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Technical Information
Reference Figure 22:
1
Serial Connector
2
25 Pin I/O
3
Power Entry Module
4
Vacuum Pump Breaker A 6 A Thermal Circuit Breaker for the internal
5
Analog Output
6
Chassis (Earth)
Terminal
7
Exhaust
8
USB Port
9
Nitrogen Vent Port
A detailed summary of information related to I/O pin identifications is provided in Table 28.
60
A 9-pin male D-type connector to interface with an
external PC via RS-232 type communications protocol
for system diagnostic or control. A detailed summary
of information related to serial communication is
provided in Section A "Communications Protocol".
•
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.
Provides supply power, overcurrent and EMI
protection for the leak detector. The Power Entry
Module consists of:
Power Input Connector - An IEC/EN60320/C20
standard, three-prong grounded inlet connector.
Power Switch (I/O) - A 20A rocker type Power
Switch/Thermal Circuit Breaker.
20 A EMC line filter.
mechanical pump.
Banana type output connector for an Isolated Leak
Rate Analog reading. The Red connector is a signal
positive terminal; black is the signal negative terminal.
Signal range: From 0 to +10 VDC. Later models of the
Agilent Technologies Helium Mass Spectrometer
leak detector will be equipped with a DB9F connector
for the analog output. Pin #1 is signal (positive) and
Pin #2 is return (negative).
Provided for additional connection of the leak
detector to the building grounding system to improve
ESD protection.
A barbed hose fitting (OD = 12.57 mm) for exhaust of
the internal mechanical vacuum pump.
A standard high speed USB port for software updates.
Agilent Helium Leak Detector User Manual
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