Trace Oxygen Analyzer
Installation
Teledyne Analytical Instruments
23
1.
Test the CRC. When the CRC is open, send a zero command
until the CRC closes (The CRC will quickly close.)
2.
When the CRC closes, remove the zero command.
3.
When CRC opens again, send a span command until the
CRC closes. (The CRC will quickly close.)
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 Valve connections (described below) 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 3000ZA2G automatically regulates the zero,
span and sample gas flow.
Range ID Relays:
There are four dedicated Range ID relay contacts. 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. Table 3-4 lists the pin connections.
Table 3-4: Range ID Relay Connections
Pin
Function
21
Range 1 ID Contact
38
Range 1 ID Contact
22
Range 2 ID Contact
39
Range 2 ID Contact
19
Range 3 ID Contact
18
Range 3 ID Contact
34
Spare Contact
35
Spare Contact
Network I/O:
Pins 13 (+) and 29 (–) are for serial digital input/output
for local network protocol. At this printing, this port is not yet
functional. It is to be used for future options to the instrument.
Remote Valve Connections:
The 3000ZA2G is a single-chassis
instrument, which has no Remote Valve Unit. Instead, the Remote Valve
