LP PHOT 03 - LP RAD 03 - LP PAR 03 - LP UVA 03 - LP UVB 03 - LP PHOT 03S_1

LP PHOT 03 … LP PHOT 03S – Photometri and Radiometric Probes

LP PHOT 03, LP RAD 03, LP PAR 03, LP UVA 03, LP UVB 03, LP PHOT 03S – Photometri and Radiometric Probes With Output Signal In mV or Normalized 4÷20mA or 0÷10Vdc or RS485 MODBUS-RTU Output

Photo-radiometric probes with output signal in mV or standard output 4÷20mA or 0÷10Vdc.
The probes of the series LP…03 for outdoor use allow to measure photometric and
radiometric quantities such as: illuminance (lux), irradiance (W/m²) in the near ultraviolet
spectral region VIS-NIR, UVA, UVB, and the photon flow across the PAR region (400nm…700nm).
The probes with mV output do not require any power supply. The output signal is obtained
from a resistance that short-circuits the terminal of the photodiode. The ratio of generated
photocurrent to incident light power is converted into a Difference of Potential that can be
read by a voltmeter. Once the DDP (Difference of Potential) is known, the measured value can
be calculated through the calibration factor. All probes are individually calibrated and the
calibration factor is also shown on the probe housing. The probes with normalized output
current 4÷20mA or voltage 0÷10Vdc or RS485 MODBUS RTU output require external power
supply. The probe LP UVB 03 is available only with standard output voltage 0÷5Vdc and
requires external power supply. All probes of the series LP…03 are equipped with diffuser
for cosine correction and protection dome. M12 male 4-pole connector. Cables with female
connectors and with 2, 5 or 10m length available on request.

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Product Description

Photo-radiometric probes with output signal in mV or standard output 4÷20mA or 0÷10Vdc.
The probes of the series LP…03 for outdoor use allow to measure photometric and
radiometric quantities such as: illuminance (lux), irradiance (W/m²) in the near ultraviolet
spectral region VIS-NIR, UVA, UVB, and the photon flow across the PAR region (400nm…700nm).
The probes with mV output do not require any power supply. The output signal is obtained
from a resistance that short-circuits the terminal of the photodiode. The ratio of generated
photocurrent to incident light power is converted into a Difference of Potential that can be
read by a voltmeter. Once the DDP (Difference of Potential) is known, the measured value can
be calculated through the calibration factor. All probes are individually calibrated and the
calibration factor is also shown on the probe housing. The probes with normalized output
current 4÷20mA or voltage 0÷10Vdc or RS485 MODBUS RTU output require external power
supply. The probe LP UVB 03 is available only with standard output voltage 0÷5Vdc and
requires external power supply. All probes of the series LP…03 are equipped with diffuser
for cosine correction and protection dome. M12 male 4-pole connector. Cables with female
connectors and with 2, 5 or 10m length available on request.
LP PHOT 03
The probe LP PHOT 03 measures illuminance (lux), defined as the ratio between the luminous
flux (lumen) passing through a surface and the surface area (m2).
The spectral response curve of a photometric probe is similar to the human eye curve, known
as standard photopic curve V(λ). The difference in spectral response between LP PHOT 03 and
the standard photopic curve V(λ) is calculated by means of the error f’1. Calibration is carried
out by comparison with a reference luxmeter, calibrated by a Primary Metrological Laboratory.
The Calibration Procedure complies with the CEI publication No.69 “Methods of characterizing
illuminance meters and luminance meters: Performance characteristics and specifications,
1987”. The photometric measurement probe is designed for outdoor readings. CIE photopic
filter. Cosine correction filter and K5 glass dome. Output, according to the chosen configuration,
mV or normalized output 4÷20mA or 0÷10Vdc.

TECHNICAL SPECIFICATIONS:
Typical sensitivity: 0.5 ÷1.5 mV/(klux)
Spectral range: V(λ)
Calibration uncertainty: < 4%
f’1 (agreement with the standard curve V(λ)): <6%
f 2 (Cosine response) <3%
f 3 (linearity) <1%
Operating temperature: -20°C ÷ +60°C
Impedance: 0.5 ÷ 1.0 kΩ non-normalized version
Version with normalized output 4÷20mA: 4mA = 0 klux, 20mA = 150 klux
Version with normalized output 0÷10Vdc 0V = 0 klux, 10V = 150klux
Power supply: 10…30Vdc for version with normalized output 4÷20mA
15…30Vdc for version with normalized output 0÷10Vdc

LP RAD 03
LP RAD 03 probe measures irradiance (W/m²) defined as the ratio between the radiant flux (W)
passing through a surface and the surface area (m²) in the VIS-NIR (400nm- 1050nm) spectral
range. The probe is designed for outdoor readings.
Cosine correction filter and K5 glass dome. Output, according to the chosen configuration, in
μV per μW/cm² or 4÷20mA or 0÷10Vdc normalized output.
TECHNICAL SPECIFICATIONS
Typical sensitivity: 1÷2.5 μV/(μW/cm2)
Spectral range: 400nm ÷1050nm
Calibration uncertainty: <5%
f2 (cosine response): <3%
f3 (linearity) <1%
Operating temperature: -20°C ÷ +60°C
Impedance: 0.5 ÷ 1.0 kΩ (non-normalized version)
Version with normalized output 4÷20mA: 4mA = 0 W/m², 20mA = 2000 W/m²
Version with normalized output 0÷10Vdc 0V = 0 W/m², 10V = 2000 W/m²
Power supply: 10…30Vdc for version with normalized output 4÷20mA
15…30Vdc for version with normalized output 0÷10Vdc

 

ORDERING CODE
LP RAD 03: Radiometric probe for the measurement of irradiance, complete with K5 dome,
silica gel cartridge, 4-pole connector. Cable with female connector has to be ordered separately
Cables: CPM12 AA4…with cable length 2, 5 or 10 meters.

LP PAR 03
The probe LP PAR 03 measures the ratio between the number of photons that strike a surface
in one second, in the 400nm-700nm spectral range and the surface area (m²).
This quantity is defined as PAR: Photo-synthetically Active Radiation.
The probe calibration is carried out by using an halogen lamp, with a known spectral irradiance
in a specific spectral range. Temperature slightly affects the probe spectral response.
The probe is designed for outdoor readings. Cosine correction filter and K5 glass dome.
Output, according to the chosen configuration, in μV per μmol m-2s-1 or normalized outputs
4÷20mA or 0÷10Vdc.
TECHNICAL SPECIFICATIONS
Typical sensitivity: 1÷2.5 μV/(μmol(m-2s-1))
Typical spectral range: 400 nm ÷ 700 nm
Calibration uncertainty: <5%
f2 (cosine response): <3%
f3 (linearity) <1%
Operating temperature: -20°C ÷ +60°C
Impedance: 0.5 ÷ 1.0 kΩ non-normalized version
Version with normalized output 4÷20mA: 4mA = 0 μmol(m-2s-1), 20mA = 5000 μmol(m-2s-1)
Version with normalized output 0÷10Vdc: 0V = μmol(m-2s-1), 10V = 5000 μmol(m-2s-1)
Power supply: 10…30Vdc for version with normalized output 4÷20mA
15…30Vdc for version with normalized output 0÷10Vdc

ORDERING CODE
LP PAR 03 Radiometric probe for the measurement of the Photon flux in the PAR action
spectra, complete with K5 dome, silica gel cartridge, 4-pole connector. Cable with
female connector has to be ordered separately. Cables: CPM12 AA4 …with cable
length 2, 5 or 10 meters.

LP UVA 03
The LP UVA 03 probe measures irradiance (W/m²) defined as the ratio between the radiant flux
(W) passing through a surface and the surface area (m²) in the UVA (315 nm –400 nm) spectral
range. Thanks to a new type of photodiode, LP UVA 03 is blind to visible and infrared light.
Probe calibration is carried out by using a 365 nm line of a Xe-Hg, filtered through a special
interferential filter. Measurement is carried out by comparison with the primary standards,
assigned to Delta Ohm Metrological Laboratory. The probe is designed for outdoor readings.
Cosine correction filter and K5 glass dome. Output, according to the chosen configuration, in
μV per μW/cm² or 4÷20mA or 0÷10Vdc normalized output.
TECHNICAL SPECIFICATIONS
Typical sensitivity: 70÷200 μV/(W/m2)
Measuring range: 327÷384nm (1/2)
312÷393nm (1/10)
305÷400nm (1/100)
Peak: 365nm
Calibration uncertainty: <6%
f2 (cosine response): <6%
f3 (linearity) <1%
Operating temperature: -20°C ÷ +60°C
Impedance: 0.5 ÷ 1.0 kΩ non-normalized version
Version with normalized output 4÷20mA: 4mA = 0 W/m² 20mA = 200W/m²
Version with normalized output 0÷10Vdc : 0V = 0 W/m² 10V = 200W/m²
Power supply: 10…30Vdc for version with normalized output 4÷20mA
15…30Vdc for version with normalized output 0÷10Vdc.

ORDERING CODE
LP UVA 03: Radiometric probe for the measurement of the UVA irradiance, complete with K5
dome, silica gel cartridge, 4-pole connector . Cable with female connector has to be
ordered separately. Cables: CPM12 AA4 …with cable length 2, 5 or 10 meters.

LP UVB 03BLAV
The LP UVB 03BLAV probe measures global irradiance (W/m2) defi ned as the ratio between
the radiant fl ux (W) passing through a surface and the surface area (m2) in the UVB (280 nm
÷315 nm) spectral region. In particular, the spectral sensitivity is focused at 305 nm, with
a bandwidth (FWHM) of 5nm. The global irradiance is the result of the sum of direct solar
irradiance and of diffused irradiance incident on a planar surface. In the UVB spectral region,
unlike in the visible portion where the direct component prevails over the direct component,
the light is strongly diffused by the atmosphere and thus the two components are equivalent,
therefore is very important that the instrument is capable of measuring accurately both the
components. The probe is designed for outdoor readings. Cosine correction fi lter and Quartz
dome.
Typical output 0÷5Vdc.

TECHNICAL SPECIFICATIONS
Typical sensitivity: ≈6V/(W/m²)
Typical spectral range: 301nm ÷ 306nm (1/2)
295 ÷ 308.5nm (1/10)
290 ÷ 311.5nm (1/100)
Peak at 304nm
Calibration uncertainty: <6%
f2 (cosine response): <6%
f3 (linearity) <1%
Working temperature: -20 ÷ +60°C
Output: 0÷1W/m²
Power supply: 15..30Vdc

PURCHASING CODE
LP UVB 03BLAV: Radiometric probe for the measurement of the UVB irradiance, complete with
Quartz dome, 3 silica gel cartridges, 8-pole M12 connector, calibration report. Cable
with female connector has to be ordered separately. Cables: CPM12 AA8 …, with
cable lengths 2, 5 or 10 meters.

ACCESSORIES
CPM12 AA4.2: 4-pole cable. Length 2m. 4-pole M12 connector on one end, open wires on
the other side.
CPM12 AA4.5: 4-pole cable. Length 5m. 4-pole M12 connector on one end, open wires on
the other side.
CPM12 AA4.10: 4-pole cable. Length 10m. 4-pole M12 connector on one end, open wires
on the other side
CPM12 AA8.2: 8-pole cable. Length 2m. 8-pole M12 connector on one end, open wires on
the other side.
CPM12 AA8.5: 8-pole cable. Length 5m. 8-pole M12 connector on one end, open wires on
the other side.
CPM12 AA8.10: 8-pole cable. Length 10m. 8-pole M12 connector on one end, open wires
on the other side
HD978TR3: Configurable signal converter amplifier with 4÷20mA (20÷4mA) output. Input
range -10 ..+60mVdc. Standard configuration 0÷20mVdc. Minimum measuring range
2mVdc. 2- DIN modules for 35mm rail. Configurable with HD778 TCAL
HD978TR5: Configurable signal converter amplifier with 4÷20mA (20÷4mA) output. Input
range -10 ..+60mVdc. Standard configuration 0÷20mVdc. Minimum measuring range
2mVdc. Configurable with HD778 TCAL. Container for Wall Mount installation.
HD978TR4: Configurable signal converter amplifier with 0÷10Vdc (10÷0Vdc) output. Input
range -10 ..+60mVdc. Standard configuration 0÷20mVdc. Minimum measuring range
2mVdc. 2- DIN modules for 35mm rail.. Configurable with HD778 TCAL
HD978TR6: Configurable signal converter amplifier with 0÷10Vdc (10÷0Vdc) output. Input
range -10 ..+60mVdc. Standard configuration 0÷20mVdc. Minimum measuring range
2mVdc. Configurable with HD778 TCAL. Container for Wall Mount installation.
HD 778 TCAL: Voltage generator in the range -60mVdc…+60mVdc, controlled by
PC through the RS232C serial port, DELTALOG-7 software for setting K, J, T, N
thermocouple transmitters and HD978TR3, HD978TR4, HD978TR5, HD978TR6
converters.
LP PHOT 03S
Transmitter with RS485 MODBUS-RTU output for LP PHOT 03 probe
The LP PHOT 03S transmitter converts the mV analog signal generated by the LP PHOT 03
illuminance probe in a digital signal suitable to be transmitted over a RS485 serial line with
MODBUS‑ RTU protocol. The connections are made via the screw terminals accessible by
unscrewing the top cover of the transmitter. The casing is designed for wall mounting.

Technical characteristics
Measuring range with LP PHOT 03 probe Low range: 0…10,000 lux (default)
High range: 0…200,000 lux
Resolution 1 lux (low range) / 10 lux (high range)
Output RS485 (1 Unit Load) with MODBUS‑ RTU protocol,
not isolated
Power supply 5…30 Vdc
Casing dimensions 80 x 84 x 44 mm
Protection degree IP 66
Operating temperature/humidity -30…+70 °C / 0…90% R.H. not condensing
Storage temperature -40…+80 °C
Setting the RS485 communication parameters of the transmitter
Before connecting the transmitter to the RS485 network, an address must be assigned and the
communication parameters be set, if different from the factory preset.
The parameters setting is performed by connecting the transmitter to the PC by using the
optional RS48 cable, with built‑ in RS485/USB converter. To use the cable, it is necessary to
install the related USB drivers in the PC. Alternatively, a generic RS485/RS232 or RS485/USB
converter can be used instead of the RS48 cable.

PWRUSB
drivers installation notes:
With Windows 7 and 8 operating systems, before installing the drivers it is necessary
to restart the PC disabling the drivers signature request. When Windows restarts, press
F8 to display the “Advanced Boot Options” menu, then select the “Disable Driver Signature
Enforcement” option.
With 64-bit operating systems, even after installation it is necessary to disable the
drivers signature request every time the PC is restarted.
Procedure for setting the parameters
1. Start with the transmitter not powered.
2. Start a standard serial communication program, such as Hyperterminal. Set the COM port
number to which the transmitter will be connected, set the Baud Rate to 57600 and the
communication parameters as follows:
Data Bits: 8 Parity: None Stop Bits: 2
3. Switch the transmitter on and wait to receive the & character, then send (within 10 s from
power on) the @ command and press Enter.
Note: if the transmitter does not receive the @ command within 10 seconds from power on,
the RS485 MODBUS mode is automatically activated. In such a case, it is necessary to switch
off and on again the transmitter.
4. Send the command CAL USER ON.
Note: the command CAL USER ON is disabled after 5 minutes of inactivity.
5. Send the serial commands in the following table to set the RS485 MODBUS parameters:

6. You can check the parameters setting by sending the following serial commands:

For best accuracy, it is advisable not to extend the length of the shielded cable supplied with
the LP PHOT 03S probe. It is also recommended not to pass wiring near power cables (electric
motors, induction furnaces, inverters, etc.).
In the RS485 connection, the instruments are connected through a twisted-pair shielded cable
for signals and a third wire for ground. Line terminations should be placed at the two ends of
the network. To polarize the line during non-transmission periods, resistors connected between
signal lines and power supply are used.
The maximum number of devices that can be connected to the RS485 line (Bus) depends on
the load characteristics of the devices to be connected. The RS485 standard requires that the
total load does not exceed 32 unit loads. The load of an LP PHOT 03S transmitter is equal to
1 unit load. If the total load is greater than 32 unit loads, divide the network into segments and
add a signal repeater between a segment and the successive one. Line termination should be
applied at both ends of each segment.
Operating mode
The transmitter enters RS485 MODBUS‑ RTU mode after 10 seconds from power on. In the
first 10 seconds from power on the transmitter does not reply to requests from the MODBUS
master unit. After 10 seconds, it is possible to send MODBUS requests to the transmitter.
Reading of the measures with the MODBUS-RTU protocol
In MODBUS mode, you can read the values measured by the instrument through the function
code 04h (Read Input Registers). The following table lists the information available with the
appropriate register address:

Setting the probe sensitivity and the measuring range
The measuring range preset in the transmitter is 0…10,000 lux (low range), normally suitable
for indoor measurements. If higher values should be measured, for example in the case
of outdoor measurements, the measuring range 0…200,000 lux (high range) can be set.
Different resolutions correspond to the two measuring ranges: 1 lux for the low range, 10 lux
for the high range.
The setting of the probe sensitivity is required when replacing the probe connected to the
transmitter with a new probe having different sensitivity.
To set the probe sensitivity and the measuring range, proceed as follows:
1. Start with the transmitter not powered.
2. Connect the transmitter to the PC by using the optional RS48 cable.
3. Start a standard serial communication program, such as Hyperterminal. Set the COM port
number to which the transmitter will be connected, set the Baud Rate to 57600 and the
communication parameters as follows:
Data Bits: 8
Parity: None
Stop Bits: 2
4. Switch the transmitter on and wait to receive the & character, then send (within 10 s from
power on) the @ command and press Enter.
Note: if the transmitter does not receive the @ command within 10 seconds from power
on, the RS485 MODBUS mode is automatically activated. In such a case, it is necessary to
switch off and on again the transmitter.
5. Send the command CAL START.
Note: the command CAL START is disabled after 5 minutes of inactivity.
6. Send the following serial commands:
Command Response Description
CLSnnn &| Set the probe sensitivity to the value nnn in μV/klux
nnn indicates a 3 or 4-digit integer number between 500 and 2500
O2E &| Set low range (0…10,000 lux, 1 lux resolution)
O2D &| Set high range (0…200,000 lux, 10 lux resolution)
7. You can check the probe sensitivity and the measuring range setting by sending the following
serial commands:
Command Response Description
RLS & nnn| Read the set sensitivity in μV/klux
RO hh|
Read the configuration byte
bit 2 = 0 ⇒ high range (0…200,000 lux, 10 lux resolution)
bit 2 = 1 ⇒ low range (0…10,000 lux, 1 lux resolution)
The bit 2 is the third bit from the right of the configuration byte
Note: it is not required to send the CAL START command to read the settings with the RLS and
RO commands.
When the settings are completed, switch the transmitter off and then back on to activate the
RS485 MODBUS‑ RTU operating mode.

Ordering codes
LP PHOT 03S: Transmitter with RS485 MODBUS‑ RTU output for the LP PHOT 03 illuminance
probe. Measuring range: 0…10,000 lux with 1 lux resolution or 0…200,000 lux with 10 lux
resolution. Connections via screw terminals. Wall mount casing. Power supply 5…30 Vdc.
Supplied with LP PHOT 03 illuminance probe.
RS48: PC connection cable for the configuration of the MODBUS parameters. With built‑ in
RS485/USB converter. Open wires on the instrument side and USB A‑ type connector on the
PC side.

Download

Manuals and Brochures here.  

LPPHOT03_LPPAR03.pdf

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