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


  • 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


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 


Measurement Type

Strain Gage

Analog Bandwidth

1 kHz

Excitation/Transducer Power




Sample Rate (Digitizer)

Up to 10 kS/s

Analog Output

Monitor Output



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


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.


50 Megohms, shunted by 1,000 pF.


±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.


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


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


±0.01%, ±0.005 %/ºC

Excitation Noise

200 µV peak-to-peak.


Voltage monitor, ADC and analog output.



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


1 kHz


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



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


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

Noise (Filter)

2 mV peak RTO


Other filter characteristics and cut offs are available.



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


16-bits, two's complement.

Sample Rate

Up to 10 kS/s per channel
Up to 10

Digitizer Linearity

2 LSB (0.006%)


Monotonic to 15 bits.


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



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.



Occupies one slot in Series 6000 enclosures.


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


Model 6035
(PDF, 87KB)

 Complementary to Model 6035 

Model 6013
Model 6013 8-Channel Instrumentation Amplifier-Filter-Digitizer

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

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