Casella CEL Vortex personal sampling pumps - Manual (Page 4)

2. OPERATION
These samplers are based upon an efficient diaphragm pump whose flow
rate is precisely maintained by automatic flow control circuitry.
With the exception of the ELAPSED TIME display, the layout of both VORTEX
pumps is identical, as shown below.
Operation
On/Off
Flow Adjust
Counter Reset
Keys
Charging
Socket
Indication
LEDs
Charging
Socket
Indicator
LEDs
Keys for:
On/Off,
Flow Adjustment,
& Elapsed Time
Reset (Timer 2
only).
Elapsed Time
Indicator
(Timer 2 only)
Page 4 of 16
VORTEX Standard 2 & VORTEX Timer 2
PERSONAL SAMPLING PUMPS Handbook