Teledyne 9110T - Nitrogen Oxides Analyzer - Manual (Page 55)

Model 9110TH NOx Analyzer Getting Started
Teledyne Analytical Instruments 55
Note TAI recommends setting up the first link, between the Host and the first analyzer,
and testing it before setting up the rest of the chain.
RS-485 CONNECTION
As delivered from the factory, COM2 is configured for RS-232 communications. This port can be
reconfigured for operation as a non-isolated, half-duplex RS-485 port. Using COM2 for RS-485
communication will disable the USB port. To reconfigure this port for RS-485 communication, please
contact the factory.
3.3.2. PNEUMATIC CONNECTIONS
This section provides not only pneumatic connection information, but also important information about
the gases required for accurate calibration (Section 3.3.2.1); it also illustrates the pneumatic layouts for
the analyzer in its basic configuration and with options.
Before making the pneumatic connections, carefully note the following cautionary and additional
messages:
CAUTION
G
ENERAL
S
AFETY
H
AZARD
Do not vent calibration gas or sample gas into enclosed areas.
CAUTION – GENERAL SAFETY HAZARD
In units with a permeation tube option installed, vacuum pump must be
connected and powered on to maintain constant gas flow though the
analyzer at all times. Insufficient gas flow allows gas to build up to levels
that will contaminate the instrument or present a safety hazard to
personnel.
Remove permeation tube when taking analyzer out of operation, and store
in sealed container (use original container that tube was shipped in).
(See Figure 3-6 for location and Section 11.3.6 for instructions on how to
remove the perm tube when the unit is not in operation).
I
MPORTANT I MPACT ON R EADINGS OR D ATA
Sample and calibration gases should only come into contact with PTFE
tubing.