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Teledyne 3000ZA-3X - Trace oxygen analyzer User Manual

Page 37

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Trace Oxygen Analyzer

Installation

Teledyne

Analytical

Instruments

25

Table 3-5: Commands via RS-232 Input

Command Description

as

Immediately starts an autospan.

az

Immediately starts an autozero.

st

Toggling input. Stops/Starts any
status message output from the
RS-232, until st is sent
again.


The RS-232 protocol allows some flexibility in its implementation.

Table 3-6 lists certain RS-232 values that are required by the 3000ZA
implementation.

Table 3-6: Required RS-232 Options

Parameter Setting

Baud 2400

Byte 8

bits

Parity none

Stop

Bits 1

Message Interval

2 seconds. When CRC opens
again, zero and span are done,
and the sample is being analyzed.

Range ID Relays: There are three dedicated Range ID relay contacts.
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.

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
options to 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. It requires a standard 9-pin D
connector.