Siemens SITRANS LG250 Operating Instructions Manual page 69

Second Line of Defense (optional)
Ʋ The Second Line of Defense (SLOD)
is a second level of the process
separation in the form of a gas-tight
feedthrough in the lower part of the
housing, preventing product from
penetrating into the housing.
Ʋ Supporting material
Ʋ Glass potting
Ʋ Contacts
Ʋ Helium leak rate
Ʋ Pressure resistance
Conductive connection
Process fittings
Ʋ Pipe thread, cylindrical (ISO 228 T1)
Ʋ Pipe thread, conical (ASME B1.20.1)
Ʋ Flanges
Weight
Ʋ Instrument weight (depending on
process fitting)
Ʋ Rod: ø 8 mm (0.315 in)
Ʋ Rod: ø 12 mm (0.472 in)
Ʋ Cable: ø 2 mm (0.079 in)
Ʋ Cable: ø 4 mm (0.157 in)
Ʋ Gravity weight for cable ø 2 mm
(0.079 in)
Ʋ Gravity weight for cable ø 4 mm
(0.157 in)
Ʋ Centering weight ø 40 mm (1.575 in)
Ʋ Centering weight ø 45 mm (1.772 in)
Ʋ Centering weight ø 75 mm (2.953 in)
Ʋ Centering weight (ø 95 mm (3.74 in)
Probe length L (from seal surface)
Ʋ Rod: ø 8 mm (0.315 in)
Ʋ Rod: ø 12 mm (0.472 in)
Ʋ Trimming accuracy - rod
Ʋ Cable: ø 2 mm (0.079 in)
Ʋ Cable: ø 4 mm (0.157 in)
Ʋ Trimming accuracy - cable
Lateral load
Ʋ Rod: ø 8 mm (0.315 in)
Ʋ Rod: ø 12 mm (0.472 in)
PBD-51041053
316L
Borosilicate glass GPC 540
Alloy C22 (2.4602)
< 10 mbar l/s
-6
See process pressure of the sensor
Between ground terminal, process fitting and probe
G¾, G1, G1½ (DIN 3852-A)
¾ NPT, 1 NPT, 1½ NPT
DIN from DN 25, ASME from 1"
approx. 0.8 ... 8 kg (0.176 ... 17.64 lbs)
approx. 400 g/m (4.3 oz/ft)
approx. 900 g/m (9.68 oz/ft)
approx. 16 g/m (0.17 oz/ft)
approx. 60 g/m (0.65 oz/ft)
100 g (3.22 oz)
200 g (6.43 oz)
180 g (5.79 oz)
250 g (8.04 oz)
825 g (26.52 oz)
1050 g (33.76 oz)
up to 6 m (19.69 ft)
up to 6 m (19.69 ft)
±(1 mm + 0.05 % of the rod length)
up to 75 m (246.1 ft)
up to 75 m (246 ft)
±(2 mm + 0.05 % of the cable length)
10 Nm (7.38 lbf ft)
30 Nm (22.13 lbf ft)
SITRANS LG250 - Operating Instructions
69