Prothermo NMT 538
42
Hauser Systems & Gauging
8
Error code
NMT538 has functionality of self diagnostic error detection for both electrical & mechanical
conditions. NMT538 also transmits those conditions to various error displays and message to
inform connected host gauge.
Note!
Most of error message remains even after correcting or fixing problems. Reset the software to
default setting (device configuration data will be remained) or turning the power supply once is
necessary
Error display
NMT538 has several numeric error status indication.
-49,5°C (-57.1°F): Element short
Element or wiring circuit on particular element number is electrically or physically short. Can be
shown either individual and / or average temp. matrix depending on error display set up.
358°C (676.4°F): Unsuitable element position
358°C will be shown on the liquid average temp. display when the liquid level is below the lowest
element position. On the other hand, 358°C is also shown on gas / vapor average temp. display
when all elements are completely submerged in the liquid.
358.5°C (677.3°F): Invalid element data reading
A display when operator seeks for non-existing element data. i.e. #12 element data on only 10
elements are connected. This is different from 359°C Element open. The entered value of
configured element number must meet the actual number of connected elements.
359°C (678.2°F): Element open
Element or wiring circuit on particular element number is electrically or physically open. Can be
shown either individual and / or average temp.
359.5 °C (679.1°F): Communication error
HART Communication error, caused by device to device local HART connection. Only NMS uses
this error display mainly for remote communication data transmission.
Chart 6: Error message
Message
Cause
Remedy
TEMP.COM.OPEN
Common line for elements
break.
Check the common line for
elements. Consult E+H
Service for replacement of
the temperature sensor.
TEMP.COM.SHORT
Common line for elements
short circuit.
Check the common line for
elements. Consult E+H
Service for replacement of
the temperature sensor.
ELEM.X OPEN
X = 1...16
No. x element (or line) break.
Check the element. Measure
the resistance by attaching a
Digital Multimeter rod to the
connector. (*)
ELEM. XSHORT
X = 1...16
No. X element (or line) short
circuit.
Check the element. Measure
the resistance by attaching a
Digital Multimeter rod to the
connector. (*)
(*) Never use an analog-type tester, which would allow too much electric current to
flow to the measuring element when determining the resistance. The current
should be limited to 1 mA or less during such a test.
8 Error code
