Thermo Scientific Surveyor RI Plus, Hardware Manual

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5
Troubleshooting
Detector-Related Problems
38 Surveyor RI Plus Detector Hardware Manual Thermo Scientific
2. Random noisy
baseline.
a. Contaminated flowcell. a. Flush the flowcell with
cleaning solvents as
described in
Chapter 4,
“Maintenance.” Check for
leaks.
b. Leak in sample inlet line. b. Check all of the fittings
from the column outlet to
the flowcell inlet for leaks.
c. Bubble trapped in flowcell. c. Increase the flow rate until
the bubble is removed.
Supply a backpressure
device to flowcell (check
pressure rating to avoid
rupturing flowcell).
d. Leaking flowcell. d. Replace the flowcell.
e. Insufficient lamp warm-up. e. Allow a 30 minute
warm-up for normal
operation and 1.5 hours for
maximum sensitivity.
f. Lamp aging or defective. f. Replace the lamp.
g. Ground loop problem
between integrator and
detector.
g. Check for the proper cable
connections to the detector
output; do not ground at
both ends of cable.
h. Flowcell or lamps dirty. h. Clean the flowcell as
described in Chapter 4,
“Maintenance.”
i. Integrator input voltage
does not match detector
output voltage. i. Verify that the integrator is
connected to the
appropriate Analog Output
connections on the
detector. Check the
attenuation setting on the
integrator.
Table 7. Troubleshooting detector-related problems (Sheet 2 of 5)
Symptom Cause Remedy