Agilent Technologies Helium Leak Detector
DRAFT 12/11/17
51
25 Pin I/O ❑ Inputs: Opto-isolated, 5 - 24 VDC 3300 Ohm resistive load.
All inputs are opto-isolator LEDs with series resistors.
❑ Momentary Inputs: Opto-isolated, 5 - 24 VDC 3300 Ohm
resistive load, requires 200 ms minimum pulse width.
❑ Outputs: Emitter follower with 10 Ohm series resistor, 14
mA max drive current, 24 VDC max.
For pin identifications, see Table A-6 on page 152.
Exhaust cover
USB Connector A standard or high speed USB port for software updates.
1.8 Features
The features for the leak detector are provided in Table 1-4.
Table 1-4 Features
Feature Description
Calibration Fully automated tuning and calibration using the internal or external
calibrated leak. The fast calibrate feature allows calibration in less
than one minute.
Zero Control Selectable mode background elimination with a unique, patented
Autozero<0 feature.
Leak Indication A bar graph (linear or log) indicator displays leak rates automatically;
alphanumeric indication on Touch Panel display. A leak can also
trigger an audible alarm frequency that varies in proportion to the size
of the leak, dedicated volume control and programmable audio
threshold. Analog voltage is proportional to the leak rate.
Pressure Indication Test port and spectrometer pressure with alphanumeric indication on
the Touch Panel display.
Spectrometer Sensitivity optimized design, header mounted ion source with dual
thoria-coated iridium filament, a high sensitivity, wide dynamic range
preamplifier, and vacuum gauge.
Automatic Valve Sequencing Microprocessor-controlled valve operation provides automatic system
cycling.
Safety Interlocks A valve system design that completely protects the high vacuum
system under test against pressure surge and power interruption.
Optional
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