1.0 OBJECTIVE:
To
lay down the operating procedure of Abbe’s Refractometer.
2.0 SCOPE:
This
shall be applicable to the Abbe’s
Refractometer of Quality Control Instrument Laboratory.
3.0 RESPONSIBILITY:
3.1
Technical
Assistant/ Helper.
3.2
Q.C Analyst.
4.0 ACCOUNTABILITY:
4.1
Manager-Quality
Control.
5.0 MATERIAL AND
EQUIPMENT:
5.1
Abbe’s Refractometer.
6.0 PROCEDURE:
6.1
Ensure that the
instrument is clean. Follow the SOP.
6.2 Ensure
that all the parts including eye lens, prisms and mirror are clean before
operation.
6.3 Place
the instrument on a table where adequate light can be reflected through the
mirror.
6.4 Open
the prism lock and place few drops of liquid testing sample at the temperature
specified.
6.5 Allow
the liquid to smear on the lower prism surface quickly close the prism lock.
6.6 Adjust
the eye piece cross wire with a knob by rotating it in a clockwise or
anti-clockwise direction so that the sharp demarcation line passes through its
center.
6.7 Sharp
demarcation is produced in the form of a circle having half-light &
half-dark portion.
6.8 A
knob provided just above the prism can do fine adjustment.
6.9 Note
down the reading from the scale with the help of the magnified lens of the
instrument.
6.10 Use
thermometer and water jacket with tubes provided in the instrument whenever it
is required.
6.11 Clean
the instrument and keep under box when not in use.
7.0 REVISION LOG:
|
Revision No.
|
Effective Date
|
Reason
|
|
00
|
|
New
SOP
|
8.0 REFERENCES:
8.1
Not Applicable.
9.0 ANNEXURES:
9.1
Not Applicable.
10.0
ABBREVIATIONS:
|
Abbreviation
|
Expanded Form
|
|
SOP
|
Standard operating
procedure
|
|
&
|
And
|
|
No.
|
Number
|
|
Ltd.
|
Limited
|
|
Q.C
|
Quality control
|
|
QCEO
|
Quality control
equipment operation
|
|
F
|
Format
|