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B. 

drift from trace contaminants or absorption from atmospheric gasses, so

1. Ensure pH protective cap is secure to avoid contamination.
 
 
4. Press key; use best reading.
NOTE: If reading is lower than 10 kilohms display will be dashes:
[ - - - - ]. Use Conductivity.
C. 
 
 
with sample to be measured. Shake out each sample to
remove any residual liquid.
 
4. Press .
 
6. IMPORTANT:
pH Sensor Storage Solution and replace protective cap.
If Myron L pH Sensor Storage Solution is unavailable, use a
strong KCl solution, a pH 4 buffer, or a saturated solution of



D. 
 
 
measured. Shake out each sample to remove any residual liquid.
 
4. Press .
 
NOTE:

Or