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Trace Oxygen Analyzer
Note: The remote probe connections (paragraph 3.3.9) provides
signals to ensure that the zero and span gas valves will be
controlled synchronously. If you have the –C Internal valve
option—which includes additional zero and span gas inputs—
the 3000TB automatically regulates the zero, span and sample
gas flow.
3.3.6 Range ID Relays
There are four dedicated RANGE ID CONTACT relays. The first
three ranges are assigned to relays in ascending order—Low range is as-
signed to RANGE 1 ID, Medium range is assigned to RANGE 2 ID, and
High range is assigned to RANGE 3 ID. RANGE 4 ID is reserved for the
Air Cal Range (25%).
3.3.7 Network I/O
A serial digital input/output for local network protocol. At this printing,
this port is not yet functional. It is to be used in future versions of the instru-
ment.
3.3.8 RS-232 Port
The digital signal output is a standard RS-232 serial communications
port used to connect the analyzer to a computer, terminal, or other digital
device. The pinouts are listed in Table 3-3.
The data sent is status information, in digital form, updated every two
seconds. Status is reported in the following order:
•
Table 3-3: RS-232 Signals
RS-232 Sig
RS-232 Pin
DCD
RD
TD
DTR
COM
DSR
RTS
CTS
RI
The concentration in ppm or percent
Teledyne Analytical Instruments
Purpose
1
Data Carrier Detect
2
Received Data
3
Transmitted Data
4
Data Terminal Ready
5
Common
6
Data Set Ready
7
Request to Send
8
Clear to Send
9
Ring Indicator
Installation 3
3-9
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