Atec Endevco-133 User Manual

24 VDC

Charge Convertor

(0.303 mV/pC)

10-32 Connector

Gain = 3

Fault Detector

4-Pole Butterworth

Low-Pass Filter

or Other Options

10 Hz 4-Pole

High-Pole Filter

Gain:1, 10

BNC

Programmable

Gain: 0 to 100

0, 4, or

10 mA

BNC

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.

PE INPUT

ISOTRON
INPUT

Technical Drawing

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.

OUTPUT

Model 133

APPLIES TO CALIFORNIA FACILITY

PE and Isotron® signal conditioner

Specifications

The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75˚F (+24˚C) and 100 Hz,

unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied.

Inputs

Piezoelectric Single-ended with one side connected to signal ground
Maximum charge input
Source resistance > 10 Meg Ohms
Source capacitance < 30 000 pF
Isotron Single-ended with low side connected to signal ground
Constant excitation current Off, 4 mA or 10 mA, one range is valid for all 3 channels selectable through front panel or RS-232
Accuracy ± 15%
Compliance voltage < 22 VDC
Maximum input voltage < 22 Volts (AC + DC components)
Input impedance 100 MOhms and 33 000 pF

Outputs

AC voltage Single ended with one side connected to output signal ground. Signal proportional to input.
Maximum linear output 10 Vpk minimum
Display non-linearity Inherent error 1% of full scale reading

10 V = 1%; 1 V = 10%; 100 mV = 100%

Maximum current output 10 mA (10 V into a 1 kOhm load)
DC offset 15 mV maximum
Protection Short circuit protected

Transfer characteristics

Gain
Range Programmable from 0 to 1000
Resolution 0.0025, Eu 0 ≤ gain ≤ 10

0.025, Eu 10 ≤ gain ≤ 100

0.25, Eu 100 ≤ gain ≤ 1000

Accuracy ± 0.5% at 1 kHz after calibration, filters disabled, gain > 1
Linearity 0.1% of full scale, best fit straight line at 1 kHz reference
Noise Noise specification valid for the following conditions:

(a) unit in non-monitoring state
(b) internal standard 10 kHz 4-pole butterworth lowpass filter enabled
Piezoelectric 0.02 pC-RMS plus 0.006 pc-RMS per 1000 pF of source capacitance referred to input (RTI),
plus 1 mVRMS referred to output (RTO).
Isotron 20 μVRMS referred to input (RTI), plus 400 μVRMS referred to output (RTO). Input shunted
with a 249 Ohm (4 mA excitation) or 100 Ohms load (10 mA excitation).

Broadband frequency response ±5%, 0.1 Hz to 50 kHz, referenced to 1 kHz; -3dB at 100 kHz typical
Filter characteristics
High pass filter type 4-pole butterworth
Corner frequency (-3 dB) 10 hz ± 5 %
Corner frequency (-3 dB) 10 khz ± 12 % (other corners available by changing internal module 31875:

10 Hz to 80 kHz in 1, 2, 4, 6, 8 steps)
Crosstalk between channels 80 dB RTI minimum

≤

10 000 pC

Power requirements

Voltage Standard unit: 90-264 VAC 50 to 60 Hz; -1 option: 9-18 VDC
Power dissipation 9 Watts typical
Isolation No isolation channel to channel or signal ground to case ground

Physical characteristics

Dimensions 5.57” x 2.52” x 12”
Weight 4 lbs typical
Case material Black aluminum cover, medium grey plastic bezel

Included accessories

IM133 Instruction manual
EW599 Power cord
31875-1000 10 kHz 4-pole Butterworth
lowpass filter module
EP400 DC power plug (133-1 model only)

Optional accessories

35933 Application software
EJ847 RJ11 (6x4) straight wired inline coupler
EW1077 RJ114 conductor modular flat cable,
straight wired, 2 feet long
EW1027 RJ114 conductor modular flat cable,
straight wired, 7 feet long

Continued product improvement necessitates that Endevco reserve the right to modify these specifications without notice. Endevco maintains a program of constant surveillance
over all products to ensure a high level of reliability. This program includes attention to reliability factors during product design, the support of stringent Quality Control
requirements, and compulsory corrective action procedures. These measures, together with conservative specifications have made the name Endevco synonymous with reliability.

©ENDEVCO CORPORATION. ALL RIGHTS RESERVED 30700 RANCHO VIEJO ROAD, SAN JUAN CAPISTRANO, CA92675 USA
[phone] • [phone] fax [phone] • www.endevco.com • Email: [e-mail] 0608

EJ807 Serial DB9F /RJ-11 adaptor
EJ822 modular splitter adapter, 1 (6x4) male
to 3 (6x4) female
133-1 9-18 VDC input power option
31875-xxxx Low pass filter modules (see 31875 data sheet)
31979 Rack mounting kit
EJ21 10-32 microdot to bnc adapter
EHM1413 Desktop DC power supply
EHM1409 Automotive power plug
EHM1471 Blank panel

* Contact factory for J211 and ISO 6487 filter options.