Velp Scientifica ECO 8 User manual

10001328/A1 Rev. 1
1
Thermoreactor ECO8
with safety cover
and prefixed temperatures
and times
Operation Manual
IMPORTANT:
READ THE INFORMATION CONTAINED IN THE OPERATION MANUAL BEFORE USING THE
UNIT. THE MANUFACTURER DOES NOT ACCEPT RESPONSIBILITY FOR THE IMPROPER
USE OF THE EQUIPMENT OR FOR FAILURE TO FOLLOW INSTRUCTIONS.
The labels applied to the unit warn of the dangers to which the user may be exposed during use or
maintenance of the unitthermoreactor. The labels must be left on the unit and replaced if they are
no longer readable.
Danger Warning:
To prevent accidents associated with the use of this instrument
Start of Operations:
Read instructions for use and maintenance before using this instrument
SAFETY RULES
1) The heating plate if programmed, may reach a temperature of 150°C, this happens during the
heating phase but also during the cooling phase.
2) The containers and the products used during the work must be compatible with the temperature
set on the unit.
3) The instrument is equipped by a voltage changer accessibile on the rear panel which allows the
connection to electric nets with 230 V or 115 V.
Before connecting the instrument to electric supply verify that the voltage changer is on the position
corresponding to the supplied voltage.
CLEANING
Always unplug the unit before cleaning. The heating plate must be cool.
Use a damp cloth and not flammable, not aggressive detergents.
PERSONAL PROTECTION EQUIPMENT
The equipment used for personal protection must be compatible with the possible dangers deriving
from the working materials and from the glass vessels.
MAINTENANCE
According to the law on products guarantee our instrument must be repaired at our factory, save
different agreements with our agents. For more information see the “Maintenance” Chapter in this
manual.
GUARANTEE
Starts from the date of delivery note and is referred to the number of register of the single unit.
The manufacturer, engaged in a continuous improvement of his products reserves the right to
modify any of their characteristics without notice.

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CONTENTS
1. Introduction 3
2. Instrument description 3
3. Instrument accessories 3
4. Assembly and installation 4
5. Operation 4
5.1 Description of controls 4
5.2 Power interruptions 5
5.3 Safety features 5
6. Start of a cycle 6
7. Maintenance 6
7.1 Replacing fuses 6
8. Disposal 7
9. Accessories 7
9.1 Verifying the temperature of the heating block 7
10. Spare parts 7
11. Technical features 8
12. Electric scheme 9
13. Suggestions 10

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1. Introduction
The thermoeactor ECO 8 has a capacity of 8 round glass test tubes with 16
mm external diameter and for 1 test tube with 22 mm external diameter. It is
devised for sample preparation in determining COD, total phosphorus, total
chromium and other parameters in water and sludge.
This instrument, together with photometers, reagents and accessories for
colorimetric analysis, forms a complete analytical set capable of high
precision and reproducibility, with a limited space requirement.
2. Instrument description
The metal structure covered by an epoxy paint, purposely studied and tested,
makes the instrument highly resistant to the chemical and mechanical
corrosion. The block holding the test tubes is manufactured from an
aluminium alloy which allows a very good thermal homogeneity at all the
selectable temperatures. The temperature of the heating block is controlled by
a microprocessor with a PID logic. The temperature probe is a Pt100 probe
which does not require any calibration because the electronics after each
turning on performs a self calibration. All this allows a very good precision and
reproducibility. The ECO8 thermoreactor is equipped by a voltage changer,
accessibile on the rear of the instrument, allowing a connection to electric nets
230 V or 115 V.
Four different work temperatures can be selected: 70 –100 –120 –150°C,
with four different times of permanence of the temperature of the heating
block at the selected value: 30 –60 –120 minutes or infinite time.
The unit is equipped by safety devices assuring high protection in all the
phases of use: a cover manufactured from Teflon and a transparent cap to be
placed over the test tubes during heating.
The heating block is equipped by a protection against over temperatures
given by a thermostat which turns off the heating when the temperature
exceeds 180°C.
3. Instrument Accessories
The instrument is equipped with the following:
Cable for electrical connection to a European plug
Cable for electrical connection to an American plug

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4. Assembly and installation
The instrument is equipped by a voltage changer accessibile on the rear
panel which allows the connection to electric nets with 230 V or 115 V.
ATTENTION ! Before connecting the instrument to electric supply verify
that the voltage changer is on the position corresponding to the
supplied voltage. The instrument is normally delivered with voltage changer
on 230 V position.
5. Operation
Connect the instrument to the electrical supply only after verifying that the
position of the voltage changer corresponds to the supplied voltage.
5.1 Description of controls
Main switch:
The switch will light when the instrument is turned on
Start/Temp
Button
When the key Start/Temp. is pressed a work cycle is started
with the temperature and time values selected and shown by
the corresponding leds: 150°C and 120 minutes. Following
pressures of the key lower the programmed temperature to
150, 120, 100 or 70°C.
The selected temperature is shown by the lighting of the
corresponding led. It is possible to select different
temperatures if the programmed temperature has not been
reached and the count of time is not started.
After this the key is not operative. If the selected temperature
is higher than the running temperature of the heating block
when the key Start/Temp. is pressed the cycle does not start
and all the leds of temperature light intermittently, showing
the error of setting.
This situation is overcome of a value higher than that of
heating block is selected or if the block is left to cool to a
temperature lower than that to be programmed.
Time Button
Pressing the Time button allows the run time to be changed.
It is possible to select 120, 60, 30 minutes or infinite time.
When a time is selected, the corresponding LED will light.
The run time will start when the heating block reaches the
selected temperature. The LED corresponding to the
selected run time will blink once the run starts and the Time
button will no longer be operative.

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Temperature
LED’s
When the instrument is turned on, the four temperature
LED’s will not be lit. This signals that a work cycle is not in
progress. When a preset temperature is selected the
corresponding LED will light. All of the LED’s will blink when
the selected temperature is higher than the block
temperature.
Time LED’s
When the instrument is turned on, the four time LED’s will not
be lit. When a preset time is selected the corresponding LED
will light. The LED blinks to signal that the preselected
temperature has been reached and the time count has
started.
5.2 Power Interruptions
The instrument will register a black out or a lack of power supply as a manual
stop of the cycle. The work cycle will have to be restarted.
5.3 Safety Features
The instrument is protected against overheating by a thermostat that turns off
the power supply when the temperature exceeds 180°C. The temperature
setting is continuously controlled by electronic equipment that stops
thermoregulation if anomalous measurements are sensed.
In the event of anomalous measurements, all temperature and time LED’s will
start to blink and an acoustical warning signal will sound.

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6. Start of a cycle
A work cycle is started by pressing the Start/Temp. button.
The default option is set at 150°C and 120 minutes as shown by the
corresponding LED’s. It is possible to select other temperatures and times by
pressing the corresponding buttons.
LED’s will light when the corresponding value is selected. It is possible to
change both the time and the temperature until the temperature of the heating
block reaches the selected temperature and the run time starts.
When the selected temperature is reached a beeper will sound intermittently
for 5 seconds. At this time the LED corresponding to the selected time will
start to blink, signaling that the run time has started. The end of the run time
will be signaled by a beeper that will sound continuously for 5 seconds.
At this time the heating element and the LED’s corresponding to time and
temperature will turn off.
The instrument is now ready for a new work cycle. If the selected temperature
of the new work cycle is lower than the running temperature (when the
Start/Temp. button is pressed), the work cycle will not start and all
temperature LED’s will light intermittently, signaling an error. To correct the
error, select a temperature that is higher than the running temperature or wait
until the heating block cools to a temperature that is lower than the
temperature to be programmed.
7. Maintenance
An ordinary or extraordinary maintenance is not necessary. It is only
requested a periodical cleaning as described by this manual.
7.1Replacing fuses
The heating block is equipped with two fuses connected to the socket located
on the rear panel. Before replacing a fuse, disconnect the power cable from
the heating block and use a screwdriver to open the fuse box.

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8. Disposal
Dispose of in a manner consistent with the laws and regulations of the country
and locality in which the unit will be disposed.
9. Accessories
Code Art. ACTE003 Mercury thermometer 0 ÷ 250°C
9.1 Verifying the temperature of the heating block
The temperature is controlled electronically which ensures stability without
temperature oscillations around the set point. The Pt100 probe provides high
precision and does not require calibration because the internal software
performs a self calibration every time the instrument is turned on.
If a control is required it is possible to measure the temperature of the heating
block using an original Velp Scientifica thermometer in the hole located in the
upper part of the block.
10. Spare parts
Fuse 10000667
Electric resistance 10000770
Control electronic card 10000530
Voltage changer electronic card 10000582
Safety thermostat 10001103
Pt100 probe 10000011

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11. Technical features
Description:
code F101A0127
Power supply
V/Hz
220-240/50-60
110-120/50-60
Power
W
135
Weight
kg
2
Dimensions (WxHxD)
mm
135x95x230
Selectable temperatures
°C
150 –120 –100 –70
Selectable times
1’
30 –60 –120 and
infinite
Diameter of holes
mm
16 x n° 8
22 x n° 1
Thermoregulation
P.I.D. microprocessor
Precision
%
± 0.2 end of scale
Temperature probe
Pt 100 class A
Probe calibration
Automatic by software
Heating block:
Temperature stability
°C
± 0.3
Temperature homogeneity
°C
± 0.3
Temperature precision
°C
± 0.3
Overtemperature protection
On the block
Performance:
From 20°C to 150°C
min.
10
Signals:
Reaching of set temperature
Acoustic
During time count
Visual
End of cycle
Acoustic
Error (set temperature > block t°)
Visual and acoustic
Alarm (broken probe)
Visual and acoustic

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12. Electric scheme
1) 5x20mm retarded fuse 3.15A
2) General lighted switch
3) Voltage changer electronic card
4) Safety thermostat
5) Electric resistance
6) Electronic card
7) Pt100 probe

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13. Suggestions
Any suggests and advice would be greatly appreciated to enable us to
constantly improve this instruction manual.
e-mail: [e-mail]