Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 79)

Laser Gas Analyzer Alarm Messages
Teledyne Analytical Instruments 65
45
During the
measurement
process, the laser
power is too high
or the
background light
is too strong
a=O b=C c=X
4-20mA,
the exact
number is
from
calculation.
Reboot the system; If the same
alarm persists, and there is no
strong background light in the
gas flow pipe under test,
contact the technical support
center.
48
The measured
gas
concentration
exceeds Model
3500S upper
limit for 1
minute.
a=O b=C c=X
4-20mA,
keep the
last
measured
value
f the same alarm persists, and
the gas flow is not abnormal,
contact the technical support
center.
59
Low
transmittance
due to
contamination to
the optical
window or the
dust density in
the environment
under test
exceeds normal
range.
a=O b=C c=X 4-20mA
Power off the system; clean
the optical windows (follow
the instructions in Users’
Manual); If the same alarm
still persists, contact the
technical support center.
99
Model 3500
internal
communication
error alarm (the
status shown on
LCD may not
reflect the actual
system working
status).
a=C b=C c=C
4-20mA,
the exact
number is
from
calculation.
Power off the system; reboot
the system in an hour; If the
same alarm persists, contact
the technical support center.