Motor-driven pumps

Sigma/ 1 Sigma/ 2 Sigma/ 3

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Control Type Features

Stroke length adjustment from 0 - 100% Digitally accurate stroking rate via keypad LC display Two-stage level switch input Flow monitor input External control via Pulse Control External control via 0/4-20mA signal

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Extended control options, e.g. free combination of mA/frequency ratio

Real stroke length measurement Easy pump calibration

Direct setting gph or lph Warning when leaving the calibrated range (+/- 10%)

New relay types: Warning, switch-off, power

Analog output for capacity Timer + program design software Profibus DP Programmable via PC

New Features Control Type

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Large illuminated LC display Quick change of display information

e.g. gph or stroke frequency Display of stroke length in % Optical indication of operation status (3 LED´s)

Display

i

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Removable power cord Retrofit relays:

Warning Switch-off Power Fault indicating relay Pacing relay

Relay combinations: Fault indication + pacing Switch-off + pacing

Diaphragm failure detector

Modular Design

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Speed Control

Microprocessor controller with an optimum combination of speed control and Stop/Go

operation offers an extensive control range with selective fine tuning

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Sigma/ 1 from 5 to 32 gph,

Sigma/ 2 from 15 to 111 gph,

Sigma/ 3 from 45 to 264 gph.

Three performance ranges –

one unified technical concept

based on the economical modular principle

Three performance ranges

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The overlapping pump performance ranges cover an extraordinarily wide spectrum.

The modular principle:

Many of the components employed in the Sigma range are identical and can be used throughout the series = simplified spare parts management less stockholding

Identical operating systems for all three pumps in the Sigma series = less training of users less danger of misuse more effective and safer function monitoring

THREEFOLD SIMPLICITY

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Sigma/ 1

Base can be turned90°

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Microprocessor control

optimum combination of speed control and digital stroking frequency.

easy-to-use operating menu

Display of all functions via the back-lit LCD display.

Proven precision

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frequency

display

open programming menustart /stopchange display info

relay; Profibus

external signals

ON / OFF

mains cable

Sigma Control VersionIntegrated operation panel

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Maximum safety:

the dual DEVELOPAN® diaphragm with sensor in the inter-diaphragm cavity guarantees effective protection even in the event of a diaphragm rupture.

Continous working with safety diaphragm

No process interruption

Dual DEVELOPAN® diaphragm with sensor

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push rod

return spring

worm gearuptake fork

eccentricmotor flange

stroke lengthadjustment

innerhousing

Plastichousing

Design and functionDrive

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Sigma pumps control types

multiple easy external control

Two-stageLevel switch

External Signals1. Potentially free contacts2. mA3. Profibus DP

Flow-monitor

Relay options:fault indicating, warning,switch-off; pacingmA output signal forCapacity in gphProfibus DP

“Pause” Remote ON/OFF Auxiliary frequency independently switchable frequency

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Sigma Control Version - integrated frequency inverter

feedback signal from stroke sensor

InternalControl

Contact signalsmA signals

Control of thestroke number

1 stroke is performed with the same speed as with a frequency of 60 strokes / min.:1 stroke/s, i.e. the stroke volume stay constant

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Sigma Control VersionControl of the stroke number

Pump with integrated stroke sensor Stroke sensor gives a feedback signal

for every sucessfully performed stroke The real speed is equal to the control signal

and the theoretically calculated stroke number Speed = Desired stroke number = Desired volume The frequency is varied under load until the

stroking rate equals to the theoretically calculated value

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Sigma’s PROFIBUS® interface

enables full integration of meteringtechnology into a PROFIBUS® processor control system.

Sigma with professional PROFIBUS®-DP functionality

Minimum installation costs – maximum operating safety

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Profibus DP

Probe Level

Sensor/Actor Level