The verification unit is used for regular validation of the PD-400 personal tester. The tolerances and limit values of the PD-400 can be checked quickly and easily.
The following resistors are located between the test plug and the safety plug or the device connection:
| Fail Low | Pass Low | Pass High | Pass Low | |
| Wristband 35 MΩ | 680.0 kΩ | 816.0 kΩ | 91.8 kΩ | 38.2 kΩ |
| Footwear 100 MΩ | 91.0 kΩ | 109.0 kΩ | 91.0 kΩ | 109.0 kΩ |
Each individual mode of the 4 modes is checked by turning the rotary switch to the desired mode (Fail Low to
Fail High). The corresponding measurement is then carried out with the contact pin.
