30 | Maintenance and Troubleshooting
7070iX TRO Analyzer
Maintenance Schedule
Weekly Maintenance
Leak Check
Look for leaks at any of the fittings and tighten
as required.
Verify Monitor Reading
Take a grab sample for analysis
according to the procedure in the Grab Sample Analysis
section.
Monthly Maintenance
Clean Inlet Filter (if used).
Calibration
The monitor should be calibrated monthly or at the same time
that reagent is changed. After the installation of a new
electrode, the monitor should be re-calibrated 48 hours after
the initial calibration. It will be found that for most applications,
there will be little, if any, difference. Some waters with a very
high organic content might show an initial shift in calibration
point which will then remain stable after a day or two of
operation.
Quarterly Maintenance
Tubing
that is exposed to sample with reagent should be
changed every 90 days. The tubing may also have to be
changed more frequently if the sample is heavily loaded with
suspended solids. The supplies list contains replacement
tubing and fittings, Cat. No: 7070TK. Be sure that the white,
translucent Teflon tubing is used to replace sample and
standard tubes containing iodine solution. Iodine is absorbed
by other plastic tubing materials, affecting monitor accuracy.
Yearly Maintenance
1. Replace the sensing electrode.
2. Replace O-rings and grommets as required (included in
the electrode kit), Cat. No 7070EK.
3. Clean the optic sensor in the sample chamber.
Updating the Software
Use a USB Drive with an upgrade file to update the firmware
for the TRO Analyzer.
•
Select
Menu > Service > USB > Load New Software
.
•
Follow the instructions on the screen.
Instrument screen read ----
ppm
No flow to analyzer;
no drain in waste line while
only drain from fast loop
Flow valve shut off to
analyzer; or pump that
supplied flow stopped;
Pressure was too low to
supply water to analyzer
(needs > 5 psi)
Resume flow by providing
the need water pressure
with pump on or turning on
flow switch or valve to allow
flow to analyzer
In Remote control mode or
scheduled mode during off
periods
Remote control and
scheduled control can turn
off analyzer and turn on
analyzer.
Wait until scheduled time
for measurement or turn on
measurement in remote
mode
Has flow to analyzer and
drain through both waste
line and fast loop line
Flow sensor failure
Replace flow sensor;
Call technical service
TRO reading fluctuating
wildly to higher or low
(e.g. -99)
Mostly stable, occasionally
very high or very low
readings.
Air bubbles trapped in
measurement cell close to
ISE probe
Take out ISE probe and let
water refill measurement
cell at full level;
then put it back
Table 5. Troubleshooting Guide
Problem
Additional
Observation
Root Cause
Solution
