5707070-A Installation and Operation 2-25
Sono-Trak™ Doppler Ultrasonic Flow Meter
Normal Operation
Once you have set up the Doppler flow meter for operation in your system, you may
virtually forget about it. The system is maintenance free, and does not require
calibration, since the readings do not drift over time. In the event of a power
interruption, your settings will be saved for up to 10 days in volatile memory powered
by a slow-discharge capacitor. the capacitor will recharge when power is restored.
Portable Battery Operation (Portable Units Only)
The LCD screen will flash LOW BAT every second when there is approximately one
half hour of safe operation remaining. Never totally discharge the gel cell battery. The
charger provided with the flow meter will recharge the battery fully in approximately
8 hours. You may leave the batteries in the charger overnight, since prolonged
charging periods will not damage the battery. The POWER switch on the flow meter
front panel must be in the OFF position in order for the internal battery to charge. If
the internal battery has been deep discharged, it will be necessary to charge the battery
for a minimum of 30 minutes before the front panel POWER switch is turned ON.
