Page 23 - Feed Lab

Lab Equipments Maintenance & Handling Procedure Suguna Management System Ver 1.0 / SOP / FQL / P1 - 02 Page 3 of 6

Muffle furnaces: An electrically heated furnace of FIn case of power outage, turn off or unplug
muffle form should be available in every well-equipped equipment to prevent damage; if fumes are present
laboratory. The maximum temperature should be about close appropriate hood and doors. Evacuate if
o
1200 C. If possible, a thermocouple and indicating necessary.
pyrometer should be provided; otherwise the ammeter FDo not use any electrical appliance or piece of
in the circuit should be calibrated, and chart
constructed showing ammeter and corresponding equipment that will exceed the rated amperage of
temperature readings. the intended circuit. Remember that any other
appliance on that circuit will also need to be
Heating Mantles: These consist of a flexible `knitted` considered when calculating the total number of
fiberglass sheath, which fits snugly around a flask and amps to be drawn. If you are uncertain about the
contains an electrical heating element, which operates rated amps for a given circuit, request your
at black heat. The mantle may be supported in an supervisor to ask for assistance from appropriate
aluminum case, which stands on the bench, but for maintenance staff.
use with suspected vessels the mantle is supplied
without case. Electric power is supplied to the heating FIf, during the course of an experiment, a circuit
breaker trips, turn off all electrical appliances on that
element through a control unit, which may be either a circuit and notify your supervisor.
continuously variable transformer and so the operating
temperature of the mantle can be smoothly adjusted. FWhen using multiple outlet plugs for electrical
Heating mantle is designed for the heating of flask and outlets, use caution not to exceed the rated
finds wide application in distillation operations. amperage of the circuit. The device should have its
own circuit breaker. If you reach a point of an
insufficient number of outlets, it is time to have the
Attention:
FDo not use electrical equipment if not in good circuit load evaluated.
working order. Check for frayed or damaged power
cords or broken control switches. GAS CYLINDERS
FEnsure the cap is firmly in place when storing or
FLocal electrical safety testing to be undertaken at moving a cylinder. (This protects the valve stem
specified regular intervals (generally once a year)
from being accidentally broken off.) Move gas
FAvoid all contact with water when using electrical cylinders with an appropriate hand-truck. The
equipment. protective cap must be in place before the cylinder
is released from its support.
FUse grounded outlets with circuit breakers only. No
extension cords. FAlways support gas cylinders by straps, chains or a
suitable stand to prevent them from falling over.
FEnsure that instruments used in series are of the
same voltage. FClose all cylinders and bench valves when not in
use.
FEnsure that main power switch is "OFF" and
instrument unplugged before servicing, if possible. FEnsure that the appropriate regulator is used on
each gas cylinder.
FNever by-pass any safety device.
FNever use a cylinder that cannot be positively
FDo not use electrical equipment such as mixers or identified as to its content.
hot plates around flammable solvents.
FNever force a cylinder valve.
FUse only carbon dioxide or dry powder
extinguishers in case of fire in or near electrical FNever use oil or grease on a regulator or tank valve.
equipment.
FDo not use a regulator or tank if oil or grease is
present with oxygen or other oxidant. Combustible

Prepared by : Approved by :
13 Director - Technical