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 the
ENTER
key to get into the buffer selection mode. Use the
MODE
key to toggle between USA, NIST or Pb standards as shown.
3.
Press the
ENTER
key to confirm the buffer standards to be used. The
display then reverts to pH measurement mode.
3.2.1 Resetting the User Calibrated Values
Note: only the 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 the
MODE
key to abort this operation if you do not wish to reset
3.
Press the
ENTER
key to confirm. The meter automatically clears all stored
pH/Ion calibration or mV offset values and reverts to measurement mode.
11
Содержание pHPLUS DIRECT
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