Specifications

Bridge Completion
Channels
The strain gages mounted to the specimen are connected to the terminal
module bridge completion channels via the +E, -E1, -E2, H, L, and G
terminals. Each channel contains these six terminals in order to
accommodate a
1
⁄
4
,
1
⁄
2
, or full bridge arrangement. A wire is connected to a
terminal by:
1. loosening the screw on the terminal,
2. inserting the wire into the opening opposite the screw,
3. tightening the screw to secure the wire in place.
Routing the wires under the strain relief clamp will prevent the wires from
being pulled out of the terminal.
Bridge Wiring
Diagrams
The
1
⁄
4
,
1
⁄
2
, and full bridge wiring diagrams on the terminal module cover
(Figure 2-1B) indicate the connections between the strain gage bridge
arrangement and the channel terminals. The six points on the diagrams: +E,
-E1, -E2, H, L, and G correspond to the six wiring terminals on each bridge
completion channel. These points also correspond to the points shown on
the Wheatstone Bridge on page 54. The terminals used by the bridge
configurations are:
•
1
⁄
4
bridge - +E -E1 H G
•
1
⁄
2
bridge - +E -E2 H G
• full bridge- +E -E2 H L G
An example of how the diagram relates to gage wiring is shown for the
1
⁄
4
bridge arrangement in Figure 2-2.
H L G Voltmeter
Terminals
The common high (H), low (L), and guard (G) terminals are the same point
electrically as the H, L, and G terminals of the bridge completion channels.
These common terminals allow for strain measurements using an external
voltmeter (see “Measurements Using an External Voltmeter” on page 63).
Figure 2-2. 1/4 Bridge Arrangement Wiring Diagram
Chapter 2 Connecting Strain Gages to the Multiplexers 25
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com