Aalborg Vortex Insertion - Manual (Page 77)

72
NO. INDICATION LIKELY REASON SOLUTION
6 The Temperature*
reading on the
LCD is not correct
(out of the device
measurement
range: -20 to
260C)
* - for devices
with T/P option. RTD connector got
loose and is not
connected to the
PCB board. Check RTD connector on the terminal PCB, make
sure it is firmly attached to the header J3.
RTD sensor is
defective With power applied to the flow meter, navigate to
Submenu L1 “Diagnostic Menu” and select “T/P
ADC Out” menu option. The T value should be
around 840 counts at room temperature
(20 - 25 °C). Using ESD precautions and hazardous
area precautions, remove the electronics enclosure
window cover. Remove electronics assembly unit.
Disconnect the RTD temperature sensor connector
from the header J3 on the terminal board. Measure
the resistance across the outside pins of the
temperature sensor connector. It should read
approximately 109 ohms at room temperature
(higher resistance at higher temperatures). Contact
factory with finding.
7 The Pressure*
reading on the
LCD is not correct
(out of the device
measurement
range or does not
react on pressure
change in the
process line)
* - for devices
with T/P option. Pressure sensor
connector got loose
and is not connected
to the PCB board. Check pressure connector on the terminal PCB,
make sure it is firmly attached to the header J2.
Pressure sensor is
defective With power applied to the flow meter, navigate to
Submenu L1 “Diagnostic Menu” and select “T/P
ADC Out” menu option. The P value should be
around 900* counts at ambient pressure (14.7
PSIA) * this value only applicable for pressure
sensor with full scale range 100 PSIA. Consult
factory if your flow meter has different pressure
range.
8 The Flow Meter
Diagnostic Alarm
Event with code 0
– “CPU Temp.
High” is active. MCU temperature is
too high (overload). Disconnect power from the Vortex flow meter. Make
sure the ambient temperature is within specified
range (below 65 °C). Let the device cool down for at
least 15 minutes. Apply power to the flow meter and
check Diagnostic Alarm Event. If overload condition
will be indicated again the unit has to be returned to
the factory for repair.
9 The Flow Meter
System Event with
code 24 - “Fatal
Error” is active. Fatal Error (EEPROM
or SRAM corrupted) Cycle the power on the Vortex flow meter. If System
Event with code 24 indicating again the unit has to
be returned to the factory for repair.