Biobase BSC-4FA2-HA, Руководство пользователя, Страница: 26 / 39

24
of operating area) and the inner surface of glass door with 70
﹪
medical alcohol.
c. Check the various functions of equipment;
d. Record this maintenance result;
3) Annual maintenance
a. Check the two conveyor belts of front window drive unit and ensure that their tightness is
coincident.
b. Check the fluorescent lamps.
c. Apply for testing the overall performance of cabinet on an annual basis to ensure the
performance safety. User is responsible for testing costs.
d. Record this maintenance result.
4.5.5 Storage conditions
Safety cabinet should be stored in a relative humidity no more than 75%, the temperature is below
40℃, in the warehouse with good ventilation performance, no acid, no alkali and no other corrosive
gases, storage period shall not exceed one year, safety cabinet for more than a year needs to
unpacked and checked. Only the tested and qualified safety cabinet can be sold.
4.6 Methods and procedures for disinfection
Disinfection is necessary when any contaminated part of the Microbiological Safety Cabinet needed
for routine maintenance, replacement filters, and performance testing, etc. Before doing certification
test and gas sterilization, all internal working surface and the exposed outer surface should be
disinfected with a suitable disinfectant. Besides, before doing certificate test, please use the
biological safety level 2 designated agents, in the form of gaseous state to entire safety cabinet to
ensure the disinfection is in line with the requirements. When the safety cabinet has been used, it is
recommended to use the biological safety level 3 designated agents. It should be disinfected first
while the cabinet with the potential hazard of contamination move the place. In addition, if the
reagents are overflowed and spilled after the experiment, the contaminated surface should be
properly disinfected. Please use the depolymerization of paraformaldehyde as a disinfectant on the
occasion stated below, while most time use the gas. Before disinfection by other methods, the cycle
parameters and the validity of these parameters must be given for each model and size. The
compatibility of materials and the degradation and absorption of the alternatives are the key factors
to maintain the integrity of the safety cabinet and the time required for disinfection. There are some
cases need to use these alternative methods, e.g. slow virus disease. The disinfection methods should
be negotiated by the users and the authentication institution. When use paraformaldehyde for air
disinfection, it is necessary to point out the area of regulation, the gas masks, protective facilities, the
corresponding testing, medical monitoring, hazards training, record keeping and according to the
following steps:
Before disinfection, all hydrogen chloride must be removed from the safety cabinet.
Hydrogen chloride in the presence of formaldehyde in the air will form a carcinogen two
chloromethyl ether (BCME) with the environment condition.
a
、
Multiply the height, width and depth to calculate the total volume of the safety cabinet
b
、
Safety cabinet total volume multiplied by 11g/m3, to determine the required quality of
paraformaldehyde. To confirm the quantity of ammonium hydrogen carbonate or its substitute
according to the stoichiometric method and provide ammonia and formaldehyde with