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Test & measurement


HPATs simplify portable appliance testing W


hen it comes to testing portable appliances, the HPAT Series of portable appliance testers from


Martindale Electric now includes the HPAT400 and new updates to its existing range, to enable both contractors and competent in-house personnel to quickly and safely verify the electrical safety of all types of appliances. Designed to perform safety checks in


accordance with the IEE Code of Practice, the lightweight HPAT Series of handheld testers are designed for ease of use with one button automatic testing and ultimate portability. The compact design with bright backlit display, provides the perfect solution for testing in all locations, particularly under a desk or behind a monitor, where lighting may be restricted. Easy to use, the HPAT400 is an affordable,


battery powered PAT tester. Suitable for Class I and Class II appliances, the basic tester incorporates large PASS/FAIL indicators and simple connection instructions on the tester. For applications which require combining simple PASS/FAIL with actual test values, the HPAT500 is ideal and now features a low insulation test voltage, making it suitable for testing surge protected devices. For added convenience, the HPAT500 is mains rechargeable for reduced running costs and can


be operated from the mains via the supplied charger to ensure no down time. Also available in the range is the HPAT600 which includes both automatic one button testing like the HPAT400 and HPAT500, plus single test selection for diagnostics. The HPAT600 features a run test for checking the integrity of the fuse and that the appliance is switched on prior to testing. The pass levels can be easily adjusted for testing appliances with long power cords or long extension leads. In addition, it has memory for storing test results of up to 200 appliances for on-screen recall at a later time. The latest range of PAT testers from


Martindale Electric feature a colour coded user interface with clear connection instructions on the tester or on screen, making operation simple, every time. All three models come supplied in a practical


‘Test & Go’ carry case, with space for accessories, meaning valuable time is saved as there is no need to unpack and repack the testers when taking measurements. With an increasing number of prosecutions


brought by Health & Safety inspectors for failure to carry out routine inspections of electrical equipment, all these features make the Martindale HPAT the solution of choice for


implementing an efficient and cost effective portable appliance testing schedule to keep users safe and reduce potential fire hazards. Martindale Electric offers a comprehensive range of portable appliance testers, voltage testers, proving units and locking off devices to ensure compliance with the Electricity at Work Regulations for the safe maintenance of plant and equipment and the safe operation of electrical appliances.


Martindale Electric martindale-electric.co.uk


NEW LEVEL SWITCHES TO OPTIMISE OPERATIONS AND INCREASE SAFETY IN SOLIDS APPLICATIONS


reduce waste by providing reliable point level monitoring and supporting overfill prevention. The introduction of switches based on four proven and trusted technologies enables Emerson to offer a complete product portfolio for continuous and point level solids measurement. This ensures that the appropriate solution can be deployed to meet every application requirement.


E


merson has introduced a range of new Rosemount solids level switches designed to optimise operations, increase safety and


The vibrating fork, paddle, capacitance and


vibrating rod switches within the new Rosemount range ensure reliable monitoring of solid materials such as powders, grains and pellets in all silo types across industries including food and beverage, agriculture, chemical, power, cement, mining and plastics. The compact, easy- to-operate switches require low levels of maintenance and are suitable for operation in extremely challenging environments, including those with high temperatures, high pressures, dust and risk of explosion.


The switches can be used to provide standalone point level monitoring to help optimise filling and emptying cycles. They can also be deployed within an overfill prevention system, helping to prevent wasted


materials, environmental impact, high clean-up costs and damage to the silo. In applications involving light, fine-grained and


powdered materials where high measurement sensitivity is required, Rosemount 2511 and 2521 vibrating fork switches provide a cost- effective solution. European Commission ATEX (Atmosphères Explosibles) certification permits installation in explosive areas, and all wetted parts are made from corrosion-resistant stainless steel, making them suitable for use in hygienic applications. The Rosemount 2501 rotary paddle switch can be used as a full, demand or empty detector in storage silos or process vessels. The robust paddle design can withstand heavy loads and extreme temperatures of up to 1,100° C. The Rosemount 2555 capacitance switch can be installed in pipes as a limit switch and spillage detector. The switch is suitable for use with materials that have dielectric values as low as 1.5 and is designed to prevent material build-up in applications where there is a risk of coating. The Rosemount 2535 vibrating rod switch provides high chemical resistance due to the fact that it is completely made of food-grade stainless steel. www.emerson.com


58 June 2020 Instrumentation Monthly


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