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Omron K3MA-J Series - User Manual

Omron K3MA-J Series
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CSM_K3MA-J_DS_E_11_1
1
Process Meter
K3MA-J
Highly Visible LCD Display with 2-color
(Red and Green) LEDs
• Multi-range DC voltage/current input.
• Front-panel key operation for easy setting.
• Average processing function suppresses flicker.
• Scaling, front-panel forced-zero, zero-limit functions.
• Easy confirmation of max/min display.
• Short 80-mm depth (measured from edge of face plate).
• Finger protective cover (standard equipment) guards against electric
shock.
• Water- and dust-proof NEMA4X (IP66 equivalent) front panel.
• Recognized to U.S. and Canadian requirements under the Compo-
nent Recognition Program of UL.
•CE marking.
Model Number Structure
■ Model Number Legend
1. Input Type
J: DC voltage/current
2. Comparative Output Model
None: No output
A2: 2 relay contact outputs (SPST-NO)
3. Supply Voltage
100-240VAC: 100 to 240 VAC
24VAC/VDC: 24 VAC/VDC
Ordering Information
■ List of Models
* Changing the display color based on comparison with a reference value is not possible.
Refer to Safety Precautions for All Digital Panel
Meters.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
K3MA-J-@
1 2 3
Input type Supply voltage Comparative Output Model Model
DC voltage/current 100 to 240 VAC None * K3MA-J 100-240VAC
2 relay contact outputs (SPST-NO) K3MA-J-A2 100-240VAC
24 VAC/VDC None * K3MA-J 24VAC/VDC
2 relay contact outputs (SPST-NO) K3MA-J-A2 24VAC/VDC

Table of Contents

Questions and Answers

  • L
    Linda RamirezJul 26, 2025
    What to do if the scaling display value exceeds 99999 on Omron K3MA-J Measuring Instruments?
    • A
      Alicia StephensJul 26, 2025
      If the scaling display value exceeds 99999, immediately change the input to a value within the specified range. Also, the scaling value may be inappropriate, so review the scaling value at the initial setting level.
  • T
    tdavisAug 1, 2025
    What to do if the scaling display value is lower than -19999 on Omron K3MA-J Measuring Instruments?
    • T
      tfullerAug 1, 2025
      If the scaling display value is lower than -19999, immediately change the input to a value within the specified range. In addition, the scaling value may be inappropriate, so review the scaling value at the initial setting level.
  • S
    samanthanicholsAug 6, 2025
    What to do if I get an input error on my Omron K3MA-J Measuring Instruments?
    • R
      Robert PerezAug 6, 2025
      If you encounter an input error, promptly change the input voltage/current to a value that falls within the measurement range. If the error persists, repair is necessary. Consult your OMRON sales representative.
  • D
    Denise ZimmermanAug 12, 2025
    How to fix EEPROM memory error on Omron K3MA-J Measuring Instruments?
    • C
      Cheryl KimAug 12, 2025
      If an EEPROM memory error is displayed, press the Level Key for 3 seconds to restore the settings to the factory defaults. If the error persists, repair is necessary. Consult your OMRON sales representative.
  • R
    Robert ZunigaAug 19, 2025
    What to do when turning ON Omron K3MA-J for the first time?
    • T
      travissmithAug 19, 2025
      When turning on the product for the first time, at the initial setting level, set the input type and other parameters according to your application.

Summary

K3 MA-J Product Overview

Key Features and Benefits

Highlights the K3MA-J's highly visible dual-color display, user-friendly operation, and robust design for various applications.

Specifications and Ratings

Electrical and Environmental Ratings

Details electrical and environmental ratings, including supply voltage, power consumption, insulation, dielectric strength, noise, vibration, and shock resistance.

Technical Characteristics

Connections and Wiring

Terminal Arrangement Overview

Input Configuration and Scaling

Scaling Functionality

Explains how to convert input signals to physical values, including setting decimal points for display.

Advanced Functions

Scaling Teach Function

Details the teaching function for setting scaling parameters using actual input values for easier configuration.

Comparative Output Modes

Describes the three output modes: Upper Limit (High Acting), Lower Limit (Low Acting), and Outside Band Acting.

Installation and Wiring

Panel Mounting Procedure

Wiring Precautions and Best Practices

Operating Functions

Comparative Output and System Level Settings

Security Lockouts and Initial Settings

Operation and Level Lockouts

Initial Setup Procedure

Setting Example and Troubleshooting

Error Code Resolution

Provides error codes and their corresponding countermeasures for resolving issues.

Omron K3MA-J Series Specifications

General IconGeneral
Input TypeVoltage, Current, Thermocouple, RTD
Accuracy±0.3% FS ±1 digit
Sampling Period0.5 s
Protection structureFront panel: IP66
Control OutputVoltage
Alarm OutputRelay
MountingPanel mount
CommunicationRS-485
Relay Output250 VAC, 3 A (resistive load)
Power Supply Voltage100 to 240 VAC, 50/60 Hz; 24 VAC, 50/60 Hz; 24 VDC
Humidity35 to 85% RH (non-condensing)

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