Digi Cell Plus - Digital Oil Test Cell Information Guide
7
GB
Principle of Operation
DIGI+ measures the pressure generated by a chemical reaction that takes place inside the closed sample cup. An oil
sample and reagents are put into the sample cup and DIGI+ is closed and shaken to aid the chemical reaction. The
pressure is proportional to the parameter to be measured. A very sensitive high-resolution pressure transducer is used to
convert pressure to an electrical signal which is then processed and displayed to the user.
Water (H
2
O) in Oil Measurement
Gas is generated from a chemical that reacts with available water in the sample. The water content is calculated from the
gas pressure in the sample cup.
Base Number of Oil Measurement
Gas is generated from a chemical that reacts with available (remaining) BN additive in the sample. Gas pressure in the
sample cup from used oil is compared to new oil as a ratio:
DIGI+ stores the value of pressure generated by new oil which is measured once and saved as a reference. DIGI+ can
save values for multiple new oils in its memory as OIL TYPES. Before used oil is measured, the new OIL TYPE must be
measured and stored as a calibration value.
• DIGI+ holds calibration data for up to 8 different OIL TYPES
• when using smart mode, DIGI+ holds calibration data separately for up to 10 different OIL TYPES
