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Model 6038, 8-Channel Strain/Bridge Transducer Amplifier-Filter-Digitizer





Features

  • Programmable input configuration, 1/4, 1/2 & full bridge
  • Programmable excitation with remote sensing
  • Shunt & voltage calibration
  • Automatic zero & balance
  • 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 6038 input module has eight channels of programmable transducer signal conditioning amplifiers, filters and digitizer. Each channel has programmable voltage excitation, bridge completion and balance, programmable gain instrumentation amplifier and four-pole low pass filter. Channel outputs are multiplexed and digitized to 16 bits then provided to the 6000 data bus.

The 6038 is used with 1/4, 1/2 and full bridge transducers, potentiometers and low-level voltage signals. It is particularly suited to strain gages and bridge transducers. A shielded eight-wire input provides excitation, calibration and signal connections to the transducer. Excitation is programmable from 0 to 12 Volts for each channel. Remote sensing regulates excitation at the transducer eliminating line losses. The effect of loading or a short on any other channel is less than 0.01%. A calibration mode is provided to measure the excitation voltage applied to the transducer.

Gain calibration may be done by voltage substitution using an external traceable 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. Internal and external shunt is provided for transducer calibration. Calibration and gain and zero correction can be automated using Pacific's PI660 software. 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

None


Input

Configuration

8 channels, 2 to 8 wire with guard shield. Bridge configuration is programmable for 1/4, 1/2 and full bridge. Completion resistor is ±0.1%, desired value must be specified.

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, ±5 mV/V (350 Ohms) installed.

Impedance

50 Megohms, shunted by 1,000 pF.

Protection

±50 Volts differential, ±50 Volts common mode.


Excitation/Transducer Power

Voltage Excitation

Programmable from 0-12 Volts in 1 Volt ±0.1% steps, with 3.3 mV resolution adjustment.

Current

50 mA limited to 70 mA.

Regulation

±0.01% for ±10% line and no-load to full-load using remote sensing. Operation reverts to local sense if sense leads are not connected.

Stability

±0.01%, ±0.005 %/ºC.

Excitation Noise

200 µV peak-to-peak.

Monitor

Calibration mode applies excitation voltage to the amplifier input.


Amplifier

Gain

Programmable from 1 to 5,000 in 1, 2, 3, 5 10 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 (1 kHz)

0.5 µV rms, 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.

Frequency

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

Noise (Filter)

0.5 mV rms, RTO.

Other

Other filter characteristics and cut offs are available.


Digitizer

Sample

Simultaneous, within ±50 nS using sample & hold amplifier. Droop is less than ±0.005%.

Resolution

16-bits, two's complement output.

Sample Rate

0 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 programmable upper and lower limits and persistence checked on each ADC sample.


Calibration

Shunt

Single step shunt of internal completion resistor or external strain gage or bridge arm using dedicated input connector pins. Installed shunt resistor provides 0.502 mV/V (350 Ohm) or 0.172 mV/V (120 Ohm) ±0.5%.

Voltage Substitution

Alternate input for external calibration source. Programmable attenuator with steps of 1, 0.1 and 0.01, ±0.01% accuracy. Output of the attenuator is provided for calibration.

Zero Calibration

Amplifier input disconnected and shorted.


Mechanical

Mounting

Occupies one slot in Series 6000 enclosures.

Connectors

Inputs are on two 50-pin, Type D. connectors. Mating connectors supplied.

Operating Temperature

0 to +50 ºC


Ordering Information 

Ordering Information

6038 - 8-Channel Strain Gage/Transducer Amplifier-Digitizer, 8-Wire Input, 10 kS/s.


 DOWNLOADS 

Model 6038
(PDF, 93KB)



 Complementary to Model 6038 


Model 6014
Model 6014 8-Channel Accelerometer Amplifier-Filter-Digitizer


Model 6044
Model 6044 32-Bit Discrete Input/Output with Alarms

more available ..


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