during a lube oil analysis what is a Rbot test?

Answer 1

Apparently it is a sampling of hydraulic fluid to check for thermal failure. Excessvie heat can cause a fine silt build up in the oil oxidations stability issues and thermal failure.

Here is more info. BTW Rbot testing is also known as RPVOT see below.

The RBOT procedure employs severe oxidation conditions to rapidly determine oxidation stability. Suitable for both new and in-service oils, the RBOT method is applicable to many types of petroleum oils. The sample is oxidized in the presence of water and a copper catalyst in a stainless steel pressure vessel under an initial pressure of 90psi (620kPa). Pressure inside the vessel is recorded electronically or mechanically while the vessel is rotated at 100rpm at constant temperature, and the amount of time required for a specified drop in pressure is the oxidation stability of the sample. A variation of the RBOT method is the “Thin Film Oxidation Uptake Test” (TFOUT) for gasoline automotive engine oils.

Features and Benefits
• Electronic pressure measurement systems exclusively designed for RPVOT (formerly RBOT), TFOUT and other ASTM oxidation test methods

• Automatic end-point detection for RPVOT (formerly RBOT), TFOUT, and D525 test methods

• Powerful software system for PC platforms operating in Windows ® 98 SE, 2000, NT, ME, and XP environments

• Monitors up to twelve pressure channels and four temperature channels

• Displays average bath temperature and pressure readings in real-time

• Readily installed on most manufacturer’s test apparatus

Hope this helps.

Answer 2

The RBOT procedure employs severe oxidation conditions to rapidly determine oxidation stability. Suitable for both new and in-service oils, the RBOT method is applicable to many types of petroleum oils. The sample is oxidized in the presence of water and a copper catalyst in a stainless steel pressure vessel under an initial pressure of 90psi (620kPa). Pressure inside the vessel is recorded electronically or mechanically while the vessel is rotated at 100rpm at constant temperature, and the amount of time required for a specified drop in pressure is the oxidation stability of the sample. A variation of the RBOT method is the “Thin Film Oxidation Uptake Test” (TFOUT) for gasoline automotive engine oils.