Performing 2-Point Calibration - OHAUS STARTER 2100 Instructions Manual

STARTER 2100 Bench pH Meters
Press button-

Press button-

Note: With the 1-point calibration only the offset is adjusted. If the pH electrode was previously
calibrated with 2-point calibration the previously stored slope will remain. Otherwise theoretical
100% slope (-59.16 mV / pH @25 °C) will be used.
4.1.3

Performing 2-point calibration

Perform 1-point calibration as described above.

Rinse the pH electrode with pure water and wipe off water with a tissue.

Place the electrode in the next calibration buffer stir and wait, then press button-

"Cal 2" displays on the top right of the screen and is blinking.
during calibration.
When reading is stable (normally the reading does not change in 5s), press button-

to lock the reading and finish 2-point calibration,
4.01 pH) with the temperature display on the screen.
The 2-point calibration is finished, now we have 2 options:
Press button-

display for 3 seconds then returns to the measurement screen.
Press button-

Note: The use of a temperature electrode (e.g. STTEMP30) or a pH 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 3.1)
to reject the calibration and return to the measurement screen.
to do the 2-point calibration.
to store the 2-point calibration, the offset and slope are shown on the
to reject the calibration and return to the measurement screen.
appears and is blinking
disappears. The buffer pH value (e.g.
EN-11
,