Delta OHM LP UVA 02 Manuel utilisateur

- 1 -

Our instruments' quality level is the results of the product continuous

development. This can bring about differences between the information written

in this manual and the instrument that you have purchased. We cannot entirely

exclude errors in the manual, for which we apologize.

The data, figures and descriptions contained in this manual cannot be legally

asserted. We reserve the right to make changes and corrections without prior

notice.

REV. 1.0

10 jan. 2007

LP UVA 02

- 2 -

LP UVA 02

1 Introduction

The LP UVA 02 radiometer measures the broadband UVA irradiance on a plane

surface (Watt/ m2). Measured irradiance is the result of the sum of direct solar

irradiance and of diffuse irradiance.

The radiometer can measure the UVA irradiance in closed room too.

The radiometer is produced in three versions:

LP UVA 02 PASSIVE*

LP UVA 02 AC ACTIVE , 4..20mA CURRENT output

LP UVA 02 AV ACTIVE , 0..1 or 0..5 or 0..10 V VOLTAGE output,

to be defined at the order.

* Using SICRAM Module VP 472 it is possible to connect passive pyranometer to

Indicator D09847.

2 Working Principle

LP UVA 02 radiometer is based on a solid state sensor, the spectral match with the

desire curve is obtain using special filter. The relative spectral response is reported on

figure 1.

Fig1

In order to protect the diffuser from the dust, LP UVA 02 is equipped with a 50mm

glass dome.

The cosine low response is obtained with a particular shaped PTFE diffuser in

figure 2 the cosine error versus angle of incident is reported

1.00E-03

1.00E-02

1.00E-01

1.00E+00

290 310 330 350 370 390 410

Lambda (nm)

Relative Spectral response

- 3 -

Fig.2

The good cosine low response of LP UVA 02 allow to use the radiometer at any

sun ‘s zenithangle .

3 Installation and Mounting of the Radiometer for the

Measurement of Global Radiation:

Before installing the radiometer, refill the cartridge containing silica-gel crystals.

Silica gel absorbs humidity in the dome chamber and prevents (in particular climatic

conditions) internal condensation forming on the internal walls of the domes and

measurement alteration.

Do not touch the silica gel crystals with your hands while refilling the cartridge. Carry

out the following instructions in an environment as drier as possible:

1- Loosen the three screws that fix the white shade disk

2- Unscrew the silica gel cartridge using a coin

3- Remove the cartridge perforated cap

4- Open the sachet containing silica gel (supplied with the radiometer)

5- Replace the silica gel crystals

6- Close the cartridge with its own cap, paying attention that the sealing O-ring be

properly positioned.

7- Screw the cartridge to the radiometer body using a coin

8- Check that the cartridge is screwed tightly (if not, silica gel life will be

reduced)

9- Position the shade disk and screw it with the screws

10- The radiometer is ready for use

-2

0 1020304050607080

Angle

Cosini error

- 4 -

Figure N.3 shows the operations necessary to fill the cartridge with the silica

gel crystals.

Fig. 3

•The LP UVA 02 radiometer has to be mounted in a readily accessible location

to clean the dome regularly and to carry out maintenance. At the same time, check that

no building, construction, tree or obstruction exceeds the horizontal plane where the

radiometer lays. If this is not possible, select a site where obstructions do not exceed 5

degrees of elevation, in the path followed by the sun, between earliest sunrise and

latest sunset. N.B The presence of obstructions on the horizon line significantly

affects the measurement of direct irradiance.

•The radiometer has to be located far from any kind of obstruction, which might

reflect sunlight (or sun shadow) onto the radiometer itself.

•The LP UVA 02 radiometer is provided with a spirit level for carrying out an

accurate horizontal leveling. The adjustment is made by means of two leveling screws

that allow to adjust the radiometer inclination. Use the two 6mm-diameter holes and a

65mm interaxial distance to mount the instrument on a plane. Remove the shade disk

to access the holes and reposition it after mounting (see fig. 4).

•The LP S1 mounting kit (figure 5), supplied on demand as an accessory, allows

an easy mounting of the radiometer on a mast. The mast maximum diameter shall not

exceed 50 mm. The operator shall take care that the mast height does not exceed the

radiometer plane to avoid measurement errors caused by any reflection or shadow of

the mast itself. To fix the radiometer to the mounting bracket, remove the shade disk

loosening the three screws, fix the radiometer, and mount the white shade disk again.

•It is suggested to thermally isolate the radiometer from its mounting brackets,

and to check that the electrical contact with the ground be done properly

Silica-gel cartridge

Perforated Cap

Sealed sachet of silic

Filling Closing the cartidge

LP G

LP SG

- 5 -

Spirit Level

104 mm

50.0 mm

65.0 mm

79.0 mm

D6 mm

165 mm LP UVA 02 AC

LP UVA 02 AV

LP UVA 02

Fixing holes

HD9906.47 HD9906.47.2

HD9906.46

HD9906.46.2

Fig 4

HD 2003.83

HD 2003.77C

HD 2003.77

HD 2003.79

HD 2003.85

HD 2003.84

Pyranometer LP UVA 02

with LP S1

LP S1

- 6 -

Fig.5

4 Electrical Connection and Requirements for Electronic

Readout Devices:

LP UVA 02 is produced in 3 versions, LP UVA 02, LP UVA 02 AC and LP UVA 02

AV.

•LP UVA 02 radiometer is passive and it does not require any power supply.

•LP UVA 02 AC, AV are active and need power supply.

Required voltage is as follows:

8-30 Vcc for LP UVA 02 AC and LP UVA 02 AV with 0..1V and 0..5V autput

supply.

14-30 Vcc for LP UVA 03 AV with 0..10 V output.

•All version are supplied with a 4 pole connector.

•The optional cable is terminated with a connector at one end and it is made of

PTFE UV-proof. It is provided with 3 wires and a braided wire (shield). Cable colors

and connector poles are matched as follow (figure 6):

Fig.6

LP UVA 02

Connector Function Color

A Shield ( ) Black

B Vout (+) Red

C Vout (-) Blue

D Housing ( ) White

LP UVA 02 AC

Connector Function Color

A Shield ( ) Black

B Positive (+) Red

C Negative (-) Blue

D Housing ( ) White

LP UVA 02 AV

Connector Function Color

A Shield ( ) Black

B (+) Vout Red

C (-) Vout e (-)Vcc Blue

D (+) Vcc White

- 7 -

•The LP UVA 02 radiometer has to be connected either to a millivoltmeter or to

a data acquisition system with input resistance > 5MΩ. Typically, the radiometer

output signal does not exceed 100 mV. In order to better exploit the radiometer

features, the readout instrument should have a 1μV resolution.

fig. 7

•LP UVA 02 AC is to be connected to a DMM and a power supply as show below

(Figure 8).To read the signal, the load resistance must be ≤500Ω

LP UVA 02 AC

+Vcc

I out

Power Supply

DMM

Fig. 8

•LP UVA 02 AV is to be connected to a DMM and a power supply as show below

(Figure 9). To read the signal, the load resistance must be ≥100kΩ

LP UVA 02 AV

+Vout

-Vcc,

- Vout

Power Supply

DMM

+ Vcc

Fig. 9

Blue Red

Screeno (Black)

- 8 -

5 Maintenance:

It is important to keep the outer glass dome clean to grant measurement best accuracy.

Consequently, the more the dome will be kept clean, the more measurements will be

accurate. Washing can be made using water and standard papers for lens, or, in some

cases, using pure ethyl alcohol. After using alcohol, clean again the dome with water

only.

Because of the high rise/fall in temperature between day and night, some condensation

might appear on the radiometer dome. To minimize the condensation growth, the

radiometer is provided with a cartridge containing dessicant material: Silica gel. The

efficiency of the Silica gel crystals decreases in the course of time while absorbing

humidity. Silica gel crystals are active when their color is yellow, while they turn blue

as soon as they loose their power. Read instructions at paragraph “3” about how to

replace them. Silica gel typical lifetime goes from 2 to 6 months depending on the

environment where the radiometer works.

6 Calibration and Measurements:

LP UVA 02

The radiometer S sensitivity (or calibration factor) allows to determine the irradiance

by measuring a signal in Volts at the ends of the resistance which short-circuits the

terminals of the photodiode ends. The S factor is measured in μV/(Wm-2).

Once the difference of potential (DDP) has been measured at the ends of the sensor,

the Eeirradiance is obtained applying the following formula:

Ee= DDP/S

Where:

Ee: is the Irradiance expressed in W/m2,

DDP: is the difference of potential expressed in μV and measured by the

multimeter,

S: is the calibration factor in μV/(W/m2) shown on the radiometer label

(and mentioned in the calibration report) .

LP UVA 02 AC

The radiometer sensitivity is set so that:

4..20 mA = 0..200 W/m2

To obtain irradiance the following procedure is to be applied:

-once you know the current ( Iout) absorbed by the instrument and measured with

the DMM, following formula must be applied:

(

)

mAIe out

E45.12

−

⋅

where;

Ee: Irradiance in W/m2,

Iout: current in mA absorbed by the radiometer

- 9 -

LP UVA 02 AV

The pyranometer sensitivity is set so that according to the version:

0..1 V = 0..200 W/m2

0..5 V = 0..200 W/m2

0..10 V = 0..200 W/m2

To obtain irradiance the following procedure is to be applied:

-once you know the instrument output voltage (Vout) measured with the DMM,

following formula must be applied:

oute VE

⋅

=200 for the version 0…1 V

oute VE

⋅

=40 for the version 0…5 V

oute VE

⋅

=20 for the version 0…10 V

where;

Ee: Irradiance in W/m2,

Vout: Output voltage (in Volt) measured by the voltmeter

Radiometers are factory calibrated one by one and they are marked by their own

calibration factor.

The calibration is carried out following procedure N° DHLF-E-59. This procedure is

used in the SIT calibration center N° 124 for the calibration of UVA radiometer.

The calibration was performed by reference to Delta Ohm srl primary standard with

monochromatic light at 365 nm obtained separating the emission line of a Xe-Hg lamp

with an inferential filter. To get best performances from your LP UVA 02 it is strongly

recommended that the calibration be checked annually.

At the moment no international agreement exist for the calibration of this kind

of radiometer, so the calibration coefficient is dependent from the calibration

procedure like reported in the following article:

“Source of Error in UV Radiation Measurements “, T. C. Larason, C. L.

Cromer on “Journal of Reaserch of the National Institute of Standards and

Technology” Vol. 106, Num. 4, 2001. (The article is free on the NIST’s WEB

site at the following address : http://www.nist.gov/jers)

- 10 -

7 Technical Specifications:

Typical sensitivity: 150 ÷350μV/(W/m2) LP UVA 02

4..20 mA (0-2000 W/m2) LP UVA 02AC

0..1,5,10V (0-2000 W/m2) LP UVA 02AV

Response time: <0.5 sec (95%)

Impedance: 5 ÷7.5 KΩ

Measuring range: 0-1000 W/m2

Viewing angle: 2πsr

Spectral range: 327 nm ÷384 nm (1/2)

312 nm ÷393 nm (1/10)

305 nm ÷400 nm (1/100)

Operating temperature: -40 °C ÷80 °C

Cosine response: < 8 % (tra 0° e 80°)

Long-term non-stability: <⏐±3⏐%

(1 year)

Non-linearity: <1 %

Temperature response: < 0.1%/°C

Dimensions: figura 4

Weight: 0.90 Kg

Ce manuel convient aux modèles suivants

Table des matières

Autres manuels Delta OHM Instrument de mesure

Delta OHM

Delta OHM HD2302.0 Manuel utilisateur

Delta OHM

Delta OHM HD2015 Manuel utilisateur

Delta OHM

Delta OHM HD2010UC Manuel utilisateur

Delta OHM

Delta OHM HD2003 Manuel utilisateur

Delta OHM

Delta OHM HD2102.1 Manuel utilisateur

Delta OHM

Delta OHM HD2402 Manuel utilisateur

Delta OHM

Delta OHM LPPYRHE16 Manuel utilisateur

Delta OHM

Delta OHM TP32MTT.03 Manuel utilisateur

Delta OHM

Delta OHM HD2124.1 Manuel utilisateur

Delta OHM

Delta OHM HD2302.0 Manuel utilisateur

Delta OHM

Delta OHM HD2070 Manuel utilisateur

Delta OHM

Delta OHM HD2030MSP Manuel utilisateur

Delta OHM

Delta OHM HD 8706-R1 Manuel utilisateur

Delta OHM

Delta OHM HD2010UC/A Manuel utilisateur

Delta OHM

Delta OHM HD 2020 Manuel utilisateur

Delta OHM

Delta OHM HD2102.1 Manuel utilisateur

Delta OHM

Delta OHM HD2303.0 Manuel utilisateur

Delta OHM

Delta OHM HD2011NMT Manuel utilisateur

Delta OHM

Delta OHM HD21ABE Manuel utilisateur

Delta OHM

Delta OHM HD2301.0R Manuel utilisateur

Delta OHM

Delta OHM HD2101.1 Manuel utilisateur

Delta OHM

Delta OHM HD 98569 Manuel utilisateur

Delta OHM

Delta OHM HD 9213-R1 Manuel utilisateur

Delta OHM

Delta OHM HD 2013 Series Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur