratory
using a reference lamp and
positioning the sensor at varying
angles.
AM-320 Saltwater Submersible
Sensor Wand
AM-310 Extendable Sensor
Wand
Apogee MQ series quantum meters are designed for spot-check measurements, and calculation of daily light
integral (DLI; total number of photons incident on a planar surface over the course of a day) through the built-in
logging feature. To accurately measure PFFD incident on a horizontal surface, the sensor must be level. For this
purpose, each MQ model comes with a different option for mounting the sensor to a horizontal plane.
The AM-310 Sensor Wand accessory incorporates a mounting fixture at the end of an extendable telescopic wand
(up to 33 inches/84 cm). The wand is not suited for wet environments; however, it is excellent for greenhouses and
growth chambers. Its ability to retract to a smaller size also makes it ideal for travel use.
The AM-320 Saltwater Submersible Sensor Wand accessory incorporates a mounting fixture at the end of a 40 inch
segmented fiberglass wand and is well-suited for saltwater use. The wand allows the user to place the sensor in
hard to reach areas such as aquariums.
The AL-100 leveling plate is recommended
for use with the MQ-500 (AL-100 leveling
plate pictured). To facilitate mounting to a
cross arm, the AL-120 mounting bracket is
recommended.
Use a phillips head screwdriver to remove the screw from the battery cover. Remove the battery cover by slightly
lifting and sliding the outer edge of the cover away from the meter.
To power the meter, slide the included battery (CR2320) into the battery holder, after removing the battery door
from the meter’s back panel.
The positive side (designated by a “+” sign) should be facing out from the meter circuit board.
NOTE: The battery cradle can be damaged by using an incorrectly sized battery. If the battery cradle is damaged,
the circuit board will need to be replaced. To avoid this costly problem, use only a CR2320 battery.
Battery Removal
Press down on the battery with a screwdriver or similar object. Slide battery out.
If the battery is difficult to move, turn the meter on its side so that the opening for the battery is facing downward
and tap the meter downward against an open palm to dislodge the battery enough so that it can be removed with
your thumb to slide the battery out of the battery holder.
Indice
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