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1900/27 Vibration Monitor
BENTLY
NEVADA
VIBRATION M ONITOR
IN/SEC
MM/SEC
OK ALERT DANGER BYPASS
DISPLAY MOD E
NORMAL
ALERT
LEVEL
DANGER
LEVEL
ALERT
AD
JUST
DANGER
ADJUST
RESET
BUFFERED
TRANSDUCER
1
0 1 2 3 4 5 6
NORMAL
BYPASS
RELAY MODE
ALERT & DANG ER
TIME DELAY
00 3 SECONDS
01 5 SECONDS
10 10 SECOND S
11 15 SECOND S
ALERT RELAY
DRIVE COND ITIONS
00 ALERT
01 ALERT OR
N
OT OK
10 NOT OK
11 DANGER
SELF TEST
0 OFF
1 ON
UNITS
0 ENGLISH 1 METRIC
MADE IN USA
Description
The 1900/27 is a single-channel, stand-alone, locally mounted vibration monitor.
It can be used as a stand-alone machinery protection device, suitable for
general-purpose or some essential machinery and provides a built-in 4-20 mA
interface for trending the monitored parameter in plant control and automation
systems. The 1900/27 accepts a single transducer input from compatible
Trendmaster® 2000 accelerometers, conditions the signal into peak velocity
units, and provides local display and status indication as well as alarm relay
contact outputs for connection to an external annunciator.
By using an optional Rack Buffered Output Transducer Interface Module (TIM),
the 1900/27 can also be used in conjunction with our Trendmaster 2000 system.
It allows the user to apply machinery protection capabilities to all (or selected)
seismic vibration points of the Trendmaster 2000 system.
Note: If your application calls for connectivity to Bently Nevada’s Trendmaster 2000 system, but
does not require a 4-20 mA interface to other systems, consider the use of our 1900/25 monitor
instead (consult part number 141485-01 for details).
Caution
If housing measurements are being made for overall protection of the machine,
thought should be given to the usefulness of the measurement for each
application. Most common machine malfunctions (imbalance, misalignment, etc.)
originate at the rotor and cause an increase (or at least a change) in rotor
vibration. In order for any housing measurement alone to be effective for overall
machine protection, a significant amount of rotor vibration must be faithfully
transmitted to the bearing housing or machine casing, or more specifically, to
the mounting location of the transducer.
In addition, care should be exercised in the physical installation of the
transducer. Improper installation can result in a decrease of the transducer
amplitude and frequency response and/or the generation of signals, which do
not represent actual machine vibration.
Upon request, we can provide engineering services to determine the
appropriateness of housing measurements for the machine in question and/or
to provide installation assistance..
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 1 of 7
Page 2
Specifications
Inputs
Compatible
transducers
Bently Nevada 200150 and
190520 Accelerometers.
Input Sensitivity
100 mv/g
Maximum
acceleration
20 g peak
Maximum
differential
input voltage
4 volts peak to peak
Power
AC/HDC Power
Version
AC Voltage:
85 to 264 Vac
DC Voltage:
110 to 370 Vdc
Current Draw:
60 mA. typ.
120 mA max.
Frequency:
47 Hz to 440 Hz, or DC.
Inrush:
20A typ. @ Vin=100Vac
40A typ. @ Vin=200Vac
+24 Vdc Power
Version
Signal Conditioning
Monitor Full-scale:
(Below 614Hz)
English Units:
2.0 in/s zero-to-peak
Metric Units:
50.8 mm/s zero-to-peak
Note: Full scale is limited by maximum input above 614 Hz. The
maximum input is 2 volts peak, or 20 g peak. 20 g at 614 Hz is
equivalent to 2 inch per second (the full scale range of the
monitor). For frequencies above 614 Hz, Full scale is equal to
(1228/frequency).
Frequency
Response:
High pass corner
frequency
-3 dB corner @ 8 Hz less than 1%
error due to high pass corner
above 30 Hz
Low pass corner
Greater than 4 kHz
less than 1% error due to low
pass corner below 4kHz
Accuracy
Liquid Crystal
Display and
Buffered output.
30 Hz – 4 kHz:
±3% of full scale, Maximum
8 Hz – 30 Hz
-30% , + 3% of full scale
4-20 mA Recorder.
30 Hz – 4 kHz:
±5% of full scale, Maximum
8 Hz – 30 Hz
Voltage:
Current Draw:
18 to 36 Vdc
300 mA max.
-30% , + 5% of full scale
Outputs
Buffered Transducer Output
Output Sensitivity:
19.7 mV/mm/s (500 mV/in/s)
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 2 of 7
Page 3
Output Impedance:
Full-scale Range:
4-20 mA Output
Full-scale Range:
Overrange:
Accuracy:
Galvanic Isolation:
Relays
Type
Contact Ratings
Switched
Power:
Maximum
Voltage and
Current
Dielectric
Strength
(at sea level):
Life Expectancy
Electrical:
Displays
Liquid Crystal
Display
500 Ω
50.8 mm/s (2 in/s) zero-to-peak
20 mA @
50.8 mm/s (2 in/s)
63.5 mm/s (2.5 in/s)
Adjusted with trimpot
Optical @ 1000 Vac or 707 Vdc
Single-pole, double-throw.
180 watts, 1800 VA Maximum
300 Vac at 6 A
28 Vdc at 6 A
Contact to Contact: 750 Vrms
Contact to Coil: 1500 Vrms
180,000 operations at 6 A, 120
Vac
Size:
50.8 mm wide x 22.8 mm high
(2.0 inches wide x 0.9 inches high)
Full-scale:
50.8 mm/s (1.999 in/s)
Refresh Rate:
0.8 s
LED Indicators
OK:
One constant ON green LED
indicates OK condition of monitor,
transducers, and field wiring.
Constant OFF indicates NOT OK
condition. OK LED flashing at 2 Hz
indicates monitor has been NOT
OK, but is now OK.
Alert:
One yellow LED indicates an Alert
condition. Flashing at 2 Hz
indicates an Alert condition has
occurred and gone away. (Only
occurs when the Alert relay is
configured as nonlatching.)
Danger:
One of the two red LEDs indicates
a Danger condition. Flashing at 2
Hz indicates a Danger condition
has occurred and gone away.
(Only occurs when the Danger
relay is configured as
nonlatching.)
BYPASS:
The other red LED indicates the
monitor is in BYPASS mode.
Controls
Display Mode
Switch:
Three positions: Normal, Alert
Setpoint, and Danger Setpoint.
Controls what is shown on the
LCD display.
Relay Mode
Switch:
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 3 of 7
Page 4
Two positions; controls whether
monitor is in normal or BYPASS
mode.
Reset Button:
Push to reset latching relays and
flashing LEDs.
Configuration
Switch
Used to set Alert and Danger Time
Delay, Alert relay drive conditions,
display units, and to initiate a
monitor self-test.
Environmental Limits
Operating
Temperature:
-20°C to +70°C (-4°F to +158°F)
Storage
Temperature:
-30°C to +90°C (-22°F to +194°F)
Relative
Humidity:
Field-programmable Options
These options are either field-changeable or
programmed via internal jumpers. Bold text
indicates options as shipped from the factory.
Alarm Time Delay Option:
3 seconds
5 seconds
10 seconds
15 seconds
Alert Relay Configuration Option:
Alert relay
Alert or NOT OK relay
NOT OK relay
Danger relay
Units Option:
English
Metric
To 95%, non-condensing
Hazardous Area Approvals
CSA/NRTL/C:
Class1, Division 2, Groups A, B, C,
D T4 @ Ta=70 °C
Physical
Dimensions
Height x Width
x Depth:
132 mm x 132 mm x 71.1 mm
(5.20 in x 5.20 in x 2.80 in)
Weight
400 g (0.85 lb).
Ordering Information
1900/27-AXX
A: Power Supply Option
0 1 85 - 264 Vac, 110 – 370 DC
0 3 +24 Vdc
Monitor Self-test Option:
Off
On
Relay Mode Option:
Normal
BYPASS
Normal Relay State Option:
Normally de-energized
Normally energized
Relay Reset Option:
Latching
Nonlatching
4-20 mA Output Behavior Option:
The 4-20 mA output can be set to
clamp to 2 mA when the monitor
is placed in BYPASS.
BYPASS 2 mA clamp enabled
BYPASS 2 mA clamp disabled
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 4 of 7
Page 5
Accessories
200150 Accelerometer
200150-AXX
See Specification and Ordering Information sheet for
transducer ordering information.
200152 Transducer Cable
200152 - AXX
A: Cable length option in metres.
1 5 15 ±0.15 metre (49.2 ±0.5 feet)
190100-01
Weatherproof enclosure for one
1900/27 Vibration Monitor.
When properly installed, the
weatherproof enclosure will meet
NEMA 4X watertight
specifications.
Manual
190127-01
1900/27 Vibration Monitor
operation and maintenance.
Rack Buffered Output Transducer Interface
Module (TIM)
The 1900/27 Vibration Monitoring System can be
used with our Trendmaster cost-effective,
automated data collection and diagnostics system,
via the Rack Buffered Output Transducer Interface
Module (TIM).
Two connectors required for cable (line) connections
are included with the TIM. The signal-input connector
is a two-wire terminal strip. The signal input cable
must be provided by user or ordered separately.
101281-01
Rack Buffered Output TIM
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 5 of 7
Page 6
NORMAL
ALERT
LEVEL
DANGER
LEVEL
1
0
1 2 3 4 5 6
NORMAL
BYPASS
RELAY MOD E
ALERT & DANG ER
TIME DELAY
00 3 SECONDS
01 5 SECONDS
10 10 SECOND S
11 15
SECONDS
ALERT RELAY
DRIVE CONDITI ONS
00 ALERT
01 ALERT OR
NOT OK
10 NOT OK
11 DANGER
SELF TEST
0 OFF
1 ON
UNITS
0 ENGLISH
1 METRIC
MADE IN USA
MADE IN USA
Graphs and Figures
BENTLY
NEVADA
VIBRATION MONITOR
OK
DISPLAY MODE
BUFFERED
TRANSDUCER
ALERT
119.4
(4.700)
DANGER
ALERT
ADJUST
DANGER
ADJUST
BYPASS
IN/SEC
MM/SEC
RESET
119.4
(4.700)
4.064
(0.1600)
4 pl.
Dia.
(2.802)
71.1
BENTLY
NEVADA
27.9
(1.100)
132.1
(5.200)
Figure 1: Typical field wiring diagram for the 1900/27 Vibration Monitoring System
59.7
(2.350)
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 6 of 7
Page 7
Figure 2: 1900/27 Weatherproof Enclosure Dimensions Diagram
Dimensions are in millimetres (inches)
Copyright 1999. Bently Nevada LLC.
1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 775.782.3611 Fax: 775.215.2873
www.ge-energy.com/bently
All rights reserved.
Bently Nevada and Trendmaster are trademarks of General Electric Company.
Specifications and Ordering Information
Part Number 141486-01
Rev. D (04/07)
Page 7 of 7
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