Operating And Usage; Precautions For Installation; Maintenance - Hitron HM-12 Series Instruction Manual

Operating
As per user's requirement, N.O (Contact A) and N.C (Contact B), both are available. However, if
and Usage
there is no special request, we are manufacturing the products with N.O (Contact A) as
standard. Types of contact signal are as below.
접점의 형태는 아래의 그림과 같습니다.
Precautions
- Use the same standard flange or screw.
- Make sure to insert washers between bolts and nuts to prevent loosening.
for
- Make sure to insert gaskets between flanges.
Installation
(Select the gaskets in consideration of temperature of content and pressure of vessel.)
- For Ex-proof zone, make sure to install an Ex-proof version only.
- After the installation is complete and the cover of the product is assembled, power it on.
- The product shall be installed with the direction of the cable entry downward.

Maintenance

The major parts of HM-12(10) Series to be checked are a float and magnet. The life spans
of major parts vary with user environments and can be used in optimum conditions
through periodic inspections. Therefore, the user shall maintain and repair the product
through periodic inspections conducted at least once a year. The appearance of the
product shall be visually checked to see if there is any damage, and if there is scale caused
by measure objects, it shall be removed for the smooth operation of the float.
■ Checkup for the micro switch can be simply conducted using a digital multimeter as below.
- Position the selector of digital multimeter to the buzzer and connect the test pins to
N.O or N.C contact signal and COM in the terminal block.
- Move a float upward or downward and it is normal if the buzzer makes sound on high
or low contact points.
- To check the status of contact signal with resistance value, it is normal if the digital
multimeter indicates 0Ω for N.C(Normal Close) and
<HIGH>
Please do not apply impact to the product when movement and transportation.
Turn off the power of the product for maintenance.
In an explosion area, do not disassemble when power is applied.
HITROL CO., LTD.
HM-12(10) Series
<LOW>
(infinity) for N.O(Normal Open).
8