HM-90&95-Ex Series
HITROL CO., LTD.
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For maintenance, check for the presence of the object to be measured in the tank first.
Learn how to adjust the switch block before adjusting it, and contact the headquarters or
dealership for any replacement required.
Maintenance
Regular inspection helps in using the product in the optimal condition. As such, it is
recommended to conduct annual inspection and maintenance.
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Cage
The cage is designed to endure high temperature and pressure, and its safety is
confirmed with nondestructive and water-pressure tests. However, corrosion can
lead to leakage in a harsh working environment. As such, regular visual inspection
and test are required.
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Housing
Check the sealing of the housing cover and wire inlet to prevent dust or rain from
penetrating. Also, replace the sealing if it is old or damaged.
Exposure to excessive heat or humidity may damage the wire inlet insulation. It
may lead to short circuit, so check the wiring and replace it if necessary in
advance.
If the terminal is not tightened, vibration may cause it to loosen.
Prepare a spare switch block so that the process can continue even if there is a
problem with the switch block.
The product can be removed from the vessel to check the contact of level switch
using liquid (e.g., water) and then reconfigure it.
Do not insulate the housing and cooling fin.
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Check Ex-proof rating and fluid temperature before applying an Ex-proof product. If the
temperature of measure object exceeds 350˚C, cannot use an Ex-proof type product.
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If the temperature of measure object exceeds 120˚C, use a high-temperature product, and
insulate the main unit and connection as shown below.
