ProMinent DULCOMETER diaLog DACb Assembly And Operating Instructions Manual page 56

Assembly and installation
Fig. 31: Coaxial cable:
1. Protective sleeve
2. Insulation
3. Inner conductor
4. Outer conductor and shielding
Fig. 32: Coaxial cable construction
There are two connection types:
Switching the controller to a measure‐
ment with potential equalisation
56
1.
2.
4.
There is a connection type without potential equalisation (unsym‐
metrical connection type) or a connection type with potential equal‐
isation (symmetrical connection type).
When is potential equalisation used?
Use potential equalisation if the pH/ORP measure‐
ment is interfered with by interference potentials
from the sample media. For example interference
potentials may be produced by electric motors with
incorrect interference suppression or due to insuffi‐
cient galvanic insulation of electrical conductors
etc. The potential equalisation does not cancel this
interference potential, it does however reduce its
effect on the measurement. Therefore, ideally elim‐
inate the source of the interference potential.
NOTICE!
Wire jumper with connected potential equalisation
A measurement with a wire jumper and connected
potential equalisation produces incorrect measured
values.
3.
A0948
A0947