Uni-T 528 PAT Tester

£299.00 +VAT

  • Battery powered PAT tester.
  • 3 button operation – Easy to use.
  • 250V insulation test and long extension lead feature.

Data Sheet



The UT528 PAT tester from Uni-T is a basic and battery-powered PAT testing machine that conducts tests on Class I and Class II appliances, as well as extension leads using a separate test sequence. Using a simple three-button operation the Uni-T is easy to use and handy for individuals who are new to PAT testing and would prefer a simple PAT instrument.

The Uni-T UT528 carries out the basic required tests upon selection of the appliance type (Class I / Class II / Extension Lead) in an automatic test sequence and displays the readings and PASS/FAIL status at the end of the test. Aside from the basic test requirements the UT528 PAT Tester also has the following features inbuilt:

  • Zero Earth Lead function: Used to zero out resistance built up within the earth test lead to avoid inflated Earth Bond readings as a result.
  • 250V Insulation Test option: In addition to the standard test voltage at 500V, a lower voltage of 250V can be selected. This is ideal when testing extension leads with surge protection.
  • 30m Long Lead Test: Activated when testing extension leads exceeding 30m in length. This increases the earth resistance allowance in accordance with guidelines for long extension leads.

The Uni-T UT528 is capable of testing all standard appliances fitted with a 230V plug and all standard 230V 13A extension leads and IEC leads. Using a low test current exclusively at 200mA  the Uni-T UT528 is also safe for testing any IT equipment.

The UT528 comes supplied in a hard plastic carry case that holds the instrument and basic accessories, The kit also includes an earth bond lead with probe and clip, 230V extension lead adaptor, earth nulling adaptor, 6 x C cell batteries and instruction manual. The Uni-T UT528 has been calibrated at the time of production but is NOT supplied with a calibration certificate as standard. If this is required then please select when adding to basket.

Key Features:

  • Battery powered and lightweight
  • 3 button operation
  • Inbuilt auto sequence tests
  • 250V/500V Insulation Test
  • Low current earth bond test – Safe for IT equipment
  • Setting inbuilt for long extension leads
  • Supplied in a hard plastic case
  • Lead nulling function
  • Supplied with 12 months warranty


Earth Continuity

  • Test Current: +/- 200mA DC
  • Display Range: 0.00Ω – 19.99Ω
  • Pass Value Class I: 0.2Ω
  • Pass Value Cord Test: 0.2Ω

Insulation Range

  • Test Voltages: 250V/500V DC
  • Display Range: 0.20Mohms – 19.99Mohms
  • Pass Value: 1MΩ (for Class I)
  • Pass Value: 2MΩ (for Class II)

IEC Lead Test

  • Tests Performed: Earth Continuity, Insulation Resistance, Live, Neutral Continuity and Polarity

Equivalent Leakage Class I

  • Test Voltage: 40V, 50Hz AC Nominal
  • Display Range: 0.10mA – 19.99 mA
  • Pass Value: 0.75mA

Equivalent Leakage Class II

  • Test Voltage: 40V, 50Hz AC Nominal
  • Display Range: 0.10mA – 19.99mA
  • Pass Value: 0.25mA


  • 210mm x178mm x 90mm


  • 870G (without batteries)
  • 1200G (with batteries)

Supplied Accessories

  • Uni-T UT528 PAT Tester
  • Hard plastic Uni-T carry case
  • Earth Bond Lead with probe and crocodile clip
  • Earth nulling adaptor
  • 6 x C cell batteries
  • 230V Extension Lead Adaptor
  • Neck strap
  • Instruction manual UNI T UT 528
  • 12 months manufacturers warranty

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