4-1
Chapter 4 Maintenance and Troubleshooting of this Device
Chapter 4 Maintenance and Troubleshooting of this Device
This chapter describes this device's data storage, assembly and disassembly, output checking,
calibration methods, and countermeasures if problems occur.
4-1 Assembly and Disassembly of this Device
4-1-1 Cautions During Assembly and Disassembly
Warning
When detaching this product from the process for maintenance and the like, clear vents
and drains in order to remove residual pressure and residues in the measurement target.
In addition, when clearing vents and drains, check the direction in which material
will come out in order to avoid any contact with the human body. There is a danger of
scalding and other harmful health effects. If the measured fluid is harmful to the human
body, take safety measures such as wearing goggles or a mask so that it does not adhere
to the skin or the eyes, become inhaled, etc.
Particular care must be exercised due to the fact that, for pressure-resistant, explosion-
proof transmitters, the pressure-resistant, explosion-proof performance specifications
may be lost as a result of corrosion, deformation, or scratching of the case or case cover,
or damage to the threaded portions or connecting surfaces.
Do not open the case cover in the hazardous areas described in 2-1-2 when the device is
powered up.
For pressure-resistant, explosion-proof model transmitters, the pressure-resistant,
explosion-proof performance specifications are ensured by locking the case cover. Fasten
the case cover completely, and be sure to lock it.
Replace damaged seal gaskets. If this product is operated in a damaged state, it will not be
possible to ensure sufficient performance of the seals, and there is a danger that the measured
fluid will spurt out, possibly resulting in scalding and other harmful health effects.
Use genuine parts as replacements. In particular, for gaskets, adapter flanges, and the
like, parts from other manufactures may in some cases fit into place, but they cannot
ensure pressure resistance and airtightness. The result may be leakage of the measured
fluid, with possible harmful effects on human health.
Be sufficiently careful of residues from measured fluids which are left behind in the
product. If materials which affect the human body are contained in these residues,
harmful effects on human health could result. When performing maintenance on
aproduct which has been uninstalled, first clean the pressure-receiving parts adequately.
If evidence of corrosion is observed in pressure-bearing parts such as through bolts,
nuts, and pressure-release rings, replace them. Parts whose pressure-resistance has
decreased can break and thus are dangerous. There is also a risk of physical injuries such
as bruises and lacerations caused by broken parts.
When loosening through bolts and nuts to remove the device, hold the drain ring
assembly to prevent it from falling off. If it falls because sufficient care is not taken, it can
cause injuries or product damage.
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