MeasUreMenT InsTrUMenTs

PRESSURE PUMP

complying with standard unI 11137:2012 / ± 15.000 pa

paramETErs

ranGEs

mEasurE prIncIplE

Gas family

plant is

compliance

with standards

safe plant but

maintenance

required

withing30 day

plant shutdown

292

manometer for test gas pipelines

MA202PT

The system performs pressure measurements, a direct tightness test and a leak rate

test. The MA402PT provides several methods for you to test pipelines and gas trains

that are filled with gas or air. The MA402PT standard leak procedure is particularly quick

and easy for the user. There is no need to disassemble a gas meter or gas train The

MA402PT uses the changes in pressure measured with and without the standard leak

to determine the leakage rate and volume in the gas line in just 10 to 15 minutes! The

serviceability check (gas safety check) meets the technical conditions of the new UNI

11137:2012. The leak test is fully automatic. In addition, the gas line to be tested is

connected to the MA402PT via just one pressure measurement hose. The pressure in

the gas line to be tested is automatically increased to 150 mbar by the measurement

system. The stabilization and measurement times correspond to UNI 11137:2012

calculaTED ValuEs

• Differential pressure

• Compensation in environment

• Calculation of plant piping volume

• Calculation of flow rate of dispersed air

• Calculation of flow rate of dispersed gas

sofTwarE DaTa

• Automatic zero calibration after switching on

• Free programming of all parameters by operator

EquIpmEnT

• Gate RS 232 for communication to PC

• Power feed by lithium batteries rechargeable from network

• Internal calendar and clock

• 25 measure reports tat can be stored

• Lithium batteries rechargeable

prIncIpal pErformancEs

• It reads the “maximum drop-out”

• Conversion into the different measure units (hPa, mmH

2

O, mmBar, Psi) possible

• Measuring of differential pressures

• Measuring of room humidity by probe (optional SO390)

• Displaying of testing time

• Temperature compensation in environment

• Storing of reports which can be personalised with users’ data

• Operating range: 50h

PRINTER

SEAL CONES

maxImum Error

± 1 Pa or 3% reading

± 1 Pa or 3% reading

DMS bridge

Semiconductor

Capacitive

Calculated

rEal ValuEs

Differential pressure

Chimney depression

Pressure

T° air

Humidity

Differential

ranGE

± 15.000 Pa

± 15.000 Pa

rEsoluTIon

1 Pa

1 Pa

± 15.000 Pa

-15...100 °C

0...100%

0...100%

Volume

0...100%

Calculated

It the plant proves to require maintenance or shutdown, then leak needs

be searched, repaired and the plant tested again conforming to the

Standard 7129-1.

paramETErs To usE for THE classIfIcaTIon of Gas planTs

I - II

III

Q ≤1 dm3/h

1<Q≤5 dm3/h

Q>5 dm

3

/h

Q>2 dm

3

/h

Q ≤0,4 dm3/h

0,4<Q≤2 dm3/h