Accumet XL 20, Руководство пользователя

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102
TDS Setup
XL20, 30, 50 and 60 meters
To Select Cell Constant
This setup option allows you to select the appropriate cell constant of
the cell that you are using. There are three cell constants to choose
from. Each is used for a different range of TDS.
The TDS Cell Constant is set the same way as previously described
in Conductivity Setup. See
‘Conductivity Setup: Stable
Indicator/Auto Read Mode/Cell Constant’ section for instructions.
To Set TDS Factor
A TDS conversion factor is needed when a solution does not have a similar ionic content to
natural water or salt water. The TDS conversion factor automatically adjusts the reading.
The TDS conversion factor can be set from 0.40 to 1.00.
To set TDS Factor
1. Touch the TDS Factor box and use the numeric keypad to enter the desired default
temperature (0.40 to 1.00).
2. Press Enter in the keypad to return to TDS Setup screen.
To Set Default Temperature
TDS is a temperature dependent measurement. This option allows you to select a default
temperature that the meter will use along with the temperature coefficient to calculate a
temperature corrected TDS measurement. If an ATC probe is used any value entered as a
default temperature will be overridden in favor of the actual measured temperature of the solution
provided to the meter by the ATC probe.
The default temperature can be set from -10°C to 110°C.
The TDS Default Temperature is set the same way as previously described in Conductivity Setup.
See
‘Conductivity Setup: Select Reference Temperature’ section for instructions.
To Set Reference Temperature
This setup option allows you to select the reference temperature to be used in the determination
of the TDS of your sample. The reference temperature is the temperature to which the TDS
readings would be normalized.
The reference temperature can be set from 15°C to 30°C.
The TDS Reference Temperature is set the same way as previously described in Conductivity
Setup. See
‘Conductivity Setup: Select Reference Temperature’ section for instructions.
When you change
cell constants your
calibration factor will
automatically reset to
default values. It is
recommended that
you standardize your
meter to establish a
new calibration factor.