26 | Calibration and Validation
7070iX TRO Analyzer
Measure a Grab Sample or
Performing a Validation
You can check the analyzer’s calibration accuracy at any time
using the validation function. Validation consists of running a
measurement and reporting the result in concentration. This
reported result can then be compared to the expected value,
which is the known concentration of the validation solution, to
determine the accuracy of system calibration.
The advantage of using this function over the Run Analysis
function is that prior knowledge of the concentration allows
for validating the accuracy of the analyzer, without affecting
the data reporting to your control center or device.
The validation is similar to the measurement except that the
sample source is from a known concentration solution.The
known concentration solution is poured into the provided
grab sample bottle, put the grab sample bottle cap back onto
the bottle, then rotate the bottle clockwise to cap the bottle.
Turn the 3-way valve to grab sample position.
To start the validation process,
click Menu--> Measurement--> Validation / Grab Sample and
then follow the instructions on the screen.
Figure 39. Click Measurement
Figure 40. Select Validation / Grab Sample
Figure 41. Just press ‘Escape’ until screen shows
no sample
When grab sampling is completed, press ‘Escape’ until you
reach the measurement screen.
The Validation/Grab sample is similar to the standard
measurement except the sample/standard is from a grab
sample bottle.
The user uses the grab sample bottle to measure grab
samples taken from other areas in their system or to measure
a standard for calibration verification.
•
Collect 350 - 600 mL of the sample or standard in a clean
container.
•
Rinse the grab sample bottle with the collected sample or
standard multiple times.
•
Pour the rest of sample or standard into the grab sample
bottle and place the bottle into the grab sample holder.
•
Select
Menu > Measurement > Validation/Grab
Sample
.
•
Complete the instructions on the display.
Note:
When performing a Validation/Grab sample , with the
TRO analyzer, the user should remain in front of the analyzer
and make sure there is enough sample/standard to finish the
measurement. Prolonged running of the analyzer without
sample/standard may permanently damage the sample/
standard pump and/or the analyzer, which is not covered
under warranty.
WARNING:
Make sure there is enough sample in
the grab sample bottle testing. Running the
analyzer for long time without sample may
damage the pumps.
