<8. Maintenance>
8-8
IM 01C25W05-01EN
YES
NO
NO
NO
YES
YES
NO
YES
NO
NO
YES
NO
YES
F0807.ai
Does the
process pressure stays
within the transmitter’s
pressure
rating?
YES
Connect HART configuration tool and check self-diagnostics.
Does
the self-diagnostic
indicate problem
location?
Are high
and low pressure side
diaphragm seals correctly
connected to the
process?
Contact Yokogawa service personnel.
Adjust the zero point.
Refer to section 5.3 to check/correct
polarity at each terminal from power
supply to the terminal box.
Refer to section 4.3 to check/correct
the DRS cable connection.
Use the transmitter within the
measurement range shown on the data
plate.
Refer to error message summary in
Subsection 8.5.3 to take actions.
Output travels beyond 0% or 100%.
Is zero point adjusted
correctly?
Correct the connections.
Is the polarity of the
externally wired power
supply correct?
Is the DRS cable
connected properly?
Check the installation of the impulse
piping or process connections and take
necessary measure to avoid leakage.
Are there any pressure
leakage observed?
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
F0808.ai
Are power supply
voltage and load resistance
correct?
Is external noise
contained in the output?
Refer to Section 8.3 and select
instruments for calibration.
Refer to section 4.1 and mount it
correctly.
Connect HART configuration tool and check self-diagnostics.
Does
the self-diagnostic
indicate problem
location?
Contact Yokogawa service personnel.
Adjust the zero point.
Refer to section 5.6 for rated voltage
and load resistance.
Avoid noise by providing complete
Provide lagging and/or heat insulation,
or allow adequate ventilation.
Refer to error message summary in
Subsection 8.5.3 to take actions.
Output error is large.
Were appropriate
instruments used for
calibration?
Is output adjusted correctly?
Is
the mounting
of the impulse line or
diaphragm seal section
correct?
Is
transmitter installed
where there is marked variation
in temperature?
