Irradian DA221-Cos Instruction Manual



 
  
  

 
  
  


 
  
 

 
  
  

















 
  
 





    
        
     


DA221A-Cos
DA221B2-Cos
DA221B3-Cos
DA221AB-Cos
Handbook Ref No. IH006/Issue A
File Ref: DA221-v2a.doc

 
  
  

 
  
  


 
  
 

 
  
  













 
  
 





    
        
     


    
        
     1. Introduction
2. Specification
3. Spectral Response
4. Cosine Angular Response
5. Circuits & Connections
6. Outline Drawings
7. Care and Maintenance
8. Environmental Care, Recycling and Disposal

DA221-Cos Waterproof UV Detector Irradian Limited
1


   
      
    


WATERPROOF UV DETECTORS WITH PRE-AMPLIFIERS
Irradian's DA221-Cos range of data logger compatible ultra-violet
detectors comprise of an ultra-violet sensitive photodiode detector with
filter glasses and a transimpedance amplifier, providing a voltage output.
Each detector is sealed in a waterproof enclosure and operates from a
single rail power supply.
Models in the DA221-Cos series include a UVA detector with peak
response at 365nm, a UVB2 and narrower bandwidth UVB3 detector with
peak responses at 311nm and a broad band UVAB detector with a peak
at 352nm.
Key design features include:
•Good cosine response
•All aluminium body with weather resistant anodising
•High stability photodiodes
•Internal calibration resistor, adjustable for annual recalibration
Four models of sealed UV detectors are available:
UVA: Model DA221A-Cos
UVB: Model DA221B2-Cos
Model DA221B3-Cos
UVAB Model DA221AB-Cos

Irradian Limited DA221-Cos Waterproof UV Detector
2
  
    
   


Models Region Figure λ
peak
FWHM
A-Cos UVA 1 365 ± 2nm 35 ± 2nm
B2-Cos UVB2 2 311 ± 2nm 19 ± 2nm
B3-Cos UVB3 3 311 ± 2nm 14 ± 2nm
AB-Cos UVAB 4 352 ± 5nm 84 ± 5nm
Cosine Corrected Input: Within ±5 % upto 70°. Refer to Figure 5.
Sensitivity*: 10mV per W.m
-2
*Other ranges available on request .
Calibration: ± 7.5% Traceable to NPL standards.
Linearity: <1% Error
Operating Temperature Range: -10 to +60 °C
Storage Temperature Range: -20 to +60 °C
Temperature Dependence: Sensitivity <0.1% / °C (typical)
Amplifier DC offset Refer to Figure 6.
Input Supply: 7 to 15V DC
Current Consumption: <2mA @12V
Warm Up Period: 10 seconds
Cable: 5 meter screened multicore.
(other lengths available)
Mounting: Two M4 tapped holes on a 43mm PCD.
Housing: Black anodised aluminium, also
available in stainless steel.
Enclosure Rating: Waterproof to 10 meters depth.
Weight: 230g (excluding cable)

DA221-Cos Waterproof UV Detector Irradian Limited
3 




   
      
   


DA221A-Cos
Relative Spectral Response
Figure 1
DA221B2-Cos
Relative Spectral Response
Figure 2
0
20
40
60
80
100
320 330 340 350 360 370 380 390 400 410
Wavelength (nm)
R
e
s
p
o
n
s
e
%
0
20
40
60
80
100
270 280 290 300 310 320 330 340 350 360
R
e
s
p
o
n
s
e
%
Wavelength (nm)

Irradian Limited DA221-Cos Waterproof UV Detector
4
    
        
     (continued): 


DA221B3-Cos
Relative Spectral Response
Figure 3
DA221AB-Cos
Relative Spectral Response
Figure 4
0
20
40
60
80
100
270 280 290 300 310 320 330 340 350 360
R
e
s
p
o
n
s
e
%
Wavelength (nm)
0
20
40
60
80
100
240 260 280 300 320 340 360 380 400
R
e
s
p
o
n
s
e
%
Wavelength (nm)

DA221-Cos Waterproof UV Detector Irradian Limited
5 




         
                  
         


COSINE CORRECTED INPUT
Angular Response: Accurately cosine corrected to Lambert's
Cosine Law.
Maximum error is less than ±5% from true
response to 70°from normal incidence.
Typical DA221-Cos
Cosine Angular Response
Figure 5
True Cosine
60°
30°
DA221 Series

Irradian Limited DA221-Cos Waterproof UV Detector
6


   !    
    !        !    
    !     
  
  


Amplifier DC Offset
-8
-6
-4
-2
0
2
4
6
8
10
-10 0 10 20 30 40 50 60
O
f
f
s
e
t
µ
V
Temperature °C
Figure 6
DA221-Cos Wiring
Supply (+) ------ Red
Supply (-) ------ Yellow
Output (+) ------ Blue
Output (-) ------ Green
NOTE: Do not link Output (-) to Supply (-) on data logger.
Do not connect cable screen to data logger.
+
-
+V
O/P
7 - 15V
Supply
+5V
-5V
0V
0V
Zero
Gain / Cal.
Reg.
Invertor

DA221-Cos Waterproof UV Detector Irradian Limited
7 
"
""
"

    
        
     

 


DA221-Cos Series Detector
DA221-Cos Series Schematic
Cosine Diffuser
Photodiode
Filter Glasses
Amplifier
50mm
Cable Gland
50mm

Irradian Limited DA221-Cos Waterproof UV Detector
8
#
##
#       
              
       
LOOKING AFTER THE DETECTOR
1. The DA221-Cos detector should be cleaned using a moist cloth with
detergent, solvent or alcohol.
2. The diffuser on the detector should be kept clean at all times.
3. The detector is a precision instrument, protect it from shocks.
4. Avoid supporting the detector by the cable.

DA221-Cos Waterproof UV Detector Irradian Limited
9 
$
$$
$      % &  
      % &        % &  
      % &   


   
      
   


WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT
The purpose of the European Commission WEEE directive (Waste
Electrical and Electronic Equipment; 2002/96/EC) is to ensure that
electrical and electronic products are recycled using the best treatments,
recovery and recycling techniques that are currently available. This is so
that high health standards and a lasting environmental protection can be
achieved and maintained.
This product has been designed and manufactured using high quality
materials and components, many of which can be recycled and reused.
Please remember to observe the local regulations that govern both the
disposal of the packaging materials accompanying this product and any
used batteries.
DO NOT DISPOSE OF THIS PRODUCT IN YOUR
GENERAL WASTE BIN.
Please inform yourself about your local WEEE collection
system which is available for electrical and electronic
products that are marked with the symbol shown here.
When disposing of this meter, please use one of the following options:
1. Use your local designated WEEE collection facilities to dispose of the
complete product (including cables, detectors, filters & accessories).
2. Return the complete product back to Irradian, marking it clearly as
intended for WEEE disposal.

This page left blank

This page left blank



  '(
 '( '(
 '(


9 Elphinstone Road Telephone: [phone]
Tranent Facsimile: [phone]
East Lothian E-mail: [email protected]
Scotland EH33 2LG Web: www.irradian.co.uk