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6 products
CARDS - SYSTEM 495
System 495 Back to 495
Specifications:
Full Scale Input: 12 programmable steps provide
bipolar input
ranges from 5mV to 10.24 V
Full-Scale Accuracy: ± 0.1% of FS at zero frequency
Full-Scale Stability: ± 0.02% of FS at constant temperature;
± 0.005%/° C
Input Impedance: 10 Megohms shunted by 500 pF.
Source Current: Less than 1.0 nA at 25 oC, ± 0.1 nA/oC.
Zero Stability: ±5 uV RTI ± 1.0 mV RTO at constant
temperature; ±1.0 uV/oC RTI, ±100 uV/oC
RTO.
Noise: BW Noise, 3 Sigma
100.00 KHz 57 uV RTI + 2 mV RTO
10.00 KHz 18 uV RTI + 2 mV RTO
1.00 KHz 6 uV RTI + 1 mV RTO
Common Mode Voltage: ± 10 Vdc peak AC operating, ± 30 V
without damage.
Common Mode Rejection: 66dB + gain in dB to 120dB max, dc to
60 Hz with 350-ohm source imbalance.
Filter: 6-pole Bessel filter with four programmable
cutoff frequencies. Each frequency is
determined by a plug-in resistor network
over the range of 100 Hz to 200 KHz.
Default frequencies are 10 KHz, 20 KHz,
50 KHz and 100 KHz.
Phase Coherency: Phase shift matched channel-to-channel
within 5 degrees with amplifiers on same
gain and filter step, dc to cutoff.
Voltage Substitution Calibration: Solid state relay provided to switch amplifier
input terminals to common CAL bus under
program control.
Excitation Supply Feedback: Solid state relay provided to switch amplifier
input terminals to excitation supply sense
lines under program control.
Shunt R Calibration: Solid state switch to apply shunt resistor
across bridge arm under program control.
Switch ON resistance less than 30 ohms.
Auto-Balance: Auto-balance DAC outputs a voltage between
0 and the excitation supply voltage level.
Bridge Conditioner
Mode Board: Plug on circuit board provided to mount bridge
completion, shunt R cal and balance limit
resistors. 1, 2 and 4 arm circuits may be used
with either local or remote supply sensing.
Excitation Supply:
Output Voltage: Programmable over the range of 0 to
10 volts with a 12-bit DAC.
Output Current: 100 mA maximum operating current;
short-circuit protected.
Output Noise: Less than 100 uV pk-pk in 1 KHz bandwidth.
Line Regulation: Less than 0.1% change for 10% line variation.
Load Regulation: Less than 0.1% change from no load to full
load.
Remote Sensing: Positive and ground sense leads are
provided for remote sensing.
8-Input Trigger Module Back to 495
The 495030 Trigger module provides eight trigger input signals for the
system. Optic coupling is used to isolate all inputs from each other
and from system ground. Each input may be configured for either TTL
or high voltage AC/DC operation by means of plug-on jumper links.
Schmitt trigger gates are employed to further enhance noise immunity.
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Neff Instrument Corporation
CARDS - SYSTEM 620/600
Series 600 (620650, 620654) Back to 600
Specifications:
Speed: Program selected:100 KHz or 50 KHz.
Ranges: Program
selected; 12 binary steps:
100 KHz: ±5 mV FS to ±10.24V
50 KHz: ±0.625 mV FS to ± 10.24V.
Filter: F 0 = 1 Hz, 10 Hz, 100 Hz and 1KHz.
620650: 2-Pole Butterworth
620654: 6-Pole Butterworth
Resolution: 16-bits (15 + sign bit).
Basic Accuracy: ± (0.02% FS + 2 uV) for 30 days at
constant temperature after automatic
calibration; includes effects of gain error,
offset, non-linearity, and non-overloading
crosstalk.
Gain Stability ± 0.002% FS/oC change from automatic
calibration temperature.
Zero Stability ± 1.0 µV/oC change from automatic
calibration temperature.
Input Configuration: Guarded differential input on each channel;
floating or grounded signal sources measured
without degradation.
Common Mode
Voltage, Operating: ± 10 Vdc or peak ac.
Common Mode
Rejection Ratio: 120 dB max (66 dB + gain in dB + filter
attenuation), dc to 60 Hz with 350 ohm
source imbalance.
Source Current: ± (1 nA @ 23oC + 0.1 nA/oC).
Input Overload
Without Damage: ± 100 Vdc or peak ac, common mode
or normal mode.
Sample & Hold
(620654 preamp only):
Acquisition Time: 30 uS.
Droop (Hold Mode ): 0.5 mV/mS.
Aperture Uncertainty: 100 nS, max.
Noise: Total Noise RTI = [(N1)2 + (N2)2]1/2 /A
where N1 = RTI noise; N2 = RTO noise;
A = system gain = 10.24 V/FS Range.
Noise specifications are 3 Sigma limit, peak-to-peak.
f0 N1 N2
1Hz 1uV 2500uV
10Hz 1uV 2500uV
100Hz 2uV 2500uV
1KHz 6uV 2500uV
Offset: Included in basic accuracy specification.
Static Crosstalk: Included in basic accuracy specification.
Crosstalk (Adjacent
Channel Overload): ±0.02% FS (only affects channel following
overloaded channel in scan list).
Non-Linearity: Included in basic accuracy specification.
Automatic Calibration: On command, uP adjusts zero and gain of each
channel to within basic accuracy specification
and verifies calibration.
Analog Output: Unfiltered (wideband) output at ±5 mA from each
preamp; available at rear panel.
Control/Display Panel: 32-character alphanumeric display and
keypad for entering instructions.
Autorange (50 KHz only): Post amplifier provides autorange over a
1-to-32 gain range in six steps. Combined
with preamp gain, the following ranges are
available:
Preamp Gain Autoranges
512 ±0.625 mV to ±20 mV
64 ±5 mV to ±160 mV
8 ±40 mV to ±1.28 V
1 ±320 mV to ±10.24 V
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Neff Instrument Corporation
CARDS - SYSTEM 730
System 730 (730060) Back to 730
Specifications:
Full Scale Inputs: Twelve programmable steps provide bipolar
input ranges of ± 5mV to ±
10.24V Full
Scale
Accuracy, dc: ± (0.02% FS + 2 uV) for 30 days
at constant temperature
Zero Stability: ± 1m V/° C change from calibration temperature.
Passband Ripple: < 0.005dB
Channel-to-Channel
Phase Match: 1° for passband frequencies to 3KHz
(8KHz sample rate).
AC Coupling: -3dB at 1.0Hz
Input Impedance:
dc Coupled: 10 M Ohms in parallel with 500pF
ac Coupled: 1 M Ohms in parallel with 500pF.
Common-Mode
Rejection: 66dB + gain in dB to 120dB max.,
dc to 60Hz with 350 Ohm source imbalance,
in dc coupled mode.
Voltage Substitution
Calibration: Solid state relay provided to switch amplifier
input terminals to common CAL bus under
program control.
Stopband Rejection: -120dB Unfiltered, ± 10.24V @ 5mA from
each channel.
Excitation Supply: Programmable to 10V with 12 bit resolution,
50 mA per channel. Excitation supply readback
supported.
Autobalance: 12 bit resolution. Invoked by computer.
Physical Dimensions: 7-inch panel height in 19" rack; 23-inch depth
behind front panel. NEFF recommends that
assemblies be mounted in a 19-inch rack with
30-inch depth to accommodate connector build-up.
Power Requirements: 105V to 130V (220V to 250V), 50 to 400 Hz, 700W.
Cooling Requirements: To be mounted in cabinet with unobstructed
airflow and equipped with a 300cfm blower.
Environmental: 0° C to 50° C, 90% relative humidity. Will
withstand shock and vibration of normal
shipping and handling of laboratory equipment.
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Neff Instrument Corporation
