Cat. No. N106-E1-1
K3MA Series
Digital Panel Meter
USER MANUAL
PREFACE
This User’s Manual provides you with information necessary.
For use of the K3MA series of digital panel meters.
Please read this manual carefully to ensure correct and efficient use of the product.
Keep this manual handy for future reference.
GENERAL PRECAUTIONS
If contemplating using the product in the following environments or for the following equipment, first
contact a sales representative of the company and then accept responsibility for incorporating into the
design fail-safe operation, redundancy, and other appropriate measures for ensuring reliability and
safety of the equipment and the overall system.
(1) Environments deviating from those specified in this manual
(2) Nuclear power control system, traffic (rail car/automobile/aircraft) control system, medical
equipment, amusement equipment, and rescue and security equipment
(3) Other equipment that demands high reliability, including those related to the safety of life and
property
About the Content of the Manual
(1) Any reproduction, full or in part, of the manual is prohibited without prior written
permission from the company.
(2) Descriptions in the manual may be subject to change without notice.
(3) Information in the manual has been carefully checked for accuracy. If finding any
suspicious or erroneous descriptions in the manual, however, you are kindly requested
to contact a branch office of the company. In such a case, please let us know the Cat.
No. shown on the front cover of the manual.
I
SAFETY PRECAUTIONS
!
Signal Words
In this manual, safety notices are divided into WARNING and CAUTION according to the hazard level.
As both of WARNING and CAUTION notices contain important information for ensuring safety, be
sure to observe them.
A signal word indicating a potentially hazardous situation
which, if not avoided, may result in death or serious injury.
A signal word indicating a potentially hazardous situation,
if not avoided, may result in minor or moderate injury or
property damage.
!
Warnings
Do not touch live terminals of the product.
Doing so may result in electrical shock.
Do not disassemble or touch the inside when the power is tuned on.
Doing so may result in electrical shock.
Do not allow pieces of metal or wire clippings to enter the product.
Doing so may result in electrical shock, fire, or malfunction.
Perform correct setting of the product according to the application. Failure to do so may cause unex-
pected operation of the overall system, resulting in damage to the system or personal injury.
Take appropriate safety measures in case the product malfunctions.
Otherwise, a serious accident could occur if a malfunction of the product prevents comparative out-
put from being generated.
II
NOTICE
!
Observe the following precautions to ensure safety.
(1) Maintain the power supply voltage within specifications.
(2) Use the product within the rated load.
(3) Be sure to check each terminal for correct number and polarity before connection.
Incorrect or reverse connection may damage or burn out internal components of the product.
(4) Be sure to tighten the terminal screws.
Recommended tightening torque: 0.43-0.58 N·m
Loose screws may result in product failure or malfunction.
(5) Do not connect anything to unused terminals.
(6) Install a switch or a circuit breaker so that the operator can turn off the power supply without delay
and attach an appropriate label.
(7) Do not disassemble, repair, or modify the product.
(8) Do not use the product in flammable or explosive atmosphere.
!
For proper usage of the product:
(1) Do not use the product in such an environment that is subject to the following:
• Direct heat radiation from any heat source
• Water flooding or oil splashes
• Direct sunlight
• Dust or corrosive gases (especially, sulfuric or ammonia gas)
• Rapid temperature changes
• Condensation or icing due to high humidity
• Strong vibration or mechanical shock
(2) Do not block heat dissipation from the product, i.e., allow sufficient space for heat dissipation.
(3) Be sure that the rated voltage is reached within 2 seconds after the power is turned ON.
(4) Conduct aging for at least 15 minutes after turning ON the power for correct measurement.
(For K3MA-L: 30 minutes)
(5) To prevent the effect of static electricity, do not touch live terminals or slit areas of the product.
(6) Do not apply heavy load to the product. Doing so may deform or deteriorate the product.
(7) Do not use paint thinner for cleaning. Use commercially available alcohol.
!
Installation and connection
(1) Mount the product to a panel that is 1 to 8 mm thick.
(2) Install the product in a horizontal position.
(3) Use crimp-style terminals fit for the screw size.
III
!
Noise prevention
(1) Install the product as far as possible from devices that generate strong high-frequency fields (such
as high-frequency welders or sewing machines) or surges.
(2) Attach surge absorbers or noise filters to nearby devices that generate noise (particularly, motors,
transformers, solenoids, magnet coils, and other devices that have a high inductance component).
However, in the case of K3MA-L, do not connect the surge absorber to the input unit for
temperature sensors.
(3) To prevent inductive noise, separate the terminal block wiring for the product from high-voltage or
high-current power lines. Do not route the wiring for the product in parallel with or tie it in a
bundle with power lines.
Use of separate wiring ducts or shielded cables will also be effective for noise prevention.
<Examples of noise prevention schemes>
(4) When using a power supply noise filter, check that the filter is suitable for the supply voltage and
current ratings and then install it as close as possible to the product.
(5) Televisions, radios, or other wireless devices may cause reception interference if placed near the
product.
IV
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