Solomat MPM Logger Power Pack W/ DS 200 4 and 50 similar items

Solomat MPM Logger Power Pack W/ DS 200 4 Ch. Switching Module 4 Sensors This is a used item. It is also marked, "MPM 2000". The main battery is dead at this time and may need to be replaced. We were able to power it on with a shop power supply (not included). The screen comes on and is clear and easy to read. There is some corrosion in the plastic battery compartment of the logger unit and we cleaned it the best we are able, but it does not seem to make a connection. The last picture shows the plastic battery holder. This set comes with one each of the following Modumeters: Conductivity, Oxygen, Ion Concentration, PH. There are close ups of the information labels in the pictures. We are not able to evaluate the Modumeters. We are not able to test this unit further. It may need sensor replacements and calibration. It only comes with what is shown in the pictures. WF E9-8 d 80106218