Teledyne 100AH Power Supply Module, Pneumatic System, Front Panel Status LEDs, Power Switch

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

Table 4-2: Front Panel Status LED's

LED	State	Meaning
Green	Off	NOT monitoring, DAS disabled or inactive
	On	Monitoring normally, taking DAS data
	Blinking	Monitoring, DAS in HOLDOFF mode (1)
Yellow	Off	Autocal disabled
	On	Autocal enabled
	Blinking	Calibrating
Red	Off	No warnings exist
	Blinking	Warnings exist

(1) This occurs and means during Calibration, DAS holdoff, Power-up Holdoff, and when in Diagnostic mode.

4.2.5.3 Power Switch

The power switch has two functions. The rocker switch controls overall power to the instrument; in addition it includes a circuit breaker. If attempts to power up the M100AH result in a circuit breaker trip, the switch automatically returns to the off position, and the instrument will not power up. If this occurs, consult troubleshooting section or factory.

4.2.6 Power Supply Module

The Power supply module (PSM) supplies AC and DC power to the rest of the instrument. It consists of a 4 output linear DC power supply and a 15 volt switching supply. In addition, it contains the switching circuitry to drive the DC operated valves and several switched AC loads to operate the reaction cell and UV lamp.

4.2.7 Pneumatic System

In the basic analyzer, the sample enters through a 5-micron TFE filter element. The sample then enters the flow control module and the reaction cell. The external pump pack is supplied as standard equipment with the M100AH.

When the zero/span valve option is included, the sample passes through the valve manifold and then enters the reaction cell. (See Section 6.)

Sample flow is controlled by a critical flow orifice. The orifice is protected by a 20-micron filter. The orifice never needs adjustment. The critical flow orifice maintains precise volumetric flow control as long as the down stream pressure of the orifice is maintained under critical pressure. For example, at or near 14" (350 mm) Hg absolute at sea level.

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