Teledyne 2010A - Split architecture thermal conductivity analyzer - Manual (Page 30)

Teledyne Analytical Instruments
3 Installation Model 2010A
3- Part I
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.
When the contact is closed, the display would display the last reading
of the gas concentration value and output signal would output the last read-
ing from the sample gas (SAMPLE and HOLD).
For example:
1) Test the CRC. When the CRC is open, Send a zero command
until the CRC closes (The CRC will close quickly.)
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 close quickly.)
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 Probe connector (paragraph 3.3.9) provides sig-
nals to operate the zero and span gas valves synchronously.
However, if you have the –C, -P, or -Q Internal valve option,
which includes zero and span gas inputs, the 2010A automati-
cally selects the zero, span and sample gas flow.
3.3.6 Range ID Relays
Four dedicated Range ID relay contacts. For any single application
they are assigned to relays in ascending order. For example: if all ranges
have the same application, then the lowest range is assigned to the Range 1
ID relay, and the highest range is assigned to the Range 3 ID relay. Range 4
is the Cal Range ID relay.
3.3.7 Network I/o
A serial digital input/output for local network protocol. At this print-
ing, this port is not yet functional. It is to be used in future versions of the
instrument.