Thermo Orion Star, Руководство пользователя

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IX-3
Orion Star Series Meter
Thermo Electron Corporation
Conductivity Technique
• Conductivity Temperature Reference: By definition, temperature compensated
conductivity of a solution is the conductivity which that solution exhibits at the
reference temperature . The temperature is chosen to be either 25 ˚C, 20 ˚C,
or 15 ˚C . A measurement made at the reference temperature needs no
compensation . The closer the sample is to the reference temperature, the
smaller the error will be if the meter temperature coefficient is incorrect . The
meter automatically compensates for temperature changes based on the
temperature coefficient and the reference temperature when a temperature
measurement is simultaneously made .
• Conductivity Cell Type & Manual Ranging: This allows you to select a Standard
( ) cell where the conductivity plates are parallel to each other, or Planar
( ) where the conductivity plate are on the same plane . Almost all
conductivity cells are of the Standard arrangement . This also allows the user to
fix the meter in one range . This can be useful with extremely long cables where
cable capacitance could cause non-linearities due to the drive frequency change
between ranges .