Etatron eSelect M 1 CD COOL, Инструкция по эксплуатации и техническому обслуживанию

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Purge SV Solenoid Valve control
The instrument eSelect M – CD COOL offers two modes for purge operations (water drain) of the SV.
TIMER mode: for easy programming or in case of conductivity probe fault, the operator may enable the Timer mode; the SV is driven by the
internal timer regardless of the conductivity reading in the cooling tower.
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Mode Selection
Selects the operational mode to drive the purge SV: the two modes are via Timer built into the instrument
or via the Conductivity measurement.
Cycle time Selects the intermediate time between two purge operations.
Cycle duration Selects the opening cycle of the purge SV.
Flow Sensor
Enables or disables the Flow sensor function (proximity probe).
Max Manual Time
Overwrites the previous SV programming (timer or conductivity), selecting the maximum SV opening time
and manual start-up(next step). It isasafety measure inthecasewheretheoperator openstheSVvia
the Max manual programming and forgets to close it.
Manual ON / OFF start-up
Supersedes the previous Max Manual Time programming and SV programming (timer or conductivity).
The operator manually selects when the SV is ON and OFF. "Manual ON / OFF start-up" only works if the
previous function" Max Manual Time" has been programmed.
CONDUCTIVITY mode: processes the conductivity level to control purge operations; the displays show the measured EC values and drives the
relay output connected to the SV solenoid valve. Electroconductivity is monitored by a setpoint: once this is reached, the instrument commands
solenoid valve opening and drains the desalinated and conditioned water. NOTE: for EC conductivity measurements, the display shows μS
values up to 1999 (micro Siemens), then they change automatically into mS (milli Siemens) above the value of the latter
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Mode Selection
Selects the operational mode to drive the purge SV: the two modes are via Timer built into the instrument
or via the Conductivity measurement.
High Setpoint Sets the setpoint at the highest value, after reaching which the relay closes (opens the SV)
Low Setpoint Sets the setpoint at the lowest value, after reaching which the relay opens (closes the SV)
Max opening time
Maximum opening time of the purge valve: it is a safety mode that replaces the conductivity measurement
in the event of EC probe fault or other defects.
Max Alarm
If the EC measurement exceeds the selected Max value, the relay is closed andthe alarm message is
displayed. The alarm isindependent ofthechosendirection (direct / reverse), viarelay 4,it controls an
external signalling device.
Min alarm
If the EC measurement is below the selected min value, the relay is closed and the alarm message is
displayed. Thealarm isindependent ofthe chosendirection (direct / reverse), viarelay 4,it controlsan
external signalling device.
Direction
Direct ,theoutput isactivewhenthemeasuredvalue islowerthantheselectedsetpoint. Reverse ,the
output is active when the measured value is higher than the selected setpoint
Flow Sensor
Enables or disables the Flow sensor function (proximity probe).
Max Manual Time
Overwrites the previous SV programming (timer or conductivity), selecting themaximum SV openingtime
and manualstart-up(next step). It isasafety measureinthecasewheretheoperatoropenstheSVvia
the Max manual programming and forgets to close it.
Manual ON / OFF start-up
Supersedes the previous Max Manual Time programming and SV programming (timer or conductivity).
The operator manually selects when the SV is ON and OFF. "Manual ON / OFF start-up" only works if the
previous function" Max Manual Time" has been programmed.
ON-OFF mode: The unit features an ON-OFF mode which activates (or deactivates in the event of reverse mode ON) the output relays
connected to the ON-OFF equipment such as SV (solenoid valve).
RELAY 4 ON-OFF RELAY OUTPUT: The relay 4 output may be connected to the alarm device (buzzer or light) or to other equipment.
ADVANTAGES: increases safety measures providing an alert if the parameters are out of control.
MIN / MAX ALARM: The Alarm function makes it possible to select the minimum and maximum values outside which the instrument goes into alarm mode.
To restore the alarm function, wait for the measurement to go back to the setpoint
ADVANTAGES: increases the safety measures assuring an alert if the parameters are out of control.
PROGRAMMING FUNCTIONS