HCC-95P Series
HITROL CO.,LTD.
7
Installation
Precautions
for
Installation
- If more than one level switch is installed in a tank, the distance between each probe
shall be at least 300mm apart. (If the distance between probes is short, it may be
affected by the interconnection of the instrument, causing unstable operation.)
- For side mounting installation, an inactive rod shall be located at least 50mm inside of
tank, and it is recommended that the probe be tilted by 15 degrees to the horizontal
surface. (A foreign object between the nozzle and the probe may cause malfunction.)
- Probe shall be installed to avoid the inlet side of the measuring instrument, and the
protector shall be installed to prevent damage to the probe. Protector shall have
sufficient area to protect the sensor from incoming medium and be installed at a
distance that does not affect sensor operation.
- For side mounting installation, the cable entry shall be installed facing the ground to
maintain the waterproof function.
- When installing on the low level, carefully install the dead stock and material bridge.
- If the medium in the tank is liquid, set the Time Delay appropriately to delay the
operation of the output relay.
- For outdoor installation, it is recommended to install the sun cover to avoid the effects
of temperature increases.
- In case of tank with stirrer, the probe shall be installed at a safe distance from the
stirrer.
The capacitance type level switch can be installed in screw (PT, NPT, PF, etc.) and flange
(ANSI, JIS, DIN, etc.) as well as tri-clamp and other various locations.
Pay attention to the following matters during installation.
■
Side Mounting Installation
Highly sensitive measurement is available because it measures the level by whole of
probe but it shall be installed slopingly, forwarding of sensor to the bottom in order to
avoid a malfunction caused by build-up of the medium on the sensing probe.
■
Top Mounting Installation
This installation is not much affected by build-up of the medium on the probe but the
sensitivity is lower than side mounting because it measures the level by the end of probe
only, and it is not suitable to detect a level of the medium which has a low dielectric
constant.
