Sigma S2Ba, S2Ca warranty ÒAuxiliary frequencyÓ function, ÒFlowÓ function, ÒFloat switchÓ function

Features of the S2Ca metering pumps Dulcodes UV-Desinfektionsanlage

ÒPROFIBUS®Ó mode: (Identity code, control variant: PROFIBUS®)

This operating mode provides the option of controlling the pump via the PROFIBUS® (see

“Supplementary instructions for ProMinent® gamma/ L and ProMinent® Sigma versions with “PROFIBUS®”).

Functions The following functions can be selected using the SET menu:

ÒCalibrateÓ function (Identcode, stroke length adjustment: manual + calibration):

The S3Ca can be operated in all operating modes including in calibrating mode. The corresponding continuous displays can show the actual feed quantity or the feed rate. Calibration is maintained within the stroke frequency range 0-180 strokes/ min. Calibration is also maintained when a stroke frequency is altered up to ±10 % scale divisions.

ÒAuxiliary frequencyÓ function:

It is possible to set a stroke rate in the SET menu, which may be activated via the “external control” terminal. This auxiliary frequency overrides all other pre-set stroke rate frequencies.

ÒFlowÓ function:

Stops the S2Ca when the flow is insufficient. In the SET menu, the number of failed strokes is entered after which the pump will be turned off.

The following functions are available as standard:

ÒFloat switchÓ function:

Information on the liquid level in the feed chemical container is transmitted to the S2Ca. This option requires the installation of a 2-stage float switch. This is connected to the “float switch” terminal.

ÒPauseÓ function:

The S2Ca can be stopped by remote control via the “external control” terminal. The “pause” function operates only via the “external control” terminal.

The following functions are activated by keystrokes:

ÒStopÓ function:

The S2Ca can be stopped by pressing the STOP/START key without disconnecting from the mains power supply.

ÒPrimeÓ function:

Priming (short term feed at maximum frequency) is activated by pressing both arrow keys at the same time (in “Stroke rate” permanent display).

Optional relay The S2Ca has two connection options (not in PROFIBUS® version).

Optional Òfault-indicating relayÓ or Òpower relayÓ:

In the event of fault signals, warning signals or float switch activation signals, connects an electrical circuit to trigger alarm sirens etc. The relay is retrofitted via an aperture in the power end.

ÒFault indicating and pacing relayÓ option:

In addition to the fault indicating relay the pacing relay can make a contact with every stroke.

The relay is retrofitted via an aperture in the power end.

Function and error

indicators The operating and error status is shown via the three LEDs and the “error” indicator on the LCD (see also section 9):

LCD indicator If a fault occurs “error” will appear along with an additional fault warning.

LED indicator Operating indicator (green)

This indicator is lit as long as the S2Ca is operating correctly. It goes out briefly with every stroke.

Warning indicator (yellow)

This warning light appears if the S2Ca electronics detect a situation that could lead to a fault, e.g. “liquid levels low 1st stage”.

Error indicator (red)

This warning light appears if a fault occurs, e.g. “liquid levels low 2nd stage”.

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