Siemens MAG 1100, Руководство по эксплуатации, Страница: 100 / 665

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SITRANS F M
3. Project guidance
3.2.1
Minimum conductivity
Applications Min. conductivity
Compact/remote
DN 2 & 3 (DN
≥
1 /
12
& 1 /
8
inch)
30
μ
S/cm
DN
≥
6 (DN
≥
¼ inch)
5
μ
S/cm
With empty pipe detection 50
μ
S/cm
Ex-installations
(Remote mounted only) 30
μ
S/cm
District heating systems
(Without DC cleaning unit) 250
μ
S/cm max. 150 ft
3.2.2
Liner selection guide
Liner Applications
Zirconium oxide ZrO
2
General purpose, agressive chemicals
Ceramics Al
2
O
3
General purpose, food and beverage, agressive chemicals
PFA General purpose, food and beverage, pulp and paper, chemicals,
high temperature and chemical resistance
Neoprene Water and wastewater and some chemical applications
EPDM Drinking water applications, (not hydrocarbons)
PTFE Chemical and general process industries, high temperature and
chemical resistance
Linatex
® ®
® ® ®
Abrasive media and mining slurries
Ebonite Drinking water applications, wastewater applications and certain
chemical applications
NBR: General purpose, Drinking water, sea water
3.2.3
Electrode selection guide
Electrodes Applications
AISI 316 Ti General purpose, water, sewage and district heating
Hastelloy C The preferred choice for water and wastewater, chemicals, food
and beverage, and pharmaceutical industries
Titanium Process and chemical industry which require a high corrosion
resistance
Tantalum Chemical industry with aggressive media
Platinum and platinum/irridium The ultimate electrode material unaffected by most liquids
3.3
Installation conditions
Reading and operating the flowmeter is possi-
ble under almost any installation conditions
because the display can be oriented in relation
to the sensor. To ensure optimum flow mea-
surement, attention should be paid to the fol-
lowing: