Teledyne 200A Benutzerhandbuch

 

The Power supply module supplies AC and DC power to the rest of the instrument. It consists of 

a four 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 that operate 

the Rx cell, IZS, and molybdenum converter heaters and the ozone generator. The only voltages 

not generated in the PSM are the high voltage DC required by the PMT which is generated 

inside the sensor module and the high voltage AC used by the ozone generator.  

A standard M200A comes with two valves. The NO/NO

x

 valve switches sample gas into the 

reaction cell from either the sample inlet port or from the moly converter into the reaction cell. 

Periodically, the AutoZero valve shuts off sample flow to the reaction cell to measure the 

detector dark signal. 

A catalytic scrubber contained in the moly converter assembly removes the ozone present in the 

exhaust stream. 

If the external pump is selected, This option is not available with the internal pump. 

The external Pump Pack includes a vacuum pump and optional charcoal NO

2

 scrubber. By using 

this pump, it is possible to remove a significant source of acoustic noise and vibration from the 

immediate area of the analyzer. The pump pack is supplied with 0.25" tube fitting to connect to 

the exhaust fitting on the M200A rear panel. See Table 2-2-3 for hook-up information. Plugging 

the power cord into an AC outlet turns on the pump pack, see Table 4-4-3. 

The internal pump has slightly lower performance specifications, and shorter MTBF, however it 

consumes significantly less power, and makes an instrument that has a single chassis. The NO

2

 

scrubber option. 

A pump is supplied as standard equipment, however if another pump is used, it must have the 

following characteristics: 

1. 

The pump must supply 1 slpm at 5"Hg-A. 

2. 

The ozone scrubber must remove all ozone from the analyzer exhaust. 

3. 

Connect the exhaust (Table 2-2-3) to a pump with <3 m of 1/4" PTFE tubing. 

Failure to meet the performance specifications will result in poor analyzer performance, damage 

to the pump, damage to the analyzer, and may jeopardize warranty repairs. Teledyne API 

strongly recommends that the factory supplied pump be used with the M200A.