Teledyne 2120XL - Trace Nitrogen Analyzer - Manual (Page 39)

Trace Nitrogen in Argon Analyzer Installation
Teledyne Analytical Instruments 27
az Immediately starts an autozero.
st Toggling input. Stops/Starts any
status message output from the
RS-232, until st is sent
again.
The RS-232 protocol allows some flexibility in its implementation.
Table 3-6 lists certain RS-232 values that are required by the Model
2120XL implementation.
Table 3-6: Required RS-232 Options
Parameter Setting
Baud 9600
Byte 8 bits
Parity none
Stop Bits 1
Message Interval 2 seconds. When CRC opens
again, zero and span are done,
and the sample is being analyzed.
3.6 Gas Connections
CAUTION: THIS INSTRUMENT IS NOT DESIGNED TO HANDLE
HAZARDOUS GASES.
OZONE EMISSIONS CAN OCCUR IF AIR OR
MOISTURE ARE IONIZED IN THE SAMPLING
SYSTEM. THE SAMPLE PATH MUST BE
RELATIVELY FREE OF AIR AND/OR MOISTURE
BEFORE APPLYING THE IONIZING VOLTAGE.
KEEP THE MODEL 2120XL POWER OFF AND PURGE
THE EXTERNAL TUBING. THEN APPLY POWER TO
PURGE THE INTERNAL LINES. ANALYZER POWER
IS NEEDED TO PURGE ANALYZER SINCE THE
FLOW CONTROL MODULE NEEDS POWER TO
OPERATE. MAKE SURE THAT THE VENT IS AT
ATMOSPHERIC PRESSURE.