<6. Maintenance>
6-1
IM 21B03D01-01E
6. Maintenance
6.1 Overview
The PK200 converter components are structured
as units to allow easy maintenance.
This chapter describes cleaning of each component
and part replacement to be conducted for PK200
maintenance.
This converter is a high-precision instrument and
thus, read the following description carefully before
performing maintenance.
For maintenance, also see the operation items in
Chapter 5.
CAUTION
Cautions for intrinsically safe apparatus
Intrinsically safe apparatus shall be repaired by
the manufacturer.
Cautions for flameproof type instruments
(a) Flameproof type instruments must be, as
a rule, removed to a non-hazardous area
for maintenance and be disassembled and
reassembled to the original state. For details,
see “Installation and Operating Precautions
for TIIS Flameproof Equipment” later in this
manual.
(b) On the flameproof type instruments the
cover is locked by a setscrew. When a
setscrew is driven clockwise by an Allen
wrench, it is going in and cover lock is
released, and then the cover can be opened.
When a cover is closed it should be locked
by a setscrew without fail.
6.2 Periodic Inspection
Periodic inspection is required for maintaining
normal plant operations. During periodic inspection,
pay special attention to the following.
(1) Is the appearance normal?
(2) Is there pressure leakage from the converter or
its peripheral piping?
(3) Is drainage present, or is there adhesion of dust
or oil, in the air supply system?
Periodically clean the restrictor and
nozzle flapper, which are easily subject to
contamination. The following describes their
cleaning.
6.2.1 Cleaning the Restrictor
Remove the restrictor shown in Figure 6.1 using a
screw driver and thread a wire with 0.3mm dia. into
the restrictor for cleaning.
Figure 6.1
Restrictor Removal
Figure 6.2
Cleaning the Restrictor
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