NOVKER NK281 for Data Centre Fibre Optic Cable Testing Malaysia

Data centres depend on fibre optic cabling to carry high-speed connections between network racks, equipment rooms, buildings and external telecommunications networks.

A fibre connection may remain active even when its optical loss is higher than expected. Over time, contaminated connectors, damaged patch cords, excessive bending and poor splicing can reduce the available power margin and increase the risk of an unstable connection.

The NOVKER NK281 Stable Light Source, combined with a compatible optical power meter, provides a practical solution for measuring the total end-to-end loss of a data centre fibre link.

Why Fibre-Loss Testing Matters in Data Centres

Data centre fibre links support connections involving:

Core and distribution switches
Storage systems
Server racks
Network cabinets
Meet-me rooms
Main distribution areas
Intermediate distribution areas
Telecom entrance rooms
Building-to-building backbones
CCTV and security networks

High optical loss can lead to:

Reduced link margin
Intermittent communication
Unstable transceiver performance
Increased error rates
Unexpected link failure
Difficulty completing equipment upgrades
Problems when moving to higher network speeds

A proper loss measurement helps verify the condition of the complete optical path before new equipment is commissioned.

What Does the NK281 Test?

The NK281 transmits a stable optical signal from one end of the fibre link.

An optical power meter at the opposite end measures the received signal. By comparing the received level with an established reference, the technician determines the total insertion loss in dB.

The measured loss may include:

Fibre attenuation
Connector loss
Adaptor loss
Fusion-splice loss
Mechanical-splice loss
Patch-panel connections
Cassette and module connections
Excessive bending loss

The NK281 must be paired with a suitable optical power meter. It does not independently calculate the total end-to-end loss.

Single-Mode vs Multimode Data Centre Fibre

Before selecting an NK281 configuration, identify the fibre type used in the data centre.

Single-mode fibre

Single-mode fibre is commonly used for:

Longer-distance connections
Building-to-building links
Campus backbones
Telecom connections
High-capacity network expansion
External carrier circuits

Common testing wavelengths include:

1310nm
1550nm

Multimode fibre

Multimode fibre is frequently found in shorter internal data centre links, depending on the network design and equipment.

Common multimode categories include:

Common testing wavelengths include:

850nm
1300nm

The light source and optical power meter must support the correct wavelengths for the installed fibre.

Not every NK281 configuration contains both single-mode and multimode wavelengths. Confirm the required version before ordering.

When Should Data Centre Fibre Be Tested?

Fibre-loss testing may be performed:

After a new installation
Before equipment commissioning
After fibre splicing
After patch-panel changes
During network migration
Before upgrading transceivers
After rack relocation
During preventive maintenance
After accidental cable disturbance
When troubleshooting intermittent links
Before handing a project over to the customer

Maintaining test records also makes it easier to compare the link’s current condition with its original commissioning result.

How to Test a Data Centre Fibre Link

Identify the correct fibre path

Confirm the source rack, destination rack, patch-panel ports and fibre-core numbers.

Incorrect patching can result in testing the wrong fibre or disconnecting an active service.

Confirm whether the fibre is active

Do not connect a standard light source to a live fibre without first confirming the network condition and approved work procedure.

Use appropriate fibre-identification or live-signal testing equipment where required.

Clean the connectors

Clean every connector involved in the test, including:

NK281 output port
Optical power meter port
Reference patch cords
Patch-panel connections
Fibre adaptors

Connector contamination is a major cause of high loss and unreliable readings.

Establish the reference

Connect the NK281 and optical power meter using suitable reference patch cords. Set both instruments to the same wavelength and establish the reference value.

Connect the installed link

Connect the test equipment at opposite ends of the selected fibre path. Allow the reading to stabilise and record the measured loss.

Repeat at the required wavelengths

For single-mode links, testing may be conducted at 1310nm and 1550nm.

For multimode links, testing may be conducted at 850nm and 1300nm.

Follow the applicable project specification and testing method.

Why Connector Cleaning Is Critical

Data centre fibre connections are frequently disconnected and repatched. Each handling operation creates an opportunity for dust and contamination to reach the connector end face.

Even a small particle can:

Block part of the optical signal
Increase insertion loss
Increase reflectance
Cause unstable measurements
Contaminate the mating connector
Permanently damage the connector surface

Use an inspect-clean-inspect process where suitable inspection equipment is available.

Do not assume that a new patch cord is clean.

Common Causes of Data Centre Fibre Loss

Dirty connectors

This is one of the first conditions to check. Clean both mating connector surfaces before repeating the measurement.

Damaged patch cords

Patch cords may be pulled, crushed, sharply bent or trapped behind network equipment.

Tight bend radius

Fibre routed around sharp cabinet corners or compressed by cable-management covers may produce increased loss.

Too many connection points

Each adaptor, cassette, patch panel and intermediate connection contributes to the total loss budget.

Poor splicing

Backbone links may contain fusion splices that introduce abnormal loss if the fibre was poorly cleaved, contaminated or misaligned.

Incorrect fibre type

Mixing incompatible multimode fibre categories or using unsuitable launch conditions can affect test accuracy and network performance.

Incorrect wavelength

The light source and optical power meter must use matching wavelengths appropriate for the fibre type.

NK281 vs OTDR for Data Centre Testing

The NK281 and an OTDR provide different information.

NK281 with optical power meter

Measures total end-to-end insertion loss
Provides a straightforward dB result
Useful for link acceptance
Suitable for routine loss checks
Requires access to both ends of the fibre

OTDR

Shows events along the fibre
Helps locate high-loss connectors and splices
Measures distance to faults
Provides a graphical trace
Can test from one end, although correct launch and receive fibres may be required

For thorough data centre fibre verification, both methods may be used.

The NK281 confirms overall link performance, while the OTDR helps identify where abnormal loss occurs.

Can NK281 Certify Data Centre Cabling?

The NK281 supplies the optical signal required for loss measurement, but complete certification depends on more than the light source alone.

Formal project certification may require:

Calibrated test equipment
Defined reference method
Suitable multimode launch conditions
Correct test cords
Testing in both directions
Results at specified wavelengths
Length and propagation measurements
Pass/fail limits
Traceable reports
Compliance with the applicable project standard

Before promising formal certification, confirm that the NK281 and the selected power meter satisfy the required testing standard and reporting requirements.

For routine maintenance and comparative loss testing, the NK281 remains a useful field instrument.

RJ45 Testing for Mixed Data Centre Cabling

Data centres and server rooms contain both fibre and copper Ethernet cabling.

The NK281’s additional network-cable functions can support basic checks such as:

RJ45 wire sequence
Open-circuit detection
Short-circuit detection
Network-cable length measurement

This provides extra value to technicians who maintain fibre backbones together with copper connections inside racks and equipment rooms.

However, basic RJ45 testing is not the same as certifying Cat 6, Cat 6A or higher-performance copper cabling. Formal copper certification requires appropriate cable-certification equipment.

Recommended Data Centre Fibre Test Kit

A practical maintenance kit may include:

NOVKER NK281 Stable Light Source
Compatible optical power meter
Single-mode or multimode reference patch cords
Correct SC, FC or LC adaptors
Fibre connector cleaner
Fibre inspection microscope
Visual Fault Locator
Fibre identifier
OTDR
Labelling and test-record materials

The exact equipment depends on whether the work involves installation, preventive maintenance, troubleshooting or formal certification.

Who Should Consider the NK281?

The NOVKER NK281 is suitable for:

Data centre maintenance companies
Structured-cabling contractors
Network installation companies
Facility-management teams
Telecom subcontractors
CCTV and security installers
Factory IT maintenance departments
Building network technicians

Its combined fibre-light-source and basic RJ45 functions are especially helpful for technicians maintaining mixed network infrastructure.

Confirm the Configuration Before Ordering

Before selecting an NK281, confirm:

Single-mode or multimode fibre
Required testing wavelengths
Optical connector types
Output-port configuration
Compatible optical power meter
Required adaptors
Reference patch-cord type
Whether formal test reporting is needed

Choosing the correct wavelength configuration is more important than selecting the instrument based only on its model number.

Contact MTM Precision

Contact us for the NOVKER NK281 Stable Light Source, optical power meters, OTDRs, fibre identifiers and data centre maintenance tools in Malaysia.

MTM Precision Sdn Bhd
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.

Website: www.mtmpre.com.my
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com