Troubleshooting multi EA 5000
122
13.15 Device faults on the carbon detector
Error Possible cause Remedy
Analog values exceeding
values range (display in
the
Status analyzer
win-
dow)
¡ Analog values outside
of operating range
¡ Check the gas con-
nection to the basic
module
¡ Check the gas quality
¡ Check the analog val-
ues by performing a
component test:
Sys-
tem
menu
Component
test
¡ NDIR detector faulty ¡ Inform customer ser-
vice department
13.16 Analytical problems during TC, EC/OC determination
Error Possible cause Remedy
Scattering measurements ¡ Inhomogeneous sam-
ple matrix or sample
matrix containing
particles
¡ Warm up cold sam-
ples
¡ Homogenize sample
before analysis
¡ NDIR baseline drift
¡ Unfavorable integra-
tion criteria: Integra-
tion canceled to early
¡ Check settings
¡ Increase the maxi-
mum integration
time
¡ Sample unsuitable for
vertical operation
mode (droplet forma-
tion)
¡ Use the horizontal
operation mode
¡ In vertical operation
mode: Quartz wool
not present or at the
wrong position in the
combustion tube
¡ Check the position of
the quartz wool, ad-
just as necessary
¡ Sample evaporates
before dosing
¡ Use a cooled sampler.
¡ Sample too viscous
too be drawn in with-
out air pockets
¡ Use the horizontal
operation mode and
dilute the sample, or
dose directly as a
solid.
¡ Inhomogeneous sam-
ple or sample con-
taining particles
¡ Homogenize sample
Low results ¡ CO
2
concentration
outside of the operat-
ing range of the NDIR
detector
¡ Reduce sample vol-
ume/amount
¡ Dilute samples
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