Delta OHM LPPYRHE16 User manual

Operating manual
Pyranometer
LPPYRHE16
www.deltaohm.com
English
Keep for future reference.

LPPYRHE16 -2-V2.3
TABLE OF CONTENTS
1INTRODUCTION.................................................................................................... 3
2WORKING PRINCIPLE........................................................................................... 4
3INSTALLATION ..................................................................................................... 6
4ELECTRICAL CONNECTIONS.................................................................................. 8
4.1 LPPYRHE16 CONNECTIONS.................................................................................... 8
4.2 LPPYRHE16AC CONNECTIONS................................................................................ 9
4.3 LPPYRHE16AV CONNECTIONS................................................................................ 9
4.4 LPPYRHE16S CONNECTIONS................................................................................ 10
4.5 LPPYRHE16ACS CONNECTIONS............................................................................ 11
5MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT.................................... 12
5.1 LPPYRHE16 ................................................................................................... 12
5.2 LPPYRHE16AC[S]........................................................................................... 12
5.3 LPPYRHE16AV ............................................................................................... 12
6RS485 MODBUS-RTU OUTPUT............................................................................. 13
6.1 SETTING THE COMMUNICATION PARAMETERS............................................................... 13
6.2 READING THE MEASURES WITH THE MODBUS-RTU PROTOCOL .......................................... 15
7TECHNICAL SPECIFICATIONS............................................................................. 16
8MAINTENANCE.................................................................................................... 17
9SAFETY INSTRUCTIONS...................................................................................... 17
10 ACCESSORIES ORDERING CODES ....................................................................... 18

LPPYRHE16 -3-V2.3
1INTRODUCTION
The pyrheliometer LPPYRHE16 measure the direct solar irradiance (W/m2).
The receiving surface must be positioned perpendicularly to sun’s rays, via a solar
tracker or else.
LPPYRHE16 is a B class pyrheliometer in accordance with ISO 9060:2018 standard
and with the criteria of the WMO “Guide to Meteorological Instruments and Methods of
Observation’”, seventh edition (2008).
The pyrheliometer has a field of view of 5°, in accordance with ISO 9060:2018 stand-
ard and WMO guide.
The pyrheliometer is available in the following versions:
•LPPYRHE16: PASSIVE.
•LPPYRHE16AC: ACTIVE with 4..20 mA CURRENT output (0…2000 W/m2).
•LPPYRHE16ACS: ACTIVE with 4..20 mA CURRENT output (0…2000 W/m2) and
RS485 Modbus-RTU output.
•LPPYRHE16AV: ACTIVE with 0..1 or 0..5 or 0..10 V VOLTAGE output (0…2000
W/m2) to be defined when ordering.
•LPPYRHE16S: With RS485 Modbus-RTU output.
The pyrheliometer is supplied factory calibrated and with a calibration report.

LPPYRHE16 -4-V2.3
2WORKING PRINCIPLE
The pyrheliometer LPPYRHE16 is based on a passive thermopile sensor. The sensitive
surface of the thermopile is coated with a matt black paint, which makes the pyrheli-
ometer not selective to the different wave lengths. The spectral range of the pyrheli-
ometer is determined by the transmission of the quartz window, whose function is to
protect the sensor from dust and water. A special quartz allows to perform a non-
selective measurement from 200 nm to 4000 nm.
The adopted sensor allows the response time to be lower than ISO 9060:2018 re-
quirements for the classification of class B pyrheliometers (the response time is un-
der 9 seconds while the standard requires a response time lower than 15 seconds).
Radiant energy is absorbed by the blackened surface of the thermopile, thus creat-
ing a difference in temperature between the hot junction and the body of the pyr-
heliometer, which acts in this case as a cold junction. Thanks to the Seebeck effect,
the difference in temperature between hot and cold junction is converted into a Dif-
ference of Potential.
In order to reduce the variations of sensitivity depending on temperature and to fall
within the specifications requested to a class B pyrheliometer, LPPYRHE16 is pro-
vided with a passive compensation circuit. Figure 2.1 shows the typical variation of
sensitivity at different temperatures. Deviations are calculated starting from sensi-
tivity measured at 20 °C.
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-30 -20 -10 010 20 30 40 50 60
Temperatura (C°)
Variazione % della sensibilità
Fig. 2.1: % variation of sensitivity of the LPPYRHE16 pyrheliometer with regard
to sensitivity at 20 °C in the temperature range from -20 to 50 °C
LPPYRHE16 is a sealed instrument, for that reason a cartridge of silica-gel crystals is
provided to absorb humidity inside the instrument, in order to prevent condensation
from forming on the quartz window of the instrument, invalidating the performed
measurements.
In accordance with WMO regulations, the angular field of view is 5° and the slope an-
gle is 1° (figure 1).
% sensitivity variation
Temperature (°C)

LPPYRHE16 -5-V2.3
Fig. 2.2: field of view and slope angle
A light shield can be insert, in order to reduce light scattering contribution.
Fig. 2.3: scheme of principle LPPYRHE16 (version with mV output)
Front opening
Internal opening
Sensor
Field of view = 2 * arctan (R/d)
Slope angle = arctan [(R-r)/d]
Thermopile
Surge
Protector
Connector pins
Housing
To cable shield
Temperature
compensation

LPPYRHE16 -6-V2.3
3INSTALLATION
Before installing the pyrheliometer, refill the cartridge containing silica-gel crystals.
Silica gel absorbs humidity inside the instrument and prevents, in particular climatic
conditions, condensation on the internal wall of the quartz window 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. Unscrew the silica gel cartridge using a coin.
2. Remove the cartridge perforated cap.
3. Open the sachet containing silica gel (supplied with the pyrheliometer).
4. Fill the cartridge with the silica gel crystals.
5. Close the cartridge with its own cap, paying attention that the sealing O-ring be
properly positioned.
6. Screw the cartridge to the pyrheliometer body using a coin.
7. Check that the cartridge is screwed tightly (if not, silica gel life will be reduced).
8. The pyrheliometer is ready for use.
The figure below shows the operations necessary to fill the cartridge with the silica gel
crystals.
Fig. 3.1: filling the silica-gel cartridge
Silica-gel
cartridge
Perforated cap
Sealed sachet
of silica-gel crystals
Filling
Closing the cartridge

LPPYRHE16 -7-V2.3
•The pyrheliometer must be mounted in an easy-to-reach location in order to clean
the quartz window regularly and carry out maintenance. At the same time, make
sure that no buildings, constructions, trees or obstructions intercept the sun’s path
during the day all year long.
•To point the pyrheliometer, the two holes in the front and back flange are used. To
properly align the instrument, just make sure that the sun’s beams that pass
through the first hole (on the front flange of the pyrheliometer) reach the second
hole (on the back flange).
•
Fig. 3.2: description and dimensions in mm
Alignment holes
Silica-gel
cartridge

LPPYRHE16 -8-V2.3
4ELECTRICAL CONNECTIONS
LPPYRHE16, LPPYRHE16AC and LPPYRHE16AV have a 4-pole connector and use
the CPM12AA4... optional cables.
LPPYRHE16S and LPPYRHE16ACS have a 8-pole connector. LPPYRHE16S uses the
CPM12-8D... optional cables, while LPPYRHE16ACSuses the CPM12-8DA... op-
tional cables.
The metallic housing of the pyrheliometer should preferably be
grounded ( ) locally. In this case, do not connect the wire of the
cable corresponding to the housing to prevent ground loops.
Only if it is not possible to ground locally the metallic case of the
pyrheliometer, connect the wire of the cable corresponding to
the housing to ground ( ).
In the powered versions, internally there are surge protection devices connected to the
housing. Grounding the housing allows the correct protection functionality, in particular
against lightning.
4.1 LPPYRHE16 CONNECTIONS
The pyrheliometer LPPYRHE16 is passive and does not require power supply. It is to
be connected either to a millivoltmeter or to a data acquisition system. Typically, the
pyranometer output signal does not exceed 20 mV. In order to better exploit the pyr-
heliometer features, the readout instrument should have 1 µV resolution.
Connector Function Color
1
Vout (+)
Red
2
Vout (-)
Blue
3
Housing (C)
White
4
Cable shield (SH)
Black
Fig. 4.1: LPPYRHE16 connections
CPM12AA4… cable
Sensor M12
male connector
Datalogger or
converter/amplifier
with Vor mA output
Connect to ground only if it is not possible to
ground locally the housing of the pyr
heliometer

LPPYRHE16 -9-V2.3
4.2 LPPYRHE16AC CONNECTIONS
The pyrheliometer LPPYRHE16AC has 4…20 mA output and requires 10…30 Vdc ex-
ternal power supply. It is to be connected to a power supply and an instrument with
4…20 mA input as shown in fig. 4.2. The load resistance of the instrument reading the
signal must be ≤500 Ω.
Connector Function Color
1
Positive (Iin)
Red
2
Negative (Iout)
Blue
3
Housing (C)
White
4
Cable shield (SH)
Black
Fig. 4.2: LPPYRHE16AC connections
4.3 LPPYRHE16AV CONNECTIONS
The pyrheliometer LPPYRHE16AV has 0…1 V, 0…5 V or 0…10 V output (depending
on the ordered output) and requires external power supply: 10…30 Vdc for 0…1 V
and 0…5 V outputs, 15…30 Vdc for 0…10 V output. It is to be connected to a power
supply and an instrument with voltage input as shown in fig. 4.3. The load resistance
of the instrument reading the signal must be ≥100 kΩ.
Connector Function Color
1
Output positive (+Vout)
Red
2
Output negative
Power supply negative (GND)
Blue
3
Power supply positive (+Vdc)
White
4
Cable shield (SH)
Black
Fig. 4.3: LPPYRHE16AV connections
CPM12AA4… cable
Sensor M12
male connector
Power supply
Connect to ground only if it is not possible to
ground locally the housing of the pyr
heliometer
Instrument with
4…20 mA input
CPM12AA4… cable
Sensor M12
male connector
Power supply
Instrument
with
voltage input

LPPYRHE16 -10 -V2.3
4.4 LPPYRHE16SCONNECTIONS
The pyrheliometer LPPYRHE16S has RS485 Modbus-RTU output and requires
5…30 Vdc external power supply. It is to be connected to a power supply and to a
PLC, a data logger or a RS485/USB or RS485/RS232 converter for PC as shown in fig.
4.4. The RS485 output is not isolated.
Connector Function Color
1
Power supply negative (GND)
Blue
2
Power supply positive (+Vdc)
Red
3
Not connected
4
RS485 A/-
Brown
5
RS485 B/+
White
6
Housing / Cable shield (SH)
Black
7
Not connected
8
Not connected
Fig. 4.4: LPPYRHE16S connections
Before connecting the pyrheliometer to the RS485 network, set the address and the
communication parameters, if different from the factory preset (see chapter 6).
Power supply
CPM12-8D… cable
Sensor M12
male connector
PLC, data logger or
RS485/USB or
RS485/RS232
converter for PC
Other sensors with
RS485 output
Connect to ground only if it is not possible to
ground locally the housing of the pyr
heliometer

LPPYRHE16 -11 -V2.3
4.5 LPPYRHE16ACS CONNECTIONS
The pyrheliometer LPPYRHE16ACS has two outputs:
•One 4…20 mA output, requiring 10…30 Vdc external power supply. It is to be
connected to a power supply and an instrument with 4…20 mA input as shown in
fig. 4.6. The load resistance of the instrument reading the signal must be ≤500 Ω.
•One RS485 Modbus-RTU output, requiring 5…30 Vdc external power supply.
It is to be connected to a power supply and to a PLC, a data logger or a
RS485/USB or RS485/RS232 converter for PC as shown in fig. 4.5. The RS485
output is not isolated.
Connector Function Color
1
Power supply negative (GND)
Blue
2
Power supply positive (+Vdc)
Red
3
Digital and analog ground
(SGND)
Black
4
RS485 A/-
Brown
5
RS485 B/+
White
6
Housing / Cable shield (SH)
Black (thick wire)
7
Analog output positive (AOUT)
Green
8
Not connected
Fig. 4.6: LPPYRHE16ACS connections
Before connecting the pyrheliometer to the RS485 network, set the address and the
communication parameters, if different from the factory preset (see chapter 6).
Power supply
CPM12-8DA… cable
Sensor M12
male connector
PLC, data logger or
RS485/USB or
RS485/RS232
converter for PC
Other sensors with
RS485 output
Connect to ground only if it is not possible to
ground locally the housing of the pyr
heliometer

LPPYRHE16 -12 -V2.3
5MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT
Below are the ways to calculate the direct irradiance in the models with analog output
LPPYRHE16, LPPYRHE16AC[S] and LPPYRHE16AV.
5.1 LPPYRHE16
Each pyrheliometer is distinguished by its own sensitivity (or calibration factor) S ex-
pressed in µV/(Wm-2) and shown in the label on the pyrheliometer (and in the calibra-
tion report).
The irradiance Eeis obtained by measuring with a multimeter the difference of potential
DDP at the ends of the sensor and applying the following formula:
Ee= DDP / S
where:
Eeis the irradiance expressed in W/m2;
DDP is the difference of potential expressed in µV measured by the multimeter;
Sis the sensitivity of the pyrheliometer expressed in µV/(Wm-2).
5.2 LPPYRHE16AC[S]
The 4…20 mA output signal corresponds to the 0…2000 W/m2irradiance range.
The irradiance Eeis obtained by measuring with a multimeter the current Iout absorbed
by the sensor and applying the following formula:
Ee= 125 •(Iout - 4)
where:
Eeis the irradiance expressed in W/m2;
Iout is the current expressed in mA absorbed by the pyrheliometer.
5.3 LPPYRHE16AV
The output signal (0…1 V, 0…5 V or 0…10 V depending on the version) corresponds to
the 0…2000 W/m2irradiance range.
The irradiance Eeis obtained by measuring with a multimeter the output voltage Vout of
the sensor and applying the following formula:
Ee= 2000 •Vout for the version 0…1 V
Ee= 400 •Vout for the version 0…5 V
Ee= 200 •Vout for the version 0…10 V
where:
Eeis the irradiance expressed in W/m2;
Vout is the output voltage expressed in V measured by the multimeter.

LPPYRHE16 -13 -V2.3
6RS485 MODBUS-RTU OUTPUT
Before connecting the pyrheliometer to the RS485 network, an address must be assigned
and the communication parameters must be set, if different from the factory preset.
6.1 SETTING THE COMMUNICATION PARAMETERS
Connect the pyrheliometer to the PC in one of the following two ways:
A. By using the optional CP24 cable, with built-in RS485/USB converter. In this con-
nection mode, the sensor is powered by the PC USB port. To use the cable, it is
necessary to install the related USB drivers in the PC.
B. By using the supplied 8-pole M12 female connector or the optional CPM12-8D…
cable and a generic RS485/USB or RS485/RS232 converter. In this connection
mode, it is necessary to power the pyrheliometer separately. If a RS485/USB con-
verter is used, it is necessary to install the related USB drivers in the PC.
NOTES ON THE INSTALLATION OF UNSIGNED USB DRIVER: before installing unsigned USB driver into
operating systems starting from Windows 7, it is necessary to restart the PC by disabling the
driver signing request. If the operating system is 64-bit, even after installation the request of
driver signing have to be disabled each time the PC is restarted.
Procedure:
1. Start with the pyrheliometer not powered (if the CP24 cable is used, disconnect
one end of the cable).
2. In the PC, start a serial communication program. Set the Baud Rate to 57600 and
set the communication parameters as follows (the pyrheliometer is connected to a
COM type port):
Data Bits: 8
Parity: None
Stop Bits: 2
In the program, set the COM port number to which the pyrheliometer will be con-
nected.
3. Switch the pyrheliometer on (if the CP24 cable is used, connect both ends of the
cable).
Power supply
or
CPM12-8D… cable
Red
Blue
Brown
White
Pyrheliometer
connector
CP24 cable
Pyrheliometer
connector

LPPYRHE16 -14 -V2.3
4. Within 10 seconds from the pyrheliometer power on, send the @command and
press Enter.
Note: if the pyrheliometer 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 pyrheliometer.
5. Send the command CAL USER ON.
Note: the command CAL USER ON is disabled after 5 minutes of inactivity.
6. Send the serial commands given in the following table to set the RS485 MODBUS
parameters:
Command
Response
Description
CMAnnn
&|
Set RS485 address to nnn
Ranging from 1 to 247
Preset on 1
CMBn
&|
Set RS485 Baud Rate
n=0 ⇒9600 n=1 ⇒19200 n=2 ⇒38400
n=3 ⇒57600 n=4 ⇒115200
Preset on 1 ⇒19200
CMPn
&|
Set RS485 transmission mode
n=0 ⇒8-N-1 (8 data bits, no parity, 1 stop bit)
n=1 ⇒8-N-2 (8 data bits, no parity, 2 stop bits)
n=2 ⇒8-E-1 (8 data bits, even parity, 1 stop bit)
n=3 ⇒8-E-2 (8 data bits, even parity, 2 stop bits)
n=4 ⇒8-O-1 (8 data bits, odd parity, 1 stop bit)
n=5 ⇒8-O-2 (8 data bits, odd parity, 2 stop bits)
Preset on 2 ⇒8-E-1
CMWn
&|
Set receiving mode after RS485 transmission
n=0 ⇒Violate protocol and go in Rx mode right after Tx
n=1 ⇒Respect protocol and wait 3.5 characters after Tx
Preset on 1
⇒
Respect the protocol
7. You can check the parameters setting by sending the following serial commands:
Command
Response
Description
RMA
Address
Read RS485 address
RMB
Baud Rate
(0,1)
Read RS485 Baud Rate
0 ⇒9600 1 ⇒19200 2 ⇒38400
3 ⇒57600 4 ⇒115200
RMP
Tx Mode
(0,1,2,3,4,5)
Read RS485 transmission mode
0 ⇒8-N-1
1 ⇒8-N-2
2 ⇒8-E-1
3 ⇒8-E-2
4 ⇒8-O-1
5 ⇒8-O-2
RMW
Rx Mode
(0,1)
Read receiving mode after RS485 transmission
0 ⇒Violate protocol and go in Rx mode right after Tx
1 ⇒Respect protocol and wait 3.5 characters after Tx
Note: it is not required to send the CAL USER ON command to read the settings.

LPPYRHE16 -15 -V2.3
6.2 READING THE MEASURES WITH THE MODBUS-RTU PROTOCOL
In MODBUS mode, you can read the values measured by the pyrheliometer through
the function code 04h (Read Input Registers). The following table lists the quantities
available with the appropriate register number and address:
Number
Address
Quantity
Format
1 0 Internal temperature in °C (x10) 16-bit Integer
2 1 Internal temperature in °F (x10) 16-bit Integer
3 2 Solar radiation in W/m216-bit Integer
4 3 Status register:
bit0=1 ⇒solar radiation measurement error
bit2=1 ⇒configuration data error
bit3=1 ⇒program memory error
16-bit Integer
5 4 Average values of the last 4 measurements 16-bit Integer
6 5 Signal generated by the sensor in µV/10
[e.g.: 816 means 8160 µV, the resolution is 10 µV]16-bit Integer
Note: Register address = Register number - 1, as defined in the Modbus standard.
OPERATING MODE: the pyrheliometer enters RS485 MODBUS-RTU mode after 10 sec-
onds from power on. In the first 10 seconds from power on the pyrheliometer does
not reply to requests from the MODBUS master unit. After 10 seconds, it is possible to
send MODBUS requests to the pyrheliometer.

LPPYRHE16 -16 -V2.3
7TECHNICAL SPECIFICATIONS
Sensor Thermopile
Typical sensitivity 5 µV/Wm-2
Impedance 5÷50 Ω
Measuring range 0÷2000 W/m2
Viewing angle 5° (slope 1°)
Spectral range (50%) 200÷4000 nm
Operating temperature/humidity -40÷80 °C / 0÷100%
Output Analog in µV/Wm-2(LP PYRHE16)
Analog 4÷20 mA (LPPYRHE16AC[S])
Analog 0÷1 V, 0÷5 V or 0÷10 V (LPPYRHE16AV)
Digital RS485 Modbus-RTU (LPPYRHE16[AC]S)
Power supply 10÷30 Vdc (4÷20 mA, 0÷1 V and 0÷5 V outputs)
15÷30 Vdc (0÷10 V output)
5÷30 Vdc (RS485 Modbus-RTU output)
Connection 4 or 8-pole M12 connector depending on the model
Dimensions Fig. 3.2
Weight 1.5 kg
Technical Specifications According to ISO 9060:2018
Response time (95%) < 9 s
Zero offset in response to a 5 K/h
change in ambiente temperature <±3W/m2
Long-term instability (1 year) <±1%
Non-linearity <±0.5%
Spectral error < ±0.8%
Temperature response < ±2%
Tilt response <±0.5%

LPPYRHE16 -17 -V2.3
8MAINTENANCE
In order to grant measurements high accuracy, it is important to keep the quartz win-
dow clean. Consequently, the more the window will be kept clean, the more meas-
urements will be accurate.
You can wash it using water and standard papers for lens. If necessary, use pure
ETHYL alcohol. After using alcohol, clean again the window with water only.
Because of the high temperature changes between day and night, some condensation
might appear on the pyrheliometer window. In this case the performed reading is
highly over-estimated. To minimize the condensation, the pyrheliometer is provided
with a cartridge containing dessicant material (silica-gel). The efficiency of the silica-
gel crystals decreases over time while absorbing humidity. Silica-gel crystals are effi-
cient when their color is yellow, while they turn white/translucent as soon as they
loose their efficiency. Read instructions at chapter 3 about how to replace the silica-
gel crystals. Silica-gel typical lifetime goes from 2 to 6 months depending on the envi-
ronment where the pyrheliometer works.
To exploit all the pyrheliometer features, it is highly recommended that the calibration
be checked annually.
9SAFETY INSTRUCTIONS
General safety instructions
The instrument has been manufactured and tested in accordance with the safety
standard EN61010-1:2010 “Safety requirements for electrical equipment for meas-
urement, control and laboratory use” and has left the factory in perfect safety tech-
nical conditions.
The instrument proper operation and operating safety can be ensured only if all
standard safety measures as well as the specific measures described in this manual
are followed.
The instrument proper operation and operating safety can be ensured only in the cli-
matic conditions specified in this manual.
Do not use the instruments in places where there are:
•Corrosive or flammable gases.
•Direct vibrations or shocks to the instrument.
•High-intensity electromagnetic fields, static electricity.
User obligations
The instrument operator shall follow the directives and regulations below that refer to
the treatment of dangerous materials:
•EEC directives on workplace safety.
•National law regulations on workplace safety.
•Accident prevention regulations.

LPPYRHE16 -18 -V2.3
10 ACCESSORIES ORDERING CODES
CPM12AA4…Cable with 4-pole M12 connector on one end, open wires on the
other end. Length 2 m (CPM12AA4.2), 5 m (CPM12AA4.5) or 10 m
(CPM12AA4.10). For LPPYRHE16, LPPYRHE16AC and LPPYRHE16AV.
CPM12-8D… Cable with 8-pole M12 connector on one end, open wires on the
other end. Length 2 m (CPM12-8D.2), 5 m (CPM12-8D.5) or 10 m
(CPM12-8D.10). For LPPYRHE16S.
CPM12-8DA… Cable with 8-pole M12 connector on one end, open wires on the
other end. Length 2 m (CPM12-8DA.2), 5 m (CPM12-8DA.5) or
10 m (CPM12-8DA.10). For LPPYRHE16ACS.
CP24 PC connecting cable for the RS485 MODBUS parameters configu-
ration of the LPPYRHE16[AC]S pyrheliometers. With built-in
RS485/USB converter. 8-pole M12 connector on instrument side
and A-type USB connector on PC side.
LPSG Cartridge to contain desiccant silica-gel crystals, complete with O-
ring and cap. Spare part.
LPG Pack of 5 sachets of silica-gel crystals.
DELTA OHM metrology laboratories LAT N° 124 are ISO/IEC 17025 accredited by
ACCREDIA for Temperature, Humidity, Pressure, Photometry / Radiometry, Acous-
tics and Air Velocity. They can supply calibration certificates for the accredited
quantities.

GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico
Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY
Phone [phone] | Fax [phone]
www.deltaohm.com | [e-mail]
WARRANTY
Delta OHM is required to respond to the "factory warranty" only in those cases provided by
Legislative Decree 6 September 2005 - n. 206. Each instrument is sold after rigorous inspections;
if any manufacturing defect is found, it is necessary to contact the distributor where the
instrument was purchased from. During the warranty period (24 months from the date of invoice)
any manufacturing defects found will be repaired free of charge. Misuse, wear, neglect, lack or
inefficient maintenance as well as theft and damage during transport are excluded. Warranty does
not apply if changes, tampering or unauthorized repairs are made on the product. Solutions,
probes, electrodes and microphones are not guaranteed as the improper use, even for a few
minutes, may cause irreparable damages.
Delta OHM repairs the products that show defects of construction in accordance with the terms
and conditions of warranty included in the manual of the product. For any dispute, the competent
court is the Court of Padua. The Italian law and the “Convention on Contracts for the International
Sales of Goods” apply.
TECHNICAL INFORMATION
The quality level of our instruments is the result of the continuous product development. This may
lead to differences between the information reported in the manual and the instrument you have
purchased. In case of discrepancies and/or inconsistencies, please write to [e-mail].
Delta OHM reserves the right to change technical specifications and dimensions to fit the
product requirements without prior notice.
DISPOSAL INFORMATION
Electrical and electronic equipment marked with specific symbol
in compliance
with 2012/19/EU Directive must be disposed of separately from household waste.
European users can hand them over to the dealer or to the manufacturer when
purchasing a new electrical and electronic equipment, or to a WEEE collection
point designated by local authorities. Illegal disposal is punished by law.
Disposing of electrical and electronic equipment separately from normal waste helps to
preserve natural resources and allows materials to be recycled in an environmentally friendly
way without risks to human health.
V2.3
05/2022