The Pm for the Bowa 400 is not too long, only 89 steps. The Bowa 400 is driven by pictures, not words, so you have to set the mode by the correct icon (icons),this is something you can do within the Datrend ESU testers, see the picture of the setup, make the setup, then set the Bowa according to the picture, then activate the Bowa. Pass fail is automatic.
The Bowa ESA has a special mode for performing safety tests, which you set, then perform the EST, then after the EST, turn the safety test mode off.
Its actually one of the simpler PM procedures. The procedure can be downloaded, emailed as required, and is written using the free Datrend software, the PM procedure is also free. If anyone wants more details please email me.