Thermo Scientific VH-D20 Operating Manual page 91

STATUS LED
Charged Aerosol Detectors (VH-D20, VF-D20)
Operating Manual
LED Bar
Yellow
Green, flashing
Green
Blue, running
Blue
Red
The STATUS LED on the keypad inside the device provides the following
information:
STATUS LED Description
Off (dark) The power to the device is turned off.
Green The device is functioning properly.
Red A problem or error has occurred. For the related message, check
the Instrument Audit Trail. For remedial action, see
Troubleshooting
For information about the LED that is present next to the GAS button on
the keypad, see Keypad
Description
The LED bar is yellow when both conditions apply:
• The detector is connected in the chromatography
data system, but the device is not equilibrated.
• The detector gas flow is turned off.
The detector prepares for operation. This comprises
the following phases:
• The detector performs the self-test.
• The detector is warming up.
If you defined in the chromatography data system
that the evaporation temperature must be within a
specified temperature range, the evaporation
temperature is not yet within this range. For details
on the setting, see Important Operating
Parameters (} page 104).
• The detector is equilibrating.
The LED bar is green when both conditions apply:
• The detector is equilibrated, but no data
acquisition is running.
• The detector gas flow and drain pump are turned
on.
A data acquisition is running.
The LED bar is blue when both conditions apply:
• An injection or sequence is running.
• No data acquisition is running.
A problem or error has occurred. For the related
message, check the Instrument Audit Trail. For
remedial action, see Troubleshooting
(} page 155).
(} page 89).
6 • Operation
(} page 155).
Page 91