Hach CDC401 Series, Руководство пользователя

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• The meter can show the measured value as conductivity, TDS (total dissolved solids), salinity or
resistivity. Use the probe settings menu to change the parameter.
• If the probe is used to measure the salinity value for dissolved oxygen measurements, change the
parameter to salinity.
• The conductivity value changes with temperature. The default probe settings apply a temperature
correction to adjust the conductivity measurements to the value at 25 °C.
• The meter automatically saves the measurement data when the user manually reads each data
point and when the meter is set to read at regular intervals. The user must manually save each
data point when the meter is set to read continuously.
• Air bubbles below the sensor can cause a slow response or error in the measurement. Make sure
to remove air bubbles before and during measurements.
• If the probe is a rugged type, make sure to install the shroud before field use to prevent damage to
the sensing elements. Refer to Remove or install the shroud on page 9. The probe warranty
does not include such damage.
• To deploy a rugged probe at a distance, toss the probe body with a slow underhand throw. Do not
throw the probe by the cable to prevent damage to cable, the probe or the user.
6.2 Sample measurement procedure
1. Rinse the probe
with deionized water.
Dry the probe with a
lint-free cloth.
Rugged probes:
install the shroud.
2. Put the probe in
the sample with the
sensor fully in the
sample. Do not put
the probe on the
bottom or sides of
the beaker.
3. Shake the probe
from side to side to
remove air bubbles.
Rugged probes:
move the probe up
and down to remove
air bubbles.
4. Stir gently, then
read the conductivity
(or TDS, salinity,
resistivity) value of
the sample. The
display shows the
temperature-
corrected value
when the reading is
stable.
Section 7 Verify the calibration
Measure the value of a fresh conductivity standard solution to make sure the result is accurate. The
meter compares the selected standard solution value to the measured value and accepts or rejects
the measurement. The user can change the standard solution and acceptance criteria for verification
in the probe-specific settings.
Note: Password protection may prevent access to the acceptance criteria.
English 7