Teledyne 3010TB Operating Instructions Manual page 25

Oxygen Analyzer
4) When the CRC closes, remove the span command.
When CRC opens again, zero and span are done, and the sample is
being analyzed.
Note: The Remote Probe connector (paragraph 3.3) 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
3010TB automatically regulates the zero, span and sample gas
flow.
Range ID Relays: Four dedicated RANGE ID CONTACT relays .
The first three ranges are assigned to relays in ascending order—Low range
is assigned 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%).
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 instrument.
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 Purpose
DCD
RD
TD
DTR
COM
DSR
RTS
CTS
RI
Teledyne Analytical Instruments
Part I: Control Unit
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
Part I: 3-9