GHM DeltaOHM LPPHOT01 Manuel utilisateur

Operating manual

Photometric

/radiometric probes

LPPHOT01

– LPPAR01 –

LPRAD01

LPUVA01

–LPUVB01 –LPUVC01

www.deltaohm.com

English

Ke ep for fut ure reference .

TABLE OF CON TEN TS

1I NTROD UCTI ON .................................................................................................... 3

2PRO BES TECH N I CAL CH ARACTERI STI CS ............................................................... 4

2.1 LPPHOT01 ....................................................................................................... 4

2.2 LPRAD01 ........................................................................................................ 6

2.3 LPPAR01 ......................................................................................................... 7

2.4 LPUVA01 ........................................................................................................ 8

2.5 LPUVB01 ........................................................................................................ 9

2.6 LPUVC01 ...................................................................................................... 10

3I N STALLATI ON ................................................................................................... 11

3.1 ELECTRI CAL CONNECTI ONS ............................................................................ 11

4MEASUREM EN T ................................................................................................... 12

5SAFETY I N ST RUCTI O N S ...................................................................................... 13

6ORDERI N G COD ES .............................................................................................. 14

1 I N TRODUCTI ON

The probes of t he series LP…01 allow m easurem ent of phot om et ric and r adiom et ric

quant it ies such as illum inance ( lu x) , ir radiance ( W/ m 2) across VI S-NI R, UVA, UVB,

UVC spect ral regions, t he num ber of phot ons per t im e unit and ar ea in t he PAR region

( 400 nm …700 nm ) .

I n probes LP….01 there is no need for external power supply. The out put signal in m V

is given t hrough a r esist or shunt ing t he phot odiode ends. The photocurrent generated

by the phot odiode when hit by light, is convert ed to a pot ent ial difference, which is

read by a volt m et er. Once t he DDP ( Pot ent ial Difference) is known, t he m easured val-

ue can be calculat ed t hrough t he calibrat ion fact or.

Ea ch p rob e is in div idu a lly ca lib r at e d. Th e se nsit iv it y fa ct or is m a r k ed on t h e

housin g of t he probe a nd is spe cific t o t h at pr obe .

LPPHOT01 and LPPAR01 probes are equipped wit h cosine cor rect ed diffuser .

LP…01 probes are su it a ble for in door a pplica t ion s which requires t he const ant

m onit or ing of t he quant it ies specified.

The output signal can be am plified or converted into a 4…20 m A or 0…10 Vdc signal

by using a convert er of t he series HD978TR3 ( 4…20 m A) or HD978TR4 (0…10 Vdc) for

DI N rail at t achm ent , or t he wall m ount ing t ypes HD978TR5 ( 4.…20 m A) and

HD978TR6 (0…10 Vdc) .

2 PROBES TECH N I CAL CH ARACTERI STI CS

All probes are com posed of a photodiode, a filt er, a diffuser, t he case and a 5 m et ers

cable allowing the connect ion of the probe t o t he reading instrum ent .

The t ypical var iat ion of pr obe sensit iv it y w it h t em perat ure var iat ion is -0.1% / oC. The

sensit ivity factor shown on t he probe was obt ained in an air-condit ioned env ironm ent

at an am bient t em perat ure of 23 ° C and relat ive hum idit y 50 ±10 % .

2 .1 LPPH OT 0 1

The LPPHOT01 probe ( class B luxm et er ) m easures

illu m inan ce ( lux ) defined as the r at io bet ween t he

lum inous flux ( lum en) passing t hrough a surface and t he

surface area ( m 2) .

The spect ral response curve of a phot om et ric probe is

equal t o the one of the hum an eye, known as st andard

phot opic cur ve V( λ) .

The difference in spectral response bet ween LPPHOT01 and

t he st andard phot opic cur ve V( λ) is calculat ed by m eans of

the error f1’.

Ph ot om e t ric ch ar act e r ist ics

The spect ral response curve of the LPPHOT01 probe is shown in t he following graph

toget her wit h t he standard phot ot ypical curve.

The calibrat ion of t he pr obe is perform ed by com paring it t o a lux m et er calibr at ed by

a Prim ary Met rological I nst it ut e. The calibrat ion procedure follows t he CI E publicat ion

No 69 ( 1987) “ Met hod of Char act er izing I llum inance Met er s and Lum inance Met er s”

and is carried out by illum inat ing t he probe wit h a st andard illum inant A.

The illum inant A is a reference incandescent lam p wit h a colour t em perat ure of

2856K.

Sp ect r al resp onse

The follow ing figur e show s t he t r end of t he deviat ion fr om t he cosine law as t he angle

varies for t he LPPHOT01 probe:

Te chn ica l spe cifica t ion s

Ty pica l se n sit iv it y 0.5…1.5 m V/ klux

M e a su r in g r an ge 0…200000

Sp ect r a l r an ge V( λ)

Ca lib r a t ion a ccu r a cy < 4%

f’1( V ( λ) m a t ch e r ro r) < 6%

f2( cosin e r e sp on se / d ir e ct ion a l e r r or )

< 3%

f3( lin e a r it y ) < 1%

F5( fa t igu e) < 0.5%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 0.5…1 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

-5

010 20 30 40 50 60 70 80

Angle of incidence (degrees)

Error %

2 .2 LPRAD0 1

The LPRAD01 probe m easures ir r adian ce ( W/ m 2) defined as

t he r at io bet ween t he flow of energy ( W) crossing a sur face and

t he area of t he sur face considered ( m 2) in t he spect ral region of

the VI S-NI R ( 400 nm …1050 nm ) .

Ph ot om e t ric ch ar act e r ist ics

The spect ral response curve of the LPPOHT01 probe is shown in

t he follow ing gr aph t oget her w it h t he st andar d phot ot ypical

curve.

Pr obe calibrat ion is carried out by using 577/ 579 nm lines of a Xe-Hg lam p, filtered

t hr ough a special int er fer ent ial f ilt er. The t em perature has a negligible influence on

the spect ral response of the probe.

Te chn ica l spe cifica t ion s

Ty pica l se n sit iv it y 2.6 μV/ μW/ cm -2

M e a su r in g r an ge 0…200 m W/ cm 2

Sp ect r a l r an ge ≈400 nm …≈1050 nm

Ca lib r a t ion a ccu r a cy < 6%

f2( cosin e r e sp on se / d ir e ct ion a l e r r or ) < 6%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 1 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

Sp ect r al resp onse

2 .3 LPPAR0 1

The LPPAR01 probe m easures t he ratio bet ween t he num ber of

photons that st rike a surface in one second, in the 400

nm …700 nm spect ral range and the surface area ( m 2) . This

quant it y is defined as PAR: Ph ot osy nt h et ica lly Act iv e Ra dia -

t ion .

Ra diom e t r ic ch ar act e rist ics

The spect ral response curve of the LPPAR01 probe is shown in

the following graph:

The pr obe calibr at ion is carried out by using an halogen lam p, wit h a known spect ral

ir radiance in a specific spect ral range ( 400 nm …700 nm ) .

Te chn ica l spe cifica t ion s:

Ty pica l se n sit iv it y 30 μV/μmol·m- 2s- 1

M e a su r in g r an ge 0…5000 μmol·(m- 2s- 1 )

Sp ect r a l r an ge 400 nm …660 nm

Ca lib r a t ion a ccu r a cy < 6%

f2( co sin e r e sp on se / d ir e ct ion a l e r ro r) < 6%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 1 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

Sp ect r al resp onse

2 .4 LPU VA0 1

The LPUVA01 probe m easures ir radia n ce ( W/ m 2) defined as

t he rat io bet ween t he r adiant flux ( W) passing t hrough a sur-

face and the sur face area ( m 2) in the UVA ( 3 1 5 nm …4 0 0

nm ) spect ral range. Thanks t o a new t y pe of phot odiode,

LPUVA01 is blind t o visible and infrared light.

Ra diom e t r ic ch ar act e rist ics

The spectral response curve of the LPUVA01 probe is shown

in t he follow ing graph:

The calibrat ion is perform ed by reference t o our prim ary st andar d wit h m onochrom at ic

light at 365 nm obtained separat ing t he em ission line of a Xe-Hg lam p w it h an infer-

ential filt er. To get best per form ances from your LPUVA01 it is st rongly recom m ended

that t he calibrat ion be checked annually. The t em perature has a negligible influence

on the spect ral response of t he probe.

Te chn ica l spe cifica t ion s

Ty pica l se n sit iv it y 2.6 μV/μW/cm- 2

M e a su r in g r an ge 0…200 m W/ cm 2

Sp ect r a l r an ge peak at ≈360 nm and FWHM 60 nm

Ca lib r a t ion a ccu r a cy < 6%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 1 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

Sp ect r al resp onse

2 .5 LPUVB0 1

The LPUVB01 probe m easures irr a dia nce ( W/ m 2)

defined as t he r at io bet ween t he radiant flux ( W)

passing t hr ough a sur face and t he surface area ( m 2)

in t he UVB ( 2 8 0 nm …3 1 5 nm ) spe ct ral ran ge .

Thanks t o the use of a new type of phot odiode, the

LPUVB01 probe is blind to visible and infrar ed light .

Ra diom e t r ic ch ar act e rist ics

The spect ral response curve of t he LPUVB01 probe is

shown in t he following graph:

Pr obe calibrat ion is car ried out by using a 313 nm line of a Xe-Hg lam p, filt ered

t hr ough a special int erfer ent ial filt er. Measur em ent is car ried out by com par ison w it h

the prim ary st andards, assigned to Delt a OHM Metrological Laborat ory.

Te chn ica l spe cifica t ion s

Ty pica l se n sit iv it y 0.19 μV/(μW/cm2)

M e a su r in g r an ge 0…200 m W/ cm 2

Sp ect r a l r an ge peak at ≈305 nm and FWHM 31 nm

Ca lib r a t ion a ccuracy < 8%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 2 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

Sp ect r al resp onse

2 .6 LPU VC0 1

The LPUVC01 probe m easur es irr adiance ( W/ m 2) defined as

the ratio bet ween the radiant flux ( W) passing t hrough a sur-

face and t he surface area ( m2) in the UVC ( 2 0 0 n m …2 8 0

nm ) spectr al ra n ge. Thanks to t he use of a new t ype of pho-

todiode, the LPUVC01 probe is blind t o visible and infrared

light .

Ra diom e t r ic ch ar act e rist ics

The spect ral response curve of t he LPUVC01 probe is shown in

the following graph:

The pr obe calibr at ion is carried out by m easur ing irradiance com ing from an Hg lam p

at 254 nm .

Te chn ica l spe cifica t ion s

Ty pica l se n sit iv it y 0.25 μV/(μW/cm2)

M e a su r in g r an ge 0…200 m W/ cm 2

Sp ect r a l r an ge peak at 260 nm and FWHM 32 nm

Ca lib r a t ion a ccu r a cy < 10%

Ope rat in g t e m pe rat u re 0…50° C

Ou t pu t im p eda n ce 2 kΩ

D im e n sio ns Ø 30 m m x 38 m m height

Sp ect r al resp onse

Ce manuel convient aux modèles suivants

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