Thermo Scientific Russell RL060P, User Manual

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Thermo Scientific Russell RL060P pH Meter User Guide
Chapter III
Calibration
pH Calibration
The .meter .is .capable .of .calibrating .up .to .three .points .using .USA .or .NIST .(nSt) .pH .
buffer .standards .or .two .points .with .low .ionic .strength .(Pb) .pH .buffer .standard . . .All .
new .calibration .values .will .automatically .override .existing .data . .
USA pH 4.01, 7.00 and 10.01
NIST pH .4 .01, .6 .86 .and .9 .18
Pb pH .4 .10 .and .6 .97
It .is .recommended .that .you .perform .at .least .a . .two .point .calibration .at .room .
temperature .(25 .˚C) .using .standard .buffers, .starting .with .the .first .buffer .at .pH .7 .00 .
(USA), .pH .6 .86 .(NIST) .or .pH .6 .97 .(Pb) .followed .by .other .buffer .values . .
A .one .point .calibration .should .be .performed .with .a .pH .buffer .value .closest .to .the .
expected .sample .value .being .measured . .Otherwise .calibrating .at .pH .7 .00, .pH .6 .86 .or .
pH .6 .97 .is .advisable .
The .meter .has .automatic .buffer .recognition .that .identifies .the .correct .pH .buffer .values .
during .calibration . .If .non-standard .pH .buffers .other .than .the .above .standards .are .
used, .or .the .electrode .has .worn .out, .the .LCD .will .flash .“
Er1
” . .Press .the . .to .abort .
calibration .and .resume .measurement . .In .general .all .pH .buffer .values .have .the .window .
of .up .to .± .1 .pH .tolerance .during .calibration .
Ensure .that .you .use .new .pH .buffer .solutions .or .sachets .during .calibration . .Do .not .
reuse .buffer .solutions .as .it .may .be .contaminated .and .affect .the .calibration .and .
accuracy .of .measurements . .Always .store .buffer .solutions .in .a .dry, .cool .environment . . .
Before .use, .remove .the .plastic .protective .cap .of .pH .electrode .and .condition .the .glass .
bulb .by .soaking .it .in .tap .water .for .1-2 .hours . .This .hydrates .the .glass .bulb .if .electrode .
is .too .dry .or .has .not .been .used .for .a .long .period .of .time . .Always .rinse .the .probes .with .
tap .water .or .rinse .solution .before .and .after .each .calibration/sample .measurement .
to .avoid .cross-contamination . .For .details .refer .to .
Chapter V, Electrode Care and
Maintenance . .