072.500 FINDER, 072.500 Datasheet - Page 6

• Manufacturer Part Number: 072.500
• Description: ELECTRODE, 500MM
• Manufacturer: FINDER

Specifications of 072.500

• Svhc: No SVHC (15-Dec-2010)
• Body Material: Stainless Steel
• Level Sensor Type: Liquid
• External Length / Height: 500mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Emptying functions
Wiring diagram
Wiring diagram
Applications for 72.01 and 72.11
6
FILLING function:
Examples with 3 electrodes and with a
contactor connected to the contact.
Type 72.01
L/+
N/-
Type 72.11
L/+
N/-
Type 72.01
L/+
N/-
Type 72.11
L/+
N/-
L1
L2
L3
N
A1 A2
B1 B2 B3
B1 B2
B1 B2 B3
A1 A2 12 11 14
B1 B2 B3
A1 A2
A1 A2 12
LEVEL
LEVEL
LEVEL
LEVEL
12
B3
12
Z1 Z2
Z1 Z2
11 14
11 14
11 14
U = 24 V DC
U = 24 V DC
S
24 V AC 50/60 Hz
(110...125)V AC 50/60 Hz
(230...240)V AC 50/60 Hz
24 V AC 50/60 Hz
(110...125)V AC 50/60 Hz
(230...240)V AC 50/60 Hz
Max
R = (5…150)kΩ
R = (5…150)kΩ
B1 B2 B3
A1 A2
T = 1 s
R = 150 kΩ
T = 1 s
R = 150 kΩ
Min
Z1 Z2
Z1 Z2
Com
EL
EL
E = Emptying
E = Emptying
12
FL
FS
ES
EL
FL
FS
ES
EL
11 14
Examples with 3 electrodes
Examples with 2 electrodes
Level
Level
U
B1 B2 B3
EMPTYING function:
Examples with 3 electrodes and with a motor
pump connected directly to the contact.
T
L1
L2
L3
N
T
S
Max
B1 B2 B3
A1 A2
Min
Com
12 11 14
T
72 Series - Monitoring relays 16 A
T
T
The 72 series level control relays work by
measuring the resistance through the liquid,
between the common (B3) electrode and Min. and
Max. electrodes (B2 and B1). If the tank is metalic,
then this can be substituted as the B3 electrode.
Take care to ensure that the liquid has a
suitable resistivity – see below:
SUITABLE LIQUIDS
- City water
- Well water
- Rainwater
- Sea water
- Liquids with low-percentage alcohol
- Wine
- Milk, Beer, Coffee
- Sewage
- Liquids fertilizer
UN-SUITABLE LIQUIDS
- Demineralised water
- Fuels
- Oil
- Liquids with high-percentage alcohol
- Liquid gas
- Paraffins
- Ethylene glycol
- Paint
Emptying Control – between Max.
and Min. levels.
Under normal operation the liquid
level can be expected to cycle
between the Maximum and the
Minimum electrodes, B1 and B2 (plus
a degree of over and under-shoot).
Switch On:
• On “power-up”, if the liquid level
is above B2 the output relay will
operate after time T has expired.
• On the liquid level rising to B1, the
output relay will operate after time T
has expired.
Switch Off:
• On the liquid level falling below
electrode B2, the output relay will
de-energise after time T has expired.
• On “power-off”, the output relay
will immediately de-energise.
Emptying Control about a single level,
B1.
Under normal operation the liquid
level can be expected to cycle about
the level set by electrode B1 with a
degree of over and under-shoot.
Switch On:
• On “power-up”, if the liquid is
above B1 the output relay will
operate after time T has expired.
• On the liquid level rising to B1, the
output relay will operate after time T
has expired.
Switch Off:
• On the liquid level falling below
electrode B1, the output relay will
de-energise after time T has expired.
• On “power-off”, the output relay
will immediately de-energ