Operational Theory | Series 4060 |
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2.4.2 Anode Power Supply
The high voltage anode power supply components are mounted on the anode power supply printed circuit board. High voltage regulation is achieved through the use of series-connected zener diodes. The simplicity of this circuit’s design can be attributed to the extremely low current demand of the anode circuit. The positive output voltage is nominally 125 volts. Output tolerance is ±10 volts from the specified 125 volts.
2.4.3 Flame Guard Circuit
A thermistor-controlled, transistorized switching circuit is employed to operate a relay in the event of a flame-out condition. A panel indicator light and fuel shut-off solenoid valve are operated by the relay to alarm personnel that a flame-out condition has occurred. The fuel shut-off solenoid valve stops the hydrogen flow.
2.4.4 Flame Ignition Circuit
The flame ignition circuit includes the anode-igniter electrode (in the detector cell), a transformer, and processor controlled relay. The circuit is automatically energized when the FID cools due to lack of flame.
If automatic ignition fails five times, there will be a message that reports this, and the flame can be manually ignited by pressing simultaneously the Up and Down key.
26 | Teledyne Analytical Instruments |
