Flintec FT-10xx - Manual (Page 13)

FT-10 Smart Process Indicator, Technical Manual, Rev. 1.0, January 2014
4. I
NSTALLATION
PRECAUTION: Please read this section carefully before installation of the instrument. Applying the
recommendations in this section will increase your system reliability and long term performance.
4.1 Recommendations
Please follow the installation and commissioning steps described below carefully to prevent unwanted results
after installation.
4.1.1 Control Cabinet Design
Warning: Please care the following warnings for designing the control cabinet which will increase your
system reliability.
The control cabinet should be designed so that Analog Digitizer can operate safely. The panel should be
placed in a clean area, not getting direct sun light if possible, with a temperature between -10 ºC and +40 ºC,
humidity not exceeding 85% non-condensing. All external cables should be installed safely to avoid
mechanical damages.
FT-10 instruments are very low level signal measuring instruments. To avoid electrical noise, FT-10 should
be separated from the equipments that produce electrical noise. Preferable use metal cabinet against radio
frequency interference and the cabinet shall be connected to ground against the electromagnetic
disturbances. Load cell cable trays must be separated from others, if possible. If there are noise-generating
equipments such as heavy load switches, motor control equipments, inductive loads etc., please be careful
against the EMC interference in the cabinet. If possible protect FT-10 instruments with the faraday cage or
install them in separate section or install them far away from this kind of equipments. Connect parallel
reverse diodes to the DC inductive loads like relays, solenoids etc. to minimize voltage peaks on the DC
power lines.
4.1.2 Cabling
All cables coming to the control cabinet shall be shielded. Please use separate cable tray for these low
signal level cables. Distance from load cell cables, interface cables and DC power supply cables to power
line cables shall be minimum 50 cm.
4.2 Mechanical Installation
Take care to the housing dimensions and the suggested panel hole dimensions given in the Page 11. To
avoid electrical noises, protect your indicator which has very low input signal level from the equipment that
produces electrical noise in panel mounting.
4.3 Electrical Connections
Warning: Please always remember that FT-10 instruments are very low voltage measuring instruments.
Your control cabinet design and proper installation increases reliability and performance of the instrument.
Please do not forget that the instrument must be powered off before inserting or removing any peripheral
connector.
The electrical installation and quality of instrument’s grounding will provide weighing accuracy and the safety
of your indicator. If the energy condition of your plant is bad, prepare a special power line and grounding. All
required electrical connections should be done as described below.
If you have to service the indicator, turn the power off and wait at least 30 seconds before interfering.