TBH I'm a bit out of my depth here. I think the type of tester you mean is for checking injectors from mechaical injection, (non-common rail), engines?
Assuming it's the right range, (the one I looked at was 600 Bar), you might be able to borrow / connect the gauge to your fuel rail, perhaps in place of the pressure sensor, for the sake of a quick test. (I'm just trying to think of a way of determining if your HP pump is working, before you go to all the trouble of removing it).
406 HDI FUEL FILTER HOUSING
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Doggy
- Mod with a 2.2 HDi, De-Fapped!
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Re: 406 HDI FUEL FILTER HOUSING
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)