Daytronic IL78A Handleiding
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The Model IL78A is a single-channel conditioner ofphase-sensitive carrier-amplifierdesign.
Intended for applications involving transformer-coupling to the transducer bridge (as with rotary-
transformer torque sensors), this conditioner can also be used in conventional installations when
high sensitivity is required or where the electrical envi
ronment is especially noisy. Responding
only to the modulated carrier frequency, the IL78A rejects extraneous voltages that can cause
errors in DC systems, particularly when there is a need to “blow up” a portion of the transducer
range. User-adjustable phase and symmetry controls are provided.
1GENERALDESCRIPTIONANDSPECIFICATIONS
IN-LINE AC Strain Gage Conditioner
MODELIL78A
AC Strain Gage
C
ONDITIONERModule
IL78A
GENERAL DESCRIPTION ANDSPECIFICATIONSIL78A.1
Top View of the Model IL78A AC Strain Gage Module (cover removed)
AC Strain Gage Phase Operation
Due to theAC modulated aspects of theIL78A AC Voltage excitation circuit, the IL78A8 contains a "PHASE"
adjustment whi
ch aligns the transducer's return output signal to the conditioner's demodulator. When the
demodulator isaligned properly through calibration,maximum amplitude and linearityare achieved.
The Model IL78A's is calibrated by means of a “two-point (dead-weight)” orshunt-calibration
technique, which are outlined in section three. The user can utilizethe shunt calibration method
by adding the correct leaded shunt resistor value from "Cal Sense" to either + Senseor - Sense
depending on the polarity desired.
ShuntOperation:Located between the two screw terminal connectors, t
he IL70A contains a Shunt resistor jumper
selection. "EXT" is for an external - user installed shunt or
"INT" for the internal - built in - 59K Ohm shunt. Installing the jumper
enables the selected feature. For an external shunt resistor, install the leaded resistor between the "Cal Sense" (pin 7) terminal
and either the + Signal (pin 5) or the - Signal (pin 6) terminals. Use the SW4 "Shunt" button to engage the shunt resistor across
the selected side of the bridge or "SHP or "SHN" logic input lines. For transducers with an installed shunt resistor, place the
jumper on the "EXT" teminals and wire the "Cal Sense" line to the transducer's shunt connector pin.
92371.00 rev. B
Product specificaties
| Merk: | Daytronic |
| Categorie: | Niet gecategoriseerd |
| Model: | IL78A |
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