MANUALPC-2010 CHAPTER II – INSTALLATION Page 17
Storage and Winterizing
CAUTION: STORING OR SHIPPING A SENSOR WITHOUT
CAP OR WATER WILL VOID ITS WARRANTY.
All ORP and pH sensors are shipped with a plastic cap on the
tip to protect the tip from physical damage. This cap also
contains water to prevent the sensor from drying out.
Remember to store the protective caps inside the sensor box
or inside controller cabinet so that they are available for
storage, winterizing or shipping. When storing or returning any
sensor for warranty consideration, always add water inside the
cap to prevent the sensor from drying out.
Freezing can damage the ORP and pH sensors. They should
be removed from the line and stored at room temperature
whenever freezing is expected.
Sensor Warranties
T
he PPM, ORP and pH sensors are covered by a standard
one-year manufacturer warranty. This does not include
damage caused by physical abuse such as breakage of the
inner glass tubing or by drying out of the tip. BE CAREFUL IN
HANDLING THE SENSORS and ALWAYS REPLACE THE
CAP WITH WATER INSIDE when not in use.
In case of sensor failure, return it as soon as possible with its
cap on and with water inside the cap for warranty consideration
or replacement.
TEMPERATURE SENSOR
If the CONDUCTIVITY option is not included, the Temperature
Sensor is supplied separately as a thermistor imbedded inside
a ¼" MPT fitting with a 10-ft (3 m) connecting cable (Figure
15). A 1/4" reducer epoxied to a ½" SxS PVC tee is also
supplied.
Install the sensor near the ORP and pH sensors, either directly
on the main line or on the bypass line (Error! Reference
source not found.), flow cell) or sensor cell cabinet (Figure
11).
Connect the red and black leads to the Terminal Barrier strip
TB5 as indicated on the schematic of the Mother Board
(Error! Reference source not found.).
NOTE: When the CONDUCTIVITY option (TDS) is specified,
the temperature sensor is incorporated in the
conductivity sensor (Figure 16). This simplifies
installation, as only one sensor fitting is required.
Figure 15 - Temperature Sensor
CONDUCTIVITY SENSOR
The Conductivity or TDS (Total Dissolved Solids) Sensor
consists of two graphite electrodes forming the measuring cell.
It also contains a thermistor that is embedded inside the
sensor. The sensor is supplied with a 10-ft (3-m) connecting
cable and a specially drilled ½" MPT PVC fitting, as shown on
Figure 16.
Using a ½" FPT PVC tee, install the sensor near the ORP and
pH sensors, either directly on the main line or in a 90
O
elbow
on the bypass line (Error! Reference source not found.), flow
cell) or sensor cell cabinet (Figure 11). Make sure that the
sensor is oriented so that the water flows smoothly through the
measuring cell.
The four leads from the conductivity/temperature sensor must
be connected to the Terminal block strip TB5 on the Mother
Board (Error! Reference source not found.).
Figure 16 - Conductivity Sensor
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