Maintenance; General; Charging The Device - Endress+Hauser Proline Prosonic Flow 93T Portable Operating Instructions Manual

Maintenance

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7 Maintenance
7.1

General

The flow measuring system Prosonic Flow 93T requires no special maintenance.
Exterior cleaning
When cleaning the exterior of measuring devices, always use cleaning agents that do not attack the
surface of the housing and the seals.
Coupling fluid
A coupling fluid is required to ensure the acoustic link between the sensor and the piping. This is
applied to the sensor surface during commissioning. Periodic replacement of the coupling fluid is
usually not required.
7.2

Charging the device

Prosonic Flow 93T is charged applying the supplied power supply type FW7362M12 or the optional
DK9ZT-2 automobile cigarette lighter charging cable. Prosonic Flow 93T is supplied pre-charged,
but it is recommended to charge the device before first use.
The Prosonic Flow 93T can be charged in the temperature range +5 to +45 °C (+41 to +113 °F).
The charging process is monitored and protected. It will idle when the temperature at the battery
pack exceeds +35 °C (+95 °F) and resume when the temperature drops below that temperature.
Below +5 °C (+41 °F) and above +45 °C (+113 °F) charging is terminated. The charging time is
4 hours when starting empty. Good maintenance praxis is to charge the battery pack fully before
use and optimally to discharge it fully before recharging to ensure optimal battery life.
The device will automatically stop the charging when the battery is fully charged. The charge bar
will indicate 100%.
Caution!
Unit should not be left without a recharge cycle for more than approximately 4 months.
After 4 months without a charge the battery may need replacement.
Proline Prosonic Flow 93T Portable
Endress+Hauser