The right PAT tester is the one that matches the work you do, from a handful of office appliances to thousands of items across multiple sites. Buy too basic a unit and you will outgrow it; buy too advanced and you pay for features you never use. This guide walks through the types of tester available, the features that actually matter, and how to match a tester to your volume and workflow so you get the right tool first time.
The main types of PAT tester
PAT testers range from simple go/no-go checkers to sophisticated instruments that store thousands of results. Understanding the categories is the first step.
|
Type |
What it does |
Best for |
|
Pass/fail |
Runs the tests and shows a simple pass or fail |
Low volumes, non-technical users |
|
Manual |
Displays actual measured values to record by hand |
Occasional testing where results are logged manually |
|
Downloading |
Stores results and downloads them to software |
Higher volumes and formal record keeping |
|
Advanced / kit |
Full data entry, barcodes, printing and software |
Professional testers and large estates |
The jump that matters most is from a pass/fail unit to a downloading one. As soon as you are testing enough items that manual record keeping becomes a burden, a downloading tester pays for itself in saved time and cleaner records.
Match the tester to your volume
Volume is the single biggest factor. If you test a small number of appliances once a year in one office, a straightforward pass/fail tester is perfectly adequate and easy for a non-specialist to use. If you test hundreds or thousands of items, or you test for other people as a service, you need a downloading tester that captures results automatically and produces reports without re-typing.
Be honest about where you are heading, not just where you are today. A business that is growing, or that expects to bring testing in-house across several sites, is usually better served by stepping up to a downloading unit sooner rather than replacing a basic tester a year later.
Class I and Class II appliances
Any tester you choose must handle the appliance classes you will meet. Class I appliances rely on an earth connection and need earth continuity and insulation testing. Class II appliances are double insulated with no earth, and are tested differently. Almost all mains PAT testers cover both, but confirm the tester suits the mix of equipment you actually have, including any leads and extension cables that need their own tests.
Data, download and software
For anything beyond the smallest workload, how a tester handles data is where the real time is won or lost. A downloading tester stores each result against an asset ID and transfers the lot to PAT software such as Megger CertSuite, which builds the reports, tracks retest dates and keeps the audit trail. Some testers add barcode or QR scanning to speed up asset identification, and wireless links to move data without cables. If you produce certificates for clients, this side of the tester matters as much as the tests themselves.
Practical features that make a difference
Beyond the headline capability, a few practical features shape the day-to-day experience.
- Battery or mains. Battery testers suit fieldwork and moving between sites; mains units suit a fixed bench.
- Test speed and automation. Pre-set test sequences and quick connections speed up high-volume work.
- Ruggedness and portability. A tester carried around a site needs to survive the journey.
- Ease of use. If a non-specialist will use it, simple menus and clear prompts reduce errors.
Keep it calibrated
Whatever you choose, a PAT tester is a measuring instrument, and its readings drift over time. Regular calibration against traceable standards keeps its results, and therefore your certificates, defensible. Factor the calibration cycle into your running costs when you compare models.
FAQs
Do I need a downloading PAT tester?
If you test more than a small number of appliances, yes. A downloading tester stores results and transfers them to software, which removes manual record keeping, cuts transcription errors and produces reports and retest schedules automatically. For a handful of items a year, a pass/fail tester is enough.
Can one PAT tester test both Class I and Class II appliances?
Almost all mains PAT testers handle both classes, applying the appropriate tests to each. Confirm the model suits the full mix of equipment you have, including leads and extension cables, which need their own tests.
How much does calibration cost, and how often?
PAT testers are typically calibrated annually. The cost is modest against the value of defensible results, and it should be planned as a regular running cost rather than an afterthought.
If you would like help matching a tester to your workload, talk to us about the Seaward, Fluke and Megger PAT ranges and our calibration service.