Granville-Phillips Micro-Ion 354 E Series, Инструкция по эксплуатации, Страница: 44 / 54

Appendix A
44
Micro-Ion E Module Instruction Manual 354011, Rev. A
Outputs and Indicators
Module with Analog Output
Analog Pressure Output
Logarithmic, 0 to 9 Vdc, 1 volt per decade
Pressure Measurement unit Torr, Pa, or mbar
Micro-Ion E Gauge
ON/OFF
Open collector transistor output is rated for 40 Vdc, 50 mA maximum.
• Output is low (“sink”) when Micro-Ion E gauge is ON.
• Output is high (“source”) when Micro-Ion E gauge is OFF.
Module with RS–232 Output
RS–232 Pressure Output RS–232 output indicates N
2
or air pressure in Torr.
• Two significant digits, 1-digit exponent, and + or – sign for exponent.
• If vacuum pressure exceeds 1 x 10 –2 Torr (1.33 Pa, 1.33 x 10 –2 mbar),
output indicates pressure value of 9.99E+09.
Pressure Measurement unit Torr
Interface
RS–232 two-wire, half-duplex
Communications Format ASCII format, eight data bits, no parity, one stop bit
Baud Rates
1200, 2400, 4800, 9600 (default), or 19200 baud
LED Status Indicator
Module status indicator lights up to indicate module status:
• LED is solid green to Micro-Ion E gauge is ON.
• LED is solid amber if Micro-Ion E gauge is OFF.
• LED is solid red to indicate Micro-Ion E gauge fault condition or
overpressure shutdown.
Micro-Ion E Gauge
Emission Current
10
μ
A
Filament
One Yttria-coated iridium filament
Filament Bias
30 Vdc ± 0.5 V
Grid Bias
180 Vdc ± 5 V
Sensitivity to N
2
14/Torr
0.105/Pa
10.5/mbar
Internal Volume
10.8 cm 3 (0.66 in. 3 )