Casella CEL Vortex Ultraflow area sampling pump - Manual (Page 7)

3. Connect a clean filter to the pump and adjust to the required flow
rate using the front panel keys.
4. With the pump running and the filter connected, adjust the
potentiometer anti-clockwise until the error LED flashes, then back
the adjustment off half a turn.
5. Replace the cover.
2.8 Timer
The LCD timer display situated on the front panel indicates the sample run
elapsed time in whole minutes. The timer can be reset to zero by holding
down the “RESET” key for 3 seconds. This can be carried out while the
pump is on or off.
2.9 Table of Functionality
Function Required Key
Press
LED Buzzer
Switch ON Press both keys
together.
Green “PUMP
ON” LED lit.
Double bleep.
Switch OFF Press both keys
together.
No LEDs lit.
Flow adjustment
mode
Press “FLOW”
key for 3 seconds.
Green “PUMP
ON” LED flashes.
Exit flow adjust-
ment mode
No key press for 4
seconds.
Green “PUMP
ON” LED stops
flashing.
Reset timer Press “RESET”
key for 3 seconds.
Operation
Pot VR2
The location of the potentiometer VR2
Page 7 of 12
VORTEX Ultra Flow & Ultra Flow lite
SAMPLING PUMPS Handbook