Siemens DCA Vantage - Page 132

132 DCA Vantage Operator’s Guide
Troubleshooting
E26
Excessive
noise in sample
reading
The standard deviation
of the 16 readings at the
Sample channel during a
reading taken is too
large in Sample read
position.
Possible causes:
• low lamp intensity
• lamp alignment/
rotation
• lamp intensity
variation
1. Discard the sample.
2. Power off the system.
3. Clean the cartridge area. Refer
to Removing and Cleaning the
Cartridge Spring and Cartridge
Area‚ page 98.
4. Restart the system.
E27
Excessive
Lamp Drift
The change in mean
signal between
successive Air readings
is too large at either the
Sample channel or the
Reference channel.
Possible causes:
• dust in the optical
path
• lamp filament
orientation
1. Discard the sample.
2. Power off the system.
3. Clean the cartridge area. Refer
to Removing and Cleaning the
Cartridge Spring and Cartridge
Area‚ page 98.
4. Restart the system.
E30
Thermal control
system error -
low
The temperature
measured by one of the
cartridge holder
thermistors is2
º C.
Possible causes:
• defective heater
plate
• defective thermistor
assembly
• defective connector
• defective electrical
circuit
1. Discard the sample.
2. Restart the system.
Error Code Description Corrective Action