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Handling Precautions
To obtain the optimum performance from LF516/LF546 flowmeter for years of continuous operation,
observe the following precautions.
(1) Do not store or install the flowmeter in :
Where there is direct sunlight.
Where excessive vibration or mechanical shock occurs.
Where high temperature or high humidity conditions obtain.
Where corrosive atmospheres exist.
That can be places submerged under water.
Where there is a sloped floor. To put the flowmeter temporarily on the floor, place it carefully
with something, such as a block, to support it so that the flowmeter will not topple over.
Places where there is following factors.
Factors to impede infrared switch to operate properly
Intense light such as direct sunlight and reflected sunlight by window glass or metal plate
Place where brightness changes suddenly such as ON/OFF of lighting
Dense smoke or steam near the control panel
Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and
haze due to their attachment
Light reflecting object near the control panel, or reflecting object such as metal plate placed
opposing to the control panel
When any of above factors is considered, take a measure for the proper operation of infrared
switch such as to place a cover or to secure a space for at least a person to stand in front of the
control panel.
When unable to avoid above factors, operate the EMF converter removing the factor by
covering the control panel by hand so that light does not shine on it, by cleaning those attached
on the control panel, or by standing in-between the reflecting object and the control panel to
block the light.
(2) Wire cables correctly and securely.
Be sure to ground at the combined converter side (grounding resistance 100Ω or less). Avoid
a common ground used with other equipment where earth current may flow. An independent
ground is preferable
(3) Select cable paths away from electrical equipment (motors, transformers, or radio transmitters),
which causes electromagnetic or electrostatic interference.
(4) The cable lead-in section must be tightened securely to keep air tightness.
NOTE : The cable connections are not provide with flowmeter. Because 1/2-14NPT screw
holes are processed to this place, please prepare yourself for the cable connections.
(5) If the inside of the converter or cable terminals are wetted or humidified, it may cause insulation
deterioration, which can result in fault or noise occurrence. So do not conduct wiring in the
open air on rainy days.
Also, be careful not to wet down the converter even in the case of indoor wiring, and complete
wiring work in a short period of time.