Electro-Chemical Devices (ECD) DCA-23 - Manual (Page 12)

Page 6 DCA-23 Dechlorination Analyzer
2.3 PLUMBING
2.3.1 Sample Requirements
Sample Pressure: 1 to 50 psig (0.1 – 3.4 bar)
Temperature: 32° to 140°F (0° to 60°C)
2.3.2 Connecting the Inlet and Drain fittings
The DCA-23 is intended for wall mounting only.
Sample Inlet:
A ¾” pipe slip fitting is provided for the sample inlet.
Sample Drain:
The sample drains through the ¾” pipe slip fitting.
The sample can be introduced after the sensors have been calibrated and installed in the flow cells.
2.4 INSTALLING the SENSORS
The DCA-23 is supplied with the sensor cables pre-wired to the analyzer. The DCA-23 instrument and
sensors were calibrated at the factory and should be ready for use when assembled. However, changes
may have occurred during shipping and storage requiring recalibration. (See Calibration section below)
The TRO sensor mounts in the Flow Cell using the supplied ¾” compression gland fitting. Remove the
protective cap from the sensor and save it for future use, the cap contains a potassium chloride solution
use care when removing the cap from the sensor. Loosen the compression fitting to allow the sensor to
spin freely in the fitting. Insert the sensor into the flow cell using a twisting motion. There are o-ring
seals inside the fitting the twisting motion will facilitate passing these seals. Slide the sensor to the
bottom of the flow cell and then retract the pH sensor approximately ½” from the bottom of the flow
cell and hand tighten the compression nut to fix its position.
The pH sensor mounts in the Flow Cell using the supplied ¾” compression gland fitting. Remove the
protective cap from the sensor and save it for future use, the cap contains a potassium chloride solution
use care when removing the cap from the sensor. Loosen the compression fitting to allow the sensor to
spin freely in the fitting. Insert the sensor into the flow cell using a twisting motion. There are o-ring
seals inside the fitting the twisting motion will facilitate passing these seals. Slide the sensor to the
bottom of the flow cell and then retract the pH sensor approximately ½” from the bottom of the flow
cell and hand tighten the compression nut to fix its position.