The 6165 is a two-channel amplifier-filter module. Each channel
has isolated input, 50 kHz bandwidth and two outputs that can be
filtered or wideband. Bandwidth of 100 kHz is optional.
The input is two-wire shielded and is isolated from the outputs,
power and control interface. This gives the user complete freedom
to ground the input without creating ground loops that introduce
noise and offset errors. The isolation provides for operation
with up to ±300 Volts of common mode applied to the input.
The differential instrumentation amplifier has programmable gains
from 1 to 5,000 and automatic zero. The standard filter is a
six-pole Bessel with four programmable bandwidths and
wideband. An optional four-pole Bessel filter has continuously
programmable bandwidth with 1 Hz resolution below 1 kHz and
5 Hz above 1 kHz. Each channel has two buffered, ±10 Volt outputs.
The output can be digitally monitored using any of the supported
interfaces.
Voltage substitution calibration, employing an external standard,
is provided for gain calibration. Automatic zero and gain calibration
are implemented in PI610 software.
Specifications - Model 6165
Input
2 wire plus shield
Voltage Calibration
Alternate input for external calibration source.
Programmable 1, 0.1 and 0.01, attenuation with
±0.02% accuracy. Attenuator output may be connected
to bus for external monitoring.
Zero Calibration
Amplifier input disconnected and shorted for zero
Input Impedence
50 Megohms, shunted by 500 pF
Input Protection
±50 Volts, differential and ±350 Volts common mode.
Range
±2 mV to ±10 Volts full scale.
Gain
Programmable from 1 to 5,000 with 0.05%
resolution. Sixteen calibrated gain steps are provided: 1, 2, 3,
5, 10, 20, 30, 50, 100, 200, 300, 500, 1,000,
2,000, 3,000 and 5,000 with ±0.05% accuracy.
Common Mode
60 dB plus gain in dB to 120 dB for balanced input and 110 dB for a 350 Ohm source unbalance, DC to 60 Hz.
Bandwidth
50 kHz (-3 dB), 100kHz (-3 dB) optional.
Linearity
±0.01% for gains < 1000,.±0.02% for gain 1000 and higher.
Output
Two ±10 Volt full scale buffered outputs. Each may
be program selected for filtered or wideband
response.
Standard Filter
Six-pole low-pass Bessel filter with bandwidths of 150 Hz, 625 Hz, 2.5 kHz, 10 kHz and wideband. Other filter frequencies are available on request.
Filter (Option HF)
Four programmable filter bandwidths, 300 Hz,
1.25 kHz, 5 kHz, 20 kHz and wideband.
Isolated excitation and input
