Frequently Asked Questions Selby-Noack™ Volatility Test
- The dimensions of the instrument
(57 x 60 x 65.4 cm).
- A 120V plug and receptacle that
suits your facility. An external transformer may be used to convert 220V power
to 120V necessary for the instrument.
- A 15 Amp Dedicated Circuit.
- A reliable mass balance with
minimum capacity of 500 g and readability to 0.01 g. Make sure to use a separation device (cork
ring) between the Reaction Bottom/Cup and the balance to eliminate the effect
of the magnetism of the stir bar.
- Typically this unit is placed under an exhaust
snorkel due to the odor created by the volatility process of the instrument. It
is also possible to run ½” tubing to a snorkel or other ventilation system.
- Typical cleaning solvents, such as
Cyclohexane and VarClean.
suggest a stable room temperature (approximately 25˚C) with a humidity level up
to 60%. The most important point is for the room conditions to be stable.
Please see the Operation Manual shipped with your instrument for more information on the steps below.
an Inclined Manometer, perform a pressure calibration to ensure the
instrument’s vacuum is running at 2.0 cm water.
make sure the temperature and humidity of the lab are stable. Major
fluctuations in temperature and humidity may affect test results.
a Thermocouple Calibration at 250˚C to verify the Thermocouple is reading
temperature properly. If the Thermocouple is not reading correct
temperature, a calibration offset change may be necessary. Please contact
Tannas Technical Service for assistance.
the Orifice Tube depth to verify it is at the proper depth (11.4 cm from the
bottom of the Reaction Bottom/Cup).
the Coalescing Filter Housing is set up correctly with the flow in the proper
there are no pressure leaks in the system by performing a Leak Check.
sure to place a separation device (cork ring) between the Reaction Bottom/Cup
and the balance when weighing the sample because the stir magnet may alter the
mass balance measurements.
- Ensure the Reaction Bottom/Cup is completely
dry. Track each weight of the Reaction Bottom/Cup to ensure it is not
gaining weight over time. This can happen if solvent or oils buildup on the
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