Delta OHM HD2402 Manual
  1. Manuals
  2. Brands
  3. Delta OHM Manuals
  4. Measuring Instruments
  5. HD2402
  6. Manual

Delta OHM HD2402 Manual

Photo-radiometer / dosimeter for non-coherent artificial optical radiations (a.o.r.) measurement
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
REV. 1.1
29/11/2010
HD2402
Photo-Radiometer / Dosimeter
for non-coherent artificial optical
radiations (A.O.R.) measurement
ENGLISH
Our instruments' quality level is the results of the continuous development of our
products. This can cause differences between the information written in this manual
and the instrument that you have purchased. We cannot totally 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.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the HD2402 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Delta OHM HD2402

Summary of Contents for Delta OHM HD2402

  • Page 1 REV. 1.1 29/11/2010 HD2402 Photo-Radiometer / Dosimeter for non-coherent artificial optical radiations (A.O.R.) measurement ENGLISH Our instruments’ quality level is the results of the continuous development of our products. This can cause differences between the information written in this manual and the instrument that you have purchased.
  • Page 2 HD2402 Photo-Radiometer / A.O.R. Dosimeter...
  • Page 3 FRONT LASER LED Radiometric sensor for the measurement of UV band (220÷400 nm) Radiometric sensor for the measurement of NIR band (700÷1300 nm) Not used Radiometric sensor for the measurement of UVA band (315÷400 nm) Photometric sensor for the measurement of visible radiation (Luxmeter) Radiometric sensor for the measurement of BLUE band (400÷600 nm) Not used Thermopile sensor for the measurement of NIR-FIR band (400÷2800 nm)

  • Page 4: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ..................5 RADIOMETRY OVEROBSERVATION............8 2.1 Irradiance ...................8 2.2 Radiance.....................9 OPERATING PRINCIPLE ................. 11 INSTRUMENT INSTALLATION..............15 4.1 Connection to a PC ................15 DESCRIPTION OF OPERATION ............... 16 MANAGEMENT OF A MEASUREMENT CAMPAIGN WITH DELTALOG13 ..18 6.1 Setting measurement scales ..............

  • Page 5: Introduction

    Thermopile sensor for the measurement of infrared radiance, 400÷2800 nm spectral range. HD2402 unit can be powered through connection to the USB port of a PC, or through an external power supply unit provided with an USB port (SWD05 code). The CP24 connection cable is provided with a M12 connector on the instrument side and with an A-type USB connector on the PC side or on the SWD05 power supply unit side.
  • Page 6 λ ∫ ∫ λ λ λ ) t , is only relevant in the range 180 to 400 nm) λ λ λ = 400 nm ∫ ∫ (λ, t) . dλ . dt is only relevant in the range 315 to 400 nm) λ...
  • Page 7 R (λ) Spectral weighting taking into account the wavelength dependence of the thermal injury caused to the eye by visible and IRA radiation [dimen- sionless]; Effective radiance (thermal injury): calculated radiance spectrally weighted by R(λ), expressed in watts per square meter per steradian per nanometer [W/(m sr)];...

  • Page 8: Radiometry Overobservation

    The foregoing exposition is far from being exhaustive, but will be useful to make the HD2402 unit operation known and to understand the approximations made by the in- strument for the calculation of the various radiometric quantities requested by L.D. No 81/08.

  • Page 9: Radiance

    Remark : for small angles, F is actually the solid angle under which the observer source is seen. By using this reduction, HD2402 unit allows to calculate the radiance of the irradiance measured values.
  • Page 10 Similar definitions apply to photometry where irradiance will be replaced by illumi- nance (lux) and radiance by luminance [cd/m λ More generally, the link between any spectral radiometric quantity GR( ) and the cor- responding photometric quantity GF is given by the following formula: ∫...

  • Page 11: Operating Principle

    By pressing the button, the LASER is switched on for 10 seconds. HD2402 is powered through the USB cable, when it is connected to a PC. The red indi- cator on the back of the instrument shows that the instrument is properly powered.
  • Page 12 1,0E+00 1,0E-01 1,0E-02 1,0E-03 1,0E-04 1,0E-05 Lambda (nm) Figure 4: Spectral weighting curve S(λ) (wavelengths below 200nm are not taken into consideration, as highly absorbed in air) 0.01 1000 1100 1200 1300 La m bda (nm ) Figure 5: Spectral weighting curve R(λ) Lambda (nm) Figure 6: Spectral weighting curve B(λ)
  • Page 13 Table 4 shows the 15 limit values to be calculated according to attachment 37 of L.D. 81/08. Index Wavelength nm Exposure limit value Units Comment Part of the body Hazard 180-400 = 30 [J m eye cornea photokeratitis (UVA, UVB and UVC) Daily value 8 hours conjunctiva conjunctivitis...
  • Page 14 The table shows how HD2402 channels are com- bined to obtain 13 of the requested 15 limits. Limits e , f are beyond the measure- ments achievable with the instrument and, on the other hand, are applied to particu- lar sources (typically, ophthalmology instruments).

  • Page 15: Instrument Installation

    4 INSTALLATION OF THE INSTRUMENT The instrument is provided with a single cable (cod. CP24 ), ending with a M12 con- nector at the instrument side and an A-type USB connector at the other end. The ca- ble is used both for connection to the external SWD05 power supply unit and for con- nection to a PC;...

  • Page 16: Description Of Operation

    5 DESCRIPTION OF OPERATION The instrument has two operation modes: • Instrument connected to the USB port of the PC and managed through the Delta- Log13 software The instrument is powered through the USB port of the PC. A short blink every 3 seconds of the rear LED indicates that the instrument is prop- erly powered.
  • Page 17 Start PC Log icon : starts manually logging measurements that will be directly saved in the PC. After starting logging, the icon changes in Stop PC Log , allowing to stop logging when desired. Start Logging icon : starts manually logging measurements that will be saved in the internal memory of the instrument.

  • Page 18: Management Of A Measurement Campaign With Deltalog13

    6 MANAGEMENT OF A MEASUREMENT CAMPAIGN WITH DELTALOG13 The chapter describes all steps needed to perform a measurement campaign, with the purpose to evaluate and analyze one or more sources and positions in the same place. A measurement campaign is performed through the following steps: 1.

  • Page 19: Logging Mode

    In case of doubt, it is advisable to select the AUTO setting, leaving to the instrument the most appropriate choice to use. Once a new scale is set, the Apply key must be pressed to activate the change. When pressing the Apply key, the setting of inputs is saved in the instrument and will re- main active even if the instrument is subsequently disconnected.

  • Page 20: Downloading Measurement Stored In The Pc

    (hh:mm:ss) . Select the Apply key to save the instrument settings, logging will auto- matically start at the set date/time. The instrument can also be disconnected from the PC and connected to the power supply unit. The rear LED blinks every 3 seconds until acquisition is started;...

  • Page 21: Data Analysis And Evaluation Report

    Please refer to the software manual or online help for details on the functions avail- able in the window containing the log list. 6.4 D ATA ANALYSIS AND EVALUATION REPORT Select the Project icon and then the New project item for the analysis of the data de- tected by the instrument.
  • Page 22 The right panel contains two additional columns: N. Measures Done (number of meas- ures performed on the source) and N. Measures Report (number of measures used to prepare the evaluation report). The column content is void for the moment and will be updated afterward, when some measurements will be associated to the source.
  • Page 23 The window is divided into five panels: • The panel with the project components (in the upper left side), where the log file is now present. • The panel with the selected file information (placed below the panel of the pro- ject components).
  • Page 24 measurements with a gold background will be considered in the final evaluation re- port. The evaluation can be performed using several consecutive measurements, selecting them by means of the SHIFT key on the PC keyboard (select the first measurement of the series, then keep the SHIFT key depressed and select the last measurement of the series), and pressing the Save icon.

  • Page 25: Geometric Parameters

    6.4.1 Geometrical parameters The instrument measures irradiance, while radiance value must be known for calculat- ing some exposure limit values (ELV). If geometric parameters are known, both quan- tities can be calculated (the solid angle subtended from source to sensor must be known) through calculation of the geometric parameter F.

  • Page 26: Luxmeter Table

    6.4.2 Luxmeter table The values measured by the luxmeter are displayed in the Luxmeter table. The data displayed in the table are: • Illuminance value in Lux (if a single sample is considered, the value corre- sponds to the instant value or, if several samples are taken into consideration, it corresponds to the mean value).

  • Page 27: 180-400 Table

    6.4.3 Table a. 180-400 Table a. 180-400 describes the exposure limit for parameter “ a ”. The displayed data are: • Effective irradiance value E [W/m ] (corresponds to the instant value if a sin- gle sample is considered, or to the mean value if several samples are consid- ered).

  • Page 28: 300-700 Table

    6.4.5 Table c.d. 300-700 Table c.d. 300-700 shows L exposure limit for parameters “ c ” and " d ”. The limit varies according to the source observation time and angular dimensions; consequently, different exposure limits correspond to different observation times and dimensions.
  • Page 29 If the preceding limit is not exceeded, t_100 will be above 10000s; if this is be- low, the succeeding limit will have to be taken into consideration. (11mrad) [W/(m² sr)] radiance calculated assuming that all light comes from a circular area whose angular dimension is 11mrad. This is true if the observation time is above 10s and below 100s;...
  • Page 30 o t_lim [s] exposure time limit, that is the time period during which the source can be observed with no problems to the visual system. This value is calculated with the following procedure: if L < 100 then t_lim > 10000s B_real (d index satisfied) if Alpha ≥...
  • Page 31 if L < 100 then t_lim > 10000s B_100 (d index satisfied) if 11mrad ≤ Alpha < 100mrad ⇒ otherwise t_lim = 10 B_real (c index satisfied) if L < 100 then t_lim > 10000s B_100 (d index satisfied) if Alpha < 11mrad ⇒ otherwise t_lim = 10 B_11 •...
  • Page 32 o t_lim [s] exposure time limit, that is the time period during which the source can be observed with no problems to the visual system. This value is calculated with the following procedure: if L < 100 then t_lim > 10000s B_real (d index satisfied) if Alpha ≥...

  • Page 33: 380-1400 Table

    if L < 100 then t_lim > 10000s B_100 (d index satisfied) if 11mrad ≤ Alpha < 100mrad ⇒ otherwise t_lim = 10 B_real (c index satisfied) if L < 100 then t_lim > 10000s B_100 (d index satisfied) If Alpha < 11mrad ⇒ otherwise t_lim = 10 B_11 The exposure time limit in seconds is displayed aside radiance values.
  • Page 34 • Alpha angle in radiants, equal to the previous but expressed in radiants. • Omega solid angle in steradians, it is the solid angle under which the analyzed source is seen. This angle is used for the calculation of luminance. This parameter is estimated based on the radiance value and not on irradiance;...
  • Page 35 (real) [W/(m² sr)] is the real radiance calculated starting from the entered geometric parameters. o t_lim [s] exposure time limit, that is the time period during which a source can be observed without damages to the visual system. This value is calculated with the following procedure (all radiance values are expressed in [W m if Alpha >...
  • Page 36 if 1.7mrad <Alpha < 100mrad it is assumed that C = Alpha α if L ≤ 2.8 /Alpha ⇒ t > 10s (g limit satisfied) • R_real if 2.8 /Alpha ≤ L ≤ 8.89 /Alpha ⇒ t_lim = (5 Alpha)) •...
  • Page 37 if Alpha > 100mrad it is assumed that C = 100 α if L ≤ 2.8 ⇒ t > 10s (g limit satisfied) • R_real if 2.8 ≤ L ≤ 8.89 ⇒ t_lim = (5 [s] (h limit satisfied) • •...

  • Page 38: 780-1400 Table

    6.4.7 Table j.k.l. 780-1400 Table j.k.l. 780-1400 shows L exposure limit for parameters “ j ”, “ k ”, “ l ”. The limit varies according to source observation time and to angular dimensions; con- sequently, different exposure limits correspond to different observation times and di- mensions.
  • Page 39 it is assumed that C =100 α if L < 6 ⇒ t_lim > 10s (j limit satisfied) • r_100 if 2.8 ≤ L ≤ 8.89 ⇒ t_lim = (5 (k limit satisfied) • • • r_100 r_100 if L <...
  • Page 40 if Alpha < 11mrad it is assumed that C = 11 α if L ≤ 5.45 ⇒ t > 10s (j limit satisfied) • R_11 if 5.45 ≤ L ≤ 8.08 ⇒ t_lim = (4.54 [s] (k limit satis- • •...
  • Page 41 Note: Alpha_1 and Alpha_2 values are those perceived by the visual system and are calculated starting from α_1, α_2 angles calculated uniquely from geometric pa- rameters. α _1, α _2 Alpha_1 Alpha_2 α_1>100, α_1>100 2 x Tan (d1/2R) 2 x Tan (d2/2R) 11≤α_1≤100, α_2>100 2 x Tan...
  • Page 42 (11mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 11mrad. (real) [W/(m² sr)] real radiance calculated starting from the entered geomet- ric parameters. o t_lim [s] exposure time limit, that is the time period during which a source can be observed without damages to the visual system.

  • Page 43: 380-3000 Table

    6.4.8 Table m.n.o. 380-3000 Table m.n.o. 380-3000 shows the exposure limits for parameters “ m ”, “ n ”, “ o ”. The displayed values are: • [W/m ] irradiance value (corresponding to the instant value if a single skin sample is taken into consideration, and to the mean value if several samples are taken into consideration).

  • Page 44: Notes Table

    6.4.9 Notes table The user can record at will any comments regarding each of the limits provided for in attachment 37 of L.D. 81/08 in the Notes table. 6.4.10 Report table The Report table sums up the exposure limit values for each risk index. In the Assessment column, the risk index state is indicated by means of colored boxes having the following significance: White box = risk index not determined...
  • Page 45 The following table describes the association between box color and exposure time for the different indexes. Exposure time (t_lim) Risk Green box Yellow box Red box index t_lim > 8h t_lim < 8h t_lim > 8h t_lim < 8h t_lim > 10000s t_lim <...

  • Page 46: Spectrum Features

    7 SPECTRAL CHARACTERISTICS Measurements of artificial optical radiations are conducted on a wide spectral interval ranging within 180nm and 3000nm. Different risk indexes are associated to different spectral intervals, depending on the kind of damage produced by the optical radiation on the exposed parts of the human body: eyes and skin.

  • Page 47: Spectral Interval 315-400Nm (Uva)

    7.2 S 315-400nm (UVA) PECTRAL INTERVAL No weighting is required by this spectral interval. The following figure shows the spectral response curve of the UVA channel. Lambda(nm) Figure 8: spectral response curve of UVA sensor 7.3 S 300-700nm PECTRAL INTERVAL This spectral interval must be evaluated with the weighting curve B(λ).

  • Page 48: Spectral Interval 380-1400Nm

    7.4 S 380-1400nm PECTRAL INTERVAL This spectral interval must be evaluated with the weighting curve R(λ). The following figure shows the comparison between the spectral response curve ob- tained by the combination of channels and weighting curve R(λ). 1.0E+01 1.0E+00 1.0E-01 1.0E-02 1.0E-03...

  • Page 49: Spectral Interval 380-3000Nm

    7.6 S 380-3000nm PECTRAL INTERVAL No weighting is required by this spectral interval. The following figure shows the spectral response curve of the pyranometer. 1000 10000 3000 Lam bda (nm ) Figure 12: spectral response curve of the pyranometer.

  • Page 50: Sensor Calibration

    8 SENSOR CALIBRATION Instruments are factory-calibrated and do not require any additional intervention by users. Each sensor in the HD2402 is individually calibrated in different modes. Luxmeter (Channel 6) , calibration is performed by comparison to the second-line reference luxmeter used at the Delta OHM metrological laboratory; the comparison is performed through an incandescent lamp operating at a color temperature of 2856K (illuminant A).

  • Page 51: Technical Specifications

    TECHNICAL SPECIFICATIONS Instrument Dimensions (L. x W. x H) 70x70x160 mm 75x75x160 mm with protection sleeve Weight 500 g Materials aluminum alloy rubber protection sleeve Operating conditions Operating temperature -5 … 50°C Storage temperature -25 … 65°C Working relative humidity 0 …...
  • Page 52 Measurement of irradiance in the spectral range 400÷700 nm (blue) with spectral λ weighting factor B( 0 ÷ 399.9 • 0 ÷ 3.999 W/m 0 ÷ 39.99 W/m 0 ÷ 399.9 W/m Measurement of infrared irradiance, in the spectral range 700÷1300 nm, with spec- λ...

  • Page 53: Storage

    10 STORAGE Instrument storage conditions: • Temperature: -25...+70°C. • Humidity: 10...90%RH non condensing. • In storing, avoid places where: Humidity is at high level. The instrument is exposed to direct sunlight. The instrument is exposed to a high temperature source. There are strong vibrations.

  • Page 54: Order Codes

    Hardware key for PCs with Windows® operating systems. connected to the USB port of a PC, enables the use of Delta- Log13 software with HD2402 instrument. CP24 Connection cable to a PC or power supply, with M12 connector on the instrument side and A-type USB connector on the PC/power supply side.
  • Page 55 DICHIARAZIONE DI CONFORMITÀ DEL COSTRUTTORE MANUFACTURER’S DECLARATION OF CONFORMITY rilasciato da issued by DELTA OHM SRL STRUMENTI DI MISURA DATA 2010/09/28 DATE Si certifica che gli strumenti sotto riportati hanno superato positivamente tutti i test di produzione e sono conformi alle specifiche, valide alla data del test, riportate nel- la documentazione tecnica.
  • Page 56 All DELTA OHM instruments are subject to accurate testing, and are guaranteed for 24 months from the date of purchase. DELTA OHM will repair or replace free of charge the parts that shall be deemed non effi- cient according to its own judgment within the warranty period. Complete replacement is excluded and no damage claims are accepted.

Table of Contents