Microsensor MPM489WZ1 Operation Manual page 12

9.2 Maintenance
MPM489WZ1 Level Transmitter does not need to be maintained
regularly, but please pay attention to items in the below for better
operating effect and reliability.
a) Check wire connection is reliable or not, and the cable is broken and
old or not.
b) Clean the protection cap and diaphragm cavity periodically (be
careful!)
c) Don't violently pull cables or poke the diaphragm with metal or other
hard objects.
9.3 Fault Diagnosis
MPM489WZ1 Level Transmitter use integrative full-sealed construction
without movable parts inside, have advantages of long-term stability and
reliability.
If some failure occur, such as no output, output too big or too small or
unreliable, please turn off the excitation firstly, then check the installation
and wire connection conform with the operation manual or not, the
excitation is correct or not and the reference tube is unobstructed or not.
If unsuccessful, the transmitter may be destroyed, please contact our
company.
10