Related Manuals for DeltaOHM HD2402
Summary of Contents for DeltaOHM HD2402
- Page 1 English Operating manual Photo-Radiometer / Dosimeter A.O.R. HD2402 Companies / Brands of GHM www.deltaohm.com Keep for future reference.
- Page 2 HD2402 Photo-Radiometer / A.O.R. Dosimeter - 2 - HD2402 V1.4...
- Page 3 15. Connection for fixing the instrument to the tripod ATTENTION ! WHEN SWITCHING ON THE LASER, DO NOT EXPOSE EYES OR SKIN TO THE LASER DIRECT RADIATION. WHEN THE LASER IS SWITCHED ON, MAKE SURE THAT NO ONE CROSSES INADVERTEDLY THE LASER BEAM - 3 - HD2402 V1.4...
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Page 4: Table Of Contents
7.3 Spectral interval 300-700nm .............. 47 7.4 Spectral interval 380-1400nm............. 48 7.5 Spectral interval 780-1400nm............. 48 7.6 Spectral interval 380-3000nm............. 49 8 SENSOR CALIBRATION .................50 9 TECHNICAL SPECIFICATIONS ...............51 10 STORAGE .....................53 11 SAFETY INSTRUCTIONS ................53 12 ORDER CODES ..................54 - 4 - HD2402 V1.4... -
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 CP24H 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 Wavelength, expressed in nanometers [nm]; Δλ Bandwidth, expressed in nanometers [nm], of calculation or measurement intervals; (λ), Spectral radiance of the source, expressed in watts per square meter per λ steradian per nanometer [W/(m sr nm)]; λ - 6 - HD2402 V1.4...
- Page 7 Limits depend on the wavelengths of the analyzed light and on the kind of injury to be taken into consideration. Also the physical quantities of interest (irradiance [W/m ], radiance [W/(m sr)]) differ depending on the kind of injury to be taken into consideration. - 7 - HD2402 V1.4...
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Page 8: Radiometry Overview
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. - 9 - HD2402 V1.4... - Page 10 Figure 3: luminous efficacy curve for the photopic vision The photopic vision curve represents the luminous efficacy of the human eye under daylight conditions (in lowlight conditions, the response curve of the human eye changes, and we talk about a scotopic vision). - 10 - HD2402 V1.4...
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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 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) - 12 - HD2402 V1.4...
- Page 13 > 1 000 s 0,25 380-3 000 = 20 000 t H: [J m skin burn skin (Visible, IRA for t < 10 s t: [seconds] and IRB) Table 4: exposure limit values for non-coherent radiations - 13 - HD2402 V1.4...
- 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).
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Page 15: Installation Of The Instrument
PC, Windows® operating system automatically recognizes the instru- ment as an HID (Human Interface Device) device and uses the drivers already in- cluded in the operating system. - 15 - HD2402 V1.4... -
Page 16: Description Of Operation
(option Open Project). Open…icon: allows to open data files or reports regarding measurements that have already been performed or saved in the folders Logging and Reports in the prede- fined folder (preset in C:\DL13_HD2402 but user changeable). - 16 - HD2402 V1.4... - Page 17 The instrument saves data every second. Up to 96000 samples can be stored, that are equivalent to 26 hours of continuous acquisition. Memory is cyclic, so data are overwritten starting from the older sample, once the available space is depleted. - 17 - HD2402 V1.4...
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Page 18: Management Of A Measurement Campaign With Deltalog13
The preset scale is in light blue color. All scales are factory preset to AUTO (auto- matic). Scales for each channel can be set manually, by mouse-clicking on the desired scale (the smallest bar indicates the full sensitivity scale). - 18 - HD2402 V1.4... -
Page 19: Logging Mode
Select the Auto-Start enable box, set logging start date/time in the Auto-Start Log- ging line (start time must be subsequent to the current time indicated in the PC Clock line by at least 20 minutes), set log duration in the Duration of Logging field - 19 - HD2402 V1.4... -
Page 20: Download Of The Measurements Stored In The Pc
The start/stop time for each log is displayed. Select logs to be downloaded and press the Dump LOG icon. Data are saved in the Logging folder, in the predefined folder; files will be identified by the logging start/stop time. - 20 - HD2402 V1.4... -
Page 21: Data Analysis And Evaluation Report
The program asks to enter a description of the source and the place where it is posi- tioned, enter the requested info and press OK, the entered data appear in the right panel. In the left panel, the source appears among the project items. - 21 - HD2402 V1.4... - Page 22 If the From File option has been selected, a window will appear where to search for the log file; select the desired file and press Open. After choosing the data origin, by selecting a measurement file associated to a source, the following window will appear. - 22 - HD2402 V1.4...
- Page 23 It is possible to keep memory of the selection saving it in the project, by pressing the Save icon. After the saving, the selection will appear with a gold background. Only the - 23 - HD2402 V1.4...
- Page 24 Delete Source or Delete Measure- ment. Details concerning the setting of geometrical parameters and calculation of exposure limit values requested by the L.D. 81/08 and specified in the tables in the right upper panel are explained below. - 24 - HD2402 V1.4...
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Page 25: Geometrical Parameters
W/m F is the geometric parameter in steradians, as described at paragraph 2.2 at page 9. If the non rigorous calculation option (suitable for small angles) was selected, F=Ω in all the mentioned cases. - 25 - HD2402 V1.4... -
Page 26: Luxmeter Table
Alpha angle obtained from geometric parameters is below 100mrad. If the Include in Report box is selected, the data in the table will be included in the fi- nal report. - 26 - HD2402 V1.4... - Page 27 Time in hours/minutes/seconds for exceeding 10000 J maximum daily dose calculated starting from the irradiance mean value. If the Include in Report box is selected, the data in the table will be included in the fi- nal report. - 27 - HD2402 V1.4...
- Page 28 11mrad). o t_100 [s] time period during which a source can be observed without damages to the visual system. - 28 - HD2402 V1.4...
- Page 29 (11mrad) [W/(m² sr)] radiance calculated assuming that the source has an angular dimension of 11mrad. (1.7mrad) [W/(m² sr)] radiance calculated assuming that the source has an angular dimension of 1.7mrad. (real) [W/(m² sr)] is the real radiance calculated starting from the entered geometric parameters. - 29 - HD2402 V1.4...
- Page 30 This value is calculated with the following procedure: if L < 100 then t_lim > 10000s B_real (d index satisfied) if Alpha ≥ 100mrad ⇒ otherwise = 10 B_real (c index satisfied) - 30 - HD2402 V1.4...
- Page 31 (11mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 11mrad. (1.7mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 1.7mrad. (real) [W/(m² sr)] real radiance calculated starting from the entered geomet- ric parameters. - 31 - HD2402 V1.4...
- Page 32 This value is calculated with the following procedure: if L < 100 then t_lim > 10000s B_real (d index satisfied) if Alpha ≥ 100mrad ⇒ otherwise t_lim = 10 B_real (c index satisfied) - 32 - HD2402 V1.4...
- Page 33 ] (corresponding to the instant value if a single sam- ple is taken into consideration, and to the mean value if several samples are taken into consideration). • Alpha angle in degrees, it is the angle under which the analyzed source is seen. - 33 - HD2402 V1.4...
- Page 34 Omega = 2π(1-cos(Alpha/2)) (100mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 100mrad. (1.7mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 1.7mrad. - 34 - HD2402 V1.4...
- Page 35 ⇒ t > 10s (g limit satisfied) • R_real if 2.8 ≤ L ≤ 8.89 ⇒ t_lim = (5 [s] (h limit satisfied) • • • R_real R_100 if 8.89 ≤ L ⇒ t_lim < 10μs (i limit) • r_real - 35 - HD2402 V1.4...
- Page 36 (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. This value is calculated with the following procedure: - 36 - HD2402 V1.4...
- Page 37 ⇒ t_lim < 10μs (i limit) • R_1.7 The exposure limit time in seconds is displayed aside radiance values. If the Include in Report box is selected, table data will be included in the final report. - 37 - HD2402 V1.4...
- Page 38 [s] exposure limit time, that is the time period during which a source can lim100 be observed without damages to the visual system. This value is calculated with the following procedure (all radiance values are expressed in [W m - 38 - HD2402 V1.4...
- Page 39 6 /Alpha ≤ L ≤ 8.89 /Alpha ⇒ t_lim = (5 Alpha)) • • • • R_real R_real (k limit satisfied) if 8.89 /Alpha ≤ L ⇒ t_lim < 10μs (l limit) • R_real - 39 - HD2402 V1.4...
- Page 40 • Side d1 [m] - Side d2 [m] – Distance R [m]: o Alpha_1 [rad] angle subtended by the source along side d1 (see following table). o Alpha_2 [rad] angle subtended by the source along side d2 (see following table). - 40 - HD2402 V1.4...
- Page 41 • Diameter d [m] – Distance R [m]: o Alpha [rad] angle subtended by the source. o Omega [sr] solid angle subtended by the source. (100mrad) [W/(m² sr)] radiance calculated assuming that the source angular dimension is 100mrad. - 41 - HD2402 V1.4...
- Page 42 ⇒ t_lim < 10μs (l limit) • R_real The exposure limit time in seconds is displayed aside radiance values. If the Include in Report box is selected, table data will be included in the final report. - 42 - HD2402 V1.4...
- Page 43 “n” limit, in particular: t_lim=(18000/ E If the Include in Report box is selected, the data in the table will be included in the fi- nal report. - 43 - HD2402 V1.4...
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Page 44: Notes Table
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 Green box = risk index not exceeded Yellow box = risk index with limited exposure time Red box = risk index exceeded - 44 - HD2402 V1.4... - Page 45 > 10s t_lim < 10s t_lim > 1000s t_lim < 1000s t_lim > 1000s t_lim < 1000s t_lim > 10s t_lim < 10s Table 6: correspondence between evaluation of risk indexes and exposure time - 45 - HD2402 V1.4...
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Page 46: Spectral Characteristics
S(λ). 1.0E+00 1.0E-01 1.0E-02 1.0E-03 1.0E-04 1.0E-05 1.0E-06 Lambda(nm) Figure 7: comparison between spectral response curve obtained by the combina- tion of channels (in purple color) and weighting curve S(λ) (in black) - 46 - HD2402 V1.4... -
Page 47: Spectral Interval 315-400Nm (Uva)
B(λ). 1.0E+00 1.0E-01 1.0E-02 1.0E-03 1.0E-04 1.0E-05 Lambda(nm) Figure 9: comparison between spectral response curve obtained by the combina- tion of channels (in purple color) and weighting curve B(λ) (in black) - 47 - HD2402 V1.4... -
Page 48: Spectral Interval 380-1400Nm
R(λ). 1.0E+01 1.0E+00 1.0E-01 1.0E-02 1.0E-03 1000 1100 1200 1300 Lam bda(nm ) Figure 11: comparison between spectral response curve obtained by the combi- nation of channels (purple color) and weighting curve R(λ) (in black) - 48 - HD2402 V1.4... -
Page 49: Spectral Interval 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. - 49 - HD2402 V1.4... -
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
0 ÷ 3.999 W/m 0 ÷ 39.99 W/m Measurement of ultraviolet irradiance in the spectral range UVA (315÷400 nm) 0 ÷ 3.999 W/m 0 ÷ 39.99 W/m 0 ÷ 399.9 W/m 0 ÷ 3.999 • - 51 - HD2402 V1.4... - Page 52 λ tral weighting factor R( 0 ÷ 3.999 W/m 0 ÷ 39.99 W/m 0 ÷ 399.9 W/m 0 ÷ 3.999 • Measurement of infrared irradiance, in the spectral range 400÷2800 nm 0 ÷ 3.999 • - 52 - HD2402 V1.4...
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Page 53: 10 Storage
User obligations The user of the instrument shall make sure that the following rules and directives con- cerning hazardous materials are observed: CE directives on safety at work Local lows on safety at work Accident-prevention regulations - 53 - HD2402 V1.4... -
Page 54: 12 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. CP24H 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 56 This guarantee must be sent together with the instrument to our service centre. IMPORTANT: Guarantee is valid only if coupon has been correctly filled in all details. HD2402 Instrument Code: Serial Number...
- Page 57 Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | info@deltaohm.com The quality level of our instruments is the result of the constant development of the product. This may produce some differences between the information written in this manual and the instrument you have purchased.
- Page 58 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | info@deltaohm.com V1.4 05/02/2019...