Model 6037 - 8-Channel Strain Gage Amplifier-Digitizer

8-Channel Strain Gage Amplifier-Digitizer

Model 6037

FEATURES

Excitation 0 to 12 Volts programmable by channel

Automatic gain ranging

Automatic balance and zero

Programmable four-frequency low-pass filter

10K samples/second with 16-bit resolution

Strain gage simulation resistor

Bipolar shunt calibration

DESCRIPTION

The 6037 has eight channels of strain gage or transducer signal conditioning amplifiers and digitizer. Each channel has programmable voltage excitation, programmable bridge completion and automatic balance, programmable gain instrumentation amplifier, four-pole low-pass filter and sample and hold amplifier. The amplified channel outputs are multiplexed and digitized to 16 bits then provided to the 6000 data bus.

The 6037 is designed for use with strain gages employing the 3-wire connection. It may also be used with ½ and full bridge transducers, potentiometers and low-level voltage signals. 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 other channels. A calibration mode is provided for accurate measurement of excitation voltage.

Benefits of Automatic Gain Ranging

Automatic gain ranging can save considerable setup time and provide the highest signal to noise ratio by insuring that the output level is the highest possible without overscale. Further, it prevents data loss by reducing the gain for channels that go into overscale.

The user has full control to enable or disable autoranging and set the autoranging parameters. Gain ranges down when the high limit is reached in the positive or negative direction and the high-limit persistence time elapses. Both the limit and persistence are programmable. Gain ranges up when the low limit is reached in the positive or negative direction and the low-limit persistence time elapses. Upper and lower limits and their persistences are independently programmable.

Gain for each channel is read and recorded by including phantom channels 8 and 9 in the scan list. A four-bit binary code identifies one of the sixteen possible gain steps that corresponds with the digitized data for each channel PI660 has a text display of gains. When using automatic gain ranging it is important that all gain steps be gain and offset calibrated for highest accuracy. PI660 Software performs this calibration providing NIST traceability.


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