2
、
Zero point instability
Start
Check instrument grounded
case,The grounding ring and
the grounding wire is
connected?
Good grounding?
Conductivity of liquid is
volatile?
The conductivity is lower
than 20µs/cm
Flowmeter is near the
motor, transformers?
and use of public land to
those equipment ?
Suspected insulation problem in
flowmeter, contact with manufacturers
Fully shielded instrumentation
flowmeters should far from
these devices.
Independence grounding
facilities
Remove sludge and scale on the
electrode and near side.
Install meters to vertical
1To ensure that changes in the scope of
the conductivity of the liquid does not
exceed the scope of permissible;
2)Pls don’t apply instrument in this
situation for conductivity lower than 20
µs/cm
In accordance with the(sensor Manual)
correctly grounded
(Grounding resistance of less than 10Ω)
change valve
In the instrument on the downstream
side of pipe to open a pore, it is easy to
be able to find whether there is any air
bubbles; particular attention to the level
of the installation of the instrument to
change the install location or change
the flow of upward vertical installation in
order to fluid filled sensor tube
Full medium in Tube sensor?
No
No
No
No
No
No
No
Mixture of liquid bubbles?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Install getter device on
upper stream of flowmeter
Any leakage of the valve?
Caused by fluid accumulation?
42
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