Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 29)

Teledyne Analytical Instruments
Thermal Conductivity Analyzer Installation 3
3-11
Figure 3-6: Remote Probe Connector Pinouts
The voltage from these 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 match-
ing 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 could limit the obtainable
voltage, depending on the load impedance applied. See Figure 3-7.
Figure 3-7: FET Series Resistance
3.4 Gas Connections
The gas fittings are accessed through holes on the underside of the
analyzer chassis, as shown in Figure 3-8. Use 1 /
8
NPT threaded conversion
fittings to convert pipe to tube for these connectors.