Model AA30
Enhanced LVDT Conditioner
Enhanced LVDT Conditioner
| Input Type | Description | SPS6000 | SPS8000 | System 10 |
| Distance, Displacement, Angle |
LVDT Conditioner |
X X |
XX |
XX |
This 2-or 4-channel conditioner is for measurement of displacement, force, pressure, and other parameters obtained with a linear variable differential transformer (LVDT) or variable reluctance transducer. Similar in function to the Model 10A30-2C, the AA30 features enhanced linearity correction,
and thus accommodates a wider range of transducers (see Specifications). Special cabling is not required- as it is with the 10A30-2C- for "long-stroke" LVDT’s (full-scale range of ±1 inch or greater). See also the standard "AA"-card features, including programmable low-pass active filtering.A "Slave Excitation" input is available if the user wishes to provide an external excitation voltage and frequency instead of the AA30’s internal supply.* Calibration provisions for the AA30 are identical to those of the 10A30-2C.
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* The external excitation input must be 2 to 3.5 V-AC (rms) and 2 to 6 kHz, referenced to "center wire" (Signal Common). To prevent harmonic beating, it is strongly recommended that the excitation of all AA30 channels in a given system be either sourced to the internal supply or slaved to the same external sine-wave signal source.
- Number of Input Channels: Two or four (specify AA30-2 or AA30-4, respectively)
- Transducer Types: 5- or 7-wire LVDT’s capable of 3280-Hz operation and having primary impedance of 80 ohm or greater (all Daytronic
LVDT transducers are suitable); 3- or 5-wire variable reluctance transducers
- Input Ranges (rms, full-scale): Automatically selected- on an individual channel basis- when the channel is configured
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Standard: 70, 140, 280, or 410 mV/V
Long-Stroke: 820 mV/V or 1.64 V/V
- On-Board Excitation (per channel): Nominal 3 V-AC (rms) at 3280 Hz; 37.5 mA (rms), maximum, for each voltage, subject to 120 mA total current draw for all 4 channels
- Amplifier (per channel):
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Normal-Mode Range: ±6 V operating; ±12 V without instrument damage
Common-Mode Range: ±5 V operating; ±12 V without instrument damage
Common-Mode Rejection Ratio: DC: infinite; at 60 Hz: -120 dB; at 3 kHz: -60 dB
Input Impedance: Differential: 200 k-ohm; Common-Mode: 125 k-ohm
Offset: Initial: ±1% of full scale; vs. Temperature: ±20 ppm/°C; vs. Time: ±0.01% of full scale/month
Gain Accuracy: ±0.02% of full scale, following calibration
Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±20 ppm/month
- Filter (per channel): Programmable or fixed; see the tables on the standard "AA"-card features page
- Auxiliary Outputs: Nominal ±5 V-DC signals available on wire-wrap pins; individually jumper-selectable to represent either the filtered or pre-filtered reading of the channel**
- Power-Supply Slot Allotment: This card has the potential of consuming 165 mA of supply current from the Conditioner Card Slot
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**In the case of the Model AA30, an active 300-Hz filter is applied to each input channel as part of the standard signal demodulation process, prior to delivery of the signal either to an installed filter tile or to a wire-wrap pin. A "prefiltered" AA30 output will therefore have the following response characteristics:
- -3 dB at 300 Hz; -60 dB at 4.4 kHz
- Step-Response Settling Time (Full-Scale Output): To 1% of final value: 2 msec; to 0.1% of final value: 2.5 msec; to 0.02% of final value: 3 msec
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For complete Pricing and Ordering Information, write us or call Daytronic at 1-800-668-4745 |