HM-95 Series
HITROL CO., LTD.
14
Failure Check
Cautions for
Removal
Transportation and
Cautions for
Assembly
Cautions for
Installation
Cautions for
Grounding
If there is a problem with operation, check the following first.
■ Remove the cover and check if the output of the micro switch works fine.
Connect a tester to COM and NO or NC to check the output, and if there is a problem,
replace the micro switch.
■ After checking the micro switch, remove the product from the vessel and move the float
up and down to see if the switch block magnet responds to the core.
■ Recheck if the float and level of object to be measured are leveled.
■ Recheck if the float is positioned on top of the object to be measured.
■ Pay special attention to prevent any impact on the product during transport or assembly.
The impact may directly lead to a failure.
■ When attaching the product to a vessel, pay attention to prevent any damage to the assembly
packings.
■ Check the level and presence of object to be measured in the vessel before removing it.
■ The product may be overheated so wear gloves to prevent burns.
■ If there is explosive gas in the atmosphere, do not open the cover.
■ Make sure that any O-ring or gasket is not damaged while opening or closing the cover.
■ To remove the cover of an ex-proof product, release the lock key first.
■ Use the same standard flange or screws.
■ Make sure to insert washers between bolts and nuts to prevent loosening.
■ Make sure to insert gaskets between flanges.
(Select the gaskets in consideration of the temperature of the content and the pressure of the
container.)
■ Install an ex-proof product in an ex-proof zone.
Make sure that the product would not be subject to any high impact during transport
or assembly.
External ground is located on top of the cable entry, and the grounding wire to connect e
xternal ground must be 4 mm
2
(4 mm SQ). (Internal ground is connected before shipment.)
Make sure to insert a washer if the terminal lug is removed from the
ground terminal and then reconnected (to prevent loosening).
