Teledyne 4040 - Methane / Nonmethane analyzer - Manual (Page 28)

Installation Series 4040
28 Teledyne Analytical Instruments
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 PPB BENZENE:
AIR: USE WATER PUMPED AIR WITH THC LESS
THAN 0.1 PPM. DO NOT USE OIL PUMPED
AIR UNDER ANY CIRCUMSTANCES.
FUEL: HYDROGEN GAS, 100%, ZERO QUALITY
WITH THC LESS THAN 0.5 PPM.
CARRIER GAS: NITROGEN GAS, ULTRA ZERO
GRADE WITH THC LESS THAN 0.05 PPM.
3.3.3 Electrical Connections
Figure 3-1 shows the Series 4040 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
THE ANALYZER WITH ITS FASTENING SCREWS.
ULTIMATELY, IT IS THE INSTALLER WHO ENSURES
THAT THE CONNECTIONS PROVIDE ADEQUATE
EMI/RFI SIELDING.