Bently Nevada 1900/65A Specifications

1900/65A General Purpose Equipment Monitor

Datasheet

Bently Nevada Machinery Condition Monitoring

Description

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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.

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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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1900/65A General Purpose Equipment Monitor Datasheet

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

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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

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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

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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)

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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

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Input Impedance

Non-configurable 10 kΩ

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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

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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

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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

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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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