Operating instructions

Charged Aerosol Detectors
Corona Veo and Corona Veo RS
Page 52 Operating Instructions
5.3.3.1 Diagnostics Screen
The Diagnostics screen displays information with regards to factory-set and internally
calibrated parameters. Real-time values are displayed.
Fig. 9: Diagnostics screen (here: Corona Veo RS)
The following functions and parameters are available on the screen:
Parameter Description Typical Values
Flow Ratio Indicates the ratio of nebulizer gas pressure to the
charging gas pressure calibrated at factory.
Normal
Ion Trap Removes highly mobile gas ions. 18 V – 20.9 V
Gas Pressure Indicates inlet pressure from gas source. 276 – 448 kPa
(40-65.0 psig ± 0.1
psig)
Evaporation Temp Displays if the evaporation tube is operating and the
actual evaporation temperature.
35 C
Charger Voltage Indicates the applied voltage to the corona wire to
charge the (secondary) ion gas stream.
1.8 kV – 3.0 kV
Charger Current Indicates the current required to charge the (secondary)
ion gas stream.
0.99 – 1.01 µA
To return to the Run Mode Menu, press the Settings soft key.
Flow Ratio = 0.42
Ion Trap = 20.5 V
Gas Pressure = 62.9 psi
Evaporation Temp = On, 35 C
Charger Voltage = 2.25 kV
Charger Current = 0.99 µA
Exit
Run Mode
Graph
Auto Zero
Evap T
DIAGNOSTICS