Agilent Technologies UHV-24, Инструкция по эксплуатации

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UHV-24/UHV-24p Ionization Gauge
DRAFT
13
Operating Specifications
Table 1 Normal Operating Requirements
Item Requirement
Filament Voltage 3 to 4.5 V (AC or DC) - Varies with pressure and emission
current
Filament Current 2.5 to 3.5 A - Varies with pressure and emission current
Element Voltages Collector voltage: V
c
= 0
Filament voltage: V
fil
= 28 VDC
Grid voltage, V
g
= +180 VDC
Degas Power
Requirements (40 W) Grid Voltage: +600 VDC max
Emission Current (total): 67 mA DC
Filament Voltage: 7 V
Measurement
Specifications Sensitivity:
❑
25/Torr (UHV-24), nominal
❑
20/Torr (UHV-24p), nominal
Emission Current:
❑
4 mA for widest measurement range 5x10-
10
Torr to
1x10
-4
Torr
❑
10 mA for pressures lower than 5x10-10 Torr

0.1 mA
for pressure over 1x10
-4
Torr
Materials Filament: Tungsten or thoria-coated Iridium
Filament Supports: SST
Collector - tungsten:
❑
0.007" diameter for UHV-24
❑
0.002" for UHV-24p
Grid: SST
Feedthrough: SST, Alumina, Nickel Alloy