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6.3.3 µS/cm – Units
Micro Siemens/cm is the preferred option.
Press the
button to select On for µS/cm. Press the
button to select OFF, for ppm.
Press the
button to confirm your selection and move to the next menu option.
6.3.4 SP - Set Point
The set point is the TDS value at which the blowdown or dump valve will open. The boiler
manufacturer should be consulted wherever possible to specify the most suitable value. It
has a fixed hysteresis of 5%. If the controller is only being used to provide an alarm, set the
'SP' reading to 99.9% FS.
To select a Set Point:
Press the
button to show the current Set Point, then press the
button to increase each digit.
Press the
button to confirm your selection and move to the next menu option.
6.3.5 AL – Alarm
The TDS level at which the alarm is released. The alarm is used to warn of an unacceptably
high TDS level. The level is set in accordance with the boiler manufacturers recommendations.
The alarm setting must be above the Set Point level. The alarm has a fixed hysteresis of
3%. If the alarm is not used, set the 'AL' reading to 99.9% FS.
To select the alarm setting:
Press the
button to show the current value, then
button to increase each digit.
Press the
button to confirm your selection and move to the next menu option.
6.3.6 ALL - Alarm latch
Select the state of the alarm lockout. ON or OFF.
To select an alarm latch:
Press the
OK
button to show the current value, then press the
button to choose ON or OFF.
Press the
button to confirm your selection and move to the next menu option.
6.3.7 Pur - Purge
It is used only when the probe is mounted in the blowdown line, and ensures the sensor
measures the TDS at boiler temperature. The time varies for different installations and is
adjustable from 0 - 99 seconds. The purge time is set to zero if the probe is installed in the boiler.
To select a Purge time:
Press the
OK
button to show the current value, then press the
button to increase each digit.
Press the
button to confirm your selection and move to the next menu option.
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