Instruction Manual For Chemical-resistance Pressure ...

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TY-KL92-001A 1/4
April 2005
TY-KL92-001A 2/4
April 2005
KL92 Chemical-Resistance
Pressure Transmitter
Instruction Manual
Thank you for selecting the KL92 Chemical-Resistance
Pressure Transmitter. In order to fully utilize this machine,
please read this instruction manual to the end.
1. Do not apply more than the maximum allowable pressure.
Human injury or damage to surroundings may result due to
burst or blow-up of the pressure elements.
2. Do not use these devices on measured objects which are
corrosive to fluid or gas contacting areas.
Human injury or damage to surroundings may result due to
burst or blow-up of the pressure elements and exposure of
dangerous measured objects.
3. Do not apply excessive weight, vibration or shock.
Human injury or damage to surroundings may result due to
burst or blow-up of these devices and exposure of dangerous
measured objects.
4. Use with the unspecified power supply may cause fire hazard
or electric shock.
5. Use with the instrument temperature range.
Use outside the instrument temperature range may cause
human injury or damage to surroundings due to burst or
blow-up of the devices.
6. Connect wiring accurately according to the wiring drawings
or instructions in the operation manual.
Incorrect wiring may result in human injury or fire hazard.
7. Use devices with an explosion-proof construction when
operating in places liable to have explosive gas, or otherwise
runs the danger of explosion.
8. If the measured object is oxygen, use devices with anti-oil
Standard devices may possibly contain remaining oil, and
there is danger of combustion and explosion if oil reacts with
9. Accurately install these devices according to the installation
instructions in the operation manual.
10. Never attempt to neither reconstruct the main body of
devices nor add any new function to the devices, etc. Contact
us for repairs.
11. For applications where a failure, a malfunction or other
defect of this product might result in a serious damage,
accident, etc., use multiple units of this product and configure
protective circuits [1 out of 2], [2×(1 out of 2)], [2 out of 3]
etc. according to their importance.
Note: Please contact NKS in advance when using these products
may possibly result in a fatal or a serious injury due to
malfunction or incorrect operation of these products.
Check the specifications of the product on receiving it. A
problem will occur if the range, power source, output or other
specifications of the unit are different from your operating
conditions. Use a model of the specifications that suit your
operating conditions.
This product is an electrical capacitance pressure transmitter
using a ceramic diaphragm in the pressure-detecting element.
Wetted parts are made of all fluorocarbon resin and employ
O-ring-free structure, which is devised as to minimize the
generation of contaminant and the elution of metal.
The contents of these instructions are subject to change without
notice. In the event of a problem please contact the closest
Nagano Keiki sales office.
OVERSEAS TELEPHONE :03 (3776) 5328
SALES DEPT FAX :03 (3776) 5447
Pressure range
Allowable maximum pressure
Fluid Any Liquid compatible with PFA and PTFE
Pressure connectiion
Material of wetted parts
Output signal 4~20mA DC 1~5V DC
Supply voltage 24V DC±10% 12~24V DC
Load resistance 500Ω max. 10kΩ min.
Operating temperature range
Fluid temperature range
Storage temperature range
Operating humidity range
Insulation resistance
Material of case
Temperature coefficient
0~0.3MPa , 0~0.5MPa
1/4"DIA, 3/8"DIA, 1/2"DIA
140g approx. (include cable)
±0.05%F.S./℃(zero point)
100MΩ or more(500V DC)
TY-KL92-001A 3/4
Outside dimensions diagram
To prevent the product from malfunctioning or deteriorating,
be sure to avoid installing it in the following places:
•Places where temperature is high
•Places where temperature is low
•Places where corrosive or volatile gas is involved
•Places where strong vibration occurs
•Places where high noise exists
•Places where thunder is likely to hit
•Places that are splashed with liquid or submerged
•Mounting position where the process connection faces
vertically upward
This is a precision instrument. The unit may become
inoperable when it is dropped or given shocks. Transport the
unit very carefully.
Store the unit in a dry and a vibration – free and dust – free
Sensor operation
This instrument comprises a diaphragm of fluorocarbon resin
that receives pressure, a pressure transmitting mechanism that
transmits force, a diaphragm made of ceramics, a sensor
consisting of an electrode formed on the ceramic diaphragm and
another fixed electrode formed a certain distance separated from
said electrode, and a circuit that detects the capacitance of the
When the pressure of object substance acts on the diaphragm
of fluorocarbon resin, it is transmitted as a force to the ceramic
diaphragm, which is displaced in proportion to the force. This
displacement is detected as a change in the capacitance of the
sensor by the electrical circuit to be transmitted as DC voltage
and current output.
Wiring Diagram
*When connecting equipment that causes surge, etc., from the
same power source, a varistor or the like should be connected to
protect the transmitter.
3wire type
2wire type
TY-KL92-001A 4/4
After checking connection, turn the power on. When pressure
is zero (atmospheric pressure), the reference value of 1 V DC
must be output with three wire system; 4 mA DC with two wire
system. If the output value at atmospheric pressure is shifted
from these values, zero adjustment is necessary. Remove the cap,
and you will find a variable resistor for zero point adjustment.
Turn it with a standard screwdriver to adjust the output value to
1 V DC or 4 mA DC. Then, voltage or current value will be
output in proportion to the pressure acting on the sensor. Should
any abnormality be recognized, contact Nagano Keiki Co., Ltd.
In general, according to the using condition, conduct a
periodical inspection about twice a year. Should any abnormality
be recognized, contact Nagano Keiki Co., Ltd.
Check Items:
・Visual inspection
・Pressure inlet for corrosion, dirt, clogging, leak, etc.
・Check the output with a standard pressure gauge.
Measures against Noise
Noise problems in many cases are too complicate to be solved
easily, and noise can affect a smooth operation. Sometimes the
measured value may fluctuate or result in different values
because of the noise.
In principle, if the power line is mixed with a noise, check the
noise source for taking the preventive step. If a noise occurs
regularly, insert a filter for one of the remedial measures. It is
also important to connect to the power source other than the one
mixed with the noise.
Noise can also come into the signal line from outside
induction. For the prevention, move the noise source away,
change the direction, apply a magnetic shield, electrostatic
shield, etc.
CE Marking
This instrument is approved for CE marking under the
following conditions:
Conforming directive: 89/336/EEC
Conforming standard: EN61326: 1997, A1: 1998,
A2: 2001 (EMI Class B/EMS Annex A)
In addition, this instrument is approved for CE marking on
condition that it is used in the environment electrically protected
against lightning surge. (EN61000-4-5: 1995, Annex B, B. 3,
Class0) Therefore, this instrument must not be used in
environments where there is an anxiety of lightning surge. Do
not use this instrument for security applications.
When chemical is used as the object fluid to measure, use this
instrument in the range that the chemical does not corrode or
permeate the material of the wetted part of the sensor. In
addition, the service life when used with chemicals greatly
depends on the working conditions, including the concentration
of chemical, temperature and pressure. Especially when this
instrument is to be used with strong acid or strong alkali, consult
Nagano Keiki Co., Ltd. Resistance data against individual
chemical requires a separate test. Sufficiently execute
confirmation test under actual operating conditions before use.
This instruction manual is not intended to be complete in
every detail of the equipment or to cover all the variants. It is
neither intended to provide for all necessary ancillary items
regarding installation and maintenance.
Contact us when further details are required, or you are not
fully satisfied with the above instructions.

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