17
Commissioning
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In the parameter
1. Setpoint
set the switchpoint for the continuous blowdown valve to open.
The continuous blowdown valve closes once the conductivity falls below the limit and the adjusted
hysteresis.
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In the parameter
2. MAX limit
set the switchpoint for the triggering of an alarm or the operation of a
three-way valve.
Correcting the measured value (connected conductivity electrode LRG 16-9 with Pt 100)
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Set parameter
4. PT 100
to ON.
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Once the operating temperature is reached measure the electrical conductivity of a water sample
(at 25 °C). In the parameter
4.1 TK
set the temperature coeffienct (in increments) until the indicated
actual value agrees with the measured value.
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During operation the indicated conductivity reading may deviate from the reference value due to
e. g. dirt deposits or contamination. In this case change the correction factor (in steps) in the
parameter
3. Correction of measured value
until the indicated actual value agrees with the
measured value for water.
Correcting the measured value (connected conductvity electrode type ERL, LRG without Pt 100)
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Set parameter
4. PT 100
to OFF.
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Once the operating temperature is reached measure the electrical conductivity of a water sample
(at 25 °C). In this case set the correction factor (in steps) in the parameter
3. Correction of
measured value
until the indicated actual value agrees with the measured value for water. The
conductivity measuring equipment will now be adapted to the conditions of the installation.
Setting further parameters
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The electrical conductivity is measured in μS/cm. In some countries ppm (parts per million) is used
instead. Conversion: 1 μS/cm = 0.5 ppm. In parameter
5. Unit
you can specify the desired unit of
measurement. This unit setting is then applicable for all conductivity readings and settings. If you
choose ppm as unit of measurement, please use a waterproof felt-tip pen to write the unit on the
housing of the equipment.
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In the parameter
6. Standarization of current output
set the final value (20 mA) to 10, 200, 500,
1000, 6000, 9999 μS/cm or 5, 100, 250, 500, 3000, 5000 ppm.
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To prevent the continuous blowdown valve from blocking set the
time
for the opening and closing of
the continuous valve in the parameter
7. Purging interval
. You can adjust intervals from 1 h to
24 hours in steps of 1 h. If the setting OFF is chosen, the blowdown valve will not be operated.
The purging interval will be initialised again whenever the conductivity switch is switched off and on.
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If a purging interval has been activated set the time for the operation of the continuous blowdown
valve in the parameter
7.1 Duration of purging
. You can adjust a duration ranging from 1 to 6
minutes in steps of 1 min.
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If you want to quit the parameter setting mode press button
P
. The equipment switches back to the
beginning of the menu.
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Press button
E
to save the new values or settings. The word SAVE is indicated for approx. 1 sec.
Then the equipment switches back to the beginning of the menu.
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Press button
P
to switch back to the default operating mode (indication of actual value).
Or use buttons
to select another parameter.
Setting parameters
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