Fluke TP88 Rigid Back Probe Pins FGP-NG-3 The M811B Digital Clock is

The M811B Digital Clock is a multi-functional chronometer designed to operate under the most stringent operating conditions

diodes are connected across each cell and fuses are connected to the output

It is equivalent to the CI 121 except it features a bent whip configuration

and has a built-in hourmeter

500A circuit at 120V

Fluke TP88 Rigid Back Probe Pins FGP-NG-3 The M811B Digital Clock isBetter than a test probe alone, the Fluke TP88 Rigid Back Probe Pins are two inch long rigid probe pins that easily pass between the weather pack seal and wire. A sharp point ensures good contact with the electrical connector, and the pin's insulation protects it from shorting to other wires.