12
G
PREMASREG
®
716x
TYPES OF MONITORING:
(A) Below-atmospheric pressure:
P1 (
+
) is not connected, but open to the atmosphere
P2 (
–
) connected to inside of duct
(B) Filter:
P1 (
+
) connected upstream of filter
P2 (
–
) connected downstream of filter
(C) Ventilator:
P1 (
+
) connected downstream of ventilator
P2 (
–
) connected upstream of ventilator
(D) Volume flow:
P1 (
+
) dynamic pressure, Connected in flow direction
P2 (
–
) static pressure, Connected free of dynamic pressure components
(E) Level:
P1 (
+
) Connection submerged in medium
P2 (
–
) Connection is open to the atmosphere
Pressure connections at the pressure switch are marked with
P1 (
+
) for higher pressure and
P2 (
–
) for lower pressure.
Mounting diagram
(A)
(B)
(C)
(D)
(E)
Function types
Volume flow rate
V =
k · √∆ p
V = Volume flow in m
3
/h
k
= K factor 1...3000
∆ p
= Differential pressure in Pa
Differential pressure
∆ p
= p
+
–
p
–
∆ p
= Differential pressure in Pa
p
+
= higher pressure
p
–
= lower pressure
Filter contamination
S = 100%
·
∆ p
÷
p
Filter
S = Contamination degree in %
∆ p
= Differential pressure in Pa
p
Filter
= differential pressure
filter replacement in Pa
Level display
h =
∆ p
÷
(
ρ
· g)
h = Fill level height in cm
∆ p
= Differential pressure in Pa
ρ
= Density 700...1300 in kg/m
3
g
= 9.81 m/s
2
Measuring range mode
(Mode selectable)
DIP
1
Small value suppression
(measured
values < 1% of end value (pressure) = 0)
DIP
2
Relay
(Function adjustable)
DIP
3
Unidirectional ( 0 ...+MR ) (default) OFF
Deactivated (default)
OFF
Deactivated (default)
OFF
Bidirectional (–MR ...+MR )
O N
Active
O N
Active (display shows switching point)
O N
Measurement signal filtering
(Time interval selectable)
DIP
5
Service mode
(display adjustable)
DIP
6
10 s (default)
OFF
Standard (according to configuration) (default)
OFF
1 s
O N
Service (differential pressure in Pa)
O N
