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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.
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 -10 and 10 nA. For more information
refer to the analyzer manual.
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.
MODEL 499A OZ WIRING
5
When making connections through a junction box
(PN 23550-00), wire point-to-point.
NOTE:
Use a wire nut and pigtail (included) when
connecting several wires to the same terminal.
FIGURE 15. Pin Out Diagram for Model 499AOZ-VP
Sensor (top view of connector end of sensor)