Surface Insulation Resistance Testing
AutoSIR2+ - SIR Testing

The AutoSIR2+™ system - your assurance for quality and reliability in electronics. 

The AutoSIR2+ represents a dramatic improvement over existing SIR test alternatives, and its shielded precision electronics allows state-of-the-art accuracy resistance measurements to be made up to 1014 Ω.

Enhanced flexibility

The AutoSIR2+ is available with 3 diffent channel options: 64 channel, 128 channel and 256 channel systems. Each channel is current limited (1 M Ω), which encourages growth of dendrites for failure analysis. Combined with our fully customisable test racks, our different channel options enable parallel testing of several PCBs simultaneously. This feature significantly increases testing throughput, reducing the time required for SIR testing.

The frequent monitoring capability provides a full picture of the electrochemical reactions taking place on a circuit assembly, and provides early trend analysis enabling tests to be curtailed, thus saving considerable test time and money. 


Our user friendly interface and intuitive features eliminate the need for extensive training, allowing users to quickly familiarise themselves with the software and start testing easily. We offer the flexibility of testing at intervals from as little as 1 minute!   

We also offer the use of multi bias testing where 3 voltages can be applied at the same time in combination with our test racks. This enables our customers to test different boards all at the same time. 

High voltage capability

With increasing demand, we have developed the capability to offer testing solutions up to 1250V utilising our CLRHV. Contact us now for further information. 

Key Features

  • Measurements from all 256 Channels can be taken in <30 seconds
  • Applied Voltage: +1V to 100V
  • Measurement Range: 106 Ω to 1014 Ω
  • Measurement Method: Continuous on all selected channels
  • Measurement Test Intervals: Fully selectable from minimum of 1 minute
  • Capable of testing to all existing test specifications – IPC – IEC – JNC and other user specifications
  • Future proofed design
  • AutoSIR2+ is available with 64, 128 or 256 channel configurations
  • On connection the system runs a self test
  • Adaptable and flexible software operating with Windows 7 onwards

Technical Specifications

Number of Channels 64 or 128 or 256
Measurable range of insulation resistance 106 to 1014 Ω
Internal Bias Voltage

0V; 3.3V; 5V; 10V; 12.5V; 15V; ±50V, ±100V

External Bias Voltage 1V to 100V free selection external 1V to 1250V
Measurement Method Continuous on all selected channels
Measurement Test Intervals Fully selectable from minimum of 1 minute
Measurement Speed Optimised at <100ms per channel for data management
Maximum Test Duration Unlimited
Current measuring cable Fully shielded

Low resistance
Test Running
Temperature and humidity
Bias Voltage Out of Range/Failure

Data collection Sampling Time, Elapsed Time,
Resistance, Current, Applied Voltage,
Temperature, Humidity
Applicable OS Windows® 7 onwards
Power requirment 110V/230V Switchable mains
single phase

17 kgs (37.5 Ibs)

52 x 34 x 17cm

For full tech spec, please email

AutoSIR2 and AutoCAF2 Accessories

Gen3 offers custom Test Racks as accessories to the AutoSIR2+ & CAF2+. 

Our customisable test racks are designed to facilitate and streamline the SIR & CAF testing process. These test racks are engineered to accommodate multiple printed circuit boards (PCBs) or electronic assemblies for simultaneous testing, making the process more efficient and cost-effective. We can design our test racks around ANY test coupon or assembly and can work with you to design your own coupons for your own manufacturing requirements. 

Our test rack can offer you:

  1. Flexibility: The test racks are designed to be highly flexible, allowing for easy customisation to meet the specific needs of different PCB sizes, shapes, and configurations. This adaptability ensures compatibility with a wide range of electronic components and assemblies.
  2. Multiple Testing Ports: Our racks typically have multiple testing ports, enabling parallel testing of several PCBs/ simultaneously. This feature significantly increases testing throughput, reducing the time required for SIR testing.
  3. Rain Guard: All of our racks come with a rain guard in case the environmental chamber has an issue where 'rain' occurs. The rain guard protects your assemblies from direct droplets. 
  4. Precise Test Point Access: Our test racks are designed to ensure precise and reliable contact with the PCB's test points. Proper contact is critical for obtaining accurate SIR test results.
  5. User-Friendly: Our test racks are designed to simplify the setup and operation for SIR/CAF testing, making them accessible to operators with varying levels of expertise. 


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