WIKA WU-20 Mode D'emploi page 17

7. Starting, operation
Specifications
Pressure ranges
Overpressure safety *
)
Burst pressure *
)
Pressure ranges
Overpressure safety *
)
Burst pressure *
)
Measuring principle
Materials
Wetted parts
■
- Pressure Connection
- Pressure sensor
Case
■
Inboard helium leak test
Surface finish
Dead volume
Permissible Medium
Power supply U+
Signal output and
maximum ohmic load RA
Power Pmax
Adjustability zero
WIKA operating instructions, model WU-2x
Models WU-20, WU-25 and WU-26
psi 30 60
bar 2 4
psi 120 120
psi 1,800 1,800
psi
bar
psi
psi
Other pressure ranges, pressure units (e.g. MPa, kg/cm
)
* 1 psi = 0.069 bar
Metal thin-film sensor
316L stainless steel, according to SEMI F20 (option: 316L VIM/VAR)
2.4711 / UNSR 30003
304 SS
-9
< 1 x 10 mbar l/sec (atm STD cc/sec) according to Semi F1
Electropolished, typical Ra ≤ 0.13 µm (RA 5); max. Ra ≤ 0.18 µm (RA 7) exceeds
Semi F19
cm WU-20 < 1.5, WU-25 < 1, WU-26 < 1
3
Speciality gases, vapours, liquids
U+ in VDC 10 ... 30 with output signal 4 ... 20 mA / 0 ... 5 V
14 ... 30 with output signal 0 ... 10 V
RA in Ohm 4 ... 20 mA, 2-wire
0 ... 5 V, 3-wire
0 ... 10 V, 3-wire
W 1
% of span -3.5 up to +3.5 (via potentiometer) Current output signal
-2 up to +3.5 (via potentiometer) Voltage output signal
WU-20 / WU-25
WU-26
100 160 250 350
7 11 17 25
210 320 500 750
2,200 2,600 4,800 6,200
2,000 3,000
145 225
4,200 6,600
10,500 10,500
) and absolute pressure on request
2
RA ≤ (U+ – 10 V) / 0.02 A
RA > 5 k
RA > 10 k
500 1000 1,500
36 70 100
1,100 2,100 3,000
5,800 8,000 10,500
5,000
360
10,500
12,000
17
EN