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Installation
Mounting
• Open-end spanner 60 AF
• Screwdriver, blade width 5...6 mm or
Phillips screwdriver PZD 2
Compare the order code on the nameplate of your instrument with the order
specification key to ensure that the correct instrument is being installed.
FTC 831 capacitive level limit switch with rod probe
Probe
1 ...mm probe length
Probe lengths from 500 to 20000 mm, selectable
2 2500 mm (basic length, can be shortened)
6 6000 mm (basic length, can be shortened)
9 Others - check special version
Housing
A Aluminium housing, IP 55
B Aluminium housing, IP 66
R Aluminium housing, coated, IP 66
K PBTP synthetic housing, IP 66
Y Others - check special version
Electronic Insert (mounted in housing)
1 21 V...250 V, 50/60 Hz (EC 40)
Two-wire AC connection
2 PNP 10 V...55 V= (EC 42)
Three-wire DC connection
3 NPN 10 V...55 V= (EC 43)
Three-wire DC connection
4 Relay, 21 V...250 V AC/200 V= (EC 44)
AC or DC connection
with relay output (change-over contact)
9 Others - check special version
Order code on nameplate
FTC 831
Check that the probe is the correct length for the installation point and
application.
The length of the Nivocompact FTC 831 probe at delivery is stated on the
nameplate.
The probe may be shortened if it is too long. Refer to Section: »Shortening
the Cable« at the end of this manual.
• Place the elastomer/fibre gasket which is supplied against the sealing
surface of the Nivocompact. (Do not apply sealing material around the
thread!)
• Straighten out the cable at the lower end.
• Feed the cable carefully through the threaded boss making sure that the
insulation is not damaged.
• When screwing in the Nivocompact, turn the instrument by the 60 AF nut
only!
• If the instrument will not turn easily, then slightly cut into the thread of the
boss.
• A torque of 80 Nm...100 Nm is normally sufficient to produce a reliable
seal to withstand pressures up to 6 bar.
A torque of more than 120 Nm will destroy the plastic thread.
Tools Required for Mounting
Preparation
Screwing In
11
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