The circuit is based on a microprocessor that, in function of the pulses per litre programmed,
totalizes the volume that flows through the meter and shows this value on a local indicator.
This instrument is battery powered and doesn’t require any wiring. This makes its installation
very easy.
2. OPERATION
To adapt the counter to the meter, the pulses per litre factor specified on the meter must be
programmed. To do this, the plastic front cover must be removed by unscrewing the four
screws on the corners. After that, the push buttons will be accessible.
There are three push buttons with the following functions:
2.1. PROGRAMMING
By pushing the two push buttons PROG at the same time for at least two seconds, the
display will change to the programming mode. In this mode there are 7 digits (five whole
numbers and two decimals). The value that must be introduced is the pulses per litre factor given on the label of the Covol or Turbine. If you wish to totalise in m
per litre must be multiplied by 1000. For example, if the turbine has a pulse per litre value
of 21,02 then 21020,00 should be entered in the configuration.
is designed to work with Tecfluid’s volumetric counters (Covol) and
CIP
3
then the pulses
2
To do this, pushing the push button marked with the arrow pointing upwards, the underlined digit will increase. Once the desired value of the digit is achieved, by pressing the
push button marked with the arrow pointing left, the cursor will pass to the next digit to be
modified. On the sixth digit, by pressing this push-button the cursor will pass to the first
digit on the display.
When the value of the pulses per litre is correct, by pushing the two push buttons PROG
at the same time for at least two seconds, this value will be automatically saved in the
memory and the counter will return to the normal working mode.
: During the process of programming the pulses per litre, the counter increases its
NOTE
power consumption. In order to optimise the battery life time, if during 30 seconds no push
buttons are pushed, the counter return to the normal working mode. In this case the data
in the memory will not be changed.
2.2. RESET
By pushing the RESET push button during two seconds the counter will be set to zero.
It is possible to reset the counter without removing the plastic front cover by holding a
magnet horizontally below the RESET push button during two seconds.
Page 3
3. MAINTENANCE
The battery has a life time of about 5 years. To
change the battery, the plastic front cover must be
removed. Then the battery, that is situated below
the push buttons, can be replaced.
After replacing the battery, it is not necessary to
reprogram the pulses per litre factor of the meter.
CR2450 batteries are easily found in the shops. If
you prefer, we can change it in our factory.
4. MEASUREMENT ERROR CORRECTIONS
o
The calibration of the mechanical flowmeters is made with water at 20
tion for a liquid of density 1 kg/l and viscosity of 1 mPa·s. If the flowmeter is used with a liquid
of other characteristics from the above specified or for reasons of turbulences in the flow,
measurement errors can be induced.
To correct these types of errors we can modify the pulses per litre factor programmed in the
instrument.
5. CHANGE OF UNITS OF MEASUREMENT
In some cases we need to change the measurement units, for example, instead of working in
litres we need to work in kilograms. In this case we will need to know the density of the liquid
(ρ).
To change from litres to kg we must divide the pulse per litre factor by the density of the liquid
CIP
to obtain the new factor for programming the
0.9 kg/litre, the meter gives us 200 pulses per litre and we must count in kg, we will program
the
Fk = Pulses per litre factor to count in kilos
F = Original pulses per litre factor
ρ = Density of the liquid in kg/litre
6. TECHNICAL CHARACTERISTICS
using 222.222 as the new pulses per litre factor to be able to count directly in kg.
CIP
. For example, if the liquid has a density of
F
k
C to obtain a calibra-
F
=
ρ
6.1. Power supply
CR-2450 lithium battery
Nominal voltage: 3V
Capacity: 560 mAh
Power consumption: 8 µA
6.2. Totalizer
o
. of digits: 7
N
Size of digits: 8 mm
Reset: By means of push button or magnet.
3
Page 4
6.3. General Characteristics
Protection level: IP65
Working temperature: 0 — +50 ºC
6.4 Terminals
Terminal N
o
. Covol Turbine
1 Common Common
2 Live Live
3 — Live
Complies with the Directive EMC 89/336/CEE
Norm EN 50081-1
Norm EN 50082-2
WARRANTY
Tecfluid S.A. GUARANTEES ALL ITS PRODUCTS FOR A PERIOD OF 12 MONTHS, maximum 18
months after consignment, against all defects in materials and workmanship.
This warranty does not cover failures which can be imputed to misuse, use in an application different
to that specified in the order, the result of service or modification by un-authorized persons, bad handling or accident.
This warranty is limited to cover the repair or replacement defective parts which have not been damaged by misuse.
This warranty is limited to the repair of the equipment and all further and eventually following damages are not covered by this warranty.
In the event of consignment of equipment to our factory, this should be done with the equipment well
packed and prepaid transport. Tecfluid S.A. will not accept any responsibility for damage done during
transport. Together with the equipment, a note should be enclosed indicating the failure observed,
the name, address and telephone number of the sender.