Troubleshooting
Indication
Probable cause
Work-around
Solution
All LEDs are OFF
Even proper voltage is available
Power section of sensor electronic
insert is failed
Sensor electronic insert is needed to be replaced
.
Calibration and settings are all OK
but mA reading abruptly change or
chatters continuously
Power supply carrying extra noise and
capacitance amplifier picking the noise
Ground is not properly connected
Make necessary arrangements to filter the
noise in power-line before being fed to the
device
Provide an exclusive earthing to terminal#
3, capacitance enclosure earthing screw
and capacitance probe process connection
(device mounting screw or flange)
Device contains sufficient filtering of power supply noise
inside, but sometimes external earth is needed to make
filters sink the extra power supply noise back to earth,
connect proper ground.
After calibration current meter showing
21mA and status LED blinking fast
continuously (Error)
Sense and earth part of probe are shorted
Wrong calibration done at same level
Recalibrate at different level or replace the probe if
shorted.
Check if probe sense part are shorted with
ground / PTFE insulation is break and
conductive liquid are entered into it
Maintenance and Spares
Top Cover
Electronic Insert
connection terminals
electronic insert fixing screw
4-way male connector for sensor (probe)
4-way female connector from sensor (probe)
Cable glands
Thermal spacer (where needed)
Process connection
Stilling well tube
Device enclosure
Shown on the left are various parts of TLC2 capacitance level switch.
Separatable parts are
1. Electronic insert in short called 'electronics'
2. Probe + Enc Cover + Glands collectively called 'mechanical'
For maintenance issues involving replacement of 'electronics', just a
single fixing screw is needed to be released.
Lift the electronics slowly by holding electronics with one hand and
mechanical with other, as wires are connected using rigid 4-way
connectors to it.
Disconnect 4-way connector by holding electronics with one hand and
female of connector by other hand, while the rest of the device is at rest.
Connect the new replaced sensor. 4-way connector is unidirectional and
only connects in proper direction.
Set the electronics properly to its position.
Match the mounting screw hole of electronics with that of enclosure and
fix the screw.
For mechanical issues please send the entire device back to Trumen.
tlc2-manual-page04
www.trumen.in
4
Current meter showing 21mA and status
LED blinking rapidly rapidly by a short
interval (Error)
Current meter shows 20mA very early
before material level reach at 100% level
High capacitance at probe
Probe is too long for TLC2 in conductive
liquid or water
Wrong Position of Range switch no.5
Check probe length in conductive liquid /
water if probe length is arround 2500mm or
above
Change the range from 1500 to 4200pF using switch no.5
Throw the switch no.5 to its ON position.