Philips Avalon CTS M2720A, Service Manual

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Battery Check 6 Preventive Maintenance and Safety
57
5 If the pressure does not fall rapidly, then the ventilation membrane is congested. Replace the belt button
(see page 91, or the instruction sheet, “Removing and Replacing the Belt Button”, that accompanies the
belt button replacement kit (part number M2720-64001) containing:
– three replacement buttons.
– a special tool to remove the button.
– the instruction sheet.
Battery Check
If you suspect that battery performance is below normal expectations, and especially if the operating time
consistently falls below 16 hours, charge the batteries.
. Batteries that have a reduced capacity can still be used,
even though they will have a shortened operating time, but a replacement should be considered as soon as
possible.
When battery performance is suspect, even after a normal charge cycle, run the battery check. The Battery
Check is a diagnostic procedure for determining the operating time of a fully charged battery. In normal
operation, the battery will rarely approach a state of full discharge, typically only a small proportion of the
total capacity will be used.
Even a battery with suspect performance will still have a relatively high capacity when it is freshly charged.
As a result, the test takes approximately eight hours. For the duration of the test, the Avalon CTS cannot
be used.
To limit this down time, the test automatically stops if the batteries have reached the minimum
operating time.
Removing a transducer from the base station during a battery check will start the transducer shut down
process.
To run the battery check, all transducers must be inactive and at least one transducer must be docked in the
base station. In the following example describes a battery check with two docked transducers, Transducer 1
and Transducer 2, in slots 1 and 2 respectively. Transducer 2 has a battery exhibiting reduced performance.
Starting the Battery Check
Step Action Display looks like...
1 Press the two arrow keys simultaneously. The bed label
blinks, the two-digit display goes blank.
2 Press twice to enter the ‘A’ settings. ‘A’ flashes in the
display.
3 Press . ‘A1’ appears, and the ‘1’ blinks.
4 Press twice to increment ‘A’ setting to 3.
5
Press . Base station display shows two segment bars for the
duration of the check.