CBS 2301 - Recommended Best Practices; Backup Alarm and Remote Connection; Sample Management and Logging; Contingency Planning

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Recommended Best Practices in the industry for safe sample storage
Secondary or backup alarm
It is strongly recommended to have, at a minimum, an Independent Temperature Alarm
for each LN2 freezer.
Remote alarm connection
It is strongly recommended to have, at a minimum, a Remote Auto Dialer connected to
your Delta Room, Facility Monitoring Station or Remote Auto Dialer for each LN2 freezer.
Split Samples
Separate samples in to two dierent freezers.
Keep a daily log
Track temperature levels daily.
Record ll intervals and amount of LN2 lled into vessel (manual or pour-ll freezer or
dewar).
This information should be documented daily and reviewed monthly to foresee and
prevent future problems such as temperature uctuations and varying liquid levels.
Prepare a contact list
Have at least 3 people on your contact list with Home, Cell and Pager Number. Review the
list regularly for accuracy and changes.
Contingency plan
What to do if no one returns a call from your call list.
What to do if we run out of LN2 and it is a weekend or holiday.
What to do if you have a High Temp Alarm.
What to do if you have a Low Level Alarm.
What to do if you have a High Level Alarm.
What to do if you lose power.
What to do if you get a Source Alarm.
RECOMMENDED BEST PRACTICES