3B16 AD [Analog Devices], 3B16 Datasheet - Page 2

• Manufacturer Part Number: 3B16
• Description: Narrow Bandwidth Strain Gage Input
• Manufacturer: AD [Analog Devices]

GENERAL DESCRIPTION
The 3B16 is a single-channel signal conditioning module which
interfaces, amplifies, and filters signals from 4-arm full-bridge
strain-gage bridges with a resistance from 300W to 1kW. The
module provides a constant +10V bridge excitation voltage and
provides simultaneous precision voltage and current outputs.
The user-configurable Model 3B16-00 can be applied in
applications involving large tare weights which must be
compensated with zero suppression. The 3B16 protects the
computer side from damage due to field-side over-voltage faults
up to 130V rms. In addition, the current output withstands
130V rms without damage and interfaces user equipment
through screw terminals located on the 3B Series backplane.
The 3B16 is a plug-in, mix-and-match, hot-swappable module
which is easily field calibrated via front-panel zero and span
adjustments for both voltage and current outputs.
3B Series Custom-Ranging Program – Externally-
programmable Model 3B16-00, enables the user to configure a
special input range, including tare weight suppression, by using
the optional plug-on AC1310 ranging card, which houses user-
supplied resistors to determine zero and span. To facilitate
.
Rev. 0 | Page 2 of 8
Figure 2
selecting resistors, a Windows program, 3B-CUSTOM,
calculates resistor values based on the user-desired input/output
ranges.
A chopper-stabilized low-drift (+1uV/
assures long-term stability. At the amplifier input, a stable, zero-
scale input voltage is subtracted from the input signal to set the
zero-scale value. Zero suppression can exceed 100% of the input
range. This is ideal for expanded-scale applications requiring
high-resolution measurement of a selected portion of an input
signal. For user convenience, the zero and span can be factory
configured to meet custom range needs (Model 3B16-
CUSTOM) or can be externally programmed (Model 3B16-00)
via user supplied resistors inserted in the optional AC1310 plug-
on ranging card. Internal low-pass filtering with a 3 Hz cutoff
(-3dB) two-pole Butterworth filter enhances a 60 dB normal-
mode rejection at 50/60 Hz, enabling accurate measurement of
small signals in high electrical noise.
o
C) input amplifier
.
3B16