Teledyne 3010TB - Split architecture trace oxygen analyzer - Manual (Page 75)

Oxygen Analyzer Part II: Analysis Unit
Part II: 3-7 Teledyne Analytical Instruments
The voltage from the solenoid outputs is nominally 0 V for the OFF
and 15 V dc 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.
Note that 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, de-
pending on the load impedance applied. See Figure 3-6.
Figure 3-6: FET Series Resistance
3.5 Installing the Micro-Fuel Cell
The Micro-Fuel Cell is not installed in the cell block when the
instrument is shipped. It must be installed during initial installation.
Once it is expended, the Micro-Fuel Cell will need to be replaced. The
cell could also require replacement if the cell is exposed to air for too long,
or if the instrument has been idle for too long.
When the micro-Fuel Cell needs to be installed or replaced, follow the
procedures in chapter 5, Maintenance, for removing and installing cells.
3.6 Testing the System
After The Control Unit and the Analysis Unit are both installed and
interconnected, and the system gas and electrical connections are complete,
the system is ready to test. Before plugging either of the units into their
respective power sources: