KYOWA PDU-A Instruction Manual

PDU-A Differen tial Pressu re Tran sd u cer INSTRUCTION MANUAL
Thank you for purchasing this KYOWA product. Before using it,
read this instruction manual carefully. Also, keep the manual
within easy reach so that you can refer to whenever necessary.
Specifications and dimensions described in this manual could be
changed without notice. Please visit our website for the latest
version.
1. Callin g th e o p erato r's atten tion
The following cautionary symbols and headlines are used to invite
the operator' s attention. Be sure to observe the accompanying
precautions in order to safeguard the operator and preserve the
performance of the instrument.
Improper handling may cause serious injury to
W arn in g
the operator.
Improper handling may cause deleterious
Cau tio n
effects to the operator's body.
Cautions are given to invite the operator' s
Cau tion
attention, in order to avoid instrument failure
or mal- function.
2. Im p o rtant n otice
Unless specified, the transducers must not be used under
hydrogen environment.
3. Safety p recau tio n s
Avoid pressure in excess of the allowable overload rating, or the
instrument can explode.
Avoid contact of a projecting object with the sensing surface, or
the latter may crack to result in the transducer' s explosion.
Use the specified tightening torque. Improper tightening torque
may cause the transducer' s explosion.
If excessive pressure could possibly occur, provide protective
casing around the transducer installation, in order to safeguard
the operator.
Dismount the transducer only after the applied pressure has
been completely removed.
SUS316L and SUS304 (JIS G4303) is used where the
transducer contacts a liquid. Avoid application of the transducer
to a corrosive liquid or gas.
W arnin g
Cau tio n
4. Han d lin g precau tio n s
Cau tio n
Do not disassemble the transducer.
Avoid tension on the cable.
Make sure that the bending radius of cable is longer than 6
times of a diameter of the cable.
Materials used are: SUS316L for diaphragm and flange;
SUS304 for air escape; fluoro rubber for O- ring.
Do NOT use the transducer with any chemical listed below.
1. Halide 2. Hydrochloric acid 3.Formic acid 4. Oxalic acid
5. Hydrogen sulfide 6. Absolute ammonia 7.Caustic soda
8. Acetone 9. Acetic acid 10. Nitrous acid 11. Sulfuric acid
The transducer' s mainframe is connected with the shielding
wire of the cable.
Use the transducer as it is in ordinary cases. However if it is
necessary to disconnect the shielding wire, remove the
mounting plate and disconnect the shielding jumper wire
inside the terminal box.
The transducer is provided with overload protection which
prevents damage in case of an overload (up to 30MPa) on
either the high or low pressure side. The zero point is however
caused to drift more or less. If such is the case, take zero
balance anew.
Use line pressure of less than 30MPa
Use bridge voltage of lower than 15V.
To use the transducer as a pressure transducer, use the high
pressure inlet.
Avoid damage to the diaphragm when cleaning or removing
foreign matters from it.
To mount the flange to the mainframe, tighten the bolt using
torque of 40N ･ m (reference value: 400kgf ･ cm).
IM-T-114G J ul 2022
.