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OPERATING MANUAL
VERSION 05/2017
ORDER NUMBER DOC 2357061
5.10.2 STROKE MEASURING
For piston pumps, the flow can be measured contact-free with stroke sensors (from
software version 4.0x / 4.0x K). For this, each pump must be equipped with a stroke sensor.
There are three types of stroke sensors:
Stroke sensor type Field of application
Working method
Stroke sensor short
e.g., IceBreaker pumps up to 70 cm3/DH
Detects the exact position of the piston.
Stroke sensor long
e.g., IceBreaker pumps up to 100 cm3/DH
Pressure sensor
Flushing pump
Detects the piston's upper and lower
reversal points.
1
2
3
4
1
2
3
1/
1
2
3
2/
A2
A1
B
A
B
A+B
1/3
1/1
1/2
2/1
B_04357
Touch screen /
controller
Ex zone
Non-Ex zone
Control cabinet
Stroke sensor
Pr
essur
e sensor
Piston pump
Stroke sensor
Example: 2K system with 4 pumps in
potentially explosive zone
Flushing
A/D Converter (ADC)
The analog stroke sensor signals are evaluated in an A/D converter (ADC) and converted
into digital signals. Up to four A/D converters, with three inputs each, can be used. The ADC
automatically recognizes, whether a stroke sensor or a pressure sensor is connected to its
inputs (1, 2, 3).
Multiplexer (MPX)
In the control cabinet, a multiplexer processes the A/D converter's digital signals and
transmits the signals, of the currently active pumps, to the controller.
