Faktor Pembetulan

1
Faktor Pembetulan (Correction Factors)
dan (Pemeriksaan berkala) Intermediate
Checks 17 Oktober 2008
2
INTERMEDIATE CHECKS

• Equipment sent for external
  calibaration are as follows (but not limited to)
• Digital balance
• Pipette
• Biohazard cabin/Laminar flow/Fume hood
• Thermal cycler
• ELISA reader
• Spectrophotometer
• Digital thermometer (thermocouple thermometer)
• others

3

• Upon receiving equipment after calibration, PYB
  will inspect and verify that the calibration has
  been successful.
• Note on the calibration certificate the
  expire date of the calibration is stated.
  Sometimes the next suggested date for calibration
  is stated.
• User use the equipment for research and
  consultation work.
• Throughout the duration of using the equipment
  until the next calibration date is due -- user
  will need to perform INTERMEDIATE CHECKS
  (Pemeriksaan Berkala)

4
Calibration (tentukur)
Int. checks
Int. checks
Int. checks
Calibration (tentukur)
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WHY?

• to maintain the confidence in the calibration
  status (to ensure the continued accuracy)

6
WHEN?

• There is no rule in determining the intermediate
  checks interval of an equipment.
• Experience of user and other users
• Frequency of usage (more checks required if
  intensive use)
• Advise from manufacturer

7
HOW?

• Eg Balance
• Get standard weights
• Weigh the weights and record readings
• Complete form UPM/TNCPI/S/P)04/LV/BR2 (???)
• Verify the equipment is still within the accepted
  limit
• Eg micropipette
• Perform internal calibration

8
What to do next?

• If the intermediate checks results are
  satisfactory
• Continue to use equipment
• Perform next intermediate check until calibration
  date is due
• If the intermediate checks results are
  unsatisfactory
• Label the equipment not fit for use
• Send the equipment for calibration

9
Control charts

• Control chart is useful to monitor or do
  intermediate checks for certain equipment eg.
  Fridge, incubator
• Plot the daily/weekly temperature on a graph
  able to show the fluctuation of the data

10
Correction Factor

• When user receives the calibration certificate or
  after internal calibration take note of the
  errors in the readings.
• These errors will need to be incorporated (added)
  to the actual reading of the measuring equipment.

11

• Correction Factor the difference in the
  Observed equipment and the traceable equipment
• Correction Factor reading of the traceable
  equipment - current reading of equipment
• True reading current reading of the equipment
  correction factor

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• Example BALANCE
• If the balance calibration gives a 100.2g reading
  for a 100g standard weight, therefore the
  correction factor is - 0.2g.
• True reading current reading of the equipment
  correction factor
• True reading 100.2g (-0.2 g) 100g