OPERATION ,CLEANING, CALIBRATION AND MAINTENANCE OF INFRARED MOISTURE ANALYSER

OPERATION , CLEANING, CALIBRATION, AND MAINTENANCE OF INFRARED MOISTURE ANALYSER

1) PURPOSE :   To describe the method of Operation, Cleaning, Calibration and Maintenance of an Infrared (IR) Moisture Analyser

2) SCOPE : This SOP is applicable for the Operation, Cleaning, Calibration and  Maintenance of IR moisture analyser Make Ohaus, Model-MB23,Capacity 110 g ,Accuracy 0.001% having Temperature Range 500C to 1600C  installed in the QC department

 3) FREQUENCY :

  • Operation :         As and when required
  • Cleaning  :           Daily before & after  operation
  • Calibration :         Daily for balance & yearly for temperature sensor
  • Maintenance :     As and when required, mainly during break down

4) RESPONSIBILITY : Executive QC, Officer QC

5) EQUIPMENT /MATERIALS REQUIRED : IR Moisture Balance, Clean spatula, Certified Calibration weights, Clean Mortar & Pestle, Clean & Dry Brush.

6) PRECAUTIONS :

  • Avoid the unnecessary burning of IR lamp.
  • Do not handle the moisture analyser roughly.
  • Adjust the spirit levels by using levelling screws of the balance.
  • Use voltage stabiliser.
  • Do not weigh the magnetized samples.

 7) PROCEDURE :

  • Operation :
  • Switch “ON” the mains.
  • Check the spirit level of IR Moisture Analyser.
  • Press the POWER/BRK’ key to display grams, now the machine is in the measurement mode and is ready to measure the sample.
  • Press “TARE” and wait till 0.000 appears on the LCD.
  • Crush the sample in mortal for uniform granules & add the1.00 gm sample.
  • Note the weight of the sample displays on the LCD.
  • Spread the sample uniformly such that it has thickness about 1 mm.
  • After completion of the drying the results appear on the LCD as percentage.

8) Cleaning :

  • Wipe all the traces of organic solvent/water /moisture by tissue paper.
  • Clean all the dust from the pan by tissue paper.
  • Cover the instrument by PVC cover
  • Calibration :
  • Calibrate the IR moisture balance with certified weight once daily.
Sr. No.Standard Weight in gmTolerance
1.200 g199.800  –  200.200 g
2.100 g99.900  –  100.100 g
3.50 g49.950  – 50.050 g
4.20 g19.980  – 20.020 g
5.10 g9.990  –  10.010 g
6.5 g4.995  –  5.005 g
7.2 g1.998  –  2.002 g
8.1 g0.999  –  1.001 g
9.0.5 g0.499  –  0.501 g
10.0.2 g0.199  –  0.201 g
11.0.1 g0.099  –  0.101 g
12.0.05 g0.049  – 0.051 g
13.0.02 g0.019  –  0.021 g
  • Calibrate the temperature sensor by outside authorised agency once in a year.
  • Moisture value of sample (Di- Sodium Tartrate)
Sr no.Sample  weight (Disodium tartrateTemp ⁰CTime in minMoisture Value(%M)Acceptance criteria 15.0 to 16.0 % w/wRemarks satisfactory/unsatisfactory
1.1.0 g150 ⁰CAuto mode15.0-16.0 %
2.1.0 g150 ⁰CAuto mode15.0-16.0 %
3.1.0 g150 ⁰CAuto mode15.0-16.0 %
4.1.0 g150 ⁰CAuto mode15.0-16.0 %
5.1.0 g150 ⁰CAuto mode15.0-16.0 %

 

9)Maintenance :

If there is any breakdown, contact to the maintenance department for minor

If there are major faults, contact to authorised service engineers.

10) ENCLOSURE :

Calibration record of Infrared Moisture Analyser :

Daily logbook of Infrared Moisture Analyser :

11) DISTRIBUTION LIST :

SR. NO.DEPARTMENT
1.QUALITY ASSURANCE
2.QUALITY CONTROL