Vibro Meter Vibration Monitor Vibration Sensor

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Vibro Meter Vibration Monitor Vibration Sensorcharacteristic

• Absolute vibration measurement

• Monitoring of machines and industrial equipment

• Suitable for speed sensors (CV...) and piezoelectric accelerometers (CA.../CE...)

• Can use longer sensor connection cables

• 115/230 volts AC or 24 volts DC or 48 volts DC

• Aluminum or steel plate casing or 19 inch European style board

• Dual channel version is optional

• LCD display screen, protection level IP66

Vibro Meter Vibration Monitor Vibration SensorOverview

VMS 830 is a compact vibration monitoring device used to control independent machines as well as auxiliary units such as fans, pumps, centrifuges, mills, gears, etc; Its normal operation is crucial for important factory equipment or process boundaries. Among other functions, it allows monitoring according to DIN 45665 and DIN ISO 10816 standards.

For this purpose, it utilizes the vibration of important machine components (bearing seat, foundation, housing), which is converted into electrical signals by sturdy and durable accelerometers (piezoelectric accelerometers) or speed sensors with integrated electronic components. When using GSI type isolation units in the measurement circuit, the potential difference (up to 4kVeff) between the front end and the vibration monitor will not have an impact. In this case, the accelerometer (with integrated electronic components) needs to provide a current modulated (µ A/g) output signal (VIBRO-METER). This method allows for a wide range of signal amplitudes and frequencies, as well as signal cables up to 1000 meters in length. For front-end circuit control, the vibration monitor is equipped with a so-called OK system, which is applicable to all mentioned front-end devices.

In explosion-proof areas (starting from Zone 1), use PTB certified accelerometers and speed sensors with isolation units or pressure sealed enclosures as the front end. This vibration monitoring device is also suitable for controlling machines.

In order to evaluate the machine status, the vibration monitor can choose to consider the velocity value after specific machine filtering (high/low-pass combination), or the displacement value after simple integration. A DC signal proportional to the magnitude of vibration can be output as current or voltage.

Two independently adjustable set point switches with optional response delay, capable of issuing "warning" and "alarm" signals through corresponding assigned relay dry contacts (fail safe function).

For on-site installation, the complete signal and evaluation electronic equipment is installed together with the power unit in a steel plate (protection level IP66) or aluminum casing (protection level IP65). The dual channel unit can be installed in a shared housing.

Functional Description

The signal from the velocity sensor CV 2 (mV/mm/s) or the piezoelectric accelerometer CE (mV/g) is converted into a standardized voltage signal (velocity 70.7 mV/mm/s RMS) in the preamplifier. Subsequently, it passes through a high pass/low-pass filter and is amplified in a two-stage broadband amplifier to the level required to adjust the electronic device. The normalized acceleration signal is adjusted in a bandpass (high/low-pass combination) according to the frequency range requirements of a specific machine. Determine which of the two possible units to use for vibration monitoring - velocity or displacement - through the DIL switch.

The DC output signal (voltage or current) obtained after subsequent rectification (true RMS rectifier) is calibrated in RMS units. The DC output signal is applied to two adjustable level detectors. The response delay of the corresponding distribution relay is set to 1, 3, 5, or 10 seconds through the DIL switch. The switching contacts of the distribution relay can activate alarm and trip circuits, responding to the opening or closing of the contacts. The constant excitation or constant non excitation can be selected through the Dil switch.

Technical Information

Select measurement range through DIP switch
Speed 10, 20, 50 mm/s effective value or displacement 100, 200, 500 μ m peak to peak value

DC output 0 .. +10V, Load resistance R>10 k Ω or 0/4.20mA, load resistance R<500 ohms

External device power supply+24V DC tolerance ± 1%; Maximum 125 mA; Maximum noise level of 50 mVpp

Two set point switches, independently adjustable, with a range of 10-100% (1V to 10V DC)

Time delay is selected through DIP switch; 1, 3, 5, or 10 seconds

Relay contact maximum switch voltage 220 V DC or 250 VAC maximum switch current 2 A maximum 60W or 125 VA

Version: Aluminum casing

Temperature range: -20 +70 ° C working temperature -30 ° C ..+80 ° C storage temperature
Maximum humidity of 95%, no condensation
Shell pressure cast aluminum, material GD AL SI 12
Size: Single channel 120 x 220 x 91 millimeters (height x width x depth)
Dual channel 230 x 280 x 110 millimeters (height x width x depth)
Color RAL 7001
Protection level IP65
Connecting threaded cable joint M16x1.5 polyamide
3 channels per channel
2 x 3 dual channels
Weight per channel 2 kilograms
Dual channel 4kg

Version: European board

Temperature range 0 +50 ° C working temperature -20 ° C ..+80 ° C storage temperature
Format European style board
Size 160 x 100mm
Width 8 TE (40mm) front panel
Height 3 HE
Connect plug connector 32 pin DIN 41612 D-type
Weight approximately 0.45 kilograms

Version: Steel plate casing with LCD display screen

Temperature range 0 +50 ° C working temperature 0 ..+50 ° C storage temperature
Maximum humidity of 95%, no condensation

Shell steel plate, powder coated
Size single channel 150 x 300 x 128 millimeters (width x height x depth)
Dual channel 300 x 300 x 128 millimeters (width x height x depth)
Color RAL 7035
Protection level IP 66
Material thickness shell: 1.38 millimeters; Door: 1.25 millimeters
Technical design of the shell with hinged doors; Lock with 3mm double toothed key
Connecting threaded cable joint M16x1.5 polyamide
3 channels per channel
2 x 3 dual channels
Weight per channel 3.5 kilograms
Dual channel 6.0 kg

VMD-VMS830

VMD-VMS830-2 （Used for dual channel instruments）

VMD-VMS830-A04-B01-C100-D10-E1000-F20-G4-H230-I0-J1
(VMS 830-2 for dual channel instruments)