Pag. 11 of 52
- Introduction
6. INTRODUCTION
The
instruement
flow measurement system is composed of a digital converter and two ultrasonic transducers.
The instrument uses the fluid transit time, measured inside a pipe of cylindrical section, to calculate the instantaneous
flow rate value. The DSP technology, Digital Signal Processing, ensures system low sensitivity to any potential
interference factors .
6.1 Turn on the digital converter
The
DIMPU
system standard power supply is 230Vac or 10÷30Vdc.
Before connection check the supply voltage.
When switched on, a program for self-diagnostic controls the hardware and the software. In case of malfunction, an error
message is displayed. After checking, the system will display the last selected menu before turning off, for example,
if the menu “02” was the last selected menu (from now on indicated with
M02
), the instantaneous flow rate and direct
totalizer will be directly displayed.
During the sliding and/or displaying of the various windows menu, the measurement is not interrupted. Only when the
user sets the new pipe parameters (and each time the instrument is turned on), the
DIMPU
initiates a check-up
for the signal reception automatic optimization, that status will be displayed at the top right of the display,
*
R
means
normal status
.
In case of re-positioning of the transducers, the instrument will automatically adjust the signal reception.
All configurations set by the user are stored in memory, but it’s good to make sure that the menu
M26
, “
Default Settings
”
is set to “
0. Use RAM Settings
”
6.2 keyboard
DIMPU
has 4 buttons:
Press
to activate the programming or displaying menu direct selection
Press
:
- select to the previous menu (during normal menu displaying)
- edit the selected digit (during menu programming or selecting)
- select the previous option (during menu programming)
Press
:
- select the next menu (during normal menu displaying)
- select the digit to the right (during menu programming or selecting)
- select the next option (during menu programming)
Press
:
- access to the programming menu (during the programming menu displaying)
- confirms the entered or selected data (during the programming menu)
6.3 Menus
The menus are numbered from M00 to M99 and from M+0 to M+9.
There are two ways to select a menu:
1) Direct access, press
followed by the number of the desired menu. For example, to select
M11
(the pipe outer
diameter) press in the order:
(enables the menu direct selection),
(edit the selected digit),
(select the
digit to the right),
(edit the selected digit),
(confirms the entered data)
2) Search using
or
. Each time
is pressed, will access to the previous menu (for example, to switch from
M12 to M11), and each time
is pressed, will access to the next menu (for example, to switch from
M11 to M12)
There are three menus types:
1) programming menu with alphanumeric or numeric settings (eg. pipe outer diameter,
M11
)
2) programming menu with option selection (eg. pipe material,
M14
)
3) displaying menu (eg. instantaneous flow rate and forward flow totalizer,
M02
)
