DelAgua OXFAM-DELAGUA, Руководство пользователя

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OXFAM-DELAGUA Water Testing Kit — Users Manual
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Appendix F
Additional instructions for operating the dual incubator kit
The dual incubator kit allows you to double the number of tests carried out at one
temperature or test the same sample at 2 temperatures, typically:
•
37°C - Total coliform count (TC).
•
44°C - Thermotolerant coliform count (TTC).
•
The analytical procedures for TC and TTC using MLSB are identical except for the
incubation temperature. Similarly, the colony characteristics of TC are the same as
TTC, although you may find a more varied colony size and differences in the
intensity of the yellow colour.
Many water samples, particularly untreated water samples, will contain bacteria
other than coliform bacteria that can grow on MLSB at 37°C. The colony
characteristics of these background organisms will vary: only the coliform bacteria
will produce yellow colonies. However, be prepared for high background counts
when performing TC analysis.
There are 2 additional procedures that you should be aware of when operating the
dual incubator kit.
Charging and connecting the battery
The dual incubator kit is powered by an external 12V battery that is contained
inside the separate battery pack. On the front of the battery pack, the lead connects
to the dual incubator and the 3-pin socket is used to plug the charger into.
•
To charge the battery, connect the battery charger to the 3-pin socket and
charge for 12 hours
•
You must use the integral lead on the external battery pack to connect to the
dual incubator. Connect. Note: you must leave the lid of the kit open when the
battery pack is connected to avoid damaging the battery lead.
•
The battery pack can be connected to the battery charger and to the kit at the
same time.