User manual for flow meter with pulse input SPI-94
Modes of the control can be changed depend on the values of parameters
“vALUE”
,
“SEt P”
,
“SEt P2”
,
“HYSt ”
,
“modE”
,
“t on”
,
“t oFF”
,
“unit”
and
“ALArmS”
(available in
”
rELAy1
” ÷ ”
rELAy4
” menu). If relay is controlled due to total flow counter value
(
“vALUE”
=
”tot”
), additional parameters are available in menu. Parameters
“t PrEC”
and
“t unit”
defining the unit and resolution of displayed thresholds and hysteresis of selected
relay.
Depend on
“modE”
parameter, relays can be not used or controlled over one or two
thresholds values.
If one threshold is used (Figure 6.3) the relay can be turned on (
“modE”
=
”on”
) or off
(
“modE”
=
”oFF”
) when the input signal value is contained in
zone A.
If two thresholds are
used (Figure 6.4) the relay will be turned on when value of input signal is contained in
zone A
(
“modE”
=
”in”
) or
zone B
(
“modE”
=
”out”
) and turned off if the signal is contained in the
second one.
Figure 6.3. One threshold control of the relay/LED outputs
Figure 6.4. Two threshold control of the relay/LED outputs
The relay outputs and LEDs (named
R
) can be controlled depend on both - the
current value and the peak value (when peak detection is active, for flow rate only)
of the input signal.
19
zone A
zone B
measure
”SEt P” parameter
”HYSt” parameter
state of
relay/LED
zone B
zone A
zone B
measure
”SEt P” or ”SEt P2” parameter
”HYSt” parameter
state of
relay/LED
i
