Technology will not be liable for damage, etc. due to methods of use contravening to the instructions provided
here.
■ Safe use
WARNING
Make sure to ground.
May cause electric shock or malfunction.
Make sure to turn the power off before any wiring work.
Will cause electric shock.
CAUTION
Connect the input signal within the voltage range described in the
specification to the input terminals.
Will cause damage and malfunction of the instrument.
Install the monitor unit and its relay module unit in the same location in the
instrument rack.
Will cause damage to the instrument and malfunction of the turbine monitoring system.
A printed circuit board and electronic products may receive damage with
the static electricity of a human body.
Touch the metal part once and discharge your static electricity before
dealing with it.
Will cause damage and malfunction of the instrument.
Do not touch parts and soldered surfaces of the monitor unit.
Will cause damage and malfunction of the instrument.
The monitor unit is a precision instrument.
Take care not to expose it to excessive shock or vibration.
Do not change the parameter settings during operation.
May cause unexpected alarm output.
Do not pull out the face plate during operation.
Will cause damage to the instrument and malfunction of the turbine monitoring system.
Do not measure insulation resistance and dielectric strength other than
those at places specified.
Will cause damage to the instrument.
Do not remodel this monitor unit without permission.
Otherwise the guarantee can not be made.
■ EMC(Electro-magnetic compatibility)
The EMC of each VM-5 Series monitor is evaluated by various noise tests.
However, its characteristics may vary with on environmental conditions such as the magnitude of noise,
ambient temperature, humidity and the arrangement of equipment.
For the above reason, when operating the monitor, please observe the following CAUTION.
CAUTION
The monitor unit should be operated by specialists or personnel who have
knowledge of it.
When a shielded cable is used, the length of the unshielded cable section
should be less than 100mm (3.937in REF.).
For each relay used near this monitor unit, devices related to this monitor
unit or signal cables connecting the monitor unit and these devices, install
a surge killer.
Firmly tighten each screw used for mounting each unit. In additional,
always close the face plate for the monitor unit, then fix it with knurled
screws.
In order to prevent the system from its malfunction when the monitor unit
fails, provide the systematic interlock function.
Do not wire input signal cables in parallel with control and power cables.
It is recommended that separated wire ducts be used for these cables.
Do not use any radio equipment near the monitor unit.
■ Noise filter
Noise transmitted through in each cable may be rejected to some extent by inserting a ferrite core in the cable
(note 1).
If the cable passes through noisy surroundings, it is recommended that such a noise prevention device is used.
GENERAL INFORMATION
OVERVIEW
This is a highly reliable dual channel vibration monitor which monitors the shaft vibration of
rotating machinery.
Both a 10-slot rack mounting type and a single-unit independent type with a built-in power supply
are available so that it can respond flexibly to any system design from medium and small scale
rotating machinery to TSI. The monitor accepts signals detected by a transducer and displays them
on LCD.
It is also possible to set ALERT and DANGER alarm levels independently to detect machine
failures early on and inform the operator of these failures. It has a built-in self-diagnostic function
to inform the operator of input transducer failures, thereby preventing rotating machinery from
false shutdowns.
FEATURES
• Conforms to API St’d 670
• The monitor is available as a single unit independent type or a rack mounting type.
• Has a self-diagnostic function.
• Allows the operator to change each setting even in the field.
• Important information such as measured value, alarm set value and gap voltage is normally
displayed.
• Can isolate recorder output (option).
• LED display / contact output (DANGER / ALERT alarm).
• LED display / contact output (Input abnormal alarm).
• For alarm output wiring proceed as described in the instruction manuals for the
VM-5G Single Unit Instrument Rack and VM-5Y Relay Module Unit used in
combination with this monitor unit.
• If megger test is made on the signal cable between transducer and monitor,
disconnect the cable from transducer and monitor.
Be sure to discharge the charged electric load before connecting the cable to the
transducer and monitor.
If this caution is not adhered to, the transducer and monitor could be damaged.