E3A-MA3A-H11 Datasheet, PDF (30/48 Pages) Magnetrol International, Inc. – Digital E3 Modulevel with HART® and PACTware™ Communications Liquid Level Displacer Transmitter

3.3.2 Status Messages
The E3 Modulevel transmitter utilizes a 3-section hierarchy
for reporting diagnostic conditions: FAULTS, WARNINGS,
and INFORMATION. This information can be reviewed at
the STATUS screen in the user menu. This screen captures
only current conditions. Historical information can be
viewed at the HISTORY screen in the Factory menu.
FAULT: The highest level in the hierarchy of diagnostics
annunciating a defect or failure in circuitry or software that
precludes reliable measurement. In the presence of a fault,
the current (mA) value is 3.6, 22, or HOLD depending on
the “Fault” loop current value selected. A message is also
displayed on the rotating screen. Further error information
can be obtained by viewing the Status History in the
Factory Menu.
EFFECTS OF EACH DIAGNOSTIC MESSAGE
Loop
Status Status
Output Message History
Fault
3.6/22/HOLD
Yes
Yes
Warning
No Effect
Yes
Yes
Information No Effect
No
Yes
WARNING (MESSAGE): The second level in the hierarchy
of Diagnostics annunciating conditions that are not fatal
but may affect measurement. A message will occur on the
main (rotating) screen when a Warning is detected but will
not affect output current. Further error information can be
obtained by viewing the Status History in the Factory Menu.
INFORMATION (MESSAGE): The lowest level in the
hierarchy of diagnostic conditions providing operational
factors that are not critical to measurement. Further error
information can be obtained by viewing the Status History
in the Factory Menu.
Figure 15
LVDT Six-Pin Connector
3.3.3 Checking the LVDT Winding Resistance
WARNING: To prevent ignition of explosive atmospheres,
disconnect power before servicing.
Refer to Figure 15 during this procedure.
1. Remove power from the unit.
2. Remove the electronics housing cover and the electronics
bezel assembly.
3. Disconnect the six-pin connector J1 from the back of the
PC board assembly.
4. Using a multimeter, check the primary winding by verifying
that pins 1 and 4 of the six-pin connector have approxi-
mately 75 to 105 ohms resistance.
5. Check the secondary winding by verifying that pins 2 and 5
or pins 3 and 6 of the six-pin connector have approximately
70 to 100 ohms resistance.
6. If the winding resistance is out of range, replace LVDT.
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48-635 E3 Modulevel Displacer Level Transmitter