INFICON BPG402-Sx ATM to Ultra-High Vacuum Gauge - Manual (Page 8)

8
tina46e1-a (2010-03) BPG402.om
2 Technical Data
Measurement range (air, O
2,
CO, N
2
) 5×10
-10
… 1000 mbar, continuous
Accuracy
(after 10 min. stabilization) 15% of reading in the range of
1×10
-8 … 10 -2 mbar
Repeatability
(after 10 min. stabilization) 5% of reading in the range of
1×10
-8 … 10 -2 mbar
Gas type dependence → Appendix B
Switching on threshold
Switching off threshold 2.4×10
-2
mbar
3.2×10
-2
mbar
Emission current
p
≤7.2×10 -6
mbar
7.2×10 -6 mbar < p < 3.2×10 -2 mbar
5 mA
25 µA
Emission current switching
25 µA
⇒ 5 mA
5 mA
⇒ 25 µA
7.2×10
-6 mbar
3.0×10
-5
mbar
Filaments
Number
Means of selection
2
Controlled by gauge (default) or via
interfaces (
→ 33, [1] and [9])
Settling time of measurement signal
after filament change
Filament status
<4 s
LED, relay contact ( → 28)
Emission control mode
Automatic
Manual
Emission ON/OFF automatically
Emission ON/OFF by user via interfaces
(
→ 29)
Current (p <7.2×10 -6 mbar) ≈ 20 mA
Control input signal 0 V/+24 VDC, active high
(
→ 19, 20)
(control via RS232C → 30)
Duration <3 min., followed by automatic stop
In degas mode, the BPG402-Sx gauges keep supplying pressure readings, the
tolerances of which can be higher than during normal operation.
Degas acts only upon the active filament.
Output signal (measuring signal) 0 … +10 VDC
Measuring range +0.774 … +10 V
(5×10
-10
… 1000 mbar)
Relationship voltage-pressure logarithmic, 0.75 V/decade
(
→ Appendix A)
Error signal (
→ 42)
EEPROM error
Hot cathode error
Pirani error ≈ +0.1 VDC
≈ +0.3 VDC
≈ +0.5 VDC
Minimum load impedance 10 k Ω
BPG402-Sx 42 k Ω resistor between Pin 10 and Pin 5
(sensor cable)
Measurement
Emission
Degas
Output signal
Gauge identification