Axis Industries SDU-1M Technische beschrijving, gebruiksaanwijzing - Pagina 7
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Fig.1. Positioning of flow sensors: a) – not recommended position; b) and c) – recommended positions for flow
sensors with threaded end connection G1 1/4 (q
connection DN50 (q
p
7.10. The flange gaskets must mach with the pipe diameter. During the installation gasket must be
exactly centered with the center of the pipe cross-section to avoid sticking out gaskets inside the pipe.
7.11. The connection of the output pulse cable or battery power supply cable must be performed with
the grounded cables with signal wires with the cross-section not less than 0.12 mm
be laid at least 0,5 meter from the high voltage power cables. The connection terminals and wiring of
signal cables is presented in appendix B. It is recommended to use cable with external diameter of
4...6 mm.
7.12. Connection of power supply:
-
See connection diagram in appendix B2 if flow sensor is powered from external source,
-
Connect battery connector to contact BAT if flow sensor includes inner lithium battery
(Appendix B1).
7.13. After installation flow sensor in the pipeline check the device status that is indicated via LEDs
(after pushing the test button) and corresponding status on the indicator of heat/flow energy calculator.
IMPORTANT !
- Sensor can be installed in the pipeline only after completing welding works.
- It is prohibited to carry out welding works on the pipeline, in which is mounted flow sensor.
8.1.
It is recommended to perform calibration and testing of the flow sensor in the „Test" mode.
The „Test" mode is set on by placing the 2,54 mm contact pitch jumper on the 13-14 pins in contactor
J1. The contactor J1 is located under the cover on the right side in PCB board (Appendix B3).
8.2.
For measuring the quantity of the output pulses during the flow sensor calibration it is
recommended to use passive output pulse transmission mode (open drain electrical connection). This
mode is set on by placing the jumper JP on the 2 - 3 pins. (see p.2.6.1. and appendix B3).
8.3.
The recommended minimal quantity of the output pulses and measurement duration for flow
sensor operation modes:
Flow
0.1 q
<q ≤ q
p
s
qi ≤ q ≤ 0.1 q
p
The both conditions must be satisfied by performing the calibration and testing.
8.4.
After the testing and calibration procedures the "Test" mode must be off by removing the
jumper from the pins 13-14 in contactor J1. The access to the inner contactors in PCB board must be
protected with the cover. The screw of the cover must be sealed with calibration seal.
PESDU1M02 (MID)
a
b
3
= 15,0 m
/h); d) recommended position for flow sensors with flanged connection DN65,
DN80, DN100 (q
8. CALIBRATION
Pulse quantity
N≥1000
N>500
c
3
= 3,5 m
/h and 6,0 m
p
= 25,0 m3/h.... 60,0 m3/h).
p
Measurement duration of
in "Test" mode
T> 2 [min]
T > 2 + 8 q
/q, [min],
i
d
3
3
/h), G2 (q
= 10,0 m
/h) and flanged
p
2
. These cables must
Measurement duration in
working mode
T> 5 [min]
T > 5 + 10 q
/q, [min],
i
7