Installation
Before tubing is connected to the system, it must be decontaminated to rid it of hydrocarbon deposits. Using a small torch, heat each length of tubing, while passing nitrogen through it, until it glows red. Begin at the nitrogen source end and proceed down the length of the tube, “chasing” the red glow (and hydrocarbon deposits) down to the open end of the tube. Cap tubing while not in use with suitable non- contaminating caps.
All sample, calibration, and supporting gas lines, which deliver gas to the analyzer, must be decontaminated before connection; vent lines do not.
When connecting the various gas lines to the system, be absolutely certain that no “dead ends” are left; that is, no unused branch lines should be left capped off, where pockets might form of material that is not representative of the current contents of the line, or which might keep contaminants from being purged out of the system.
CAUTION: THE GASES USED MUST BE OF THE
HIGHEST QUALITY, ULTRA ZERO GRADES, AS SHOWN BELOW. FAILURE TO DO SO WILL RESULT IN CONTAMINATION AND FAILURE TO DETECT LOW CONCENTRATIONS OF HYDROCARBONS.-
AIR: USE ULTRA ZERO GRADE, WATER PUMPED, AIR WITH THC LESS THAN 0.1 PPM.
FUEL: USE ULTRA HIGH PURITY (UHP) GRADE HYDROGEN GAS, 100%, WITH THC LESS THAN 0.5 PPM.
CARRIER GAS: USE ULTRA HIGH PURITY GRADE NITROGEN GAS, WITH THC LESS THAN 0.1 PPM.
3.3.3 Electrical Connections
Figure 3-1 shows the Series 4030 rear panel. There are connections for power, digital communications, and both digital and analog concentration output.
For safe connections, no uninsulated wiring should be able to come in contact with fingers, tools or clothing during normal operation.
CAUTION: USE SHIELDED CABLES. ALSO, USE PLUGS THAT PROVIDE EXCELLENT EMI/RFI PROTECTION. THE PLUG CASE MUST BE CONNECTED TO THE CABLE SHIELD, AND IT MUST BE TIGHTLY FASTENED TO
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