Martindale CB12 Calibration Checkbox

  • Calibration checkbox for checking the ongoing accuracy of electrical testers
  • Selectable resistance range
  • 4mm connectors
  • 2 Year Martindale Warranty

£49.86 exc VAT / £59.83 inc VAT

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Martindale CB12 Calibration Checkbox

The Martindale CB12 Calibration Checkbox checks the resistance/continuity readings of instruments to verify ongoing accuracy.

Ideal for use both in the workshop and when on site, designed with simplicity in mind. Just connect the instrument under test via the 4mm terminals on the front of the checkbox, select a resistance value with the rotary dial and set your tester to the relevant range.

Key Features:

  • Portable checkbox for checking the accuracy of electrical testers such as multimeter, clamp meters and insulation testers
  • Selectable resistance range – 0.5Ω, 1Ω, 2Ω, 20Ω, 200Ω, 1kΩ, 10kΩ, 20kΩ, 100kΩ, 1MΩ, 2MΩ, 10MΩ
  • 4mm terminals for connection to your instruments
  • Rotary dial selection
  • Max voltage input of 1000V DC


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