MODEL 499A OZ | WIRING |
FIGURE 13. Wiring Sensor with Standard Cable to Model 1066 Transmitter.
FIGURE 14. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to Model 1066 Transmitter.
FIGURE 15. Pin Out Diagram for Model
When making connections through a junction box (PN
NOTE:
Use a wire nut and pigtail (included) when connecting several wires to the same terminal.
CALIBRATION
Zero point: Even in the absence of ozone, the 499AOZ sensor generates a small signal called the zero current. Failing to correct for the zero current can introduce a bias, particularly if the ozone concentration is small (<0.4 ppm). Zero the sensor when it is first placed in service and every time the fill solution is changed. To zero the sensor, place it in a cup of deionized or bottled water. Once the sensor current has reached a stable low value, which takes at least two hours, follow the analyz- er prompts for zeroing the sensor. The zero current should be between
Full Scale: Because stable dilute ozone standards are not available, the sensor must be calibrated against the results of a laboratory test run on a grab sample of the process liquid. Place the sensor in the flow cell and adjust the sample flow to the correct range. Also, adjust the concentration so that it is near the upper end of the operating range. Once readings are stable, follow the analyzer prompts to complete the calibration. Be sure taking the sample does not alter flow to the sensor, and test the sample immediately after collection. After calibration, go to the diagnostics menu and check the sensitivity. It should be between 250 and 450 nA/ppm. For more information, refer to the analyzer manual.
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