28
Electrode Care and Maintenance
WARNING:
STATIC ELECTRIC SHOCKS CAN DAMMAGE THE
ELECTRODE AND THE METER. DO NOT ATTACH ELECTRODE
WHEN METER IS ON.
The electrode is the most sensitive component of the
L2000
DXT
system. Care must be taken not
to damage the sensing membrane on the tip of the electrode. If it does become damaged or
contaminated, it may be possible to restore the electrode response by polishing. To polish the
electrode: Remove one of the membrane polishing strips from the instrument case and place it
flat on a solid surface, abrasive side up. Place one or two drops of RINSE solution or distilled
water on the abrasive strip. With the electrode perpendicular to the abrasive strip, polish the
electrode tip by gently moving it in a circular motion for about 30 seconds. Apply constant
pressure, but do not push too hard on the electrode. When finished, soak the electrode for five
minutes in rinse solution. Polishing strips can be reused several times.
NOTE: DO NOT
OVER POLISH. ELECTRODES SHOULD BE POLISHED ONLY WHEN
NECESSARY.
When an electrode is not to be used for a period of more than one week or for an indefinite
period, drain the filling solution from the electrode, flush the inside one or more times with
distilled water, and store it dry with the protective black cap to protect the sensing membrane.
Make sure to follow the procedures for restoring electrodes before using the electrode again (see
Restoring the Electrode after Extended Storage
).
Otherwise, the electrode filling solution should not be allowed to evaporate causing
crystallization. For short periods of time between sample measurements, including up to one
week storage, maintain filling solution in the electrode and store the electrode in rinse solution.
(NOTE: If a period of 12 hours [overnight] or longer elapses between measurements, drain a
portion of the filling solution from the electrode, add additional filling solution to the filling hole,
and start with fresh rinse solution.)
Troubleshooting
The instrument does not turn on.
1.
The battery is dead. Plug in the AC adapter and retry.
2.
The power management circuit has been overloaded and is locked due to a severe static
electric discharge during the connection of the electrode, wait 10 minutes and try again.
Contact Dexsil Corporation for further technical assistance.
The instrument turns on but the time and date have been lost
.
1. The power management circuit has been overloaded and has reset. This is most likely due to
a static electric discharge during the connection of the electrode. Re-enter the time and date
and proceed with the operation of the instrument. Follow the procedure outline under