DRESSER MZ 002-099-4115 Manual De Instrucciones página 7

• Measure the spin time (ST) until the turbine
wheel stops .
See Annex 5 for typical values of spin time .
The following recommendations have to be
observed for repair:
• In case of use with aggressive or dangerous
gas, it may be necessary to send a safety
statement with the meter, detailing the type
of Gas that has been measured .
• Some gas may still be present inside the
meter and the pipe; therefore sufficient ven-
tilation is required .
• Repairs and maintenance must be done by
trained or qualified personal . Afterwards a
tightness test with 1 . 1 x PS (Pmax) must be
performed .
• When changing pressure-bearing parts,
ensure that spare parts which comply with
the PED are used .
• If used with wet gas, internal and external
effect of corrosion has to be checked regu-
larly and in case of severe corrosion, the
meter must be replaced .
• Use solvent and alcohol free cleaning pro-
duct to clean the meter .
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