Model 323 is a four test position heated AIR bath for measuring the foaming tendencies of lubricating oils in the temperature range of +20 to +150°C. The use of heated air to heat the test samples improves the overall safety by eliminating the use of the potentially unsafe, smoking, dripping of, flammable, hot liquid bath medium. Conventional bath fluids darken and require frequent replacement.
Model 323 uses a digital indicating (0.1°C resolution) PID controller for controlling the air temperature in the chamber, with a stability of better than ±0.5°C over the operating range. Novel, sophisticated heating system and control allows the sample to reach test temperature in less than the 60 minutes specified by the method. Long temperature probes are provided for each of the 4 test positions for digital control and test sample temperature display and precise temperature control during the foaming process.
An automated, two channel sequencer automatically starts the air flow after the 5 minutes soak time, after 5 minutes stops the air flow and sounds an alarm, and again sounds an alarm after the 10 minutes settling period (other times are also available).