I am selling this as FAULTY because:Instrument is tested and measures correctly across the whole range. The display is a replaced and used and fixed part, in the corners darker spots are visible and a homogenous background pattern can be seen. There is a small light patch on the display. Other than this, all pixels work and the information can be read perfectly. The front panel buttons have been broken off and the previous owner replaced them with tactile buttons. They sometimes dont work, then I just wash them with isopropyl alcohol and they are fine. The unit is offerd as-is with these errors.
Measurement:
Insutrment measures across the whole range correctly, no problems observed.