50-608 Kotron Model 811 RF Point Level Sensor
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3. Measure the resistance between the probe and ground
using the highest resistance scale available. If the resistance
measures 10 Megohm to infinity and is stable, the probe
is operating correctly. If the resistance measures less than
10 Megohm and/or is unstable, there may be a problem
with the probe.
2.3.3 Switch Chatter
1. Check for turbulence. If turbulence is present, increase
time delay until appropriate.
2. Check for proper power supply voltage.
3. Check for proper ground reference.
NOTE: If the application uses an insulated probe in a conductive
medium, it is helpful to have the medium at its highest possible
level. This aids in the detection of cuts or nicks in the insulation.
4. Inspect the malfunctioning probe for a cut in the insulating
sheath or looseness in the seal at the probe mounting nut.
5. Inspect the probe for a coating or build-up of conductive
medium.
6. Measure the resistance between the probe and ground
using the highest resistance scale available. If the resistance
measures 10 Megohm to infinity and is stable, the probe
is operating correctly. If the resistance measures less than
10 Megohm and/or is unstable, there may be a problem
with the probe.
7. If probe test is working properly, check for insufficient
ground, loose or broken wiring, including the white probe
wire. Also check continuity between probe mounting nut
and metal tank. There should be continuity (zero resis-
tance). If there is resistance, check for excessive teflon tape
used on the probe threads.
NOTE: If the above suggestions prove unsuccessful, consult factory.
