EN3800 Multi-channel Online Vibration Monitoring & Protection System

     EN3800 system is an online vibration monitoring and protection device for rotating machinery. Its design is an integration of the best and latest technologies into a product that combines advanced design developments with the best features of those mechanical and electronic instruments already on the market.

     The system combines monitoring and protection with engine set fault diagnosis and offers features that are superior to those of traditional online vibration monitoring instruments. The system is designed to be applicable to the online monitoring and protection of all large and medium sized rotating machinery, including steam turbines, water turbines, compressors, fans, motors and water pumps.

 
Main Technological Specification

Items

Specificians

Input Channels

4, 8, 12 and 16 vibration channel optional, one key-phase channel, three rotational speed channels

Input Signals

Displacement, speed sensor, standard current, voltage signal

Memory Medium

CF card (64M) and U Disk

Record Interval Time

1-60 second

Storage time when record interval is 1 second

4-channel£¾200 hours, 8-channel£¾150 hours, 12-channel£¾120 hours, 16-channel£¾100 hours

Display Resolution

10.4¡åreal color, 640¡Á480 dot matrix

Transduce Output

Vibration channel number £«4, relative relation can be set

Alarm Grade

2 Grades

Alarm Relay Number

4-channel: 8, 8-channel: 12, 12- and 16-channel: 16

Alarm Contact Capacity

0.5A/220V£¬AC

Screen Protection Time

0-499 minutes (no protection when ¡°0¡± is set)

Communication Mode

RS232/RS485-MODBUS¡¢Ethernet

Power Supply

220V£«10£¥AC

Working Environment

0-40¡æ Relative humidity <80£¥

Power dissipation

¨Q45W

External Dimension

288mm¡Á288mm¡Á390mm

Installtion Mode

Card dish pack

Opening Size

200mm¡Á200mm



Classification

 

Standard

Customized

EN3800-01 4-channel
EN3800-02 8-channel
EN3800-03 12-channel
EN3800-04 16-channel

* Client and server computers software, English version.
* Data storage through USB.
* Low speed variable parameter measurement of 4-20mA.
* Over-speed protection (two-out-of-three sensor logic).
* Server data management software.
* Server vibration analysis and fault diagnosis software.
* MODBUS communication, etc.


Main Function

The main graphic display mode of EN3800 is as shown in the right figure. Bar graphs for all the channels (half channels each on the upper and the lower screen segments) will be dynamically displayed on the left side of picture. Each channel will be labeled with its channel name, unit, alarm value, danger value, actual value and data scale.

 

In addition an ¡°OK¡± status light and ¡°Byp¡± (Bypass) status light will be displayed for each channel.

The EN3800 system has many display options, such as main tableau display, vertical trend curve display, horizontal trend curve display, large digit display, bar chart display, waveform and spectrum display, orbit of shaft centerline display, recall display, etc.

 

For bar chart display, digit display and curve display, the channel number displayed in a tableau can be defined; for waveform and spectrum display, the channel number set is, with the option to display waveform or spectrum only, waveform number and analysis high limit of spectrum; for orbit of shaft centerline display, the combination of channel pairs and waveform number.

 

Many other display functions have been added to the EN3800 system, such as real-time calendar, clock display, channel name display, unit display, alarm limit display, signal scale graph display, ¡°OK¡± status display, time coordinate imitating record paper movement display, storage percentage display, alarm indicator, danger indicator and protection indicator display.

 

The operation including screen protection, system clock setup, alarm mode setup, channel parameter setup, data transformation, alarm statistics etc. can be defined in the setup procedure.In the channel parameter setup, the items that can be set are: sensor type and sensivity, high and low limit display, alarm high and low limit, danger high and low limit, with or without speed sensor integration, curve fitting for different expansion measurements, etc. As shown in transducer output, the relationship between output contact and vibration and speed channels can be set.

A 4-20mA transducer output corresponds to the low and high display limit respectively. In alarm and ¡°OK¡± restore delay setup status (Figure 8), the alarm delay time and ¡°OK¡± restore delay time of each channel can be set. In ¡°OK¡± voltage range setup status (Figure 9), the normal voltage range of sensors of each channel can be set.

 

When the input of channel exceeds the normal range, the system will give a ¡°Not OK¡± signal and the channel will exit monitoring to avoid giving a false alarm.

In setup status, the EN3800 provides online hints and help messages for each step.

 

EN3800 provides one or more USB interfaces£¬the data in the internal electronic disk of an EN880C series meter can be transmitted to and stored in a U disk.

The data in a U disk can be stored in the hard disk of a PC or analyzed by the PC.The visible screen can all be copied to form a graph file in a display state or a setting state so as to see the effect of the visible screen and to form various reports.

Generally £¬ENVADA can provide upgrade software through Email or post for the user to modify or add some functions of EN3800.

 

The EN3800 has superb built in instrument functionality based upon a state of the art package including display, memory, data recording, recall and statistics functions. Under some circumstances, an server is needed to support functions and Envada provides data management software and vibration analysis and fault diagnosis software for our customers.

The server computer vibration and fault diagnosis software can manage, analyze and diagnose the vibration data in EN3800 through a LAN composed of EN3800 and a server coupled by Ethernet.

 

The EN3800 input terminals can be connected to numerous different signals, including eddy current sensor signals for measuring rotational speed, key phase, shaft vibration, axial shift, expansion difference, throw, and eccentricity, signals based upon the rotational speed that measure casing vibration, signals from sensors that provide voltage outputs and meet appropriate accuracy requirements, and signals from a Low Voltage Displacement Transducers(LVDT) for measuring casing expansion¡£

 

If a customised function is needed, please inform ENVADA of the requirements before purchase. For the measurement of rotational speed and key-phase, please specify sensor type and the number of teeth.

 

Please contact ENVADA before ordering and ENVADA will provide free technical consultancy as the detailed configuration of the EN3800 depends upon the quantity and nature of measuring points defined by the user.