Hach-Lange AMTAX indoor sc - Manual (Page 50)

50
Maintenance
To replace the membrane cap and the electrolyte and/or
electrode:
1. Select
MAINTENANCE>TEST/MAINT.>CHANGE MEMBRANE.
OR
1. Select
MAINTENANCE>TEST/MAINT.>REPLACE ELECTRODE.
1 Pull the electrode plug.
Carefully slide the
electrode key under the
electrode assembly and
pull to remove. Do not
apply excessive
pressure. 2 Carefully pull the
electrode straight out of
the electrode body.
Do not touch the
electrode with fingers.
Rinse the glass
electrode and the
electrode body with
distilled water to remove
any crystallation that
may have occurred,
because of complete
evaporation. 3 Secure the electrode to
the clamp on the
analyzer panel. Do not
touch the membrane. 4 Drain the electrolyte
from the electrode body.
Important Note: Never
add new electrolyte on top
of old electrolyte. Always
empty the electrode body
completely and use a new
bottle of electrolyte,
otherwise the
concentration of the
electrolyte will increase
and the measuring
accuracy will be reduced.
5 Unscrew and discard the
membrane cap. 6 Place the membrane
cap on the electrode
body. Do not touch the
membrane! To prevent
the electrolyte from
leaking, hand-tighten the
electrode cap. 7 Remove the cap from
the electrolyte and fill
the body with an entire
bottle of electrolyte,
(11 mL). Gently tap the
side of the body to
remove any air bubbles. 8 Carefully insert the
electrode into the body
making sure the tip is
not bent.