BKI16ATEX0018X ♦ htk4014a0600p_03 ♦ 73 / 76
Event Fault Action
“Delay out of limits” status
marker on*, reading is frozen.
The emitted pulse has not been detected.
The gauge will not work until it has been found.
The signal converter may need replacing. Please contact NIVELCO.
“Negative voltage error”*
“VC01 voltage error” *
“VC02 voltage error” *
“Reprogramming FPGA” *
Occurs when there is a problem with the time
base on the HF board.
Please contact NIVELCO.
*Gauge connected to PCSTAR2 software or HART Handheld Controller (HHC) with Marker status window (F8) or list displayed
Event Fault Action
General operation
Instrument is not accurate
with a product that has a high
dielectric constant. A constant
offset is observed when taking
measurements.
Tank height is not correct. Check current output and tank height parameters.
If the signal converter has been replaced, verify that factory calibration
parameters are still the same.
Ask NIVELCO for the factory calibration sheet (if not supplied) and the
password for access to the factory menu.
The MicroTREK 2-wire
indicates an incorrect level
value.
The MicroTREK 2-wire measures a non-valid
reflection.
Check the tank for obstructions and verify that the probe is clean.
In the case the indicated level is close to the nozzle, increase the detection
delay and the dead zone with the same ratio or increase the threshold level if
the full measurement range is essential.
In any case use the PC STAR 2 oscilloscope function to visualise and to
analyse the application.
The threshold level must be adjusted so that it masks the disturbances. It also
gives enough margin for detection of the level pulse.
Very large pulses along the measurement signal
(same amplitude as the initial pulse) can be caused by a probe which is
touching the nozzle or the tank side (see section 1.3.5). Ensure that no
contact is possible.
Instrument is not accurate
when there are two or more
phases in the tank.
The instrument may be incorrectly configured for
this type of application i.e. it is measuring the
interface instead of the level.
Contact NIVELCO for the corrective procedure or refer to the Service Manual.
Check that Factory Menu function 1.1.3: Application Type is set to “2 liquids, 1
level”.
Check also that there is a layer of more than 100 mm of top product above
the bottom product.
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