METER SI-400 Series User manual

APOGEE
IRRADIOMETER

i
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
18481-00
8.31.2021

SI-400 Series
SIL-400 Series

2
USING APOGEE IR SENSORS WITH ZENTRA SYSTEM
1. INTRODUCTION
The SI and SIL series Infrared (IR) Radiometers from Apogee Instruments, Inc. are designed
specifically for high-accuracy, noncontact, surface temperature measurements for
environmental applications. The IR radiometers in the SI series have research-grade
accuracy with uncertainty of ±0.2 °C over a wide range of temperatures and temperature
differences. The SIL series are lower cost with commercial-grade uncertainty of ±0.5 °C
over a more restrictive temperature range and are a great choice for many environmental
monitoring applications.
Apogee IR radiometers purchased from METER come preconfigured by METER to work
seamlessly with METER ZENTRA series data loggers. The information in this document
explains how to integrate Apogee IR radiometers into the ZENTRA system. 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 IR radiometers, please review the Infrared Radiometer
User Manuals on the Apogee Infrared Radiometer product page (apogeeinstruments.com/
infraredradiometer).
2. INSTALLATION
Follow the steps listed in Table 1 to install Apogee sensors in the field.
Table 1 Installation
Tools Needed
Wrench 13 mm (0.5 in)
Wrench 11 mm (0.4375 in), for AM-250 mounting bracket only
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 to the desired mounting height
Mounting bracket Model AM-220 for SI series or AM-250 for SIL series (included
in order)
METER ZENTRA series data logger ZL6 or EM 60
METER ZSC Bluetooth®Sensor Interface (optional)
METER ZENTRA software ZENTRA Utility, ZENTRA Utility Mobile, or
ZENTRACloud

3
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 Field of View (FOV) Requirements
The measurement FOV of the IR radiometer will depend on mounting height,
mounting angle, and the sensing half angle of the radiometer. Use the Apogee
IRR Calculators (apogeeinstruments.com/irr-calculators) to help calculate the
FOV from these parameters and help determine mounting height requirements
to achieve the desired FOV.
Mounting
Install on Mounting Post
Use the included bolts to mount the mounting bracket and the sensor at the
needed angle (Section2.1).
Remove the green sensor protection cap.
Secure the System
Tighten the U-bolt or straight bolt to lock the sensor orientation.
Tighten the U-bolt nuts by hand until hand-tight, and then tighten with a wrench.
CAUTION: Do not overtighten U-bolt.
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.

4
USING APOGEE IR SENSORS WITH ZENTRA SYSTEM
2.1 SET UP MOUNTING ASSEMBLY
IR radiometers must be mounted such that their FOV encompasses the surface of interest.
Each IR radiometer purchased from METER comes with the appropriate mounting bracket
that can be mounted to either a horizontal or vertical post, depending on which set of holes
is used.
1. For the SIL series, the connector is already fully attached; skip to step3.
For the SI series, align the cable M8 connector pins with the sensor M8 connector holes
and seat connectors fully.
2. Tighten the cable screw until hand-tight (Figure1).
M8 connectors are easy to overtighten. Do not use pliers or other tools to tighten
thisconnector.
Finger-tighten firmly
To sensor
To data
logger
Figure1 Attach M8 connector
3. Attach the mounting bracket either to a horizontal arm or vertical post using the
included U-bolt.
4. Attach the sensor to the mounting bracket using the included U-bolt or straight bolt
(Figure2).
SI-400
series sensor
AM-220
mounting bracket
SIL-400
series sensor
AM-250
mounting bracket
U-bolt
Figure2 Apogee IR sensor and mounting bracket
5. Orient the sensor to the proper angle to achieve the desired FOV. Use the Apogee IRR
Calculators (apogeeinstruments.com/irr-calculators) to help calculate FOV.

5
INSTALLATION
2.2 CONNECT TO METER ZENTRA SERIES LOGGER
The Apogee IR radiometers are preconfigured by METER and work seamlessly with METER
ZENTRA series data loggers. The sensor comes with a 3.5-mm stereo plug connector
(Figure3) to facilitate easy connection with the data loggers. Apogee sensors come standard
with a 5-m cable.
Ground
Digital
communication (orange)
Power (brown)
Figure3 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4).
Port 1Port 2Port3Port 4 Po rt 5Port 6
TEST
OK
ERROR
(-)
(-)(-) (-)
(-)(+)(-)(+)(+)
(+)(+)(+)
Conduit
Figure4 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.

6
USING APOGEE IR SENSORS WITH ZENTRA SYSTEM
3. DATA INTERPRETATION
Apogee IR radiometers used with the ZENTRA system report target temperature and internal
sensor temperature in units that are configurable by the user. Additionally, the sensor
orientation information of the SIL-series commercial-grade IR radiometer is provided in the
metadata tab of ZENTRA Cloud and ZENTRA Utility Microsoft®Excel®file downloads. Sensor
orientation is reported as the 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 the sensor is on, and send the
?I! command to the sensor from the dropdown menu.
Inaccurate target temperature Remove dew or frost formation on the sensor optical filter.
Remove any salt deposits (due to irrigation water or sea spray)
accumulation on the filter, using a dilute acid (e.g., vinegar). Salt
deposits cannot be removed with solvents such as alcohol or
acetone.
Clean dust and dirt from the aperture and the filter (usually a larger
problem in windy environments). Dust and dirt are best removed
with deionized water or rubbing alcohol. In extreme cases, remove
the plastic radiation shield and clean the filter with acetone.
Remove any spiders, insects, nests, or other debris in the aperture
leading to the filter. Repellent should be applied around the
aperture entrance (not on the filter).
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 IR radiometer sensors are returned for recalibration every
2 years. Visit Apogee repairs (apogeeinstruments.com/recalibration-and-repairs) or contact
Apogee Technical Support ([e-mail]) for details.

7
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: [e-mail]
[e-mail]
Phone: [phone]
Fax: [phone]
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: [e-mail]
[e-mail]
Phone: [phone]
Fax: [phone]
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

INDEX
8
INDEX
C
cables 3, 5
connecting 5
customer support 7
D
data 6
data logger.
See ZENTRA series data loggers
I
installation 2–3
mounting 3
preparation 3
tools needed 2
M
mounting 3
mounting bracket 2
R
recalibration 6
S
stereo plug connector 5, 6
T
temperature 2, 6
troubleshooting 6
U
U-bolt 4
user manual 2
Z
ZENTRA series data loggers 2, 3, 5
ZENTRA software
Cloud 2
Utility 2, 5, 6
ZSC 2

18482-00
8.31.2021
METER Group, Inc. USA
2365 NE Hopkins Court Pullman, WA 99163
T: +1.509.332.2756 F: +1.509.332.5158
E: [e-mail] W: metergroup.com
METER Group AG
Mettlacher Straße 8, 81379 München
T: [phone] F: [phone]
E: [e-mail] W: metergroup.de
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