Daytronic 10A72-2C Bedienungsanleitung
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10A72-2C
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1 GENERAL DESCRIPTION AND SPECIFICATIONS
The Model 10A72-2C is a general-purpose two-channel conditioner for use with DC-
excited load cells, pressure sensors, and any other conventional strain gage
transducer
employing a 4-arm bridge of nominal 350 Ω or higher, with a full-scale
range of 0.75, 1.50, or 3.00 mV/V.
The 10A72-2C’s advanced design techniques overcome errors that traditionally
plague the strain-gage conditioning process. Separate excitation for each channel
uses remote sensing of bridge voltage and is slaved to a common System Reference
Voltage. The result is consistently stable ratiometric measurement, unaffected by
possible power-supply drift. Input impedances in excess of 10,000 MΩ are presented
to signal leads to eliminate cable resistance as a source of error. Allowable cable
length has virtually no practical limits.
The 10A72-2C features selectable per-channel excitation (1, 5, or 10 V-DC). Using low
excitation helps reduce gage heating effects in
stress analysis of materials with low
thermal conductivity. Table 1 gives the full-scale mV/V ranges that correspond to
each excitation level.
In addition, the 10A72-2C lets the user select either 10-Hz or 100-Hz analog filtering for
each input channel. The wideband (100-Hz) filter is specially designed for measure-
ment of a highly dynamic input signal.
A convenient shunt calibration technique is provided. Each channel’s shunt resistor
may be switched in and out by software command or by means of logic-level inputs
through the rear I/O CONNECTOR.
When connected to an optional
Model 10CJB-2 Dual Bridge Completion Card (or
equivalent circuitry supplied by the user*), the 10A72-2C can accept input from a two-
wire 1/4-bridge, three-wire 1/4-bridge, 1/2-bridge, or full-bridge strain gage configura-
tion. See Section 4 for details.
ADDITIONAL 10A72-2C SPECIFICATIONS
Transducer Types
: Conventional 4-arm strain gage bridges, nominal 350 ohms (or
higher); 1/4- and 1/2-bridge gage configurations can be accommodated by means
of the
Model 10CJB-2 Dual Bridge Completion Card described in Section 4 (or
equivalent external bridge-completion circuitry supplied by the user)*
(cont’d)
* When conditioning input from a 1/4-bridge or 1/2-bridge strain gage configuration, a 10A72-2C
channel should be set to “Gage” mode (see Section 3.a). If you wish to provide your own
bridge-completion circuitry, you should contact the factory for instructions on connections and
calibration.
MODEL 10A72-2C
ENHANCED DUAL STRAIN GAGE
CONDITIONER CARD
GENERAL DESCRIPTION AND SPECIFICATIONS 10A72-2C.1
1.E.2.10A72-2C
SYSTEM 10
ANALOG INPUT CARDS
Produktspezifikationen
| Marke: | Daytronic |
| Kategorie: | Nicht kategorisiert |
| Modell: | 10A72-2C |
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