SOP for Operating the COD Digestor Apparatus.

1.0     Objective:

        The objective of this Standard Operating Procedure is to lay down the procedure for Operating the COD Digestion Apparatus.

2.0        Scope:

        This SOP covers operating procedure of COD Digestion Apparatus .

3.0         Responsibility:

              Junior Research officer, Research Officer: Responsible for operation of the apparatus as   per procedure.

         QA Officer/QA Manager: Review the records and governing the document.

4.0          Procedure:

4.1       Connect the instrument and switch on by means of Toggle Switch which is at the right side of the instrument.

4.2       Set the temperature at 150 º C & Time (2 hrs.) with the help of SET button by adjusting COURSE and FINE knob.

4.3     The temperature will start rising and RED light will indicate heating in progress. After initial overshoot, temperature will stabilize at set temperature indicating Red light cycling ON / OFF When the temperature reaches 150º C, insert the reaction vessels containing sample and reagents into the digestion block and keep the air condensers on each vessel.

           (Ensure that there is no Water / Chemicals spillage).

4.4    Set the timer for desired time. For COD Analysis, set time for 2 hours. Switch on the Toggle Switch. When Toggle Switch is ON Red L.E.D. will glow.

4.5    The Buzzer will sound after the set time and Red L.E.D. will be off. Then switch OFF the Toggle Switch.

4.6        Remove the glassware and carry out analysis.

4.7  If no further samples are to be digested, Simply off the Instrument.

5.0       Care and Handling:

5.1       Ensure proper earthing and proper supply of Voltage.

5.2       Always use correct rating fuse. (5 A)

5.3       No chemicals should be split on the block.

5.4       The glassware must be free from any water droplets on the outer surface as it may cause crack.

5.5  In case of accidental breakage, switch off the power immediately.

6.0       Documentation:

     Annexure 1 Usage logbook                            XXX/FRM/000

7.0       History of Revision:

Revision No.	Effective Date	Revision details	Reason for revision

Annexure - 1
Date	Booking No.	Name of sample	Remark	Sign
SOP No. : XXX/SOP/000-00                                           Format No. : XXX/FRM/000-00