Type / N°
Rev.
Fw
Date
Page
Total pages
EW055.600D
D
4L
6
th
June 2018
26
43
EsiWelma
®
s.r.l.
4.2.1 Simple parameters
Choose the parameter to be modified
(push the green button «U» to
change the parameter).
Push the black «t» button to increase
the current parameter value.
Push the red «S» button to annul or
to decrease the current parameter
value.
Push the green «U» button to switch
Figure 15:
Visualization of some set-up parameters.
to the next parameter.
For the measuring devices provided for a zero setting procedure, it can be automatically
started by the computing head. This procedure allows the mass flow meter to adapt
measurement to the actual operating conditions.
It means the procedure has to be started only after the mechanical
and electrical installation of the whole dispenser on the refuelling
station. The whole sequence is automatic; when it stops, parameter
is set to zero and the computing head is ready to deliver. In case a
black out occurs during this procedure, parameter is set to zero and
operator has to start the procedure again.
Figure 16:
Zeroing Massmeter
procedure
4.2.2 Parameters for temperature compensation
Temperature compensation is a procedure which allows to increase the quantity delivered to
the maximum considering that the pressure inside the tank doesn’t exceed a ”compensated”
pressure (when tank itself is at a “compensated” temperature).
For this reason, the following parameters are necessary to define the working point of the:
tC
and
PCON
allow to define pressure and temperature compensation.
t
and
dr
allow to fit the reading mode to the mechanical specifications of the dispenser.
tF
and
tS
set the duration of the puff which is necessary to calculate the quantity to be
delivered in order to reach the requested compensation point.
p.u.
Kg
p.u.
Kg
p.u.
Kg
