KROHNE optiplex 1300 c, Handbook

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Handbook OPTIFLEX 1300 C
OPTIFLEX 1300 C 82
7.1.2 Blocking distance
Definitions
A1, the top blocking distance
The minimum distance from the flange to the top limit of the measuring range. The measurement displayed
on the gauge will freeze below this distance and an error warning will indicate that the level has reached the
blocking distance.
A2, the bottom blocking distance
A length at the end of the probe where measurement is not possible. For products with very low dielectric
constants
ε
r
< 5), accuracy may be affected in a non-linear zone up to 150 mm or 6” above the bottom
blocking distance, A2.
D, the non measurement zone
A zone where measurements cannot be taken (that is to say the counterweight, turnbuckle, and so on*).
The measurement displayed on the gauge will freeze.
*especially for cable probes
L, the probe length
The length specified by the customer in the order including the counterweight.
Blocking distance
The size of the device's dead zones depends on the type of probe fitted.
Top dead
zone ε r=80*
Bottom dead
zone ε r=80*
Top dead
zone ε r=2.3**
Bottom dead
zone ε r=2.3**
Probes
[mm or inch] [mm or inch] [mm or inch] [mm or inch]
Single cable Ø8 mm or 0.3"
200 or 8" 10 or 0.4" 250 or 10" 50 or 2"
Single cable Ø4 mm or 0.15"
200 or 8" 10 or 0.4" 250 or 10" 50 or 2"
Single rod
200 or 8" 10 or 0.4" 250 or 10" 50 or 2"
Double cable
125 or 5" 10 or 0.4" 165 or 6½" 50 or 2"
Double rod
125 or 5" 10 or 0.4" 165 or 6½" 50 or 2"
Coaxial
10 or 0.4" 10 or 0.4" 10 or 0.4" 50 or 2"
*The dielectric constant,
ε
r
, of water is 80. **The dielectric constant,
ε
r
, of oil is 2.3.