KYORITSU KEW 5050 Leak Current Logger System

1. Introduction

The KYORITSU KEW 5050 is a high-performance leak current logger system designed for accurate and efficient measurement of electrical characteristics. This manual provides essential information for the safe and effective use of the device, including setup, operation, maintenance, and specifications.

Figure 1: Front view of the KEW 5050 Logger.

The KEW 5050 features a large graphic display and intuitive controls for easy operation.

2. Safety Warnings

Read all safety instructions carefully before operating the instrument. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Always ensure the instrument is in good working condition before use.
• Do not use the instrument in wet environments or where explosive gases are present.
• Verify that the voltage and current ratings of the circuit being measured do not exceed the instrument's specifications.
• Use only specified accessories and replacement parts.
• Never attempt to open or modify the instrument. Refer all servicing to qualified personnel.

3. Key Features

• Provides simultaneous measurements and logs up to 4 channels.
• Supports various wiring systems.
• World's fastest class speed at 200ms interval for leakage current measurement.
• Offers both traditional leakage / load current measurements.
• Large graphic display and magnet on the back case to attach it on metal enclosures.
• Bluetooth communication for IoT applications.

Figure 2: KEW 5050 with clamp sensors for leakage current measurement.

The logger supports various clamp sensor sizes for diverse applications.

4. Package Contents

Verify that all items listed below are included in your package:

• KEW 5050 Main Unit
• Test Leads (Model 7273)
• AC Adapter (Model 8262)
• Earth Cable (Model 7278)
• USB Cable (Model 7219)
• SD Card (2GB) (Model 8126)
• Carrying Case (Model 9125)
• Instruction Manual
• Cable Marker
• LR6 (AA) Batteries x 6
• KEW Windows Software CD

Figure 3: KEW 5050 and its included accessories.

Ensure all components are present and undamaged upon unboxing.

5. Initial Setup

5.1. Battery Installation

1. Open the battery compartment cover on the back of the unit.
2. Insert 6 LR6 (AA) batteries, ensuring correct polarity.
3. Close the battery compartment cover securely.

5.2. SD Card Insertion

1. Locate the SD card slot on the side of the unit.
2. Insert the provided 2GB SD card until it clicks into place.
3. To remove, push the card gently until it ejects.

Figure 4: Side view with input terminals and SD card/USB access.

The SD card slot and USB terminal are located under a protective cover.

5.3. Connecting Clamp Sensors and Test Leads

1. Connect the clamp sensors to the designated current input terminals (A1-A4).
2. Connect the voltage test leads to the voltage input terminals (V, L, N).
3. Ensure all connections are firm and secure before proceeding with measurements.

6. Operating Instructions

6.1. Power On/Off

Press and hold the POWER button to turn the unit on or off.

6.2. Measurement Modes

The KEW 5050 can measure various electrical parameters:

• Io: Leakage current (1st-order component of Iom)
• Ior: Resistive leakage current
• Iom: Leakage current with harmonics
• R: Insulation resistance (determined by V and Ior)
• V: Reference voltage (1st-order component of Vm)
• f: Frequency

Use the navigation buttons (UP/DOWN/LEFT/RIGHT) and ENTER button to select and configure measurement parameters.

Figure 5: KEW 5050 display modes and measurement principles.

The device offers various display modes and advanced measurement techniques like FFT.

6.3. Data Logging

To start logging data, press the START/STOP button. Press it again to stop logging. Logged data is saved to the SD card.

6.4. Data Transfer and Analysis

Connect the KEW 5050 to a PC using the USB cable. Use the KEW Windows software to download, view, and analyze the logged data. The software supports automatic generation of graphs and reports.

Figure 6: KEW 5050 in an operational environment.

The device can be used with Bluetooth for remote monitoring and IoT applications.

7. Maintenance

7.1. Cleaning

Wipe the instrument with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the device.

7.2. Battery Replacement

Replace batteries when the low battery indicator appears on the display. Use only new LR6 (AA) alkaline batteries. Remove batteries if the unit will not be used for an extended period.

7.3. Calibration

For optimal accuracy, periodic calibration by authorized service centers is recommended. Refer to the warranty information for details on recommended calibration intervals.

8. Troubleshooting

If the problem persists after attempting these solutions, contact KYORITSU customer support.

9. Specifications

For a complete list of specifications, refer to the detailed specification sheet provided with your product or on the manufacturer's website.

10. Warranty and Support

The KYORITSU KEW 5050 comes with a manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions, including warranty period and coverage details.

For technical support, service, or inquiries regarding your product, please contact KYORITSU customer service through their official website or the contact information provided in your warranty documentation.