TT-CL
2
Free Chlorine Sensor
13
TURTLE TOUGH
4.0.7
Double flowcell
The sensor fits into the right-hand entry (if used with a pH or ORP probe). The o-ring is first inserted in the 1”
opening of the adaptor followed by the PVC shim. Then the 1” PVC threaded end cap is screwed in loosely. The
probe is inserted into this prepared probe housing, so the flow passes directly over the probe tip. Then the probe
is fixed in place by tightening (hand tight only) the threaded end cap, so the probe cannot move away from its
position.
As with the single flowcell, there should be 25mm (1”) of clear space between the tip of the sensor and the conical
base of the flowcell tube (refer to 4.0.6.1) if using the left-hand entry.
5.0
Commissioning
It is recommended that the instrument is commissioned by a trained commissioning engineer. During
the commissioning the engineer can train the operators in the correct operation of the instrument.
The installation and commissioning should proceed in the following manner:
1)
Install the unit
2)
Check the sensor for damage
3)
Make up the sensor
4)
Ensure that water flows through the flowcell and over each sensor’s measuring end.
5)
Calibration
After the Cl2 sensor has completely polarized (from 2-12 hours of water flow with the electronics turned on
and chlorine in the water), calibrate the sensor using a suitable test kit (eg DPD for Cl2).
6.0
Troubleshooting Guide
Sensor faults will usually show themselves as unexpected readings. Unexpected readings can also be caused
by the electronics, so when troubleshooting it is important to determine the cause of the variable readings.
Cl2 sensors can be supplied with an electrochemical probe simulator. If the instrument displays unexpected
readings, unplug the probe and plug in the probe simulator. This supplies a fixed constant reading to the analyser.
If the reading is not constant, please contact your supplier.
Symptom
Possible cause
Possible solution
Chlorine
incorrect
Sensor disconnected
Check sensor connected
Probe depolarised after
extended zero period
Probe will re-polarise after
2-12 hours
Sensor connected
incorrectly
Check sensor connected to
correct channel
6.1
Further help
For more troubleshooting, please visit
t www.turtletoughsensors.com
