Teledyne 3000ZA2G - Zirconium oxide analyzer User Manual

Page 35

Trace Oxygen Analyzer

Installation

Teledyne

Analytical

Instruments

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

Range 1 ID Contact

Range 2 ID Contact

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
connections are used as a method for directly controlling external
sample/zero/span gas valves. See Figure 3-5.