3. Push FAN TEST.
4. Push the fan icon to set the fans to on and off.
Calibrate the display
If the touch screen display does not allow an accurate item selection, calibrate the display.
1. Push << to show the sliding menu.
2. Push DIAGNOSTICS, then select the Tests tab.
3. Push SCREEN CALIBRATION.
4. Obey the screen prompts to calibrate.
See the calibration dates
1. Push << to show the sliding menu.
2. Push DIAGNOSTICS, then select the Calibration Dates tab. The screen shows the last
completed calibration dates for TOC, conductivity and the system suitability test.
Technical support
Technical support engineers can provide high quality advice and recommendations for applications,
product operation, measurement specifications, hardware and software, factory and customer site
training.
Any questionable problems should be referred to the manufacturer. Supply the information that
follows in any correspondence:
•
The serial number of the instrument
• Sample resistivity and temperature
• Current and historical TOC data
• Current and historical alarm codes
• A setup printout
• Process conductivity or resistivity and temperature
• Current and historical calibration, validation and system suitability results
• Any other significant changes in operating conditions
If existing problems warrant equipment return, contact the manufacturer or a sales representative
immediately.
Appendix
Theory of operation
The analyzer enables TOC analysis for pure and ultra-pure water processing. The analyzer oxidizes
a water sample to find the TOC in the sample. The analyzer traps a water sample in the analysis cell,
exposes the sample to ultraviolet (UV) light to oxidize a sample of water (photolysis) and monitors
changes in temperature and conductivity until the sample has completely oxidized. Once full
oxidation has occurred, the analyzer reports TOC.
Conductivity (in µS/cm) or resistivity (in MΩ-cm)—unadjusted for temperature or corrected to 25°—
and sample temperature are measured and shown along with the oxidation curve type and TOC
trend. The analyzer includes an integral inline filter, flow control valve and heat exchanger to make
sure that the proper water flow rate and temperature are accurate for TOC analysis. An internal
pump is available for sampling water from a supply with no pressure and to deliver standards to the
analysis cell from the Onboard Automated Standards Introduction System (OASIS
™
). Refer to
Figure 13.
50 English
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