Pacific Instruments, Inc. Pacific Instruments, Inc.
4080 Pike Lane
Concord, CA 94520
www.pacificinstruments.com
(925) 827-9010
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Products > Integrated Conditioning Acquisition & Control Systems > Integrated Conditioning Acquisition & Control System I/O Modules > 6000 Series Analog I/O Modules > Model 6035  


Model 6035, 8-Channel Strain/Bridge Transducer Amplifier-Filter-Digitizer

Features

  • Programmable input configuration, 1/4, 1/2 & full bridge
  • Voltage excitation programmable / regulated for each channel
  • Shunt & voltage calibration
  • Automatic balance & zero
  • Gains 1 to 5,000 with 0.05% accuracy
  • Four-pole, low-pass filter
  • Up to 10 KS/s per channel with 16-bit resolution
  • Two alarms with programmable upper & lower limits

Description

The 6035 input module has eight channels of programmable transducer signal conditioning amplifiers and digitizer. Each channel has programmable voltage excitation, bridge completion and balance, programmable gain instrumentation amplifier, four-pole low pass filter and sample and hold amplifier. Channel outputs are multiplexed and digitized to 16 bits then provided to the 6000 data bus. In addition to the digitized output, each channel has an analog output providing a means to monitor or record each channel.

The 6035 is used with 1/4, 1/2 and full bridge transducers, potentiometers and low-level voltage signals. It is particularly suited to strain gages. A shielded four-wire input provides signal and excitation connections to the transducer. Excitation is programmable from 0 to 12 Volts for each channel. Individual excitation regulators and careful routing of power traces and grounds results in less than 0.01% effect due to loading or a short on another channel. A calibration mode is provided to measure the excitation voltage.

Gain calibration may be done by voltage substitution using an external voltage standard. A calibration attenuator enables the voltage standard to be used on its highest accuracy ranges and has a post-attenuator output for accuracy verification. Bipolar shunt is provided for transducer calibration. Calibration and gain and zero correction can be automated using software such as Pacific’s PI660. Two alarms with programmable upper and lower limits are provided.





Overview  · Input  · Excitation/Transducer Power  · Amplifier  · Filter  · Digitizer  · Calibration  · Mechanical  · Ordering Information 

Overview

Measurement Type
Bridge
Strain Gage

Analog Bandwidth
1 kHz

Excitation/Transducer Power
Voltage

Filter
4-Pole

Sample Rate (Digitizer)
Up to 10 kS/s

Analog Output
Monitor Output


Input

Configuration
8 channels, 2 to 4 wires plus shield for bridge and voltage. Programmable completion for 1/4, 1/2 and full bridge.

Balance
Automatic by program control. Balance accuracy ±0.05% of range, ±1 mV RTO. Stability ±0.02% for 8 hours, ±0.005 %/ºC. Range set by resistor up to 10 mV/V, 2 mV/V (350 Ohms) is installed.

Impedance
50 Megohms, shunted by 1,000 pF.

Protection
±50 Volts differential, ±30 Volts common mode.


Excitation/Transducer Power

Voltage Excitation
Programmable for each channel from 0 to 12 Volts in 1 Volt ±0.1% steps and 3.3 mV resolution fine adjustment.

Current
50 mA, limited to 70 mA. Short on one channel has less than ±0.01% affect on other channels.

Regulation
±0.2% line and no-load to full-load measured at the input connector.

Stability
±0.01%, ±0.005 %/ºC

Excitation Noise
200 µV peak-to-peak.

Monitor
Voltage monitor, ADC and analog output.


Amplifier

Gain
Programmable from 1 to 5,000 in 1, 2, 3, 5, steps with ±0.05% accuracy.

Gain Stability
±0.01%, ±0.004%/ºC.

Linearity (Amplifier)
±0.01% for gains < 1,000, ±0.02% for gains 1,000 and higher.

Common Mode
60 dB plus gain in dB up to 106 dB, DC to 60 Hz for ±10 Volts.

Zero (Amplifier)
Automatic to ±1 µV RTI, ±0.5 mV RTO.

Zero Stability
±5 µV RTI, ±1 mV RTO, ±1 µV/ºC RTI, ±0.2 mV/ºC RTO. Short term: ±2 µV RTI, ±0.4 mV RTO for 8 hours.

Source Current
±2 nA, ±0.01 nA/ºC

Noise (10 Hz)
0.5 µV peak, RTI.

Noise (1 kHz)
1.5 µV peak, RTI

Bandwidth
1 kHz
-3 dB

Recovery
800 µS to ±0.1% for 10X overload to ±10 V.


Filter

Type
Four-pole, low-pass Butterworth with programmable bypass.

Frequency
Plug-in, 4 Hz to 1 kHz, 10 Hz supplied.

Noise (Filter)
2 mV peak RTO

Other
Other filter characteristics and cut offs are available.


Digitizer

Sample
Simultaneous, within ±50 nS channel-to-channel. Droop is less than ±0.005%.

Resolution
16-bits, two's complement.

Sample Rate
Up to 10 kS/s per channel
Up to 10 kS/s

Digitizer Linearity
2 LSB (0.006%)

Continuity
Monotonic to 15 bits.

Alarms
Two alarms each with upper and lower limits that are programmable from negative to positive full scale. Limits checked on each ADC sample.


Calibration

Shunt
Programmable bipolar shunt. Installed resistor provides 0.502 mV/V ±1% for 350 Ohm bridge.

Voltage Substitution
Alternate amplifier input for external voltage calibrator. Programmable attenuator steps of 1, 0.1 and 0.01 with ±0.02% accuracy. Output of the attenuator provided on rear panel connector for accuracy verification.

Zero Calibration
Amplifier input disconnected and shorted.


Mechanical

Mounting
Occupies one slot in Series 6000 enclosures.

Connectors
Input connectors are 50-pin Type D, output connectors are 9-pin Type D. Mates are supplied.

Operating Temperature
0 to +50 ºC


Ordering Information 

Ordering Information
6035 - 8-Ch Strain-Bridge, 4-Wire Input

Pacific Instruments, Inc. · 4080 Pike Lane · Concord, CA 94520 · www.pacificinstruments.com