OHAUS ST300D-B, Инструкция по эксплуатации

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STARTER 300C Portable Conductivity Meter EN
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Be sure the conductivity electrode is securely attached to the meter and place it in the defined
calibration standard, wait 10-15s, and press .
The calibration icon and the measurement icon appear on the display. The measurement
icon is blinking during calibration measurement. The meter reaches the end points according to
the preselected endpoint mode .
When the calibration is finished, the standard value is displayed and stored; the measurement
icon blinks 3 times and disappears. Then, the endpoint stability and auto endpoint icon
blinks 3 times and freezes on the display. If the calibration was ended manually (by pressing
), then only endpoint stability icon blinks 3 times and freezes on the display.
To finish the calibration and return to the sample measurement, press . The cell constant is
then shown on the display for 3 seconds.
To reject the calibration, press before the meter returns automatically to the measurement
screen.
Note:
To ensure the most accurate conductivity readings, you should verify your cell constant with a
standard solution before measurement and recalibrate if necessary. Always use fresh standards.
For STCON3 the normal cell constant range is 1.50 – 2.00. (e.g. 1.71 /cm) if the cell constant is
outside the range due to an improper calibration, you may need to recover factory settings (see
5.4) , then repeat calibration.
4.2 Sample measurement
Place the conductivity electrode in the sample, wait 10-15 seconds, then press to start the
measurement. The measurement icon appears on the display. The measurement icon is
blinking during measurement and the display shows the conductivity value of the sample. When
measurement reading reaches endpoints (auto endpoint or manual endpoint); you can record the
endpoint reading result.
By pressing and holding , you can switch between the auto and manual endpoint modes.
Stability criterion for conductivity measurement: The sensor input signal of the meter may not
change by more than 0.4% from the measured average conductivity of the probe in 6 seconds.
4.3 TDS measurement
To perform a TDS measurement, follow the same procedure as for a conductivity measurement.
Press to switch between conductivity and TDS measurement mode.
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