Measured Values By Each Monitor Type - Omron K6CM User Manual

A-2 Measured Values by Each Monitor
Type
The measurement value, measurement range, and alarm monitoring of K6CM for each monitor type
are shown in the following table.
Monitor type
Vibration & tem-
perature type
Insulation resis-
tance type
Comprehensive
current diagnosis
type
*1. Measuring the magnitude of vibration of things are displacement, velocity, and acceleration. Displacement in-
dicates how far it moved. The velocity shows how fast it moves, and the acceleration shows how fast it has
reached that velocity. In the K6CM-VBM, velocity and acceleration can be measured.
*2. The motor temperature is measured with the sensor head, and the room temperature is measured by the tem-
perature sensor inside the pre-amplifier.
*3. The insulation resistance type has a different measurement method from the insulation resistance meter (in
particular, the voltage applied to the insulation resistance part and the measurement sensor). Therefore, de-
pending on the measurement environment, the insulation resistance value measured with the insulation resis-
tance type may be different from that with the insulation resistance meter.
*4. The leakage current (Io) can be classified into the following two types.
Capacitance leakage current (Ioc) generated through the capacitance between the noise filter or motor and
the ground,
Resistance leakage current (Ior) which causes electric shock and fire, caused by deterioration of wiring and
the device,
The K6CM-IS measures insulation resistance by separating and extracting Ior from measured Io. The rela-
tionship between Ioc and Ior is shown below.
Ioc
The K6CM-ISM monitors alarms according to the insulation resistance value. The measured value of Ior can
also be confirmed, but alarm monitoring cannot be performed. (Ior and insulation resistance are proportional.
Therefore, alarm monitoring is based on insulation resistance.) There is no indication on the front of the
K6CM device for Ioc (leakage current due to capacitance). It can be read out with software tool or EtherNet/IP.
K6CM Motor Condition Monitoring Device User's Manual (N219)
Model Measurement value
K6CM-VB
Acceleration*1
Velocity*1
Motor temperature
Temperature gap (i.e., difference
between motor temperature and
room temperature)*2
K6CM-IS
Insulation resistance*3
leakage current (i.e., Ior, Ioc) *4
K6CM-CI
Degradation level*5
Current
Io
Io: Leakage current
Ior: Leakage current component due to insulation resistance deterioration in Io
Ioc: Leakage current component due to ground capacitance in Io
Ior
Measurement range Alarm monitoring
0.00 to 9.99 G Two levels of warning
failure and critical fail-
0.00 to 45.00 mm/s
ure are available for
0 to 80°C
each measurement
0 to 80°C
value.
0.000 to 1.000 MΩ Two levels of warning
failure and critical fail-
ure are available for
each measurement
value.
0.00 to 200.0 mA Not available.
0 to 999 Two levels of warning
failure and critical fail-
20 to 100% of each CT
ure are available for
rating *6
each measurement
value.
Appendices
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