Teledyne 501 TRS, Operation Manual, Page: 40 / 111

T102 OPERATING INSTRUCTIONS Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual
38
As the instrument switches between TRS mode to SO
2
mode , only the reporting range
and analog output associated with the gas currently being measured will be active. The
reporting range and analog output for the gas not being measured will continue to
report the last valid reading.
The output, labeled A3 is special. It can be set by the user (see Test Channel Output
section in the T101 Manual - PN 07266) to output many of the parameters accessible
through the
<TST TST> buttons of the units Sample Display.
Output A4 is not available on the Model T102 Analyzer.
6.1.2.
Setting the T102 Gas Measurement Mode
Setting the gas measurement mode on the T102 is identical to the method described in
the
Setting the Gas Measurement section in the T101 Manual - PN 07266 except that the
available measurement modes are as described in the following table:
Table 6-1. T102 Gas Measurement Modes
GASMODE DESCRIPTION
TRS
The sample gas stream is stripped of any ambient SO
2
by a special
chemical scrubber, then passed through a catalytic converter that
changes the TRS present into SO
2
which is then measured using the
UV Fluorescence method
SO
2
The sample gas stream bypasses the SO
2
Scrubber and catalytic
converter allowing the only ambient SO
2
to be measured.
TRS –SO
2
The switching valve alternates the gas stream between the two paths
at regular intervals allowing the instrument to measure both gases.
6.2.
SETUP – DIAG: Using the Diagnostics Functions
6.2.1.
T102 Analog I/O Configuration
The following table supersedes the Analog Output Pin Assignments table in the Analog
I/O Configuration section of the T101 Manual - PN 07266
Table 6-2. Analog Output Pin Assignments
PIN ANALOG
OUTPUT
VOLTAGE
SIGNAL
CURRENT
SIGNAL
1
A1
V Out I Out +
2 Ground I Out -
3
A2
V Out I Out +
4 Ground I Out -
5
A3
V Out not available
6 Ground not available
7-8
A3
Not Used Not Used
See Figure 3-4 for the location of the analog output connector on the instrument’s rear
panel.
07267B DCN6485