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Model 10A65-8
 Eight-Channel Low-Level Voltage Conditioner

Input Type Description SPS6000 SPS8000 System 10
Voltage, Current 8-Channel Low-Level Voltage X-X
 X-X
 X*X


This conditioner is designed for precise measurement of miscellaneous low-level external analog signals (allowable input ranges are ±50, ±100, and ±200 millivolts-DC). It is similar to the Model 10A60-4, but allows input of up to eight voltage signals (rather than four), and may only be used in System 10.

Although it has a lower common-mode operating range than the Model 10A60-4, it offers substantially higher internal accuracy (see Specifications). Unlike the 10A60-4, it has no auxiliary outputs from wire-wrap pins.

"Absolute" calibration may be used for a 10A65-8 channel if the parameter being measured is voltage itself. "Two-point" ("deadweight") calibration should be used if the voltage input signal is an analog of some other parameter that has at least two independently and accurately known calibration values.

Specifications:
  • Transducer Types: Low-level 2-wire DC voltage sources, grounded or floating, that provide their own power supply
  • Input Voltage Ranges: ±50, 100, or 200 mV-DC; automatically selected- on an individual channel basis- when the channel is configured
  • Amplifier (per channel):
      Normal-Mode Range: ±0.2 V operating; ±10 V without instrument damage
      Common-Mode Range: ±20 V operating; ±50 V without instrument damage
      Common-Mode Rejection Ratio: DC: -97 dB; at 60 Hz, 1 kHz, and 3 kHz: infinite
      Input Impedance: Differential: 2 M-ohm; Common-Mode: 0.5 M-ohm
      Offset: Initial: ±0.04 mV; vs. Temperature: ±10 mV/°C; vs. Time: ±20 mV/month
      Gain Accuracy: ±0.02% of full scale typical, following calibration*
      Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±50 ppm/month
  • Filter (per channel): 3-pole modified Butterworth; 3 dB down at 4 Hz; 60 dB down at 100 Hz
      Step-Response Settling Time (Full-Scale Output):
      To 1% of final value: 190 msec
      To 0.1% of final value: 265 msec
      To 0.02% of final value: 325 msec
  • Auxiliary Outputs: None
    *Initial (uncalibrated) inaccuracy may be as great as ±0.5% of full scale (see Accuracy Specifications"). Maximum error that could occur upon replacement of a Model 10A65-8 not followed by calibration is ±0.1% of full scale.


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