Endevco® model 133 piezoelectric and Isotron® signal conditioner0 pages

Model 133
PE and Isotron® signal conditioner
Features

Description

• Three-channel PE/Isotron® signal conditioner
• 100 kHz bandwidth (-3dB Corner)
• Built-in 4-pole Butterworth high-pass filter
with optional corner frequencies
• Gain range 0 to 1000
• RS-232 serial interface
• 12 VDC power option
• Meets filter requirements of J211 and ISO 6487*

The Endevco® model 133 is a three-channel, Piezoelectric
and Isotron signal conditioner that is manually or computer
programmable. Manual control is accomplished at the front
panel by means of a “Select Channel” push-button, three (3)
“Channel LEDs”, one “Select Function” push-button, seven
“Function LEDs”, a four character LED display, showing the
state of each function/channel, and four “Edit” push-buttons
to change the entries in the LED display. There are three
LEDs used as fault status indicators for open/short at the
Isotron inputs. Computer control is accomplished using the
standard RS-232 port and optional application software.
There are two modes of operation, Normal and
Programming/Setup. Both modes of operation utilize the
front panel LED display. In the Normal Mode, there are two
states, Monitoring and Non-Monitoring. In the Monitoring
state the LED display indicates the RMS valve (±10%) of the
signal present at the output of the selected channel. The
Non-Monitoring state turns off the LED display for lower
noise applications and to minimize power consumption.
In the Programming Mode, the unit is ready for manual
programming of existing channel setups. The unit will
automatically return to the Normal Mode of operation after
20 seconds of inactivity of the front panel or after pressing
the “Select Function” pushbutton while the “Monitoring
State” function LED is flashing.
The rear panel contains an RJ-11 connector for the RS-232
serial communications port, an input power connector, and
on a per-channel basis, a BNC output connector, a 10-32
input connector for the PE input, and a BNC connector for
the Isotron input. Three model 133 units may be installed in
a 19-inch rack mount adapter. The standard unit is powered
by 90-264 VAC, 50/60 Hz. The -1 option is powered by 9 to
18 VDC, making it ideal for portable use in automobile test
applications.

10-32 Connector

PE INPUT

Charge Convertor
(0.303 mV/pC)
Gain = 3
24 VDC

ISOTRON
INPUT

BNC

0, 4, or
10 mA

Programmable
Gain: 0 to 100
4-Pole Butterworth
Low-Pass Filter
or Other Options

10 Hz 4-Pole
High-Pass Filter

Gain:1, 10
Fault Detector

Technical Drawing

BNC

OUTPUT