TD-550/560 Oil in Water Analyzer Troubleshooting
PN 106737
REV H
TD-550/560 Oil in Water Analyzer
Operation Manual
29
6. Repeat Steps 4 and 5, taking care to remove and re-insert the cuvette at least ten times.
7. Using a statistical program, calculate the standard deviation of the ten or more blank
measurements.
8. Multiply the standard deviation by 10.
9. The value in Step 8 provides an approximate recommendation of the minimum reportable
concentration.
6.4 ERROR MESSAGES
The TD-550/560 has various messages and controls that do not allow certain features to be chosen for
situations where a conguration choice is not applicable.
If the analyzer is not connected to the tablet, a not connected message will appear. Connect the
tablet and the analyzer with the provided cable and restart the power. Note that disconnecting the
power supply from the AC source while the power cable is connected to the analyzer can cause a
disconnection message. If this happens, either plug the power supply back into the AC source or restart
the power on the tablet.
In rare cases that a solution with excessive light absorption is caused by either hydrocarbons or other
materials in the solvent is evaluated, a “Bad Tx” message appears. If this happens, it may be necessary
to calibrate at a lower concentration, calibration with a different solvent, or measure a diluted extract.
In some cases it may be desireable to retrieve the data from the analyzer for reporting or
troubleshooting. To do this, connect the tablet to a computer with a user-provided cable. Go to the tablet
settings and then to the Connected devices section. Tap the USB section. Under “Use USB for”, select
File Transfer. Then use the computer to navigate to the Benchmark International_Datalog folder. Here
you can nd calibrations in the Calibration_History le and a list of readings in the Readings le. When
the analyzer to tablet cable is reconnected, it will automatically congure the USB communication.
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