Sample Measurement; Ph Measurement; Mv Measurement; Temperature Measurement - OHAUS STARTER 3100 Instruction Manual


The meter reaches endpoint according to the endpoint mode, the calibration point pH value
(e.g. 4.01) with the temperature display on the screen.
The 2-point calibration is finished, now we have 3 choices to do next:

Press button-Cal to do the 3-point calibration.

Press button-Read to store the 2-point calibration and exit, the offset and slope are shown
on the display for 3 seconds then return to the measurement screen.

Press button-Exit to reject the calibration, return to the measurement screen.
Note: The use of a temperature electrode or an electrode with a built-in temperature sensor (3-in-
1 pH electrode) is recommended. If you use the MTC mode, you should enter the correct
temperature value and keep all buffer and sample solutions at the set temperature. (See 4.2)
3.2

Sample measurement

3.2.1

pH measurement


Place the pH electrode in the sample.

Press button-Read to start the pH measurement,
during measurement.

When meter reaches endpoint, the pH value with the temperature display on the screen.
3.2.2

mV measurement


Press button-Mode to switch between pH measurement mode and mV measurement
mode.

Follow the same procedure as for pH measurement to perform mV measurement.
3.3

Temperature measurement

For better accuracy, we recommend to use either a built-in or a separate temperature electrode.

If a temperature electrode is used, ATC and the sample temperature are displayed.

If the meter does not detect a temperature electrode, it automatically switches to the manual
temperature compensation mode and MTC appears. MTC temperature should be set.
Note: STARTER 3100 accepts NTC 30 kΩ temperature sensor. ATC (Auto Temperature
Compensation) or MTC (Manual Temperature Compensation) , the Temperature Compensation
only corrects for the change in the output of the electrode, not for the change in the actual solution.
That means the meter corrects the signal(mV) from the pH electrodes to get a more accuracy pH
value according to the real temperature.
appears on the display.
9
is blinking