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The AT Tree Switch Terminals also connect to the H, L, and G connections
on the Analog Bus Connector. The BT Tree Switch Terminals also connect
to the I+, I-, and IG connections on the Analog Bus Connector. The Analog
Bus Connector provides direct channel connections between multiple
multiplexer modules, and connections between a multiplexer module and
the HP E1326/E1411 Multimeters. Cables make the necessary connections
without the need to externally wire the multimeter/multiplexer modules via
the terminal modules.
The 16-Channel Thermocouple Relay Multiplexer Modules (HP E1344A
and E1347A) uses the RT Tree Switch (Channel 93) to connect the
thermistor on the terminal module to the Bank 1 channel common. The
thermistor can be measured to determine the temperature inside of the
terminal module to compensate for temperature measurements made with
thermocouples (see Chapter 3).
Each channel High (H) line has a jumper on the terminal module that may
be removed to add filter components (see Chapter 2 under the "Adding
Signal Conditioning Components/Current Shunts" heading). Each Bank 0
and Bank 1 common line, the AT and BT Tree Switch, and the Analog Bus
lines all have 100 ohm resistors in series with each line. The resistors
provide relay protection and are located on the component module.
12 Getting Started
Chapter 1
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