Eppendorf LN2 Backup System - Manual (Page 27)

Maintenance
New Brunswick LN2 Back-up System
English (EN)
27
8.6 Maintenance forms
8.7 CO
2
/LN
2
back-up system service checklist
Period Place the task Task Personnel
Weekly Near device Clean with damp rag if
necessary. User
Weekly Near LN
2
supply Weigh LN
2
supplies to
see if they are full.
User
Monthly Near device Check for cuts or
abrasions on all electrical
wires. User
Inspect all hoses for cuts,
chaffing, and squashing.
Inspect hose connection
to bottle and seal
connection on the bottle.
There should be no
damage or corrosion.
Inspect manifold plugs
and seals. There should
be no mechanical
damage or corrosion.
Inspect LN
2
supply
connection and solenoid
valve connection. There
should be no damage or
corrosion.
Once every 5 years or
when battery fails Near device Replace battery. Qualified service
engineer
NOTICE!
 Service should check the following points.
 Refer to user manual sections as indicated.
1. Check Back-up system components for wear and any damage.
2. Check system and gas supply installation (see LN
2
gas supply installation on p. 18).
3. Check system connections for leaks (see Test for gas leaks on p. 18).
4. Test the injector valve operation (see Testing the solenoid valve on p. 21).
5. Test the door switch operation (see Testing door switch on p. 21).
6. Test overall system operation (see Testing back-up system operation on p. 22).