Teledyne 3000ZA-3X operating instructions Remote Probe Connections

Trace Oxygen Analyzer Installation

Network I/O: Pins 13 (+) and 29 (–) are for 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.

Remote Valve Connections: The 3000ZA 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.

Figure 3-5: Remote Probe Connections

The voltage from these outputs is nominally 0 V for the OFF and 15 VDC for the ON conditions. The maximum combined current that can be pulled from these output lines is 100 mA. (If two lines are ON at the same time, each must be limited to 50 mA, etc.) If more current and/or a different voltage is required, use a relay, power amplifier, or other matching circuitry to provide the actual driving current.

In addition, each individual line has a series FET with a nominal ON resistance of 5 ohms (9 ohms worst case). This can limit the obtainable voltage, depending on the load impedance applied. See Figure 3-6.

Teledyne Analytical Instruments 23