Operation
VA 520 EN V1.21
page
35
o
45
10.3.3 Pulse /Alarm
Setup
→
Sensor Setup
→
Pulse/ Alarm
10.3.3.1 Pulse output
The maximum frequency for pulse output is 50 pulses per second (50Hz).
The Pulse output is delayed by 1 second.
Pulse value
[m³ /h]
[m³ /min]
[l/min]
0.1 ltr / Pulse
18
0,3
300
1ltr / Pulse
180
3
3000
0.1m³ / Pulse
18000
300
300000
1 m³ / Pulse
180000
3000
3000000
Table 1 Maximum flow for pulse output
Entering pulse values that are not allow a presentation to the full scale value, are not allowed. Entries are
discarded and error message displayed.
The galvanically isolated output can be
defined as pulse- or alarm output.
Selection of field
„Relay Mode”
with key
„
“
and change modus by pressing key
„OK“.
For alarm output following units could be
chosen: kg/min, cfm, ltr/s, m³/h, m/s, °F, °C
and kg/s.
„Value“
defines the Alarm value,
„Hyst.“
defines the desired hysteresis and with
„Hi-
Lim
“ or.
„Lo-Lim“
the alarm settings when
the alarm is activated
Hi-Lim: Value over limit
Lo-Lim: Value under limit
For the pulse output following units could be
chosen: kg, cf, ltr and m³. The pulse value
definition to
be done in menu „
Value“
. Lowest
value is depending on max. flow of sensor and
the max frequency of pulse output of 50Hz.
With
„Polarity“
the switching state could be
defined. Pos. = 0
→
1 neg. 1
→
0
pos
neg
open
closed
