Replace Needle And Syringe; Replace Reagent Vials - Focustronic Mastertonic User Manual

• In LCD now you see a message prompt you to manually fill the reaction
chamber with 11 ml of rinsing solution. Be careful to not spill any water
outside the chamber! The rinsing solution shall be the same as you
use for cleaning pH-probes, a 0.1M HCL solution. You can find that in
all aquarium retailer stores.
• Machine will now automatically set a timer for 25 min
• After 25 mins the machine will automatically empty and finish the
descaling.
Cleaning
• Make sure the needle is in maintenance position and reagent chamber
and hoses are empty. Normally its totally emptied as all test cycles end
with an empty phase and also after a restart Mastertronic starts with an
empty program. But If there is, for some unpredictable reason, some
water in the hoses and/or chambers, press "Empty Chambers and Hoses"
from the app menu.
• Use a Q-tip/cotton bud and soak that with ethanol (its ok to use for
instance non gel based hand-alcohol of different kinds). Rotate gently the
Q-tip/cotton bud against the inside of the reaction chamber a few times.
• Open the app and press "Rinsing Reaction Chamber" and machine will
automatically finish the cleaning program.

Replace needle and syringe

Replace both the needles (sample needle and vent needle) and syringe every 4
weeks. When press needle on the syringe do NOT apply too much force.

Replace reagent vials

Depending on which reagent this interval may vary quite a lot, and is different
between the vials. As a rule of thumb replace a reagent vial every 6-8 months. The
best way to judge is to look at the rubber membrane and if that shows sign of ageing,
cracking or very dry then its time for a new vial.
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