<6. Maintenance>
6-6
IM 01C25W01-01EN
6.6 Disassembly and
Reassembly of Connection
Adapter of Inner Diaphragm
Type Seal
• Removing the connection adapter, exercise
care so as not to damage the diaphragm
surfaces.(See figure 4.3)
• When re-mounting the connection adapter, use
the new gasket as shown in the table.
• Install the connection adapter, and use a torque
wrench to tighten the four bolts uniformly to a
torque of 59N·m.
• After the pressure detector section has been
reassembled, a leak test must be performed to
verify that there are no pressure leaks.
Part No.
Description
F9270AM
For general use
F9270AM-A For oil-prohibited use
F9994CA
For high temperature use
F9300AS
For special material
F9300AT
For special material and oil-prohibited
use
F9994CC
For high temperature and oil-prohibited
use
6.7 Troubleshooting
If any abnormality appears in the measured values,
use the troubleshooting flow chart below to isolate
and remedy the problem. Since some problems
have complex causes, these flow charts may
not identify all. If you have difficulty isolating or
correcting a problem, contact Yokogawa service
personnel.
6.7.1 Basic Troubleshooting
First determine whether the process variable
is actually abnormal or a problem exists in the
measurement system.
If the problem is in the measurement system,
isolate the problem and decide what corrective
action to take.
This transmitter is equipped with a self-diagnostic
function which will be useful in troubleshooting,
and the transmitter equipped with an integral
indicator will show an alarm code as a result of self-
diagnosis.
See subsection 6.7.3 for the list of alarms.
See also each communication manual.
Abnormalities appear in measurement.
: Areas where self-diagnostic offers support
Is process variable
itself abnormal?
Inspect the
process system.
Isolate problem in
measurement system.
Does problem exist in
receiving instrument?
Check/correct
environmental conditions.
Inspect receiver.
Check transmitter.
Check/correct operating
conditions.
Measurement system problem
F0605.ai
YES
NO
NO
YES
Environmental conditions
Operating conditions
Transmitter itself
Figure 6.5
Basic Flow and Self-Diagnostics
