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.
4.7 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.
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