Used Varian Leak Detector
990 dCLD Component Helium Leak Detector
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The spectrometer assembly contains a dual-thoriated filament ion source, analyzer assembly, detector with preamplifier, rough and high-vacuum gauging, and the high-vacuum pump. Testing with the 990 dCLD is accomplished by connecting a test fixture and valves to the foreline of the spectrometer's high vacuum Turbo or MacroTorr pump. The Turbo configuration allows test pressures of up to 500 mTorr, while the MacroTorr tests to over 5 Torr.
Configuration setups and diagnostics can be performed using the 990 dCLD's rear panel serial interface, or by local front panel connection to a hand-held setup/display pendant.
Features
- Component-type spectrometer unit
- Discrete I/O and bi-directional RS232 leak rate outputs
- Automatic spectrometer tuning and calibration
- Front panel RS-232 connector
- Dedicated thermocouple and ionization gauges
- Maintenance-free high-vacuum pump
- Dual-thoriated ion source and gauge filaments
Specifications
| Technical specifications | 990 dCLD |
|---|---|
| Min. detectable leak |
2 x 10-10 atm cc/sec(turbo)
2 x 10-9 atm cc/sec(MacroTorr) |
| Response time |
37 pin D-Type female parallel I/O
25 pin D-Type female BCD and 0-10 V analog (log or linear) leak rate output |
| I/O function examples | Start, stop, reject set points, status OK, Fault, AutoCat, Zero, Range RS232 also contains status and value of all internal controller parameters |
| Front panel connector | 9 pin D-type RS 232 |
| Front panel indicators | Status indicators for main On/Off, high vacuum, and spectrometer tube status |
| Spectrometer head | High sensitivity 90 degree deflection, dual-thoriated filament header-mounted ion source, maintenance-free high-vacuum pump, ionization and TC gauges |
| Weight (lbs) |
Control unit: 24
Spectrometer unit: 15 |
| Input power |
90-130 VAC or 180-240 VAC,
200 W max., 100 W typical |
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