33
UK
The indicated values for [OP] refer to the distance between OP and the
lower edge of the probe.
The values apply if [OFS] = [0].
With [OFS] > [0] the values increase by the set OFS value.
Example LK3122: According to table 12-2 OP is set to segment 20.4 cm.
[OFS] = 7.0 cm
[OP] is set to 20.4 cm + 7.0 cm = 27.4 cm.
12.3 Calculation aids [OP]
For proper functioning of the overflow prevention OP the minimum distance
(y) (fig. 12-1) must be observed
(→ 6.1)
.
The following applies (fig. 12-1):
B + c = L + u
and
B = z + y
B: tank height
L: probe length
c: outside length
(maximum
→ 6
)
u: distance between probe and tank
bottom
y: required response level OP
from the cover (minimum
→
6.1, maximum
→ 12.2
).
z: required response level OP from the
bottom (maximum: z < L - c - y or
z < B - y).
12.3.1 Definition “from the cover“
Required distance (y) of the overflow prevention OP
“from the cover“ is defined.
• Without offset ([OFS] = [0]): [OP] = L - c - y
• With offset ([OFS] = u):
Example LK3122:
c = 3.0 cm, y = 5.0 cm, u = 1.0 cm
Without offset: [OP] = 26.4 cm - 3.0 cm - 5.0 cm
= 18.4 cm
With offset: [OP] = 26.4 cm - 3.0 cm - 5.0 cm - 1.0 cm
= 19.4 cm
Fig. 6-3
OP
c
z
B
L