ITRON MTZ, Инструкция по эксплуатации, Страница: 6 / 44

may differ from that during normal me-
ter operations .
• The meter shall not be exposed to flames,
ionising radiation, and ultrasound .
• Pulse values and maximum frequen-
cies are given in Annex 1 . Electrical
characteristics and wiring of the socket
are given in Annex 4 . The wiring of the
transmitters is written on the name plate
of the meter .
5 Maintenance
When properly installed and put into ser-
vice, the MZ need no particular attention
and will provide you with many years of
satisfactory service .
5.1 Lubrication
Meters equipped with an oil pump have to
be periodically lubricated . Oil is delivered
with the meter . Specific oil has to be used,
for example
• Aeroshell fluid 12 MIL6085A
• Isoflex PDP38 (Klüber)
• Anderol 401D (Mobil Oil)
• Univis P38 (Shell)
Quantity of oil to be filled:
a) On commissioning to fill the volume
between the pump and the bearings
DN Oil vol . (cm
3
) Push
50/80 4 20
100 5 25
150/200 6 30
b) In Service
DN Oil vol . (cm
3
) Push
50/80 0,5 2-3
100 0,8 4
150/200 1,0 5
c) Recommended lubrication periodicity
Application
Lubrication periodicity
Dry gas, no dust 6 months
Gas comprising Monthly
light condensates
and little dust
Gas with high
Weekly
percentage
of condensates
and dust .
BIOGAS
applications
5.2 External silicagel cartridge
The meter can be equipped with an ex-
ternal silicagel cartridge for installation in
severe environment conditions . The car-
tridge has to be replaced when its colour
has changed . To replace the cartridge,
unscrew the old cartridge, remove the
protective plug of the new cartridge and
screw it into the totaliser .
5.3 Inspection and repair
It is possible to check the good function-
ing of the MZ by applying a spin test . This
test will give information about eventual
friction in the turbine ball bearings .
The test has to be conducted as follow:
• Accelerate the turbine wheel around 30
to 50% of Qmax then to measure the
time until the turbine wheel stops .
6