Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D
Table 4-2: Front Panel Status LED's
LED State Meaning
Green Off
On
Blinking
NOT monitoring, DAS disabled or inactive
Monitoring normally, taking DAS data
Monitoring, DAS in HOLDOFF mode (1)
Yellow Off
On
Blinking
Autocal disabled
Autocal enabled
Calibrating
Red Off
Blinking
No warnings exist
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.
4-7