User manual for flow meter with pulse input SPI-94
“Clrtot”
- this option allows zeroing of total flow counter. After selection of this option ask
“CLEAr?”
is displayed. If user press
[ENTER]
total flow counter is cleared, else
action is cancelled
Zeroing of
total flow counter
is possible via RS-485 interface too. It can be done
as write of 0000h to any one of registers referred to
total flow counter
(09h ÷ 0Ch)
using RS 485 interface.
To protect total flow counter of unauthorised zeroing, it is recommended to set
password to menu access (see menu
“SECU”
).
“E Clr”
- this option allows selection of active level/edge of total flow zeroing input (see
Figure 4.10). It can be set to one if following:
“oFF”
- input disabled,
“HI”
- zeroing while high level on the input
“LO”
- zeroing while low level on the input
“LO-HI”
- zeroing while rising edge on the input
“HI-LO”
- zeroing while falling edge on the input
For settings “zeroing while high/low level” the selected level must be longer than 5ms.
7.3.6.
“ Init d
” parameter
This Parameter defines type of the value displayed after power on the meter. It is
possible to set it to:
“Flo”
- current flow rate (instantaneous flow),
“tot”
- lowest part of total flow counter (less significant digits),
“tot2”
- medium part of total flow counter,
“tot3”
-highest part of total flow counter (most significant digits),
If value
“tot2”
or
“tot3”
is selected, meter automatically switches display to non-
zero part of total counter result. Flashing (or not, if result is shorter than 6 digits)
decimal points indicates which one part is actually displayed.
7.3.7.
“FiLtEr” menu
This menu contains parameters referred to additional data (result) filtration.
“vALUE”
- this parameter sets filtration rate. It can be set to values from 0
(no filtration ) to 5 (strongest filtration – time window about 3.5 sec.).
“droP”
- this parameter defines minimum percentage change of measured value which turns
off (temporally) data filtration. Value of this parameter can be changed in range:
0 ÷ 199,9%. Main purpose of this parameter is acceleration of displaying data
changes, when sudden changes of instantaneous measurements value occur (while
parameter
“vALUE”
is set to high values).
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