Edwards Barocel 7025, Instruction Manual

Page: 12 / 32

Page 10
W602100880_A - Technical data
WARNING: HIGH VOLTAGE
Risk of electrical shock. The gauge can only be connected to power supplies, instruments
or control devices that comply with the requirements of a grounded Protective Extra-Low
Voltage (PELV) and Limited Power Source (LPS), Class 2. The connection to the gauge has
to be fused.
Table 5 Electrical
Supply voltage
at the gauge +14 to +30 V d.c.
Class 2/LPS
ripple

1 V
pp
Current consumption < 500 mA (maximum starting current)
Power consumption (supply voltage
dependent)
 1 W
Fuse required
*
*
The gauge is protected against reverse polarity of the supply voltage.
1 AT (slow), automatic reset (Polyfuse)
Electrical connection 15-pin D-Sub, male
Sensor cable
without switching functions 5-pin plus shielding
with switching functions 9-pin plus shielding
Cable length
§
§
For longer cables, larger conductor cross-sections are required (R
cable
 1.0 
 100 m (0.14 mm² conductor)
Grounding concept
Vacuum flange - signal common See Electrical connection on page 15
Supply common - signal common Conducted separately for differential
measurement (10  )
Table 6
Materials exposed to vacuum
Materials exposed to vacuum
Flange, tube Stainless steel AISI 316L
Sensor and diaphragm Ceramics (Al
2
O
3

99.5%)
Internal volume  3.6 cm
3
Admissible pressure (absolute)
 200 Torr/mbar (F.S.) 4.0 bar (400 kPa)
1 to 100 Torr/mbar (F.S.) 2.6 bar (260 kPa)
0.1 Torr/mbar (F.S.) 1.3 bar (130 kPa)
Bursting pressure (absolute) 5.0 bar (500 kPa)