PROCEDURE FOR CALIBRATION OF DOSING PUMPS NaOCl, SMBS, ANTISCALENT AND NaOH

• PROCEDURE:

• Dosing pumps shall be calibrated by measuring the output quantity of solution in particular time at different % of flow shown on the pump.
• Before starting the calibration, keep ready calibrated timer and measuring cylinder.
• Stop the Pre-treatment, RO-I and UV-I system before starting of the calibration of the pumps.
• Stop the Dosing pump by operating the Switch ON/OFF and labelled as under calibration.
• Disconnect the discharge pipe from the Service line.
• Set the % of flow at 100 and start the dosing pump by operating the Switch ON/OFF.
• Start the timer and kept the discharge in measuring cylinder.
• After 10 minutes stop the pump and record the result. Accordingly calculate the capacity for 1 hour. This shall be considered as 100 % capacity of the pump.
• Perform the calibration at 25%, 50% and 75% of flow and compare the results with the specifications according to the % of flow.
• If the results are within the limit of ± 5 %, the pump can be used for the operation.
• If the results are out of limit, the diaphragm of the pump shall be changed, and calibration is performed.
• Even though after changing the diaphragm, if it is not performing, the pump shall be changed, and calibration performed.
• After calibration completion it is labelled as calibrated. If it fails, labelled as calibration Failed.
• Switch ON the dosing pumps and start the Pre-treatment, RO-I and UV-I system.
• The calibration of dosing pumps shall be performed for quarterly along with the Quarterly preventive maintenance of purified water system.
• The grace period is followed as per the SOP.
• Record the dosing pumps calibration details as per Annexure-I.
• REFERENCES:
•   Not Applicable
• ANNEXURES: 

• ENCLOSURES: SOP Training Record.
• DISTRIBUTION:
• Controlled Copy No. 01                     Head Quality Assurance
• Controlled Copy No. 02                 Head-Engineering
• Master Copy                           Quality Assurance Department
• ABBREVIATIONS:
• RO                   :          Reverse Osmosis
• UF                   :          Ultra Filtration
• NaOcl              :          Sodium hypochlorite
• SMBS              :          Sodium Meta bi Sulphite
• NaOH              :          Sodium hydroxide
• SOP                 :          Standard Operating Procedure
• QA                   :          Quality Assurance
• REVISION HISTORY:
•  CHANGE HISTORY LOG

Annexure-I
DOSING PUMPS CALIBRATION RECORD