5
1. Introduction
During chemical-physical treatments of waters aimed to coagulate and precipitate pollutants, chemical coagulants are
evaluated and their dosing optimized by jar tests. In relation to the variable composition of wastewaters the chemical dosing
and the test frequency are to be adapted to local conditions. The jar test equipment manufactured by VELP is characterized
by an electronic speed control with an independent speed settable for each place in order to optimize the result of settling so
to reduce chemical consumption. FC4S and FC6S allow to pre-select 10 different speeds for each stirring point using the
relative selectors located on the front panel (10-15-30-45-60-90-120-150-200-300). The steel structure epoxy painted is
studied and tested in order to give the instrument an excellent resistance against the attack of chemical agents and
corrosion in general. The stainless steel stirring rods are adjustable in height by a self-blocking chuck. The examined
samples can be lighted by a back led lamp controlled by a switch located on front panel.
2. Assembly and installation
Upon receipt and after having removed the packaging, please check the integrity of the instrument. The box includes:
Flocculator
Plug for power supply
Switching VELP 100-240V/12V without plug
Instruction manual
2.1 Electrical connection
Before connecting the instrument to the power supply, make sure that the values on the rating plate correspond to those of
the power supply. Connect the unit to the power supply using the switching.
Ensure that the socket and the relative cut-off device conform to current safety norms and easy to reach.
2.2 Start-up
Rotate the speed knob completely to the left. Place the beakers containing the sample and then, set the speed.
3. Operating controls
It’s possible to select the desired stirrer speed by the knob “Stirrer rpm” on the frontal panel. It’s possible to choose the
desired values: 10-15-30-60-90-120-150-200-300 rpm by using the information written on the analogical scale around the
knob.
At the end of the work cycle set the
stirring speed knob on “0” rpm and turn off the light switch. If the instrument is not used
for a long period it’s better to disconnect the external power supply from the plug.
4. Maintenance
No routine or extraordinary maintenance is necessary apart from periodically cleaning of the unit as described in this
manual. In compliance with the product guarantee law, repairs to our units must be carried out in our factory, unless
previously agreed otherwise with local distributors. The instrument must be transported in its original packaging and any
indications present on the original packaging must be followed (e.g. palletized).
4.1 Cleaning
Disconnect the unit from the power supply and use a cloth dampened with an non-inflammable non-aggressive detergent.
5. Technical data
Power supply
100-240 V / 50-60 Hz
Power
18 W (FC4S)
23 W (FC6S)
Dimensions (WxHxD)
655x404x296 mm (FC4S)
935x404x296 mm (FC6S)
Weight (with plug)
12.5 Kg (FC4S)
18 Kg (FC6S)
Speed range
10-15-30-45-60-90-120-150-200-300 rpm
Construction material
Epoxy painted metal structure
Environmental ambient temperature
5 - 40 °C (41 - 104°F)
Storage temperature range
-
10… + 60 °C (14 - 140°F)
Max humidity
80%
Pollution degree
2
6. Accessories / Spare parts
A00001000
Plastic beaker 1000 ml
A00001001
Glass beaker 1000 ml
A00001002
Transparent plastic imhoff cone
A00001003
Glass graduated imhoff cone
A00001004
Stand for two imhoff cones
40000248
Knob 30D blue
10000235
Bumpon 20x20x13,2H
EN