Delta-T UV3pA Manuel utilisateur
User Manual for the
UV Radiation
Sensors
types UV3pA, B and AB
UV3-UM-1.1
Delta-T Devices Ltd
Notices
Copyright
All rights reserved. Under the copyright laws, this manual may not be
copied, in whole or in part, without the written consent of Delta-T Devices
Ltd. Under the law, copying includes translation into another language.
Copyright © 2000, 2003 Delta-T Devices Limited.
CE conformity
UV3pA, B, and AB
The sensors described in this document are CE marked by the
manufacturer.
Design changes
Delta-T Devices Ltd reserves the right to change the designs and
specifications of its products at any time without prior notice.
User Manual Version: 1.1 August 2003
Delta-T Devices Ltd Tel: +44 1638 742922
128, Low Road, Burwell Fax: +44 1638 743155
CAMBRIDGE CB5 0EJ e-mail: sales
@
delta-t.co.uk
U.K. web: www.delta-t.co.uk
Contents
Introduction 5
Summary of Features 5
Scope of This Manual 5
Installation 6
Unpacking 6
Description of Equipment 6
Mounting the Sensor 7
UV3p Sensor Connections 8
Outline Specs 8
Sensor Wiring 8
Power Requirements 8
Cable 9
Data Requirements 9
UV3p Logger Connections 10
DL2e Logger 10
UV3p Wiring Schematic for DL2e 10
DL3000 Logger 12
Other Loggers 12
Specifications 13
Spectral Response 13
Cosine Response 14
UV3p Specification Table 15
Amplifier characteristics 16
Certification 16
Maintenance 18
Routine Maintenance 18
Recalibration 18
Storage 18
Warranty and Service 19
Terms and Conditions of Sale 19
Service and Spares 20
UV3 User Manual 1.1 Introduction z3
Introduction
Summary of Features
The UV3p sensors are sensitive to ultra-violet radiation. They are
intended for measurements of solar UV of interest to plant scientists and
people involved in environmental monitoring.
The family of sensors covers different parts of the UV region of the solar
spectrum. The B region has traditionally been associated with the most
biological damage, but there is increasing interest in the biological effects
of the lower energy A band. The AB sensor includes both A and B bands.
The sensors incorporate a photodiode detector and transimpedance
amplifier, powered by a single rail power supply. This produces a
standard millivolt output signal that is suitable for data logging.
The sensor can be supplied with an optional levelling mount.
The UV3p sensors are improved versions of the former UV2p sensors,
with the following features:
•Millivolt output with preset, standard sensitivity
•Data logger compatible
•High stability, low temperature coefficient photodiodes
•Self cleaning, stay-dry diffuser with water drainage slots
•Good cosine response with infinity-error correction ring
•All-aluminium body with weather resistant anodising
•Individual sensor calibration and spectral response certificates.
Scope of This Manual
This manual contains the specifications and performance of the UV3pA, B
and AB sensors, and describes their installation with Delta-T data loggers.
You may also need to refer to the appropriate Delta-T logger User Manual
or On-line Help.
UV3 User Manual 1.1 Introduction z5
Installation
Unpacking
Check for any damage that may have occurred to the consignment in
transit. Check that the contents of the consignment agree with the
Packing List.
If any damage or shortage is apparent, notify the agents and the carriers
immediately.
Make a note of the sensor(s) serial number(s), and check that the cable
supplied is the length that was ordered. The serial numbers will be
needed in any subsequent warranty claims, repairs or recalibration.
The parts supplied may include:
•UV3pA, B or AB sensor with cable fitted
•Levelling mount or other mounting bracket
Cable lengths, other than the standard 5m, that are pre-ordered will
normally be fitted in unbroken lengths.
Description of Equipment
Outline Diagrams:
6 zInstallation UV3 User Manual 1.1
Cosine Diffuser
Photodiode
Filter Glasses
Amplifier
23mm
25mm
43mm
50mm
Mounting the Sensor
M4 mounting screws are provided for the two tapped holes in the base of
each sensor. The mounting holes are at 43 mm spacing.
Warning! Do not use the central hole for mounting the sensor. It is
provided only for factory calibration purposes.
The sensor is usually mounted horizontally for most solar radiation
insolation studies. The readings then give the irradiance (W.m-2) of a
horizontal surface.
A levelling mount is offered as an option, or you can easily make up your
own mounting plate.
If you need to remove excess length of cable at this stage, simply cut off
the excess, but allow for a sufficient length of the cable screen.
Levelling Mount type SRLF1
This is a freestanding platform with adjustable legs and bubble level to
allow the sensor to be accurately mounted horizontally.
UV3 User Manual 1.1 Installation z7
UV3p Sensor Connections
Outline Specs
Parameter Value
Output 1 mV per W.m-2 of radiation in the relevant wave band
Type Waveband
Peak λFWHM*
UV3pA UV A 373 ±2 nm 31 ±2 nm
UV3pB UV B 313 ±2 nm 26 ±2 nm
UV3pAB UV AB 360 ±5 nm 72 ±5 nm
* Full Width Half Maximum
Sensor Wiring
The sensors are fitted with 5m of 4-core screened cable, with bare wire
ends as standard.
Conductor Function Notes
Blue UV Signal HI
Green UV Signal LO Common with Power 0V inside the
sensor. Do not link this wire with Power
0V (yellow). It may create reading
errors.
Red Power V+
Yellow Power 0V
Screen screen Connected to metal body of sensor. Not
connected to any other conductors.
Power Requirements
Power supply 7 - 15 V dc, unstabilised (~2mA)
Power warm up time 10 seconds
8 zUV3p Sensor Connections UV3 User Manual 1.1
Cable
Up to 100m of cable can be fitted at time of ordering.
The UV signal voltage output is not sensitive to the cable length within
this limit.
Data Requirements
Typical common usage:
UV irradiance output Sample every minute.
Average every hour or half-hour.
UV3 User Manual 1.1 UV3p Sensor Connections z9
UV3p Logger Connections
DL2e Logger
Use with LAC1
This diagram shows the wiring connections for the LAC1 analogue input
card. For use with other cards, please refer to the DL2e Logger User
Manual
UV3p Wiring Schematic for DL2e
UV Signal LO (green)
Power V+ (red)
Power 0V (yellow)
Screen
–
61 +
–
62 + 63 NO NC 64 NO NC
–
2 +
–
1 +
–
3 +
–
4 +
–
5 +
BL
R
GN
UV Signal HI (blue)
Y
(or connect to logger frame)
Settings
The example shows the UV3p sensor output connected to analogue
channel number 1 in the DL2e logger.
10 zUV3p Logger Connections UV3 User Manual 1.1
Ce manuel convient aux modèles suivants
2
Table des matières
Autres manuels Delta-T Accessoires
