283KB

283KB
Read and understand this manual for safely usage.
・ This manual describes the product of standard specification. Read the other manual
for the product of explosion-proof specification.
・ This manual describes the handling, inspection and adjustment of the product which
model is mentioned on cover page. Read and understand this manual before handling.
・ Follow the additional document and/or direction, submitted by NOHKEN INC. and our
distributor or agent, even if the terms are mentioned in this manual.
・ Save this manual in proper place being available to refer immediately.
・ The specification of product mentioned in this manual may not be satisfied by the
condition of environment and usage. Check and consider carefully before using.
・ Contact to sales office at NOHKEN INC. for any question or comment about this
manual and product.
The followings are the description of the terms in this manual.
Indicates a potentially hazardous situation which, if not pay
 WARNING attention, could result in death, serious injury or serious
disaster.
Indicates a hazardous situation which, if not pay attention,
 CAUTION
may result in minor or moderate injury or damage to
device.


Indicates prohibited matter. The explanation with this mark shall
be followed.
Indicates instructed matter. The explanation with this mark shall
be followed.
- ADD 1 -

WARNING
・ This product is not explosion-proof construction. Do not install this

product to the place where the flammable gas or vapor is occurred.
If installed, the flammable gas or vapor may be ignited, and serious
disaster may be occurred. Use the product of explosion-proof
construction in this case.
・ Do not modify or disassemble the product. Otherwise, the product
and connected device may be malfunctioned, damaged, fired, or miner
injury and electric shock may be occurred. ( Follow the additional

document and/or direction, submitted by NOHKEN INC. and our
distributor or agent. )
・ Turn off the power, before wiring and inspection. Otherwise, electric
leakage, fire caused by short circuit, and electric shock may be
occurred.

・ Ensure the wire is properly connected. The product and connected
device may be malfunctioned, damaged, fired, or miner injury and
electric shock may be occurred by improper wiring.
・ Turn off the power immediately, if the smoke, strange smell and
sound are occurred.
Do not use it until the problem is solved.


 CAUTION
・ Avoid strong shock and rough handling to this product. The
product may be damaged by strong shock as dropping, falling, throwing,
knocking, lugging, and etc.
・ Follow the specification of operating temperature, operating pressure,
switch rating, and etc. Otherwise, the product and connected device may
be malfunctioned, damaged, fired, or miner injury and electric shock


may be occurred. Check the manual or specification sheet.
・ Operation test shall be done before practical usage. If the serious
accident is expected to occur by malfunction of product, the other
operating principle of product shall be installed in parallel.
- ADD 2 -

 CAUTION
・ Check and deeply consider the chemical compatibility for material of
product in advance. The part especially float, which is very thin, may be
malfunctioned by miner corrosion.
・ Check and deeply consider the chemical compatibility for material of
product in advance.
・ Hold the stem very close to mounting point, when carrying, installing,
and removing. If hold the terminal box, it may be taken off from the flange
or plug, and the product may be damaged by dropping.
・ The product is 50cm or longer
The product shall be kept in horizontally. The product and other goods
be damaged, and miner injury may be occurred by falling.
・ Earth terminal shall be grounded to JIS Class D ground (earth
resistance less than 100 Ω ). If not grounded, electric shock may occurred
by any accident.





・ Provide arrester or surge absorber to avoid electrical impact such as
lightning and static electricity. If not provide, the product and
connected device May be malfunctioned, damaged, and fired, or miner
injury and electric shock may be occurred.
・ In case of connecting inductive or lamp load to the product.
Provide protective circuit to the load to avoid over voltage and over
current. If not provide, the contact may be damaged.


INTRODUCTION
A) This manual specifies the specification of general product. If you order special product,
some details of specification may be different with the manual.
- ADD 3 -
B) We are glad to suggest and advice for Model selection and chemical resistant of
material, but final decision has to be made by the customer.
C) This manual has prepared with close attention. Ask sales office at NOHKEN INC. for
any question or comment about the contents of this manual.
D) For replacement parts
The quality of product has frequently improved, so same spare part may not be
supplied. In this case, replacement part or product may be supplied. Ask sales office at
NOHKEN INC. for details.
E) The contents of this manual are subject to change any time without notice due to the
improvement of product.
WARRANTY & DISCLAIMER
A) NOHKEN INC. warrants this product against defect in design, material and
workmanship for a period of 1(one) year from the date of original factory shipment.
B) The warranty only covers the damage of products. The secondary and third kind
disasters are not covered by NOHKEN INC.
C) NOHKEN INC. shall not be liable for the following.
C-a) Do not follow the description and direction in this manual.
C-b) Damage due to improper installation, wiring, usage, maintenance, inspection,
storing, and etc.
C-c) Repair and modification are done by the person who is not employee of NOHKEN
INC. and our distributor or agent.
C-d) Improper parts are used and replaced.
C-e) The damage is occurred by the device or machine except our products.
C-f) Improper usage. (See "Proper of usage" in chapter 1 in this manual)
C-g) Force Majeure including, but not limited to, fire, earthquake, tsunami, lightning,
riots, revolution, war, radioactive pollution, acts of God, acts of government or
governmental authorities, compliance with law, regulation, and order.
THE TERMS OF WARRANTY AND DISCLAIMER SHALL IN NO WAY LIMIT YOUR
REGAL LIGHT.
- ADD 4 -
NOTE TO USERS
It is essential for the user to read this manual carefully before installing
the KSV capacitive level sensors to ensure proper operation.
TABLE OF CONTENTS
MUST BE READ BEFORE USING
INTRODUCTION
WARRANTY & DISCLAIMER
NOTE TO USERS
TABLE OF CONTENTS
1. PURPOSE OF USE
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 1
2. STANDARD SPECIFICATIONS ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 1
2.1 Model and Suffix Code ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 1
2.2 Standard Specifications ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 2
3. PRINCIPLE OF OPERATION
4. INSTALLATION
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 2
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 2
4.1 Horizontal Installation ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 2
4.2 Vertical Installation ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 3
5. WIRING
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 3
6. ADJUSTMENT PROCEDURES ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 4
6.1 Sensitivity Adjustment
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 4
6.2 Correction of electrode capacitance ・ ・ ・ ・ Page 6
7. PRECAUTIONS ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 6
8. MAINTENANCE ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 7
9. TROUBLESHOOTING ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Page 7
1.PURPOSE
OF
USE
This is a level sensor utilizing a high ‐ frequency wave. It detects the level
of various types of liquid and powder, and permits detection of the boundary
of two different liquid, the sediment in liquid, and the level in a high
temperature high ‐ pressure vessel, which was impossible in the past.
A special circuit is employed in the amplifier circuit, eliminating
malfunctions and troubles such as adhesion of material to the electrode and
damage in the semiconductors caused by high ‐ pressure static electricity
generated in powder.
The detector inserted into a tank uses no movable part. This structure makes
the unit durable and reliable for a long period of time.
2.STANDARD
SPECIFICATIONS
2.1 Model and Suffix Code
KSV-□ □ □ H
T: with radiator fin
P: with FEP tubing
PT: with FEP tubing and radiator fin
F: Flange mounting
N: Plug mounting
1.Standard type (measuring electrode φ 12)
2.Standard type (measuring electrode φ 20)
3.Pressure-proof type
4.Heat-proof type
5.Flat type
6.Wire type
7.Pipe type
8.Stick-proof type
25.High-sensitivity type
PLB.In-Line concentrically fluid detector
PLT.In-Line insulated fluid detector
NOTES
・ Code - T : Not applied to code 3 and 4.
・ Code - P and - PT : For Flange mounting type only.
・ Code - PLB and -PLT : Not appeared mounting codes.
-1-
4.2 Vertical installation
The problem of adhering to the electrode is less and the operation is
stable. However, as the electrode area ratio is small for a change in
material level, the detection accuracy is lowered and the electrode
size needs to be long for detection of the lower limit of a tank.
Fig. 1
※
Example of installation
In the horizontal installation, we recommend to set the level sensor
obliquely so that the electrode is directed as downward as possible.
This minimizes material stacking on or adhering to the electrode.
※
When a nozzle neck is used, set it so that the earth electrode is
inserted into a tank 20mm or more. This prevents the electrode from
being affected by the material adhered to the tank inside wall or
adhesions.
-3-
5.WIRING
Avoiding faulty wiring (for instance,feeding 200 V AC to the 100 V AC
terminal),connect the input power and output contacts properly according to
the following Fig.2
・ Recommended cable
1.25 mm 2 ,four-core cable
(CVV,CVS or equivalent)
・ Cable inlet:
G 1/2 or equivalent
・ Applicable crimp terminal
R-1.25-3 or equivalent
Fig. 2
6.ADJUSTMENT
PROCEDURES
Fig. 3
6.1 Sensitivity adjustment
6.1.1 Marking sure there is nothing inside, set the sensor on the tank
reserved for measuring.
6.1.2 Ascertain that the power supply is turned on.
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6.1.3 Turning the sensitivity selector switch to the H side actuates high
sensitivity; turning the switch to L actuates low sensitivity.
Turning the sensitivity volume in the direction of 0 on the scale
heightens sensitivity of detection; turning the volume in the
direction of 10 lessens the sensitivity.
Turn the sensitivity selector switch to the H side and turn the
sensitivity volume in the direction of 0 on the scale till the
monitor lamp turns on. Next, turn the volume in the direction of
10 till the monitor lamp turns off. If the monitor lamp acts
abnormally, correct the electrode capacitance according to
chapter 6.2 correction of electrode capacitance.
When the measuring material is available:
6.1.4 With the sensitivity selector switch turning to the L side and the
sensitivity volume turned to 10 on the scale, feed the measuring
material into the tank till the electrode is hidden under the
material.
6.1.5 Sensitivity is properly adjusted if the monitor lamp turns on under
this condition. Otherwise, perform the next step 6.1.6
6.1.6 With the sensitivity selector switch turned to the L side, slowly
turn the sensitivity volume to 0 on the scale untill the monitor
lamp turns on. Note the setting (X). Increase the sensitivity volume
by one division from (X) to (X+1).
If the monitor lamp does not turn on at this stage, turn the
sensitivity selector switch to the H side and then, slowly turn the
sensitivity volume from 10 to 0 untill the monitor lamp turns on.
Note the setting (X). Increase the sensitivity volume by one
division from (X) to (X+1).
6.1.7 Empty the tank and ascertain that the monitor lamp is turned off.
This ends adjustments over sensitivity.
If the monitor lamp remains lit, correct the electrode capacitance
according to chapter 6.2 correction of electrode capacitance and
repeat steps under chapter 6.1 sensitivity adjustment.
-5-
Simplified method of adjustment when the measuring material is not
available:
6.1.8 With the sensitivity selector switch turned to H, turn the
sensitivity volume to 0.
6.1.9 Slowly turn the sensitivity volume to 10 on the scale untill the
monitor lamp turns off. Note the setting (X). Reduce the sensitivity
volume by one division from (X) to (X-1). This ends adjustment over
sensitivity. Follow the above procedure for all subsequent
measurements.
6.2 Correction of electrode capacitance
The electrode capacitance has been corrected at time of delivery but one
or the other of the factors which are outlined in the following
paragraphs might affect adversely the adjustment described under chapter
6.1 sensitivity adjustment
6.2.1 Shape, structure, and/or material of tank.
6.2.2 Floating capacity of electrode mounting on nozzle neck.
6.2.3 Deposits adhering to electrode unit or to inner walls of tank.
6.2.4 Vibration and/or large change in temperature.
In either of the foregoing cases, perform the following steps to
correct electrode capacitance
6.2.5 Without letting the electrode come in contact with the measuring
material, turn the sensitivity selector switch to H side and turn
sensitivity volume to 0 on the scale.
6.2.6 Turn the tuning trimmer and stop it at the position that the
monitor lamp changes from OFF to ON .
6.2.7 Turn the sensitivity volume to 1 on the scale and ascertain that the
monitor lamp turns ON and OFF by turning the volume back and forth
at this position.
6.2.8 Perform the adjustment described under chapter 6.1 sensitivity
adjustment.
7.PRECAUTION
The sensor and the amplifier in each of our level sensor as well as the
sensitivity of detection have been preset to match the capacitance(specific
inductivity) and/or the resistance of the measuring object.
Please consult us if you need to replace any materials.
-6-
8.MAINTENANCE
8.1 All the electrodes in our level sensor have been designed to
automatically compensate for any adhering deposits but these deposits
tend to accumulate in the course of time. In order to prevent
malfunctioning, the sensor should be pulled out at regular intervals
to free the electrode contaminants and keep it clean.
8.2 In case environmental conditions(ambient temperature and humidity,
amongst others) should change to a considerable extent, readjust the
amplifier unit before actual operation in order to avoid
malfunctioning of the level sensor.
9.TROUBLESHOOTING

CAUTION
Use the following chart to troubleshoot the malfunctioning sensor.
If your remedies are unsuccessful, ask Nohken for repair and replacement.
9.1 Relay de-energized when electrode is covered by materials
・ Sensitivity set too low ・・・・・・・・・ Perform adjusts according to chapter
6. ADJUSTMENT PROCEDURES.
・ Material has bridge or angle ・・・・・ Change mounting position with angle of
of repose
repose considered.
・ Improper output connections ・・・・・・ Recheck with reference to Fig.2
connection diagram under chapter
5. WIRING.
9.2 Relay energized when electrode is not covered by materials
・ Tuning is wrong ・・・・・・・・・・・・・・・・・・ Perform adjusts according to chapter
6. ADJUSTMENT PROCEDURES.
・ Sensitivity set too high ・・・・・・・・ Perform adjustments according to
chapter 6. ADJUSTMENT PROCEDURES.
・ Material has dead stock ・・・・・・・・・ Instal level sensor to better position
where generation of dead stock not
possible.
・ Improper output connections ・・・・・・ Recheck wiring with reference to Fig.2
connection diagram under chapter
5.WIRING.
・ Faulty electrode insulation ・・・・・ Trace and remove defect and repeat
adjustments according to chapter
6. ADJUSTMENT PROCEDURES.
-7-
HEAD OFFICE
: 15-29,Hiroshiba-cho,Suita-city,Osaka 564-0052,Japan.
TEL:06-6386-8141
FAX:06-6386-8140
TOKYO BRANCH OFFICE : 67,Kandasakumagashi,Chiyoda-ku,Tokyo 101-0026,Japan.
TEL:03-5835-3311
NAGOYA OFFICE
: 3-10-17,Uchiyama,Chikusa-ku,Nagoya-city,Aichi 464-0075,Japan.
TEL:052-731-5751
KYUSHU OFFICE
FAX:03-5835-3316
FAX:052-731-5780
: 14-1,2-chome,Asano,Kokurakita-ku,Kitakyushu-city,Fukuoka 802-0001,Japan.
TEL:093-521-9830
FAX:093-521-9834
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