MEATEST
Electromagnetic flowmeter M921
Operation manual
27
f)
On Negative
output is HI in case of positive flow and LO in case of negative flow.
g)
On In
output is LO, when flowrate is higher than PF1 and lower than PF2,
otherwise it is HI.
h)
On Out
output is HI, when flowrate is higher than PF1 and lower than PF2,
otherwise it is LO.
i)
Dose On
output is LO, when programmed dose is being measured and HI when the
dose is out.
j)
Dose Off
output is HI, when programmed dose is being measured and LO when the
dose is out.
k)
On>F1
output is LO, when flowrate is higher than PF1, otherwise it is HI.
l)
On<F1
output is LO, when flowrate is lower than PF1, otherwise it is HI.
If setting of flow limit is chosen, hysteresis H can be set too. Hysteresis is a tolerance field on one side of
flow limits PF1 and PF2. The output status changes (indicates crossing over pre-set limit), when the
immediate flowrate crosses over the value PF2 (or goes below limit PF1). The output status comes back to
the default status, when the immediate flowrate decreases under the value PF2-H (or increases over limit
PF1+H) again.
Mode g ) with non-zero hysteresis:
Mode h) with non-zero hysteresis:
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.
Values PF1, PF2 and H are described in the chapter “LIMITS”.
5.1.3.2
Pulse width
Item allows setting pulse width in [ms]. Available widths are 2.5, 5, 10, 25, 50, 100, 250 and 500 ms.
5.1.3.3
Volume for 1 impulse (Qp 1 pulse)
Item allows setting the Qp constant. Qp represents the volume for one impulse.
PF1 PF1+H
PF2-H PF2
OFF
ON
PF1 PF1+H
PF2-H PF2
OFF
ON
PF1 PF1+H
OFF
ON
PF1 PF1+H
OFF
ON
