Secondhand Nihon Kohden EEG-9200-SFF EEG Isolation Unit

Objective AI Report

Disclaimer: I am Medbidding AI. I am an unbiased AI robot. I have generated the following report automatically (without human intervention). The report was prepared by examining only the product images in the ad in detail. The report may contain errors. Medbidding and other parties disclaim any liability that may arise from this report or reliance on its contents. If you have any questions or notice an error in the report, please contact Medbidding engineers.

Report date: 16.01.2026

Nihon Kohden Isolation Unit and Fluke Multimeter Analysis Report

1. Device Identification and Product Description

The analyzed images feature two primary devices: one being a medical power supply/isolation transformer unit, and the other a digital multimeter used for measurements. The first device is a desktop-type, metal-cased system component manufactured to industrial/medical standards. The second device is a portable test instrument used for measuring electrical parameters.

2. Brand and Model Information

The brand and model information for the devices in the images can be clearly read from the labels on the products:

• Main Device (Power Unit): Based on the logo on the product’s rear panel, the brand is NIHON KOHDEN. The label on the side panel clearly shows “Model: EEG-9200-SFF“. This coding confirms that the device is a power or isolation unit belonging to an EEG (Electroencephalography) system.
• Measurement Device (Multimeter): Based on its yellow protective casing and the text on the screen, the brand is FLUKE. The model information is stated as “17B+ DIGITAL MULTIMETER” directly above the screen.

3. Technical Label Data and Serial Numbers

The technical labels and warnings found on the NIHON KOHDEN branded device are as follows:

• Serial Number (S/N): 10442
• Output Value (Output): The phrase “OUTPUT AC117V TOTAL 750VA MAX.” indicates that the device provides a 117 Volt AC output and supports a maximum power of 750 Volt-Amperes.
• Breaker: On the front panel, there is a green illuminated power switch under the inscription “BREAKER 10A”.
• Warning Label: “CAUTION: United States law restricts this device to sale by or on the order of a physician.” (Standard FDA medical device warning indicating that US law restricts the sale of this device by or on the order of a physician).

4. Physical Condition and Cosmetic Examination

The physical conditions of the devices based on the images are as follows:

• Metal Casing (Nihon Kohden): The device’s gray metal casing shows noticeable scratches, scuff marks, and paint deformations, particularly on the top surface. These marks on the metal surface indicate that the device has been actively used and moved around in a rack environment. While the side and rear panels appear relatively cleaner, the overall condition is “used”.
• Multimeter (Fluke): There is a gelatin (protective film) on the multimeter’s screen, but this film is peeling and worn. No tears or significant stains are visible on the yellow rubber casing.
• Cables and Connections: A black power cable is connected to the back of the power unit (in the AC Source input). The multimeter’s test probes are inserted into one of the output sockets. No breaks or burn marks are visible around the sockets.

5. Electronic and Functional Analysis

The measurement moment in the image provides important data regarding the device’s operational status:

• Voltage Test: The FLUKE multimeter is operating in AC Voltage mode (V~). The multimeter probes are in contact with the NIHON KOHDEN unit’s rear output sockets.
• Screen Reading: A value of 103.2 is read on the multimeter screen. Although the device’s nominal output value is stated as 117V, the measured 103.2 Volt value proves that the device is transmitting electricity and providing an output (Note: This value may be within tolerance due to grid fluctuations or load conditions, but it confirms an active output).
• Power Switch: The green “BREAKER” switch on the front panel is in the “I” (On) position. Although it is not clearly discernible whether the switch’s light is on due to ambient lighting, the measurement result indicates that the device is powered.

6. Accessories and Connection Elements

The following accessories accompanying the devices have been identified in the images:

• 1 standard Black AC Power Cable (connected to the Nihon Kohden device).
• 1 pair of Multimeter Test Probes (Red and Black leads, connected to the Fluke device).
• It is observed that one of the AC outlet sockets (white square sockets) on the device has an unused protective cover or a similar label-like structure, while the other two are open.

7. Areas of Use and Compatibility

NIHON KOHDEN EEG-9200-SFF: This device is used in medical environments to isolate sensitive electronic devices (especially EEG brain activity measurement systems) from grid noise and to provide voltage regulation. The output voltage of 117V indicates compliance with American standards or specific medical device voltage requirements.

FLUKE 17B+: It is a professional measuring instrument used in general electrical/electronic maintenance and repair work for voltage, current, and resistance measurements.

8. Conclusion

The examined NIHON KOHDEN EEG-9200-SFF unit, while having cosmetic wear (scratches) physically, is an original device with its integrity intact. The test image shows it providing a 103.2 Volt output with the multimeter, indicating that the transformer is transmitting electricity and is not open-circuited. As the device is a medical isolation transformer, it is intended for use in the power infrastructure of professional medical systems.