WIKA WU-20 Manual De Instrucciones página 14

7. Starting, operation
Specifications
Pressure ranges
Over pressure safety *
)
Burst pressure *
)
Pressure ranges
Over pressure safety *
)
Burst pressure *
)
Measuring principle
Materials
Wetted parts
■
- Pressure Connection
- Pressure sensor
Case
■
Particle test
Inboard helium leak test
Surface finish
Dead volume
Permissible Medium
Power supply U+
Signal output and
maximum ohmic load RA
Power Pi
Adjustability zero
14 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio, WU-2X
Models WU-20, WU-25 and WU-26
psi 14.5 25
bar 1 1.7
psi 120 120
psi 1800 1800
psi
bar
psi
psi
Other pressure ranges, pressure units (e.g. MPa, kg/cm
)
* 1 psi = 0.069 bar
Metal thin-film sensor
316L VIM/VAR
2.4711 / UNSR 30003
304 SS
≤ 0.1 µm Particle 0.1 ptc / ft³ according to Semi E49.8
-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
Special gas / Vapour / Liquid
U+ in VDC 10 ... 31 with output signal 4 ... 20 mA / 0 ... 5 V
14 ... 31 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
60 100 160 250
4 7 11 17
120 210 320 500
1800 2200 2600 4800
2000
145
4200
10500
) and absolute pressure on request
2
RA ≤ (U+ – 10 V) / 0.02 A
RA > 5 k
RA > 10 k
GB
350 500 1000 1500
25 36 70 100
750 1100 2100 3000
6200 5800 8000 10500
3000 5000
225 360
6600 10500
10500 12000