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SBS-2500 Manual 09-15-TI2500
7.2 Adjusting the Measuring Cell with a Density Standard
If a different density range is to be used, the measuring cell can be adjusted using a density standard of your choice
(e.g. toluene from the NIST, National Institute of Standards and Technology) instead of distilled water.
Setting in the Menu
•
Calib. Mode: On
•
Enter the following density standard values into the menu:
Density Density of the density standard (g/cm
3
) at the reference temperature
Temp
Reference temperature
α x 1000 Temperature-compensation coefficient of the density standard • 1000
Adjusting
•
Ensure that the measuring cell and sample tube are clean.
•
Fill the clean measuring cell with the density standard (e.g. Toluene) ensuring that no bubbles are allowed to
enter.
•
Press and hold the up and down keys simultaneously until
CALIB (STD)
appears in the display.
The instrument adjusts automatically (duration: approx. 1 minute). After adjustment is completed, the measured
deviation from the theoretical value and
Execute? (
No
)
appears.
Measured Deviation <0.001
Press the
or
key.
Execute? (
Yes
)
appears.
- Press the
“ok/meas.”
key to confirm.
The adjustment is confirmed.
Measured deviation ≥ 0.001
•
Check whether the measuring cell is dirty and if there are air bubbles.
Measuring cell is clean and contains no air bubbles:
•
Press the
or
key.
Execute? (
Yes
)
appears.
•
Press the
“ok/meas.”
key.
Measuring cell is dirty and/or contains air bubbles:
•
Execute? (
No
)
is confirmed by pressing the
“ok/meas.”
button.
•
Clean the cell if necessary and readjust.
7.3 Adjusting the Measuring Cell with Air
The SBS-2500 measures with the specified accuracy if the measuring cell is correctly adjusted with the
accompanying density standard or distilled water.
Additional adjustment with air is generally not necessary, but is recommended when:
•
The measuring cell is replaced,
•
The displayed density of air is < 0.0007 g/cm
3
or > 0.0015 g/cm
3
.
