Komshine KPM-11M Fiber Optic Mini Power Meter User Manual

1. Introduction

The Komshine KPM-11M is a compact and versatile fiber optic mini power meter designed for accurate measurement of optical power in various fiber optic applications. It features a built-in LED light for operation in dark environments, supports 7 standard wavelengths, and offers user self-calibration for precise measurements. Its pocket-sized design and universal adapter compatibility make it an essential tool for fiber optic technicians.

Front view of the Komshine KPM-11M Optical Power Meter, highlighting its compact size, LED light, and ±0.2dB accuracy.

2. Product Features

High Accuracy: Measurement error less than ±0.2dB.
Integrated LED Light: For easy operation in low-light conditions.
Long Battery Life: Up to 20 hours of continuous use (power meter function only).
Multiple Wavelengths: Supports 7 standard wavelengths (850/980/1300/1310/1490/1550/1625nm).
Compact and Portable: Pocket-sized design with a back clip for easy carrying.
USB Charging: Built-in Lithium Battery with convenient USB charging.
Universal Connector: 2.5mm universal interface compatible with SC, FC, and ST connectors. Optional 1.25mm LC adapter available.
Measurement Range: Available in two versions: -70~+10dBm and -50~+26dBm.
User Self-Calibration: Allows manual adjustment of values for flexible and accurate measurements.

Infographic summarizing key product features of the KPM-11M — Infographic summarizing key product features: Mini Compact, 2.5mm universal connector, 0.2dB accuracy, 7 wavelengths, automatic calibration, and LED light.

3. Setup

3.1 Charging the Device

The KPM-11M features a built-in Lithium battery and supports USB charging. Connect the device to a standard USB power source (e.g., wall adapter, power bank, computer USB port) using a compatible USB cable. The charging indicator on the device will show its status.

Illustration of the KPM-11M being charged via USB — The KPM-11M can be charged via USB from various sources, including a socket, power bank, or computer USB port.

3.2 Attaching Fiber Optic Connectors

The KPM-11M comes with a 2.5mm universal interface, compatible with SC, FC, and ST connectors. An optional 1.25mm LC adapter is also available for LC connections.

Ensure the fiber optic connector and the power meter's port are clean. Use appropriate fiber cleaning tools if necessary.
Carefully insert the fiber optic connector (SC, FC, ST, or LC with adapter) into the optical port at the top of the KPM-11M until it is securely seated.

Close-up of a 1.25mm LC adapter — A 1.25mm LC adapter, suitable for use with the KPM-11M.

Detailed view of an LC adapter connected to a fiber optic cable — Example of an LC adapter connected to a fiber optic cable, ready for insertion into the power meter.

4. Operating Instructions

4.1 Power On/Off

Press the green power button (ON/OFF) to turn the device on. Press and hold the red power button to turn it off.

4.2 Wavelength Selection

The KPM-11M supports 7 standard wavelengths. To switch between wavelengths, press the 'lambda' button (λ). The selected wavelength will be displayed on the screen.

Display of the KPM-11M showing 7 optional wavelengths — The KPM-11M display showing the 7 optional wavelengths (850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm) and indicating the 'lambda' button for switching.

4.3 Optical Power Measurement

Power on the device.
Select the desired wavelength using the 'lambda' button.
Connect the fiber optic cable to the optical port.
The measured optical power (in dBm) will be displayed on the screen.

The KPM-11M displaying an optical power measurement, demonstrating its precision with an error less than 0.1dB.

4.4 LED Light Operation

To activate the built-in LED light, press the dedicated LED light button (often integrated with the power button or a separate button with a light icon). This feature is useful for working in dimly lit environments.

Close-up view of the KPM-11M's integrated LED light, illuminating a dark environment for operation.

4.5 User Self-Calibration

The KPM-11M allows users to manually calibrate the device for optimal accuracy:

Press and hold both the green power button and the 'REF/dB' button simultaneously until "REF" appears on the screen, indicating entry into calibration mode.
Use the 'REF/dB' button to decrease the reference value and the 'lambda' button to increase it.
Once the desired calibration value is set, press the LED Light button to save the values and exit the calibration procedure.

Diagram detailing the user self-calibration process for the KPM-11M, showing the combination of 'REF/dB' and 'LED Light' buttons for adjustment and saving.

5. Maintenance

5.1 Cleaning the Optical Connector

Regular cleaning of the optical connector interface is crucial for accurate measurements and to prevent damage to the device. Use only approved fiber optic cleaning tools and methods. Never use abrasive materials or solvents that could damage the optical components.

5.2 Battery Care

To prolong battery life, avoid fully discharging the device frequently. Charge the device regularly, especially if it will be stored for an extended period. Store the device in a cool, dry place.

5.3 General Care

Keep the device free from dust, dirt, and moisture. Avoid dropping the device or subjecting it to strong impacts. When not in use, store the device in its protective casing.

6. Troubleshooting

6.1 Inaccurate Readings

Dirty Connectors: Ensure all fiber optic connectors and the power meter's input port are clean.
Incorrect Wavelength: Verify that the correct wavelength is selected on the device for the fiber being tested.
Calibration Issue: Perform a user self-calibration as described in Section 4.5.
Damaged Fiber: Inspect the fiber optic cable for any physical damage.

6.2 Device Not Powering On

Low Battery: Connect the device to a USB charger and allow it to charge for some time before attempting to power it on again.
Faulty Cable/Charger: Try using a different USB cable and charger to rule out external issues.

6.3 LED Light Not Working

Low Battery: The LED light may not function if the battery is critically low. Charge the device.
Device Malfunction: If charging does not resolve the issue, contact support.

7. Specifications

Parameter	Specification
Model	KPM-11M
Wavelength Range	800 ~ 1700 nm
Probe Type	InGaAs
Optical Connector	2.5mm universal interface (1.25mm LC optional)
Measurement Range	-50 ~ +26 dBm / -70 ~ +10 dBm
Uncertainty	< 0.2 dB
Standard Wavelengths	850, 980, 1300, 1310, 1490, 1550, 1625 nm
Resolution	0.01 dB
Automatic Shutdown Time	10 min
Power Working Time	20h (power meter function only)
LED Light	Available
Size / Weight	127 x 36.5 x 28 mm / 61g (includes battery)

8. User Tips

Versatile Use: The KPM-11M is suitable for various applications including general handheld optical power measurement, light source testing, and visual fault locator (VFL) support.
Portability: Utilize the back clip design to easily carry the device on your belt or pocket for convenient access during fieldwork.
Dark Environments: Always remember to use the built-in LED light when working in poorly lit areas to improve visibility and accuracy.
Regular Calibration: For critical measurements, perform a user self-calibration periodically to ensure the highest accuracy.

KPM-11M power meter with a back clip design — The KPM-11M power meter features a back clip design for easy portability.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided at the point of purchase or contact your vendor. Keep your purchase receipt as proof of purchase.

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Komshine KPM-11M