Maintenance; Transmitters - ITT Controls MTS Serie Betriebsanleitung

pipe, therefore sufficient ventilation is
required.

4 Maintenance

The meter doesn't require any mainte-
nance.
• Please use solvent and alcohol free
product to clean the meter.
• Repair must be done only by quali-
fied personal. Afterwards a tightness
test with 1.1 x PS must be perfor-
med.
• When changing pressure containing
parts, ensure that spare parts that
comply with the PED are used.

5 Transmitters

The transmitters are intrinsically safe
following II 1/2 G EEx ia IIC T5.
Remarks about using the meter in po-
tentially hazardous areas (ATEX)
• Pulse transmitters must be connec-
ted to circuits intrinsic safe circuits,
according to EN50020.
• All exposed aluminium parts must be
suitably protected (using paint, var-
nish, etc) if a film of rust is possible
from dust in the environment.
• The meter must be earthed.
• Tools used for installing, removing, or
repairing the meter on site must be
appropriate for use in the hazardous
area bearing in mind that the hazar-
dous area classification during meter
replacement may differ from that du-
ring normal meter operations.
• The meter shall not be exposed to
flames, ionising radiation, and ultra-
sound
Low frequency transmitter:
MTS meters are equipped as standard
with a double LF transmitter.
• Pulse values and frequencies: see
annex 1
• The LF transmitters have no polarity
and the connection can be done with
a cable of diameter from 4 to 8 mm.
See annex 1
High frequency transmitter:
MTS meter may be supplied with an HF
transmitter if requested when the me-
ter is ordered.
• Pulse values and frequencies: see
annex 1
• The HF transmitter is an inductive
sensor conform to EN50227.
• The HF transmitter is polarised (+:
brown; -: blue) and the connection
can be done with a cable of diame-
ter from 4 to 8 mm. See annex 1
5