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2.3 INSTALLING
THE
The TC80 is supplied with the sensor cables pre-wired to the analyzer. The TC80 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 4.2 below)
The pH sensor mounts in the Flow Cell using an o-ring sealed flange/union mount with threaded locking cap.
First remove the protective cap from the sensing end of the sensor and save it for future use, the cap contains a
potassium chloride solution use care when removing the cap from the sensor. Insert the sensor into the flow
cell. There is an o-ring seal inside the flange that seals against the face of the flow cell. Slide the sensor into the
flow cell and then hand tighten the knurled compression cap to fix its position.
The Chlorine sensor is held in the flow cell with a union nut. Slide the sensor into the flow cell and hand tighten
the compression cap after filling the sensor with electrolyte.
1. Lift the silicone band to Expose the vent hole and unscrew the measuring cap from the sensor.
2. Fill the cap to the bottom of the threads with the gelled electrolyte and tap it gently to dislodge any
trapped bubbles inside the cap.
3. Screw the sensor into the measurement cap at a 45° angle ensuring all air inside the chamber is purged
through the vent hole on the side of the cap.
4. When the o-ring begins to seal continue slowly tightening until it hits the stop.
5. Replace the silicone band back over the vent hole and rinse the purged electrolyte from the sensor body
with water.
The sensor is ready to use, re-polarize the sensor for 60 minutes before calibration.
Refill the sensor with electrolyte (PN 100246-1) every 3-6 months, depending on the chlorine level measured.
The measured chlorine is reduced to chloride inside the cell and must be periodically removed. Samples with
around 5 ppm total chlorine require the sensor to be refilled every 3-4 months.
2.4 PLUMBING
2.4.1 S
R
AMPLE
EQUIREMENTS
The constant head flow controller can adapt to changing sample flows between 10 and 80 gal/hr. (40-300 L/hr.)
Minimum flow: 10 gal/hr. (38 L/hr.)
Sample Pressure: 1 to 30 psig (0.1 - 2 bar)
Temperature: 32° to 122°F (0° to 50°C)
2.4.2 C
ONNECTING THE
The TC80 is intended for wall mounting only.
Sample Inlet:
A ¼" barbed fitting is provided for the sample inlet. If desired, a ¼"compression fitting can be used. The sample
inlet is ¼" FNPT. Attach the feed water line to the Constant Head Flow Controller with an adjustable shut off
valve.
Sample Drain:
The sample drains through the ¾" FNPT hole at the bottom of the CHFC. Attach a ¾" fitting to a length of soft
tubing and allow the waste to drain to open atmosphere. Do not restrict the drain line.
The sample can be introduced after the sensors have been calibrated and installed in the flow cells.
2.4.3 A
DJUSTING THE
Adjust the flow so the sample water fills the tube and slightly overflows into the center tube to drain. This
provides a constant flow to the chlorine and pH sensors controlled by the height of the water column. The
sample flow rate must always be high enough to over flow the center tube or variations in the flow rate will
occur causing decreased output from the Total Chlorine Sensor.
SENSORS
I
D
NLET AND
RAIN FITTINGS
S
F
R
AMPLE
LOW
ATE
18
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