Instruction manual

114
Corrosion Monitor High Alarm
This error message is caused by the 4-20 mA signal from the corrosion monitor exceeding the
user-programmed value for the high alarm limit.
Possible Causes Corrective Actions
The corrosion rate is too high. Determine the cause for the high corrosion
rate and correct it.
The high alarm limit is set too low. Go to the Corrosion Page and increase the
high alarm limit.
The corrosion monitor is not calibrated Go to the Corrosion Page and make sure that
correctly. the “4 mA =” and “20 mA =” values are set to
the corrosion rates at which the corrosion
monitor will put out 4 mA and 20 mA.
The corrosion monitor is faulty. Repair or replace the corrosion monitor.
Corrosion Monitor Sensor Error
This error message is caused by the 4-20 mA signal from the corrosion monitor being less than
3.9mA or greater than 21 mA.
Possible Causes Corrective Actions
Faulty transmitter. Make sure that the transmitter is functioning
by measuring the output using an ammeter. If
the output directly from the transmitter is less
than 4 mA, the transmitter is the problem.
Faulty wiring between transmitter and Repeat the measurement of the transmitter
analog input option circuit board. output at the 4-20 mA input option board
terminal strip. If this is less than 4 mA, then
the wiring is faulty. Also make sure that the
wires are attached to the correct terminals as
defined in the 4-20 mA Input Page. For
example, if 4-20 mA Input 3 is defined as a
corrosion input, make sure that the wires are
connected to Input 3. Make sure that the +
and – signals are connected to the correct
terminals.
Faulty analog input option circuit board. Replace the 4-20 mA input option board.