Casella CEL Vortex Ultraflow area sampling pump - Manual (Page 5)

and ensures maximum life of the battery pack. Should the pump be
switched on with a discharged battery, battery low warning bleeps will be
given prior to the pump shutting itself down.
2.3 Switching the Pump ON and OFF
To switch the pump ON, press the “FLOW” and “RESET” keys at the same
time. The buzzer will bleep twice and the green “PUMP ON” LED will be lit,
indicating that the pump is switched on and running.
To switch the pump OFF, press the “FLOW” and “RESET” keys at the same
time.
2.4 Indicator LEDs
There are two light emitting diodes (LED’s) located on the front panel of the
instrument.
PUMP ON
Green Indicator: used to indicate that the pump is switched ON and is
running. The LED flashes when in flow adjustment mode.
ERROR
Red indicator: used to identify one of two potential error conditions.
Battery Low Warning
When the battery approaches a discharged condition, the red
“ERROR” LED flashes slowly. Sampling should be terminated and
the battery recharged.
Flow Fault Shut Down
The red “ERROR” LED flashes rapidly whenever the pump’s loading
exceeds a pre-set value. This may be due to excessive back
pressure from a tube restriction, filter blockage, or pump fault.
Should the fault condition remain for 8 seconds then the pump will
automatically shut down and the “ERROR” LED will remain lit. The
timer display will retain the present value enabling a valid sample
volume to be calculated from the indicated elapsed time and the
initial flow rate.
Pressing both keys will cancel the error warning.
Operation
Page 5 of 12
VORTEX Ultra Flow & Ultra Flow lite
SAMPLING PUMPS Handbook