Teledyne 2000RS Operating Instructions Manual page 36

Thermal conductivity analyzer

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TCD Analyzer

span is complete, the calibration will repeat and the Cal Relay Contact

(CRC) will close again.

For example:

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 one, 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 2000RS automatically regulates the zero,

span and sample gas flow.

Range ID Relays: 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. The fourth range is reserved for

the Air Cal Range (25%). Table 3-4 lists the pin connections.

Table 3-4: Range ID Relay Connections

Range 1 ID Contact

Range 2 ID Contact

Range 3 ID Contact

Range 4 ID Contact (Air Cal)

Teledyne Analytical Instruments

Installation

Function

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