For many years Electricity, Water, Oil and Gas Utilities as well as Transport companies have required bespoke, robust, dedicated network critical infrastructure solutions with high availability and reliability. Historically, these tended to use bespoke well-proven technologies aimed at providing key functionality and high availability, with redundancy, protection and long service life favoured over ‘cutting-edge’ performance. These aspects are still important, but the drive towards modern, efficient and interconnected operations, has resulted in the adoption of mainstream Internet functionality and movement from TDM to IP technologies.
In the past, the very nature of the deployed bespoke systems has meant that security issues didn’t arise, since wider threats didn’t apply. A case of being safe by being unknown. But with the adoption of Internet technologies, along with the growth and increasing sophistication of cyber-threats, Utilities and other private network companies are needing to apply Information Technology (IT) security solutions tailored to their Operational Technology (OT) systems.
@YellowsBestLtd seeks Solutions and provides Services to support Customer requirements to maintain and keep operational critical infrastructure networks. Please get in touch to discuss how we can be of assistance.
Continued Supply of Spare Parts – Surplus and Refurbished Items
@YellowsBestLtd satisfies customer product sourcing requirements for current and ‘legacy’ equipment technologies.
Despite the recent ‘rampdown’ announcement by DNWP for the ‘Dynanet’ range, we should be able to continue to supply refurbished and surplus equipment for as long as required, but the likely effect of the discontinuation of production will be to squeeze the availability of remaining stocks, with a consequential impact on pricing.
Hence, it is recommended that if there is anything that might be needed, it would be best to consider purchasing it in good time to ensure availability of items and best prices.
Here is a list of the main items immediately available from current stocks, though there may be a few additional parts that can be supplied. Hence, please check and if you do have any requirements, please let us know. We look forward to hearing from you.
Part Number
Description
24204
TPSO H/W Module
CC 24002
DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011
DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24101
DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
CC 24111
DN2 Control Unit (CU) 75 ohm
CF 24186
DN2 19″ Subrack
CF 24186.09
DN2 Subrack 19″, grey-L91 EMC
CG 24170
DN2 Bus Power Unit (BPU)
CG 24171
Extended DN2 Bus Power Unit (EBPU)
CU 24013
Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
T30506.09
17-slot DYNANET Subrack
T30851.02
Subrack Power Adapter (SPA)
T37870.01
NDM ACM2 19in 17-slot subrack
T37871.01
NDM DN2 19″ 17-Slot Subrack
T37882.01
NDM DC Unit (NDUe)
T37882.02
NDM DC Unit (NDUe)
T37885.01
NDM Ring Generator
Ring Generator – T37885.01
Part Number
Description
T37889.01
NDM Backup Unit (NBU)
NDM Backup Unit – T37889.01
Part Number
Description
T65520.01
ACL2 RM DC Power Gen
T65580.01
ACL2i PF GEN Line Terminal Card
ACL2i PF GEN – T65580
Part Number
Description
TA 21513
Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516
Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21101
DM34 Mux Card
TC 21301
DM8 Multiplex Equipment, 75 ohm
TC 21705
Supervisory Substation
TC 21710.01
TMS Adapter
TG 21261
Ring Generator 25HZ 15W
TU 21122.5
Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21124
Data Interface Unit (DIU) NX64k V.11/V.35/X.21 2CH
Phased Discontinuation of Production – 31st May 2019 – 31st January 2020
The production of the ‘Dynanet’ family of PDH Transmission telecoms products, first introduced by Nokia over 20 years ago, and continued in recent years by DNWP, is finally being ended.
This product range has well served Public Operator and Private Network Customers across the Telecoms, Utilities, Transport and Public Safety markets with high availability mission critical infrastructure, and indeed some networks are continuing to provide good operational service.
Essentially almost all the old equipment items, with a very few exceptions such as the TPS64, are being completely discontinued in a phased way according to these milestones, which have already commended:
31st May 2019 – DM8 Multiplexers, DF2-8 Optical Terminals, RPSA
31st October 2019 – DM2 Multiplexers, Subs/Exch & VF Cards, DN2 IU2, Service Terminals, V.28/V.11 DIU
31stJanuary 2020 – DB2, DN2 CU & BPU, G.703 & V.110, DIU, Ethernet I/F, Ring Gen, NDM 19” Subrack, NDA
@YellowsBestLtd satisfies customer product sourcing requirements for current and ‘legacy’ equipment technologies.
Should you wish to read the full ‘ramp-down’ notice and know more about obtaining equipment before it is no longer available, then please get in touch.
32-bit Application compatibility Issues resulting from macOS updates
Issues have started to appear using existing and older software applications on Apple Macintosh computers with the transition from 32-bit to 64-bit operating systems, commencing with macOS High Sierra 10.13.4, and it’s set to get a whole lot worse!
Current Difficulties
Noticeable problems with applications have surfaced with the update to macOS Mojave.
Strange and unwanted things have crept in. For example:
opening a new Finder window causes a new tab to open instead. It’s like the wrong option has been selected – now opening a tab or a window are incorrectly identical. If you want a new Finder window, you need to then select ‘move this tab to a new window’. So suddenly this is a two-stage process
New Finder window opens a New Tab instead
Trying to print from Microsoft Word causes the application to ‘crash’. The work-around for this is its still possible to print by using the toolbar button, instead of selecting ‘print’ from the drop-down menu. But then this doesn’t allow for changing print settings etc.
Microsoft Word quits when trying to print
Promise of worse compatibility problems
This is just the ‘tip of the iceberg’. A whole range of software applications which currently run happily on the Apple Mac are set to become unusable in the next update to macOS. We’re talking about mainstream applications such as Microsoft Office as well as ‘niche’ applications that you may utilise. This appears to represent the biggest shift in software compatibility since the change from Mac ‘Classic’ (OS 9 and before) to Mac OSX, more than 10 years ago.
A warning is displayed when a 32-bit application is launched in macOS High Sierra, and in macOS Mojave the alert appears every 30 days.
The official Apple advice is to ‘contact the application developer’. For the average user, that’s unlikely to achieve anything, particularly for mature applications that perhaps are no longer available or don’t have ongoing development. With something like Microsoft Word, then it should be possible to obtain the latest version, but naturally that will require a new purchase and/or an annual subscription.
Purchasing a new version of existing software will be an expensive business to just maintain your existing functionality
Maintenance Decisions
The standard maintenance advice for computers is to upgrade to the latest available version of operating software; that way, security patches are up-to-date, keeping the system secure, with new functionality as well as bug fixes provided, and support for the latest applications.
On this occasion however, it is worth taking a long considered look at the benefits of upgrading verses sticking with your current macOS release. If you haven’t yet moved to macOS High Sierra 10.13.4 or macOS Mojave 10.14 then you may wish to stay where you are for now, particularly if you’re happy with your current applications and functionality, such as Microsoft Word 2008. If you’re contemplating upgrading, either because you ‘must’ for security purposes or need to support a new generation application, then it will be worth taking the time now to review all of your existing software and work out what the upgrade path will be, or find out what the alternatives you could migrate to e.g. Apple’s ‘Pages’ to replace Microsoft Word, etc.
The most worrying situation will be for owners of specific hardware e.g. the M-Audio USB Midi interface, which may not (and never will) have a suitable updated driver software alternative
In such circumstances of uncertain application support, backups are as always essential; ideally you should be in a position to ‘roll-back’, dual-boot and/or run virtual machines to maintain previous applications and functionality.
Consideration should also be given to maintaining a dedicated computer at the existing macOS version, and over time, migrating day-to-day applications (where they can be) to a new computer, keeping the old machine for ‘legacy support’.
Further Assistance
Take a look at the full Apple announcement about the transition to 64-bit technology and how it affects 32-bit apps.
@YellowsBestLtd satisfies new and ‘legacy’ requirements for the maintenance of systems and networks by providing services, such as technical assistance and hardware repairs, and solutions, including the supply of spare part items and software support.
We would be keen to hear from you regarding your operational needs, please get in touch.
The UMUX platform provides carrier-grade reliable multi-service multiplexing and aggregation functions over copper and fibre networks. A variety of voice (POTS, FSX, FSO, ISDN) and data (e.g. G.703, V.11, V,24, V,35) interfaces, SHDSL and Ethernet (including PoE+ and EoS) services are available.
UMUX module range
The modular and flexible housing provided by the UMUX 1500 (8U, 21-slot) and UMUX 1200 (4U, 8-slot) 19” subracks provide the perfect solution for all applications and locations, offering redundant controller and power supplies.
‘Legacy’ telecoms history
The UMUX SDH product portfolio was originally launched 1991 by Ascom, which subsequently became Keymile.
In 2003, by when 70,000 units had been deployed worldwide, the ‘enhanced’ UMUX multiservice access platform was introduced, offering the delivery of ATM, TDM and IP based services from the same platform, with support for IP/Ethernet, ADSL, VoDSL and G.SHDL.
Keymile was sold to ABB in 2017 when the UMUX range was discontinued, and then was acquired in 2019 by DZS.
Continuing to provide operational service
The UMUX, together with the UNEM network management system and ‘sister’ LINERUNNER and MILEGATE products, continues to provide operational service with various global Operator, Utilities and Transport companies.
@YellowsBestLtd supports requirements to maintain these networks by supplying various spare part items from refurbished and surplus stocks in perfect working order.
There follows a list of the main elements that are typically provided, though other items can be provided. Please let us know of any specific requirements you may have. We look forward to being of assistance.
Together with our broad range of new and ‘legacy’ equipment Technologies, we have now launched a portfolio of telecoms Products, enabling Customers to do more whilst reaping cost-benefits.
Below is listed the Market Sectors of our Customers, together with the equipment Technologies and telecoms Products we can supply.
We’re always keen to expand our portfolio, so please let us know anything you require as we can usually provide whatever is needed.
Market Sectors
Maintenance Companies
Private Networks & SMEs
Public Safety (Police, Fire, Ambulance)
Systems Integrators
Telecoms (Carriers, Operators)
Transport (Rail, Metros, Underground, Highways, Aerospace)
The Nokia ‘Dynanet’ family of PDH Transmission telecoms products has served customers well for the last 20+ years, and indeed some networks continue providing good operational service.
Dynanet Subtrack
@YellowsBestLtd has supported requirements to maintain these networks by supplying various spare part items from refurbished and surplus stocks in perfectly working order.
However, demand has recently reduced and warehouse space is needed, so now the time has come to recycle / dispose of a large proportion of the remaining equipment. Consequently, there remains a short-term opportunity to obtain any items still required to maintain existing deployed infrastructure, before the products are gone.
Here is a stock list of the main items currently available, though there may be a few additional parts that can be supplied. Hence, please check and if you do have any requirements, please let us know – before it’s too late! We look forward to hearing from you.
Part Number
Description
24204
TPSO H/W Module
CC 24002
DB2 Branching Unit, B2 2×2 Mb/s 75 ohm
CC 24011
DB2 2 Mb/s Switching Unit, X2 75 ohm
CC 24101
DN2 Interface Unit (IU2) 2×2 Mb/s 75 ohm
CC 24111
DN2 Control Unit (CU) 75 ohm
CF 24186
DN2 19″ Subrack
CF 24186.09
DN2 Subrack 19″, grey-L91 EMC
CG 24170
DN2 Bus Power Unit (BPU)
CG 24171
Extended DN2 Bus Power Unit (EBPU)
CU 24013
Data Interface Unit (DIU) 2M, nx64k: G.703/704, 75 ohm
T30506.09
17-slot DYNANET Subrack
T30851.02
Subrack Power Adapter (SPA)
T37870.01
NDM ACM2 19in 17-slot subrack
T37871.01
NDM DN2 19″ 17-Slot Subrack
T37882.01
NDM DC Unit (NDUe)
T37882.02
NDM DC Unit (NDUe)
T37885.01
NDM Ring Generator
T37889.01
NDM Backup Unit (NBU)
T65520.01
ACL2 RM DC Power Gen
T65580.01
ACL2i PF GEN Line Terminal Card
TA 21513
Optical Line Terminal Repeater 2-8 M, 1300 nm LED MM/SM
TA 21516
Optical Line Terminal Repeater 2-8 M, 1300 nm LASER SM
TC 21101
DM34 Mux Card
TC 21301
DM8 Multiplex Equipment, 75 ohm
TC 21705
Supervisory Substation
TC 21710.01
TMS Adapter
TG 21261
Ring Generator 25HZ 15W
TU 21122.5
Data Interface Unit (DIU) 48..64k V.11 10ch
TU 21124
Data Interface Unit (DIU) NX64k V.11/V.35/X.21 2CH
‘Legacy’ Networks; long history, but still important and operational!
Back in the day, when PDH (Plesiochronous Digital Hierarchy) was all there was for telecommunications optical and copper transmission, a familiar site was the ‘Multiplexer Mountain’.
PDH Multiplexer Mountain
Then came the new transport technologies: SDH (Synchoronous Digital Hierarchy) for high-speed digital communication (via optical fibre and radio links); and (D)WDM ((Dense) Wave Division Multiplexing) as an optical solution for raising the capacity of existing fibre networks (particularly when the fibre-count was limited).
Nokia launched the ‘Synfonet’ range as the big brother to their successful ‘Dynanet’ PDH portfolio, with SDH capacity of initially STM-1 (155MBit/s) and STM-4. Later came STM-16 and WDM.
Synfonet – STM-1/4
All in one subrack (REG, TM, ADM, DXC)
Wide range of tributaries
64kbit/s cross-connection server
Upgradable from STM-1 to STM-4 while in service
Compact, flexible and easy to expand
Nokia Synfonet
Synfonet – STM-16
2.5 Gbit/s, four times the throughput rate of STM-1/4
Nokia Synfonet
Synfonet – WDM
4–channel multiplexing / demultiplexing
8-channel multiplexing / demultiplexing
Up to 20 Gbit/s per fibre
Nokia Synfonet
But in 1999, Marconi Communications acquired (for over $100M) Nokia’s Synfonet brand, SDH and DWDM transport equipment products and about 120 staff from its Cambridge research and development business under the deal.
Inevitably over time Marconi rationalised their portfolio and the Synfonet range was discontinued, in favour of the SMA and MSH SDH equipment.
Business however took a downward path and in 2005 Ericsson acquired the key assets of Marconi (for SEK 16.8 billion). “Marconi” then became the registered trade-mark branding for Ericsson to promote these products, until phasing them out.
Marconi® Series 1 SMA1 Multiplexer
Flexible SDH Multiplexer
Terminal, Add/drop (ADM) or Digital Cross-Connect (DXC)
Marconi_SMA_Series1
Marconi® Series 3 & 4 SMA Multiplexers
Full range of options, including size and power variants
SMA1, SMA4, SMA16c and SMA16c+ Series 3 models
Tributary interfaces from 2MBit/s to STM-4
SMA1/4, SMA1/4c, SMA1/4E and SMA1/4UC Series 4 models
Supports ATM and IP with enhanced data functionality
Metro access and metro core deployment, and customer premises
Marconi-SMA-Series-34
Marconi® SMA 16-64 Multiplexers
Advanced ADM, DXC and low-order aggregator
Delivers 2.5GBit/s and 10GBit/s data transport capabilities
Full VC-12 granularity allowing single-layer access without VC-4 layer
Metro core deployment
Marconi-SMA-16-64
Marconi® MSH Series
Family of STM Multiplexers, Regenerators and Cross Connects
MSH11C, MSH41C, MSH51C, MSH63, MSH64, MSH64C and MSH86 Models.
MSH86-SHelf-Type-5
Marconi® MSH2K
Foundation of Marconi’s switching portfolio
DXC functionality, capacity of 320GBit/s
Support for STM-1 to STM-64 electrical interfaces
Embedded DWDM and support of SDH protection / restoration
Seamless transition from Ring to Mesh network architectures
Capable of upgrade to Multi-Layer Switch (MLS)
Metro core deployment
Marconi-MSH2K
Marconi® MSH64C
Based on same platform as MSH2K
Core ADM/XC, 80GBit/s switch, capacity of 32 x STM-64 interfaces
Consolidating and grooming traffic.
Gigabit Ethernet interfaces for data transport
Embedded DWDM interfaces
Marconi-MSH64C
From 2007, Ericsson launched the (still) Marconi® branded OMS (Optical Multi Service) portfolio of advanced SDH multiplexers, including OMS 1200, OMS 1400 and OMS 1600 providing multi-service products for Metro-Edge and Metro networks. The “Marconi” brand was later dropped by Ericsson for this OMS range.
OMS 1200 range
Range of SDH ADM
Optimised for ring and terminal applications
OMS1200 series
OMS 1400 range
Compact energy efficient multiservice and packet optical transport.
Optimized for use in Metro Access networks
Carrier class Ethernet and TDM services interworking with metro and core Networks based on SDH, Ethernet or IP/MPLS
Applications ranging from high capacity customer sites, fixed or mobile backhaul/Radio Access Network (RAN) aggregation and transport
Marconi_OMS_1400
OMS 1600 range
Compact, multiservice transport and switching platform
High port density reducing space and power consumption
Range of data and TDM services, fulfilling ITU- T G.782 requirements
OMS1600 Series
The OMS range provided packet evolution capabilities to Ericsson’s optical networking portfolio and strengthened its Full Service Broadband offering, meeting the demand from operators to evolve their network to support a mix of services and traffic types, with dexterous backhaul connectivity, TDM or Ethernet-based, with telecom quality, flexibility and scalability.
Perhaps this ‘potted history’ helps explain the ’journey’ these products took, and clarifies why they can be referred to as both Nokia and Marconi, or indeed Ericsson. Although now discontinued by these manufacturers, the products are extensively deployed and still in use by Telecoms Operators, Utilities and Transport companies.
Supporting ‘Legacy’ Networks and Keeping Customers Operational
From time-to-time Customers benefit from services from @YellowsBestLtd
Locating Nokia, Marconi, Ericsson (and other vendors) hard-to-find replacement items
Hardware repair services to existing parts
Supplying additional spares for newer systems to increase capacity or provide alternative interfaces
This way these ‘legacy’ but still important networks can continue to be maintained and kept operational.
To illustrate the possible requirements for spares and repairs, some key parts from the above networking technologies are listed, as follows:
Nokia - Synfonet
Part Code
Family
Description
STM-4 (T30023.01 – 71.02)
Synfonet
STM-4 card
STM-16 (T30172.02 – .06)
Synfonet
2 x STM-1/4 WDM Mux
WDM MUX (T30172.41)
Synfonet
2 x STM-1/4 WDM Mux
STM-1 E/140M (T3033.01)
Synfonet
140Mbit/s STM-1 electrical IU
34M/45M (T30046.02)
Synfonet
34/45Mbit/s electrical IU
2M TA (T30041.01 – 43.01)
Synfonet
2Mbit/s interface units
CU (T30073.01)
Synfonet
Node control and timing unit
SSW (T30053.01)
Synfonet
System Switch Unit
SU-A (T30084.01)
Synfonet
Service unit / EOW
SPIU (T30093)
Synfonet
PSU Card
TSW0 (T30110.01)
Synfonet
64 kbit/s cross-connect unit
TSW1 (T30063.01)
Synfonet
Cross-connect unit for STM-4
Marconi - SMA / MSH
Part Code
Family
Description
02HAM00002AAJ
SMA-1/4
21 X 2M LTU Balanced
02HAM00003AAL
SMA-1/4
63 X 2M LTU Unbalanced
03HAT00010AAS
SMA-1/4
10/100MB Ethernet Module
1HAM61217AAK
SMA-1/4
Power Unit
1HAT 60796 AKU
SMA-16
STM-16 OPT.TCM AHK S16.1 (SC)
1HAK 60596 AAE
SMA-16
STM-16 RX OPT S16.1
1HAK 60701 ABM
SMA-16
STM-16 TX OIC 1310nm (FC/PC)
1HAT 60730 ADL
SMA-16
STM-16 LINE UNIT 1550nm (FC/PC)
1HAT 60730 AJX
SMA-16
STM-16 LINE UNIT 1310nm (FC/PC)
1HAT 60730 AMA
SMA-16
STM-16 L-16.1 SC
1HAT 60730 ANS
SMA-16
STM-16 L-16.2/3 SC
SN99AD
SMA-16
Power Supply Unit
Part Code
Family
Description
133-1467/01
MSH86
Matrix Shelf
131-9475/21
MSH64
STM-64 S64.2 SC/PC
131-9475/22
MSH64
STM-64 L/V/U64.2 SC/PC
131-8685/01
MSH11C
3 X 34MBit/s Tributary Unit G.703
133-1260/01
MSH84
MSH86 Shelf Type 5
130-3118/01
MSH84
Trib Matrix Board
130-3132/01
MSH84
Control Matrix Sub Unit
130-3142/01
MSH84
Main Control Sub Unit
1MBD60697AAT
MSH2K
Shelf
02MBB00001ABG
MSH2K
S-16.1 Module, LC
02MBB00001ACY
MSH2K
L-16.1 Module, LC
02MBB00001ADR
MSH2K
L-16.2 Module, LC
Ericsson – OMS
Part Code
Family
Description
03HAG00001AAX
OMS1200
A/D Mux System Chassis
03HAM0019AAQ
OMS1200
HI Power DC Supply
03HAN00007AAH
OMS1200
AC Power & Battery Backup
03HAN00009AAM
OMS1200
Fan Unit
03HAT00041AAQ
OMS1200
Common Control ADM Unit-A
03HAT00041ABH
OMS1200
Common Control ADM Unit-B
03HAT00045ABR
OMS1200
Ethernet Prnt Card
1HAT61107ABC
OMS1200
64 x 2M Core Trib Card
1HBA60828AAX
OMS1200
32x 2M Unbalanced LTU
1HBA60832AAA
OMS1200
32x 2M Balanced LTU
1HAT61106BAE
OMS1200
Comm/Aux/ANC Unit
1HAM61217ABC
OMS1200
Power LTU Mod
Part Code
Family
Description
03HA500032AAC
OMS1664
STM-1 Switch Card
03HAM00006AAT
OMS1664
STM-1 Line Terminating Card
03HAM00015AAG
OMS1664
10/100 Electrical LTU-Type 2 (SK57BC)
03HAT00015AAD
OMS1664
STM-4 Line Card
03HAT00016AAF
OMS1664
STM-4/16 Core Card
03HAT00021AAK
OMS1664
STM-16 Line Card
03HAT00020AAH
OMS1664
STM-64 Line Card
03HAT00029ACM
OMS1664
16xE1
03HAT00053AAK
OMS1664
140M Transmux Card
03HAT00057ABL
OMS1664
Ethernet L2 Data Switch Prnt Card
03HAT00054AAM
OMS1664
Ethernet Layer 2 (8+16 Ports) (SK58AB)
03HAT00057ABL
OMS1664
COMPAC FLASH card
1HAG60619AAK
OMS1664
Standard Shelf
1HAG60620AAF
OMS1664
Compact Shelf
Please get in touch and let us know what you need to keep your network in good shape!
Customers who own infrastructure systems usually require some form of test equipment to assist with the build, operation and maintenance activities.
Given the mixture of old and new technologies now deployed, consequently the range of available test equipment options has grown considerably. And like the infrastructure systems themselves, new functionality demands and obsolescence issues also affect the associated test equipment needs and availability.
@YellowsBestLtd assists Customers by sourcing the required test equipment, supplying either modern or legacy units. Often refurbished ex-hire equipment in excellent condition and at commercially attractive prices makes sense over leasing. This ensures the continued availability of sets of the appropriate specification, which may become discontinued by the manufacturers over time.
If necessary, we can also arrange the repair of existing units, especially those that perform very specific functions that cannot easily be replicated with more recent equipment.
There follows a brief description of many of the types of test equipment available; we would be very keen to hear from you to understand your specific requirements, so please get in touch!
Calibration Checkboxes
Calibration checkboxes, or electrical checkboxes, are used for routine observations of test equipment and allow users to maintain accuracy in between official calibration procedures. Suitable for use with PAT testers and with other testers and instruments.
Calibration Checkbox
Component Analysers
These test the efficiency and status of components including transistors and capacitors. An essential instrument for development engineering when specific components are used in product design.
Component Analyser
Earth Loop Testers
Loop impedance testers, or loop testers, verify the loop impedance of a live electrical circuit without disconnecting from the electrical supply. Most testers include non-tripping RCD technology as standard to prevent unexpected outages.
Earth Loop Tester
Earth Testers
These verify that electrical current paths are safely earthed. Earth spike testers, high current loop testers with earth stakes and leads are available.
Earth Tester
EMF Meters
EMF meters are used for verifying the presence of electrical magnetic fields given off by electrical equipment. Ideal for use in heavy-duty electrical applications and laboratory testing conditions.
EMF Meter
EVSE Testers
EVSE testers are purpose-built for the installation, testing and maintenance of electrical vehicle supply equipment and are an essential for use by electrical vehicle charging point installers, manufacturers and anyone else involved with EVSE equipment.
EVSE Tester
Insulation & Continuity Testers
A wide range of insulation and continuity testing instruments which include Megger insulation testers, insulation resistance testers, Fluke testers and insulation meters from Amprobe, DiLog, Seaward, Metrel, Martindale, Kewtech and Extech.
Insulation and Continuity Tester
LCR Meters
LCR meters get their name from their testing capabilities – they can test inductance (L), capacitance (C) and resistance (R).
LCR Meter
Multifunction Testers
Ideal for use when completing or testing an electrical installation. The huge range of MFTs include the Fluke 1600 range and Megger installation testers.
Multifunction Tester
Optical Fibre Inspectors
Quickly find and inspect the right port. Like having a built in flash-light so you can see in dark areas and dense panels. Pause button holds the image for viewing when it’s hard to get it just right. Bright backlit display. Screw-on probe tips to support most connector types.
Optial Fibre Inspectors
Optical Fibre Visual Fault Locators
Locates fibres, finds faults, verifies continuity and polarity. Locates visual faults including tight bends, breaks and bad connectors. Easily verifies polarity and identifies fibres. Features continuous and flashing modes.
Optical Fibre Visual Fault Locator
Optical Power Meters
Multimode and Singlemode Power and Loss Measurements. Multiple kit configurations with light sources for single mode, multimode and PON fibre optics. Min/Max capability automates tracking of intermittent power fluctuations.
Optical Power Meter
PAT Testers
For Portable Appliance Testing (PAT) routine safety checking of electrical equipment, including dual insulation test voltages and portable RCD lead testing, with adjustable PASS testing limits and substitute/mains powered leakage testing procedures.
PAT Tester
Power Quality Analysers
These provide a comprehensive snapshot of how power is being used in your facility and verify where energy is being lost. The latest power analysers and power analysis tools include those from Fluke and Hioki.
Power Quality Analyser
Production Line Safety Testers
Perfect for laboratories and product design applications, the equipment in this category can be used to verify electrical safety, service equipment using multiple electrical parameters and to simulate PAT conditions.
Production Line Safety Tester
Proving Units
An essential accompaniment to a voltage tester, proving units verify that the tester remains accurate both before and after testing. Both the NICEIC and NAPIT strongly recommend using these regularly when testing.
Proving Unit
RCD Testers
For testing RCD trip time and overall residual current device safety/efficiency. Available are handheld RCD testers, Megger RCD testers, RCD analysers and multifunctional RCD testers which also measure loop and PSC.
RCD Tester
Socket Testers
These testers are placed into a socket to assess faults with the wiring using audio/visual feedback.
Socket Tester
Telecom Datacom Analysers
Ideally suiting traditional telecommunications networking requirements, typically providing testing at V.24, V.35, V.11/X.21 interfaces at rates up to 2 Mb/s. Also a full range of BER/BLER measurements, control-circuit timing analysis with transitions diagrams and storage in text and graphic form.
Telecom Datacom Tester
Voltage Testers
Voltage Testers
These verify the presence of voltage, and allow full test of voltage levels. Instruments are available from the leading test equipment manufacturers such as Fluke, Kewtech, Martindale, Amprobe and Megger.
In order to get the best out of data centre infrastructure, ensuring equipment runs at its most efficient, reducing risk of failure and extending its life span, attention should be paid to ensuring the optimum operating environment. Efficiencies impacting on both the building cooling systems and power for room hardware (servers, switches, routers, etc.) means that improvements will pay for themselves, whilst also lowering the carbon footprint to the benefit of all. Solutions range from quick deployment for office computer room spaces with low power demands through to high density Data Centre applications delivering true containment giving scalability, mixed power zones and zero hot spots.
@YellowsBestLtd we would be very keen to discuss further; since the exact project requirements dictate the costs and savings to be gained, we can arrange a site survey as appropriate without cost or commitment. Hence please contact us; we look forward to hearing from you.
Ultrasonic Humidifiers
Low energy ultrasonic humidifiers have been widely used in data centre projects for many years. They consume a fraction of the energy of an equivalent steam humidifier, providing an assistance to data centre cooling with hygienic operation and virtually maintenance-free operation. There are a range of units available for installation within air handling units, cooling corridors or in the data hall itself, on any scale.
Cold Aisle Containment
Cold Aisle Containment is a non-intrusive bespoke retrofit to data centres, whereby the cold aisle is contained and supply and exhaust air separated to maximise cooling efficiency. By creating a positive pressure, air is directed straight into the servers, making them run more efficiently, whilst preventing recirculation of air back to the computer room significantly improves the efficiency of the building’s cooling system. Better control of the room’s temperature results in energy savings, and providing temperature equilibrium across all servers addresses the problem of overheating in the top third of the rack, where traditionally most server failures occur.
