Teledyne 3000TA-XL-EU, Trace Oxygen Analyzer operating instructions Remote Calibration Connections

Trace Oxygen Analyzer Installation 3

Span:	Floating input. 5 to 24 V input across the + and – pins puts
	the analyzer into the Span mode. Either side may be
	grounded at the source of the signal. 0 to 1 volt across the
	terminals allows Span mode to terminate when done. A
	synchronous signal must open and close external span valve
	appropriately. See Figure 3-5 Remote Probe Connector. (The
	–C option internal valves operate automatically.)

Cal Contact: This relay contact is closed while analyzer is spanning and/or zeroing. (See Remote Calibration Protocol below.)

Table 3-3: Remote Calibration Connections

Pin Function

9+ Remote Zero

11– Remote Zero

10+ Remote Span

12– Remote Span

40Cal Contact

41Cal Contact

Remote Calibration Protocol: To properly time the Digital Remote Cal Inputs to the Model 3000TA-XL-EU Analyzer, the customer's controller must monitor the Cal Relay Contact.

When the contact is OPEN, the analyzer is analyzing, the Remote Cal Inputs are being polled, and a zero or span command can be sent.

When the contact is CLOSED, the analyzer is already calibrating. It will ignore your request to calibrate, and it will not remember that request.

Once a zero or span command is sent, and acknowledged (contact closes), release it. If the command is continued until after the zero or 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 done, and the sample is being analyzed.

Teledyne Analytical Instruments 3-7