Thermo Fisher Scientific EcoScan pH/Ion 5 & 6 - Manual (Page 10)

Instruction Manual pH 5/6 & Ion 5/6
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3.2 Selection of pH buffer standards
You must set the meter to accept either USA, NIST (nSt) or Low Ionic (Pb) pH buffer
standard values before calibration. The factory default is USA standard. If you wish to
abort this operation press the CAL key at any sequence and the meter reverts to pH
measurement mode.
1. Press and hold the MODE key. Switch on the meter using ON key. The display
shows “bUF” blinking.
2. Press ENTER key to get into its buffer selection mode. Use the MODE key to toggle
between USA, NIST or Pb standards as shown.
3. Press ENTER key to confirm your choice of buffer standard to be used. The display
then reverts to pH measurement mode.
3.2.1 Resetting the User Calibrated Values
If you need to have a new set of Ion or pH measurements or mV offset (in pH 6) taken,
you may wish to reset the last Ion/pH/mV calibrated values. Note only temperature
offset (if set) will not be erased.
1. Press and hold the CAL key while switching on the meter using the ON key. The
LCD shows “rSt” blinking.
2. Press MODE key to abort this operation if you do not wish to reset.
3. Press ENTER key to confirm. The meter automatically clears all stored pH/Ion
calibration or mV offset values and reverts to measurement mode.