Yokogawa EJA110A - Manual (Page 64)

IM 01C21B01-01E 9-8
9. MAINTENANCE
Connect BRAIN TERMINAL and check self-diagnostics.
Contact Yokogawa service personnel.
F0909.EPS
Are valves opened or
closed correctly?
Is impulse piping
connected correctly?
Refer to error message summary in
Subsection 8.5.2 to take actions.
Refer to Section 6.6 for rated voltage
and load resistance.
Provide lagging and/or cooling, or allow
adequate ventilation.
Refer to Section 9.2 when selecting
instruments for calibration.
Fully close equalizing valve, and fully
open high pressure and low pressure
valves.
Refer to individual model user manuals
and connect piping as appropriate for
the measurement purpose.
Adjust the output.
Is transmitter
installed where there is
marked variation in
temperature?
Is output adjusted correctly?
Large output error.
Does the self-
diagnostic indicate problem
location?
Are power supply
voltage and load resistance
correct?
Were appropriate
instruments used for
calibration?
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES