Precision 28118

Octal-Channel Bridge Conditioner with Constant Voltage Excitation

Precision 28118

for the 28000 Analog Signal Conditioner

Overview

28000 Analog Signal Conditioning System

Precision 28118 Features

• Eight channels per card, 128 channels per 28016 chassis
• Balanced programmable constant voltage excitation with remote sense
• Up to 20 V delivered to the bridge
• ±10 Vcm operation
• Up to 100 kHz filtered bandwidth or 190 kHz “wide-band” bandwidth
• 2- to 6-wire plus shield transducer input interface
• Automatic bridge balance/transducer suppress
• Programmable amplifier: x1/16 to x1024 with 0.05% vernier
• Distributed gain to provide reserve against out-of-band signal such as transducer resonances
• 4-pole low-pass filters with programmable pulse/flat characteristics
• 2° phase matching between any channels
• Overload detection
• Auxiliary front panel output connection to support
  the use of custom output modules
  (for unit without option 4)

28118 Applications

• Strain gage conditioner
• Load cell conditioner
• Pressure transducer conditioner
• Piezoresistive transducer conditioner
• General purpose bridge conditioner
• Potentiometer conditioner
• Low level AC or DC amplifier
  (<1 mV to 10 V inputs)
• Anti-aliasing filter/amplifier

The new standard for the world’s
most discriminating test labs.

The Precision 28000 signal conditioning system provides all the flexibility you need to manage your test measurements.

The Precision 28000 makes it easy to manage a test, with hundreds of channels and a mix of transducers. Choose charge, IEPE w/TEDS, voltage (filter amplifier), strain, thermocouple, RTD, potentiometer, current, frequency, or other transducers.

The built-in test hardware and software (optional) provide quick Go/No-Go tests, which can be run before each test, and rigorous Factory Acceptance Tests to assure you that the 28000 meets your most stringent requirements for critical applications. It won’t be long before these tests earn a permanent place in your maintenance routine. And since they are traceable to NIST, they eliminate the need for off-site calibration.

In every phase of your tests—record keeping, installation, design, setup, operation, main­tenance, and upgrading—the Precision 28000 offers ways to help you save time and money over the life of the system.

28000 System Features

• Graphical user interface (GUI) and Ethernet network interface for system control
• Intelligent gain and system scaling algorithms
• Test input and output monitor busses
• Go/No-Go test with diagnostics to be used before tests
• Rigorous Factory Acceptance Test for maintenance
• Field-swappable AC power supplies
• Built-in temperature and power supply monitoring with alarms

28118 Octal-Channel Bridge Conditioner with Constant Voltage Excitation offers eight channels of conditioning to support a wide variety of transducers, including those that require constant voltage excitation. Balanced constant voltage excitation in a bridge configuration supports applications such as strain gages and pressure transducers. The 28118 is easily configured to operate as a precise voltage filter/amplifier for low-level voltage inputs.