Daytronic 10A73-4 Bedienungsanleitung
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10A73-4
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1 GENERAL DESCRIPTION AND SPECIFICATIONS
Intended primarily for stress analysis applications, the Model 10A73-4 receives and
conditions up to
four independent inputs from one-arm (1/4-bridge), two-arm (1/2-
bridge), and four-arm (full-bridge)
strain gage configurations attached directly to the
stressed material.
If you are measuring strain by means of a one-arm (1/4-bridge) strain gage configura-
tion, BE SURE TO STUDY SECTION 4 FOR A DISCUSSION OF “LEAD WIRE AND NON-
LINEARITY EFFECTS WITH QUARTER-BRIDGE STRAIN GAGE CONFIGURATION.”
Unless all four inputs originate from full-bridge transducers, the 10A73-4 requires
external completion of each strain gage input to
full bridge, by means of one of the fol-
lowing:
• aSystem 10 Bridge Completion Connector—one of the following models:
—
10QBC-4-120 for 2- or 3-wire 120-Ω quarter-bridge connections
—
10QBC-4-350 for 2- or 3-wire 350-Ω quarter-bridge connections
—
10QBC-4-1K for 2- or 3-wire1000-Ω quarter-bridge connections
—
10HBC-4 for 4- or 6-wire half-bridge connections
—
10FBC-4 for 5-wire full-bridge connections
• a Daytronic Model 10CJB-4 Quad Bridge Completion Card (described in Sec-
tion 2.b)
1
;
• equivalent circuitry supplied by the user
2
When the 10A73-4 is used with one of the System 10 Bridge Completion Connectors
listed above, the excitation level is
fixed at 5 V-DC. In the absence of a Bridge Com-
pletion Connector—whether or not the
Model 10CJB-4 is used—the 10A73-4 provides
selectable low-level excitation (1, 2, or 5 V-DC) to help reduce gage heating effects in
materials with low thermal conductivity.
3
However, the selection of excitation level for
the 10A73-4 is not “per channel”;
the same level applies to all four 10A73-4 channels.
See Section 3.a for details.
As explained in Section 3.b, the 10A73-4 can be quickly calibrated either through
“calculated” calibration—involving application of the
MVV command—or through a
convenient shunt technique. Unless a System 10 Bridge Completion Connector is
being used with the 10A73-4, all four shunt resistors may be switched in and out
simultaneously by means of logic-level inputs through the rear I/O CONNECTOR.
1
The 10CJB-4 contains a switch for easy selection of the common excitation level.
2
If you wish to provide your own bridge-completion circuitry, you should contact the factory for
instructions on connections and calibration.
3
A special modification must be made to the 10A73-4 card to allow selectable excitation when a
System 10 Bridge Completion Connector is attached.
MODEL 10A73-4
1/2 & 1/4 BRIDGE STRAIN GAGE
CONDITIONER CARD
GENERAL DESCRIPTION AND SPECIFICATIONS 10A73-4.1
1.E.2.10A73-4
SYSTEM 10
ANALOG INPUT CARDS
Produktspezifikationen
| Marke: | Daytronic |
| Kategorie: | Nicht kategorisiert |
| Modell: | 10A73-4 |
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