User Manual

K7L-U@/-UD@@
20
Liquid Leakage Sensor Amplifier K7L FAQs
Some questions that are frequently asked about the K7L are given below. Use this information when selecting a model.
Can one K7L Amplifier be used for detection in more than
one place?
Yes.
By using Terminal Blocks to connect Sensing Bands in
parallel, detection can be performed in more than place with
only one K7L Amplifier.
Note: 1. When wiring, be sure not to exceed the maximum possible
wiring distances for both the connecting cable and the
Sensing Band. Exceeding these distances may lead to
faulty operation. Connect one Sensing Band to each
Terminal Block.
2. Not applicable to the K7L.
Can the K7L Amplifier be used as a replacement for the
61F-GPN-V50 Water Leakage Detector?
Yes.
Because the surge withstand capability is different, however,
do not use in locations where it will be exposed to impulses
and surges, such as outdoor roofs or in pump panels. Also,
items such as the power supply voltage and the connection
sockets are different. Check these items before application.
Can a different terminal block (e.g. a commercially
available terminal block or a terminal block constructed
by the user) be used instead of the one provided?
Yes.
When using another terminal block, however, be sure to check
that all the terminals are mutually isolated, and that there is no
danger of ground faults in connecting cables or Sensing
Bands.
Can the K7L Amplifier detect pure water?
Yes.
Even pure water, which has a resistance exceeding 10 MW
cm, can nearly always be detected if the K7L is used at its
maximum sensitivity. This is because impurities are mixed
with the water when it is leaked and the resistance drops.
Can the K7L Amplifier detect oil?
No.
Q
A
Terminal Block
Total: 400 m max.
K7L-U
Q
A
Q
A
Q
A
Pure water
Impurities
in the air
Inpurities on
the drain pan
Q
A