OHAUS ST300D-B Manuel D'instructions page 15

STARTER 300D Portable DO Meter
4.2 Sample measurement
Dissolved oxygen readings can display unit of ppm, mg/L or %. You have the option of choosing
the unit according your application by pressing button-
When measuring the sample, please note:
The sample must be stirred
o
Be sure the minimum water flow rate is 5 cm/second across the electrode membrane.
o
Then
Place the DO electrode in the sample.

Press to start the measurement.

The measurement icon
measurement. When the meter reaches its endpoint, the measurement result displays on the
screen.
4.3 Temperature measurement
For better accuracy, we recommend the use of the temperature probe. If a temperature probe is
used, ATC and the sample temperature are displayed.
If the meter does not detect a temperature probe, it automatically switches to the manual
temperature compensation mode and MTC appears. MTC temperature should be set. (See 3.3)
Note: The meter will only accept NTC 30 kΩ temperature sensor.
4.4 Using the memory
4.4.1
Storing a reading
The STARTER 300D can store up to 30 results. Press button-
its final reading. M01 indicates that one result has been stored.
If you press button-
data you will have to clear the memory (see 4.4.3).
appears on the display. The measurement icon
when M30 is displayed, FUL indicates the memory is full. To store further
when on the measurement screen.
when the measurement reaches
EN-11
is blinking during