3-12 | Model 931S / Model 932S UV Analyzers
Installing the Zero/Aspirator Drive Gas Line
The Zero/Aspirator gas line is supplied by the customer. The tubing must
be 1/4" 316 stainless steel tubing with appropriate 1/4" NPT connectors.
Refer to Final “As-Built” drawings for Zero/Aspirator Drive Gas pressure
settings for your application.
The recommended Zero gas is UHP Nitrogen or Instrument Air for non-
flammable streams.
If using Instrument Air, it must meet the ANSI/ISA S7.0.01 (1996)
specifications at all times. If it cannot meet these requirements, an
inlet filter system must be installed.
To install the Zero/Aspirator gas line:
1. Route the line from the supply source to the analyzer.
2. Purge the line to remove any liquids or particulate in it before con-
necting it to the analyzer.
3. Connect the line to the Zero/Aspirator Drive Gas Inlet on the analyzer.
4. Connect the Zero gas air line to the Zero gas cylinder or the
Instrument Air line to the Instrument Air supply.
NOTE
Summary of Contents for 931S
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Page 237: ...Maintenance and Troubleshooting 6 53 Figure 6 14 AC Distribution board P N 100 1771...
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Page 239: ...Maintenance and Troubleshooting 6 55 Figure 6 16 Microcontroller board P N 100 1781 SW400...
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Page 263: ...Appendix A Drawings A 7 RS 232 Cable Communications Connections 300 9480...
Page 264: ...A 8 Model 931S Model 932S UV Analyzers Optical Bench Board 100 1662...
Page 265: ...Appendix A Drawings A 9 PMT Buffer Board 100 0140...
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