Teledyne 3010TAC Operating Instructions Manual page 29

Oxygen Analyzer
Cal Contact: This relay contact is closed while analyzer is spanning
and/or zeroing. (See Remote Calibration Protocol below.)
Remote Calibration Protocol: To properly time the Digital Remote
Cal Inputs to the Model 3010TAC 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
2) When the CRC closes, remove the zero command.
3) When CRC opens again, send a span command until the CRC
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
synchronous signal must open and close external span valve
appropriately. See Figure 3-5 Remote Probe Connector.
(The –C option internal valves operate automatically.)
Table 3-3: Remote Calibration Connections
Pin
9
11
10
12
40
41
until the CRC closes (The CRC will quickly close.)
closes. (The CRC will quickly close.)
Teledyne Analytical Instruments
Part I: Control Unit
Function
+ Remote Zero
– Remote Zero
+ Remote Span
– Remote Span
Cal Contact
Cal Contact
Part I: 3-7