Agilent Technologies XGS-600 - Page 20

XGS-600 Gauge Controller
20
DRAFT 4/
15/14
✔
IMG-100
Inverted
Magnetron
Most durable and fastest
responding HV gauge (cold
cathode)
• General purpose-measures to 2 x 10-9 Torr
• Small, reliable, extremely rugged - Will not burn out
• Very fast response - < 20 milliseconds
• Less accurate and repeatable than hot filament
• Longer starting in high vacuum than a hot filament
• Can be cleaned
✔
FRG700/702 Combination full range gauge • Active gauge - Pirani/Cold Cathode
✔
FRG720/730 Combination full range gauge • Active gauge - Pirani/Hot Filament
Ultra High 10-9 to 10-12
✔
IMG-300
Inverted
Magnetron
Most durable and fastest
responding UHV gauge
(cold cathode)
• Measures to 1 x 10
-11
Tor r
• Bakeable with magnet to 250 °C
• Bakeable without magnet to 450 °C
• Reliable, rugged, will not burn out
• Can be cleaned
✔
UHV-24
(nude)
Most popular UHV gauge
(hot filament)
• Measures to 1 x 10
-10
Tor r
• Bakeable with magnet to 250 °C
• Thoriated iridium filaments run cooler - less outgassing
• Dual tungsten filaments run hotter -
More outgassing but measurements are more accurate
and repeatable
✔
UHV-24p
(nude)
UHV gauge providing the
highest vacuum reading
• Same as UHV-24 except it measures to 2 x 10
-11
Tor r
Table 2-2 Gauge Selection Chart (Continued)
Controller Gauge Card
Vacuum Regime
Convection Hot Filament Cold Cathode Analog
Gauge
Type Recommendation Gauge Characteristics
CHMA