Testo 350 XL 350 M/XL 454 Flue Gas Analyzer Kit WITH Probe. READ DESCRIPTION!!!

Description

Testo 350 XL 350 M/XL 454 Flue Gas Analyzer Kit WITH Probe. READ DESCRIPTION!!!
Powers on, Came from a local utility company. I was told it worked great but I cannot verify that at all so assume it may need something or some calibration.
Powers on. I do not have the ability or know how to fully test this unit. I have provided pictures of everything that will be included with this. Please look over everything very carefully as I will NOT be accepting returns. Unit does power and seems to function as it should but like I said I have no idea where to even start to begin testing this unit.
Extra parts / calibration may be required to fully use this item. PLEASE LOOK OVER every picture carefully. Case on the inside has had some foam repair done.
Signature will be required upon delivery.
Thank you for looking!