Bently Nevada 1900/65A Specifications
1900/65A General Purpose Equipment Monitor
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The 1900/65A General Purpose Equipment Monitor is
designed to continuously monitor and protect equipment that
is used in a variety of applications and industries. The
monitor’s low cost makes it an ideal solution for generalpurpose machines and processes that can benefit from
continuous monitoring and protection.
Inputs
The 1900/65A provides four transducer inputs and four
temperature inputs. Software can configure each transducer
input to support 2- and 3-wire accelerometers, velocity
sensors or proximity sensors. Each temperature input supports
Type E, J, K, and T thermocouples, and 2- or 3-wire RTDs.
Outputs
The 1900/65A provides six relay outputs, four 4-20 mA
recorder outputs, and a dedicated buffered output. The user
can use the 1900 Configuration software to configure the relay
contacts to open or close according to the OK, Alert and
Danger statuses of any channel or combination of channels,
and to provide data from any variable from any channel on any
recorder output. The dedicated buffer output can provide the
signal for each transducer input.
A Modbus Gateway option allows the monitor to provide
static variables, statuses, event list, time and date information
directly to any Modbus client, including Distributed Control
Systems (DCSs), Supervisory Control and Data Acquisition
(SCADA) systems, Programmable Logic Controllers (PLCs), or
System 1 software. The monitor uses an internal counter and a
Modbus client/master time reference to generate time and
date information. Users can upgrade monitors without the
Modbus Gateway by ordering the 1900/01 Communications
Upgrade (see the Ordering Information section). The 1900/65A
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1900/65A General Purpose Equipment Monitor
Datasheet
supports Modbus communications via Ethernet
and a software-configurable RS232/485 serial
port.
Configuration
The user defines monitor operation and the
Modbus Gateway register map by using
software running on a laptop or PC to create a
configuration file and download the file to the
monitor through the built-in Ethernet
connection. The 1900/65A permanently stores
configuration information in non-volatile
memory, and can upload this information to the
PC for changes.
Display Module
The 1900/65A supports an optional
display/keypad to view channel information or
make minor configuration changes. This allows
the 1900/65A to operate as a stand-alone
package. If desired, the user can mount the
display up to 75 metres (250 feet) from the
Monitor Module.
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processes up to four variables per
channel.
Specifications
Inputs
Transducer Inputs
Users can configure Channels 1 through 4
to accept input from acceleration, velocity
or displacement transducers.
Transducer Channel Types
Channel Types define the functionality
for processing that will be applied to an
input signal and the kind of variables or
measurement values that will be derived
from this input. Channel Types also
define the kind of sensor that must be
used. Transducer Channel Types include:
l Acceleration or Reciprocating
Acceleration
l Velocity or Reciprocating Velocity
l Radial Vibration (shaft vibration)
l Thrust (shaft axial displacement)
l Position
l Speed
Vibration
Acceleration
Enveloping
Bias Voltage
Up to three bandpass filtered
amplitude measurements.
Users can apply the acceleration
enveloping algorithm to one
Acceleration or Reciprocating
Acceleration Variable.
Users may assign the value of the
transducer bias voltage to any of the
variables.
Configuration Options
Each variable is independently
configured with the following
options.
Vibration
Variables
Enveloped
Variable
l Peak or RMS
l Metric or English
l Filter corner
l Full scale range
l Acceleration
l Filter corner
l Standard or
units
frequencies
integrated to
velocity
frequencies
Enhanced
demodulation
Acceleration and Reciprocating
Acceleration Channel Types
The Acceleration Channel Type and
Reciprocating Acceleration Channel Type
support two- and three-wire acceleration
sensors. The Reciprocating Acceleration
channel type has timed OK channel defeat
disabled.
Acceleration Variables and
Reciprocating Acceleration Variables
Acceleration Variables and Reciprocating
Acceleration Variables are filtered and
processed measurements from raw
transducer signals. The Acceleration
Channel Type and Reciprocating
Acceleration Channel Type continuously
Filters
Vibration
Variable
Enveloping
High-Pass
Enveloping
Low-Pass
Enveloped
Variable HighPass
Enveloped
Variable LowPass
Bias Filter 0.01 Hz 1-pole low-pass
OK Filter 2.4 kHz 1-pole low-pass
0.5 Hz – 25 kHz configurable 4-pole highpass, 4-pole low-pass
25 Hz to 5 kHz, configurable 4-pole
125 Hz to 25 kHz, configurable 2-pole
0.1 Hz min., but greater than Enveloped
Variable low-pass 2-pole
Greater than Enveloped Variable high-pass
and less than Enveloping high-pass 4-pole
Full Scale Range
Vibration
20 to 500 m/s2 (2 to 50 g) peak
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and RMS
Enveloped
Integrated
Bias Voltage -24 V
20 to 500 m/s2 (2 to 50 g) peak
and RMS
10 to 100 mm/s (0.4 to 4 in/s)
peak and RMS
Accuracy
Vibration Variables ±1% of full scale range
Input Impedance
3-wire Voltage Mode 10 kΩ
Velocity and Reciprocating Velocity Channel Type
The Velocity Channel Type and
Reciprocating Velocity Channel Type
support two-wire and three-wire piezovelocity sensors.
units
l Filter corner
frequencies
l Full-scale range
l Velocity integrated
to displacement
Filters
Vibration
Variables
Bias Filter 0.09 Hz 1-pole low-pass
OK Filter: 2.4 kHz 1-pole low-pass
0.5 Hz to 5.5 kHz, configurable 8-pole highpass, 4-pole low-pass
Full Scale Range
Vibration 10 to 50 mm/s (0.5 to 2 in/s) peak and RMS
Integrated 100 to 500 μm (5 to 20 mils) peak to peak
Bias Voltage -24 V
Accuracy
Vibration Variables ±1% of full scale range
Input Impedance
Velocity Variables and Reciprocating
Velocity Variables
Velocity Variables and Reciprocating
Velocity Variables are filtered and
processed measurements from raw
transducer signals. The Velocity Channel
Type and Reciprocating Velocity Channel
Type support up to four continuously
calculated variables per channel.
Vibration
Bias
Voltage
Up to three bandpass filtered amplitude
measurements.
Users may assign the value of the
transducer bias voltage to any of the
variables.
Configurable Options
Each variable is independently
configured with the following
options.
Vibration
Variables
l Peak or RMS
l Metric or English
3-Wire Voltage Mode 10 kΩ
Radial Vibration Channel Type
The Radial Vibration Channel Type
measures radial shaft motion using
proximity sensors.
Radial Vibration Variables
Radial Vibration Variables are filtered and
processed measurements from raw
transducer sensors. The Radial Vibration
Channel Type supports up to four
continuously calculated variables per
channel.
Direct
Gap Gap voltage
Vibration
Configurable Options
Up to three bandpass filtered amplitude
measurements
Up to three bandpass filtered amplitude
measurements
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Each variable is independently configured
with the following options.
Vibration Variables
l Metric or English
units
l Filter corner
frequencies
l Number of filter
poles
l Full-scale range
Filters
Direct Filter 1 4 to 4000 Hz (240 to 240,000 RPM)
Direct Filter 2
Direct Filter
Characteristics
Gap Filter 0.09 Hz 1-pole low-pass
Vibration Variables
OK Filter 2.4 kHz 1-pole low-pass
1 to 600 Hz (60 to 36,000 RPM)
High-pass set by attack and decay,
1-pole low-pass
0.5 Hz to 4 kHz, configurable
1-, 2-, or 4-pole high-pass and low-pass,
configurable
Full Scale Range
Direct 100 to 500 μm (3 to 20 mils) peak-to-peak
Gap -24 V
transducer signals.
Position Axial position of shaft
Gap Gap, voltage or position
Configurable Options
Each variable is independently configured
with the following options.
Position Variables
Metric or English units
Full-scale range
Filters
Direct Filter: 1.2 Hz 1-pole low-pass
Gap Filter 0.41 Hz 1-pole low-pass
OK Filter: 2.4 kHz 1-pole low-pass
Full Scale Range
Position
Gap -24 V
1 to 4 mm (50 to 150 mils) span with adjustable
zero position
Accuracy
Position Variables ±1% of full-scale range
Accuracy
Vibration Variables ±1% of full-scale range
Input Impedance
Non-configurable 10 kΩ
Thrust Channel Type
The Thrust Channel Type measures axial
shaft motion using proximity sensors.
Thrust Variables
Thrust Variables are filtered and
processed measurements from raw
Input Impedance
Non-configurable 10 kΩ
Position Channel Type
The Position Channel Type measures
mechanical motion using proximity
sensors.
Position Variables
Position Variables are filtered and
processed measurements from raw
transducer signals.
Position Mechanical position
Gap Gap, voltage or position
Configurable Options
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Each variable is independently configured
with the following options.
Position Variables
Metric or English units
Full- scale range
Filters
Direct Filter 1.2 Hz 1-pole low-pass
Gap Filter 0.41 Hz 1-pole low-pass
OK Filter 2.4 kHz 1-pole low-pass
Full Scale Range
Position
Gap -24 V
1 to 28 mm (50 to 1100 mils) span with adjustable
zero position.
Accuracy
Position Variables ±1% of full scale range
Input Impedance
Non-configurable 10 kΩ
Speed 100 - 100,000 rpm
Events Per Revolution
EPR 0.001 to 1000
Accuracy
Speed Variables: ± 0.5 RPM + 0.015% of reading
Input Impedance
Non-configurable 10 kΩ
Temperature Inputs (Ch. 5 – 8)
Channels 5 through 8 support Type E, J, K,
and T thermocouples, and 2- and 3-wire
RTDs.
Temperature Variable
Temperature variables are processed
measurements from raw transducer
signals. The temperature channel type
processes one temperature variable per
channel.
Speed Channel Type
The Speed Channel Type measures speed
using proximity sensors.
Speed Variables
Speed Variables are filtered and
processed measurements from raw
transducer signals.
Speed Up to 4 speed measurements
Gap Gap, voltage
Configurable Options
Each variable is independently configured
with the following options:
Gap Filter 0.09 Hz 1-pole low-pass
OK Filter 2.4 kHz 1-pole low-pass
Full Scale Range
Configurable Options
Each Variable is independently configured
with the following options.
Units °C or °F
Filters
Analog Filter 50 Hz 1-pole, low-pass
Digital Filter
Notch filter will attenuate the first 5
orders of 50 Hz and 60 Hz (49 Hz to 61
Hz) by a minimum of 100 dB.
Full Scale Range
Type E -200 to 1000 ºC (-328 to 1832 ºF)
Type J -210 to 1200 ºC (-346 to 2192 ºF
Type K -200 to 1370 ºC (-328 to 2498 ºF)
Type T -200 to 400 ºC (-328 to 752 ºF)
10 Ω Cu
α=0.00427
-200 to 260 ºC (-328 to 500 ºF)
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120 Ω Ni
α=0.00672
100 Ω Pt
α=0.00385:
100 Ω Pt
α=0.00392:
-80 to 260 ºC (-112 to 500 ºF)
-200 to 850 ºC (-328 to 1562 ºF)
-200 to 700 ºC (-328 to 1292 ºF)
Accuracy
All
Thermocouple
Types
3-Wire RTD
(except 10 Ω
Cu)
3-Wire RTD 10
Ω Cu
2-wire RTD
Types
±1 °C (±1.8 °F) typical @ 25 °C (77 °F)
±2.5 °C (±4.5 °F) maximum for
thermocouple measurements over –100 °C
(148 °F)
±5 °C (±9 °F) maximum for thermocouple
measurements below –100 °C (-148 °F)
±1.5 °C (±2.7 °F) + 0.5 % full scale
±3 °C (±5.4 °F) + 0.5 % full scale
2-wire RTDs have additional errors due to
field wire resistance and variations in the
field wire resistance due to changes in
ambient temperature.
Input Impedance
Thermocouple Inputs >1 MΩ
or close contacts according to userdefined logic statements. Logic
statements use the OK, Alert and Danger
statuses of any channel, or combination of
channels as inputs.
Logical Operators
AND bypassed channels ignored
True AND bypassed channels included
OR
Logical Operands
Monitor Inhibit
Monitor Not OK
Monitor Danger
Monitor Alert
Channel Not OK
Channel Danger
Channel Alert
Variable Danger
Variable Alert
Alarm Status Time Delays
Position/ Vibration Inputs
Minimum 0.1 second
Maximum 60 seconds
Adjustment Resolution 0.1 second
Temperature / Speed Inputs
Minimum 1 second
Maximum 60 seconds
Adjustment Resolution 0.1 second
Relays
Relay Logic
The 1900/65A monitor has six relay
outputs that users can program to open
Maximum Operands
50 per relay
Relay Configuration
The following configuration options are
independent of the relay logic and can be
configured for each relay:
l Latching or non-latching
independent of alarm status
l Normally energized or normally de-
energized
l Normally open and normally closed
via contacts
Relay Specifications
Type
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