METER AM-500 Manuale utente

APOGEE

NET RADIOMETER

TABLE OF CONTENTS

1. Introduction.............................................................................................. 2

2. Installation................................................................................................2

2.1 Set Up Mounting Assembly........................................................................4

2.2 Connect to METER ZENTRA Series Logger .................................................5

3. Data Interpretation .............................................................................. 6

4. Troubleshooting ..................................................................................... 6

5. Customer Support ................................................................................7

Index ...................................................................................................................8

18445-00

8.31.2021

USING APOGEE NET RADIOMETERS WITH ZENTRA SYSTEM

1. INTRODUCTION

The Apogee Instruments SN-500 Net Radiometer is a four-component net radiometer

designed for continuous measurement of net radiation in outdoor environments. The

net radiometer uses four filtered blackbody thermopile sensors to measure the four

components of net radiation independently. An upward-facing pyranometer and pyrgeometer

pair measures the downwelling shortwave and longwave radiation, respectively, while a

downward-facing pyranometer and pyrgeometer pair measures upwelling shortwave and

longwave radiation. The four radiation components can be used individually or combined

to yield several important parameters including net radiation, which is a key variable in the

surface energy balance, shortwave irradiance, net short- and longwave radiation, albedo, and

many others.

The information in this document explains how to install the required hardware to mount the

Apogee Net Radiometer that has been preconfigured by METER Group to work seamlessly

with METER ZENTRA series data loggers. Details of how the ZENTRA system handles the

data are also included. Please read this document carefully in its entirety before going out to

the field.

For more information on the Apogee net radiometers, please review the Net Radiometer

User Manual or visit the Apogee Net Radiometer product page (apogeeinstruments.com/

net-radiometer).

2. INSTALLATION

Follow the steps listed in Table 1 to install the Apogee Net Radiometer in the field. The

mounting rod as well as mounting brackets and fastening hardware are included with the

sensor. Other tools will need to be provided.

Table 1 Installation

Tools Needed

Wrench 13 mm (0.5 in)

Philips screwdriver

Mounting post 33.0 to 53.3 mm (1.3 to 2.1 in) diameter post, pole, tripod,

tower, or other similar infrastructure that extends above the canopy

Mounting rod (included)

Mounting bracket Model AM-500 (included)

METER ZENTRA series data logger ZL6 or EM60

METER ZSC Bluetooth®Sensor Interface (optional)

METER ZENTRA software ZENTRA Utility, ZENTRA Utility Mobile, or

ZENTRACloud

INSTALLATION

Table 1 Installation (continued)

Preparation

Conduct System Check

METER strongly recommends setting up and testing the system (sensors and

data loggers) in the lab or ofﬁce.

Inspect and verify all components are intact.

Visit the data logger product page for the most up-to-date software and

ﬁrmware.

Verify all sensors are functional and read within expected ranges.

Consider the Surroundings

Choose a location that allows the up-facing sensors to be above the plant

canopy or in a position where the view of the sky is unobstructed (such as a

large canopy gap or forest clearing).

Ensure the sensor is not shaded from nearby objects (weather stations,

mounting posts, etc.).

Mounting

Install on Mounting Post

Use the U-bolts to mount the mounting bracket and sensor (Section2.1). The

U-bolts are compatible with most meterological stands, poles, tripods, and

other mounts.

Secure the System

Tighten the U-bolt nuts by hand until hand-tight, and then tighten with a

wrench. Ensure the net radiometer remains level.

CAUTION: Do not overtighten U-bolts.

Secure and Protect Cables

NOTE: Improperly protected cables can lead to severed cables or disconnected sensors.

Cabling issues can be caused by many factors such as rodent damage, driving over sensor

cables, tripping over cables, not leaving enough cable slack during installation, or poor

sensor wiring connections.

Install cables in conduit or plastic cladding when near the ground to avoid

rodent damage.

Gather and secure cables between the sensors and the data logger to the

mounting post in one or more places to ensure cable weight does not pull the

plug free from its port.

Connect to Data Logger

Plug the sensor into a data logger.

Use the data logger to make sure the sensor is reading properly.

Verify these readings are within expected ranges.

For more instructions on connecting to data loggers, refer to Section2.2.

USING APOGEE NET RADIOMETERS WITH ZENTRA SYSTEM

2.1 SET UP MOUNTING ASSEMBLY

Apogee net radiometers must be level to accurately measure the four components of

net radiation. Each net radiometer purchased from METER comes with an AM-500 Net

Radiometer Mounting Bracket. The AM-500 can be mounted to either a horizontal or vertical

post depending on which set of U-bolt holes are used. However, mounting to a horizontal arm

that extends away from the main mounting mast is highly recommended.

1. Align the cable M8 connector pins with the sensor M8 connector holes and seat

connectors fully.

2. Tighten the cable screw until hand-tight.

M8 connectors are easy to overtighten. Do not use pliers or other tools to tighten

thisconnector.

3. Attach the mounting bracket either to a horizontal arm (Figure2) or vertical post using

the included U-bolts.

Mounting bracket

(model AM-500)

Bubble level

Figure1 Apogee Net Radiometer sensor installed on mast or pipe

4. If installation is in the Northern Hemisphere, ensure the sensor is oriented to the South

of the main mounting mast.

If installation is in the Southern Hemisphere, ensure the sensor is oriented to the North

of the main mounting mast.

5. Thread the mounting rod into the body of the net radiometer.

6. Clamp the mounting rod into the AM-500 mounting bracket using the integrated Philips

screws.

7. Use the Philips screws on the mounting bracket to level the sensor according to the

bubble level on the top of the sensor.

INSTALLATION

2.2 CONNECT TO METER ZENTRA SERIES LOGGER

Apogee net radiometers are preconfigured by METER and work seamlessly with METER

ZENTRA series data loggers. The sensors come with a 3.5-mm stereo plug connector

(Figure2) to facilitate easy connection with the data loggers. Apogee sensors come standard

with a 5-m cable.

Ground

Digital communication

Power

Figure2 3.5-mm stereo plug connector wiring

Check the METER download webpage for the most recent data logger firmware. Logger

configuration may be done using either ZENTRA Utility (desktop and mobile application) or

ZENTRA Cloud (web-based application for cell-enabled ZENTRA data loggers).

1. Plug the stereo plug connector into one of the sensor ports on the logger (Figure3).

Port 1Port 2Port3Port 4 Po rt 5Port 6

TEST

ERROR

(-)

(-)(-) (-)

(-)(+)(-)(+)(+)

(+)(+)(+)

Conduit

Figure3 Logger connection

2. Connect to the data logger via ZENTRA Utility with a laptop and USB cable or ZENTRA

Utility Mobile app with a mobile device supporting Bluetooth®communication.

3. Use ZENTRA Utility to scan the ports and make sure the sensors were properly identiﬁed

by the logger and are reading properly.

METER data loggers should automatically recognize the Apogee sensor.

4. Use ZENTRA Utility to set the measurement interval.

5. Use ZENTRA Utility to conﬁgure communication settings for data transfer to ZENTRA Cloud.

Sensor data can be downloaded from METER data loggers using either ZENTRA Utility or

ZENTRA Cloud. Refer to the logger user manual for more information.

USING APOGEE NET RADIOMETERS WITH ZENTRA SYSTEM

3. DATA INTERPRETATION

Apogee net radiometers used with the ZENTRA system report the four individual components

and the combined net radiation in units of watts per square meter (W/m2). Various other

combinations of the individual components (net short- and longwave radiation, albedo, etc.)

can be calculated during postprocessing, and some are included as environmental model

options in the ZENTRA Cloud reports page. Additionally, the sensor orientation information is

provided in the metadata tab of ZENTRA Cloud and ZENTRA Utility file downloads (Microsoft®

Excel®spreadsheet) and on the measurement configuration page of ZENTRA Cloud. Sensor

orientation is reported as the sensor zenith angle in units of degrees, with a zenith angle of

0° indicating a sensor oriented straight up.

4. TROUBLESHOOTING

This troubleshooting section details possible major problems and their solutions. If the

problem is not listed or these solutions do not solve the issue, contact Customer Support.

Table 2 Troubleshooting

Problem Possible Solution

Sensor not responding Check power to the sensor and logger.

Check sensor cable and stereo plug connector integrity.

Check that the SDI-12 address of the sensor is 0(factory default).

Check this with ZENTRA Utility by going to Actions, select Digital

sensor terminal, choose the port that sensor is on, and send the

?I! command to the sensor from the dropdown menu.

Sensor values are not reasonable Verify the sensor is not shaded.

Verify the orientation angle of sensors.

Cable or stereo plug

connectorfailure

If the stereo plug connector is damaged or needs to be replaced,

contact Customer Support for a replacement connector or

splice kit.

If a cable is damaged refer to the METER wire-splicing guide for

cable repair.

It is recommended that Apogee net radiometers are returned for recalibration every 2 years.

Visit Apogee repairs (apogeeinstruments.com/recalibration-and-repairs) or contact Apogee

Technical Support (techsupport@apogeeinstruments.com) for details.

CUSTOMER SUPPORT

5. CUSTOMER SUPPORT

NORTH AMERICA

Customer support representatives are available for questions, problems, or feedback

Monday through Friday, 7:00 am to 5:00 pm Pacific time.

Email: support.environment@metergroup.com

sales.environment@metergroup.com

Phone: +1.509.332.5600

Fax: +1.509.332.5158

Website: metergroup.com

EUROPE

Customer support representatives are available for questions, problems, or feedback

Monday through Friday, 8:00 to 17:00 Central European time.

Email: support.europe@metergroup.com

sales.europe@metergroup.com

Phone: +49 89 12 66 52 0

Fax: +49 89 12 66 52 20

Website: metergroup.de

If contacting METER by email, please include the following information:

Name

Address

Phone

Email address

Instrument serial number

Description of the problem

NOTE: For products purchased through a distributor, please contact the distributor directly for assistance.

INDEX

cables 3, 5, 6

connecting 5

customer support 7

data 6

data logger.

See

ZENTRA series data loggers

installation 2–3

mounting 3

preparation 3

tools needed 2

mounting 2

mounting bracket 2

net radiometer 2, 4

recalibration 6

stereo plug connector 5

troubleshooting 6

U-bolt 3, 4

user manual 2

ZENTRA series data loggers 2, 3, 5

ZENTRA software

Cloud 2, 6

Utility 2, 5, 6

ZSC 2

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