Calibration Checkbox

• All types and makes of multifunction tester
• All types and makes of separate Loop, RCD & Insulation / Continuity Tester
• Checks continuity 0 - 10Ω
• Checks insulation resistance 1 - 200Ω
• RCD test checks at 30mA and 150mA
• Checks loop at socket +0.50Ω, +2.00Ω and 50Ω
• Can be used to check voltage & resistance on multimeters
• Compact design
• Complete with padded case

The TIS Checkbox is a very useful tester which ensures on a weekly, monthly basis that all your multifunction testers or individual loop, RCD, insulation and continuity testers are within specification. This unit does not replace your annual calibration procedures.