18 ISSUE NO. V1.3 DATE 12/12/00
18
LOVIBOND PFX995/950
CALIBRATION PROCEDURE
Introduction
By following these instructions and using the calibration result sheet provided, the user can carry out regular
calibration of the PFX995/950 instrument.
This procedure verifies that the PFX995/950 is performing within its stated accuracy and precision. The
instrument has a stable measurement system that has no internal adjustments. The accuracy of the
instrument is however dependent on the cleanliness of the cell compartment and its optical windows and the
condition of the tungsten halogen lamp. Both of these should be maintained as described in the
maintenance section of this manual. The instrument must always be operated within the environmental
conditions stated in the Technical Specification.
Calibration Interval
The calibration interval is dependent upon the environment in which the instrument is operated. It is
recommended that calibrations are initially performed every three months. This interval can be extended as
confidence grows in the stability of the instrument in the particular operating environment.
Recording Results
The calibration results for the instrument may be recorded on the attached calibration result sheet.
Equipment Required
1) Certified conformance filter set.
2) Thermometer.
Test Procedure
Switch on the instrument.
Select the colour scale as indicated on the Certificate of Conformity supplied with the conformance filter set.
Place one of the filters in the instrument and press the read button.
Ensure that the displayed result is within the stated tolerance.
Repeat for the remaining filters in the set.
Complete the calibration test result sheet.
Equipment Labelling
Place a new calibration label on the instrument with the following details:
1) Calibration date
2) Next calibration due date
3) Signature
Calibration Results
The calibration results sheet should be maintained as a record of the instrument’s continued performance.
It is recommended that calibration results are maintained for a minimum of five years.
The conformance filter set should be returned to Tintometer Ltd annually for re-certification.
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