7070iX TRO Analyzer
Maintenance and Troubleshooting | 29
Troubleshooting
The following procedures instruct how to locate, evaluate and fix a problem when TRO analyzer issues an alarm.
Table 4. Alarm Guide
Problem
Additional
Observations
Root Cause
Solution
No Sample Flow
(red banner)
Display value - - -
No Sample in Flow Sensor
Investigate sample input
Reagent Empty
(red banner)
Display value - - -
Reagent is empty
Replace the reagent. Also
select “Replace Reagent”
from the menu to reset time
Reagent Low
(yellow banner)
16 hours of reagent
remaining
Check reagent inventory,
buy reagent if needed
Controller Fault
(red banner)
Display value - - -
There is a problem with the
reagent or sample pump
Power-cycle the unit.
If still persists, contact
technical support
Default calibration
(yellow banner)
Factory calibrated:
recommend to do a 2-point
calibration on site after
initial installation and
start up.
Perform a 2-point cal
Hold
(yellow)
Waiting for stable reading
of 4-20 mA output
Wait for 2 minutes
Table 5. Troubleshooting Guide
Problem
Additional
Observation
Root Cause
Solution
Instrument bias (reading
drifted from standard)
After calibration,
Bias in the reading of
DI water > = 0.03 ppm;
or bias > = 0.03 ppm for
standard solution
Reagent oxidized;
Call Thermo Fisher;
replace reagent with new
reagent
After calibration,
bias goes away
Calibration was off
Recalibration solved the
issue
Process sample from
sample line did not read
right
3-way valve pointing to the
right (taking grab sample)
Wrong valve position; to the
right for grab sample; to the
left for sampling from
sample line
Turn valve to the left
Grab sample did not read
right
3-way valve to the left
(taking inlet sample)
Wrong valve position; to the
right for grab sample; to the
left for sampling from
sample line
Turn valve to the right
