4-5
Chapter 4 Maintenance and Troubleshooting of this Device
4-1-4 Cleaning the Device
(1) Introduction
In order to maintain the performance specifications of the transmitter, it is necessary to thoroughly
clean the transmitter and pipes. If, for example, sediment accumulates in the pressure chamber of
the transmitter, it can cause measurement errors.
(2) Cleaning the Main Unit (JTD,JTG,JTA and JTC)
(i) Procedure
(1) Remove the bolts and nuts, and detach the main unit cover.
(2) Clean the diaphragm, the inside of the main unit cover, etc., using a soft brush and solvent.
When doing so, be careful not to deform or scratch the diaphragm.
(3) During re-assembly, replace cover gaskets with new ones as necessary.
(4) Fasten bolts and nuts to the prescribed fastening torque (Table 4-1).
When measuring and stopping operation of a device in a cold area in which there is a risk that
water (etc.) may freeze, remove the water from the main unit. Loosen the drain plugs.
(3) Cleaning Remote Seal Models
There is no need for routine maintenance and inspection. If the flanges are removed for
maintenance, clean the diaphragm with a soft brush and solvent. When doing so, be careful not
to deform or scratch the diaphragm.
(4) Cleaning the Drain Ring Assembly and 1/2B Remote Adapter
If sediment has accumulated in the vent/drain plugs, the process fluid may not be sufficiently
vented/drained. Using a soft brush and solvent, clean the drain ring assembly and 1/2B remote
adapter. When doing so, exercise care not to deform or scratch the gasket surfaces and the thread
seal. When measuring and stopping operation of a device in a cold area in which there is a risk that
water and/or other objects or substances may freeze, loosen the drain plugs to remove the water
from the vents and drains.
4-1-5 Replacement of Electronics Module
The electronics module on the indicator-integrated terminal block can be replaced. Use the
following procedure.
• Replacement Procedure
Use the following procedure to replace the electronics module.
Caution
The electronic components on the electronics module are susceptible to damage from
electrostatic discharge. Avoid touching them with your hands. If you need to touch
them, bring your body's electrical potential to the same potential as that of the electronic
components before touching them.
Place the removed electronics module into a conductive bag to protect it from damage
due to electrostatic discharge.
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