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6UP-450-004-004   

 
WARNING
Do not connect AC power leads without first ensuring that AC power source is switched 
OFF. Failure to follow this warning may result in injury or death to personnel or cause 
damage to the equipment. 
CAUTION
Do not apply electrical power to the GC until all interconnections and external signal 
connections have been verified, and proper grounds have been made. Failure to 
observe this precaution may cause damage to equipment.
AC wiring is usually colored as: 
2. Bring the power leads in through the left entry on the bottom of 
the enclosure.
3. If necessary, connect the GC chassis ground to an external copper 
ground rod (at remote locations). See Section 3.1.5 regarding 
electrical and signal grounding.
Attribute Wire Color
hot brown or black
neutral blue or white
ground green or green
System Reference Manual Model 700 Gas Chromatograph
3-9000-521 APRIL 2012
3 - 26
3.3.3 Sample and Gas Lines
To install GC sample and gas lines:
Note
Use SS tubing. Keep tubing clean and dry internally to avoid contamination. Before 
connecting the sample and gas lines, flow clean air or gas through them. Blow out 
internal moisture, dust, or other contaminants. 
1. Remove the plug from the Sample Vent (SV) line (1/16-inch 
tubing marked “SV” located on the Flow Panel Assembly).
? If desired, connect the SV line to an external (ambient 
pressure) vent. If the vent line is terminated in an area exposed 
to wind, protect the exposed vent with a metal shield.
? Use 1/4-inch or 3/8-inch tubing for vent lines longer than 10 
feet.
Figure 3-11. Model 700 Upper Enclosure
Note that, at this stage in the installation, the GC Measure Vent 
(MV) line (marked “MV”) remains plugged until leak checks are 
completed. For regular operation, however, the MV line must be 
unplugged, or open.
Do not discard the vent line plugs. They are useful at any time 
when leak-checking the GC and its sample or gas line 
connections.
MV
SV
 Sample Vent and
Measure Vent Lines
Model 700 Gas Chromatograph System Reference Manual
APRIL 2012 3-9000-521
3 - 27
2. Connect carrier gas to the GC. (The carrier gas inlet is a 1/8-inch 
tee fitting located on the left side of the upper enclosure.) 
CAUTION
Do not turn on gas until you have completed leak checking the carrier and sample lines 
(see Step 5). Failure to follow this precaution may cause injury to personnel or damage 
equipment. 
Figure 3-12. Carrier gas inlet left-side upper enclosure
? Use 1/8-inch or 1/4-inch stainless steel tubing to conduct 
carrier gas.
? Use a dual-stage regulator with high-side capacity of 3000 
psig and low-side capacity of 150 psig.
Carrier Gas
Inlet
System Reference Manual Model 700 Gas Chromatograph
3-9000-521 APRIL 2012
3 - 28
? See Appendix C for a description of a dual-cylinder carrier gas 
manifold (P/N 3-5000-050) with these features: