Muffle furnace, Purpose :
Muffle furnace, The purpose of this SOP (Standard Operating procedure) is to describe the operation and maintenance of Muffle furnace for the determination of Ash, Sulphated ash/residue on ignition and Loss on ignition and other tests (which required higher temperatures and furnace) of the materials under specified condition.
Muffle furnace, Scope :
This procedure is applicable for Muffle furnace (Model: Carbolite, CWF1200), installed in the quality control laboratory for general block of XX Pharmaceuticals Limited.
Definitions:
SOP: Standard Operating Procedure.
QC: Quality Control.
Responsibilities:
The roles and responsibility is as follows:
Executive, QC
[][]To ensure that the instructions of this procedure are correctly followed.
[][]To ensure cleaning of Muffle Furnace safety rules.
Manager, Quality Control
[][]To ensure that this procedure is kept up to date.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
[][]To arrange training on the SOP to all concerned personnel and to ensure implementation of the SOP after training.
Head of Quality Assurance
[][]To ensure the overall implementation of the SOP.
[][]Approval of the SOP.
Procedure:
Precaution(s):
[][]Do not open the door during operation of Muffle Furnace.
[][]Always wear vinyl/heat resistance gloves to put and to remove the crucible from the furnace using the long tongs.
[][]Ensure that heating elements are isolated from the door and the inner surface of the chamber.
Operation:
[][]Connect the instrument to the main power supply.
[][]Switch ‘ON’ the mains.
[][]Press “■” key button.
[][]Display will show SPºC.
[][]Use “▲” up or “▼” down arrow key button to set the required temperature.
[][]Press “■” key button.
[][]Then display will show SPrr.
[][]Use “▲” up or “▼” down arrow key button to set ram temperature.
[][]Press “■” key button.
[][]Display will show t S.
[][]Use “▲” up or “▼” down arrow key button to set the time (Hr:Min) by a single press.
[][]Machine will automatically increase the temperature according to ramp temperature.
[][]After reach the set temperature, machine will hold that temperature according to set time.
[][]Then display will show ‘End’.
[][]Switch OFF the instrument and mains.
Cleaning procedure:
[][]Insure that main power switch of the equipment is “OFF” position and at room temperature.
[][]Clean the outer surface of the furnace with a damp cloth.
[][]Clean the inner surfaces with dry cleaned cloth or soft nylon brush.
Maintenance:
[][]If Muffle furnace shows any mechanical, electrical or any others problem, inform to supplier or
[][]Engineering Department for maintenance.