Thank for your reply.
You do need a precise/accurate checkbox kit (designed for the BattPat) in order to determine if the fail threshold & functions are correct. Without knowing this information is equivalent to testing blindfolded.
A yearly calibration is essential as well as checking the good working order (see list of tests**) of a BattPat on a regular basis. Simply pat testing and relying on the Pass/Fail information is not sufficient; the information needs to be meaningful and reliable.
Using a standard checkbox (off the shelf: like Seaward, Kewtech, etc.) to regularly check the BattPat is not a solution at all. This type of checkbox requires the pat tester to have a digital display to compare result. The BattPat does not have a digital display.
DIYing a checkbox kit good enough to check the BattPat is a solution. However, this requires precise/accurate/calibrated testing equipment, a good design, the correct material as well as skills/knowledge.
** List of recommended tests for the BattPat (regular tests)
-Detecting Earth Continuity faults (3 tests): Less than 0.1Ω, 0.25Ω fail threshold, 0.50Ω fail threshold
-Detecting Insulation faults (3 tests): Less than 0.1Ω, 2MΩ fail threshold, 4MΩ fail threshold
-Detecting Polarity faults (5 tests): Earth conductor fault, Line conductor fault, Neutral conductor fault, Line-Neutral conductor reversed fault, Line-Earth conductor reversed fault.
-Insulation Test Voltage: 360V
NB: manufacturer tolerances needs to be respected.
For more information on testing tools & equipment as well as formal calibration, please contact Jo on 07 508 508 200 or email email@example.com