Calibration and validation , ph meter and weigh balance calibration SOPs procedure with difference and frequency of doing this hope this will be helpful for you... also comment if needed

1. CALIBRATION AND VALIDATION
Divy M. patel

2. .
Calibration
In measurement technology and
metrology, calibration is the comparison
of measurement values delivered by a
device under test with those of a
calibration standard of known accuracy.

3. VALIDATION
Validation is the process of establishing
documentary evidence demonstrating that a
procedure, process, or activity carried out in
testing and then production maintains the desired
level of compliance at all stages

4. DIFFERENCE BETWEEN BOTH
Calibration ensures that instrument or measuring
devices producing accurate results.Validation provides
documented evidence that a process, equipment,
method or system produces consistent results (in
other words, it ensures that uniforms batches are
produced)

5. PH METER CALIBRATION
 pH meter calibration is a necessary step of using a pH meter
because of how the electrode changes over time.Your pH
electrode is designed to measure pH based off of slope and
offset (the Nernst Equation)
 All pH meters require calibration and should be calibrated
anywhere from before every use to at least once a month.

6. PROCEDURE
 CalibratingYour pH Meter. Place your electrode in the buffer
with a pH value of 7 and begin reading. Press the “measure”
or calibrate button to begin reading the pH once your
electrode is placed in the buffer. Allow the pH reading to
stabilize before letting it sit for approximately 1-2 minutes.

7. CALIBRATION OF WEIGHING BALANCE
Calibration is crucial to increasing a weighing scale or
balance's longevity. It is also a necessary process to
ensure valid data during rigorous testing.
Calibration of the reference weights is performed
every two years by an ISO 17025 accredited vendor.
Internal calibration daily , and predcision once a
month

8. PROCEDURE
 Place 5 gm of weighing pan
 Note the weight
 Calculate the weight difference
 Repeat the above steps using 50 gm and 100 gm
 Record the weight by noting down in form
 And for precision place 5 gm pan and repeat this 9 times
 And note the results.

9. THANKYOU !...
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