
Electromagnetic Flowmeter M-910
24
Operation manual
Mode k) with non-zero hysteresis:
Mode l) with non-zero hysteresis:
QP value represents volume for 1 impulse and can be set independently to the nominal diameter of sensor. QP
value can be changed after selecting modes “b”, “c” or “d”. Following values are pre-set:
Impulse output standard factory setting:
Mode
„Positive flowrate“.
QP
1000 litres
PF1
limit corresponds to the required nominal flowrate -Q
N
PF2
limit corresponds to the required nominal flowrate Q
N
H
hysteresis corresponds to the required nominal flowrate Q
N
/10
Parameters PF1, PF2 and H are common for frequency, impulse and status mode.
5.2.1.4
Pulse width (1.4 PULSE WIDTH)
Function enables to change the pulse width of “Impulse Output” in milliseconds after pressing key ENTER. With
keys “Up” and “Right” any value between 10 millisecond and 2500 milliseconds can be set. To change the
currently valid value to the new value press the key ENTER. Key ESC discards changes.
Note: Pulse width can be set with 10 ms resolution (values 10, 20, 30, …).
Following values are pre-set:
Pulse width standard factory setting:
Pulse width
100 milliseconds
5.2.1.5
Status output (1.5 OUTPUT S)
Status output is formed by relays. Maximum switched voltage is 100 V. Maximum switched current should not
exceed 500 mA. First output is on terminal 8, second output is on terminals 5 and 7 (internally connected).
Status output can be programmed in one of the following modes:
a)
Off
output is not active (off state).
b)
On Pos.
output is off in case of negative flow and made in case of positive flow.
c)
On Neg.
output is off in case of positive flow and made in case of negative flow.
d)
On In
output is on, when flowrate is higher than PF1 and lower than PF2, otherwise it
is off.
e)
On Out
output is off, when flowrate is higher than PF1 and lower than PF2, otherwise it
is on.
f)
Dose On
output is on, when programmed dose is counting, otherwise it is off.
g)
Dose Off
output is off, when programmed dose is counting, otherwise it is on.
h)
On>F1
output is on, when flowrate is higher than PF1, otherwise it is off.
PF1 PF1+H
OFF
ON
PF1 PF1+H
OFF
ON