LaMotte 5 Series pH Meter - Manual (Page 12)

12
5. Allow the reading to stabilize. Press the ENTER key to confi rm
the calibration. “CO” will be displayed momentarily before
reverting to the pH measurement mode.
6. For the greatest accuracy, perform a multiple-point calibration.
Repeat step 1 with additional pH buffer calibration standard
solutions.
3.1.2 Changing the pH Buffer Group
The meter can be calibrated with pH standards of USA, NIST (nSt) or
Low Ionic (Pb) pH buffer groups. The factory default is the USA buffer
group. To abort the buffer group selection, press CAL to revert to the pH
measurement mode.
1. Press and hold MODE while switching the meter on using the
ON/OFF key. The display will show “bUF” blinking.
2. Press the ENTER key to begin the buffer group selection mode.
Use the MODE key to toggle between USA, NIST or Pb as
shown below.
Press the ENTER key to confi rm the selection. The meter will
automatically revert to the pH measurement mode. The meter will save
the selected group indefi nitely until it is changed.