Martindale ET4000 / ET4500 Instrument description
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Alkaline or rechargeable Ni-MH batteries (size AA) can be used in the ET4000
and ET4500. Martindale recommends only using rechargeable batteries with a
capacity of 2100mAh or above.
Unpredictable chemical processes can occur during the charging of batteries that
have been left unused for a long period (more than 6 months). In this case it is
recommended to repeat the charge / discharge cycle at least 2-4 times.
If no improvement is achieved after several charge / discharge cycles, then each
battery should be checked by comparing battery voltages. It is very likely that not
all of the batteries have deteriorated. One bad battery can cause poor
performance of the entire battery pack.
The effects described above should not be confused with the normal decrease of
battery capacity over time. Batteries also loses some capacity when repeatedly
charged / discharged.
4.2 Display and audible indication
4.2.1 Terminal voltage monitor
The terminal voltage monitor constantly displays the voltages between the test terminals
and shows which test terminals are active for the measurement function selected (see
examples below).
Online voltages are displayed together with test terminal indication. All
three test terminals are used for the selected measurement.
Online voltages are displayed together with test terminal indication. L
and N test terminals are used for the selected measurement.
L and PE are active test terminals; N terminal should also be connected
for correct input voltage condition.
Polarity of test voltage applied to the output terminals, L and N.
4.2.2 Battery indication
The battery indication indicates the charge condition of the batteries and the connection
of an external charger.
Battery capacity indication.
Low batteries.
Batteries are too weak to guarantee correct results. Replace or
recharge the batteries.
Charging in progress (if charging adapter is connected).
4.2.3 Messages
In the message field warnings and messages are displayed.
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