3 Installation Model Ultra Trace 3000
3-8 Teledyne Analytical Instruments
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.
Note: The Remote Valve connections (described below) provides
signals to ensure that the zero and span gas valves will be
controlled synchronously.
Range ID Relays: Four dedicated Range ID relay contacts. The first
three ranges are assigned to relays in ascending order—Low range is as-
signed 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
Pin Function
21 Range 1 ID Contact
38 Range 1 ID Contact
22 Range 2 ID Contact
39 Range 2 ID Contact
19 Range 3 ID Contact
18 Range 3 ID Contact
34 Range 4 ID Contact (Air Cal)
35 Range 4 ID Contact (Air Cal)
Network I/O: A 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. Pins 13 (+) and 29 (–).
Remote Valve Connections: The Ultra Trace 3000 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.