Data Sheet

3
- Application -
■ Load shutdown test
Analysis of the relationship between the generator
voltage, rotation speed regulation, governor servo
operation condition, and the open and close timing
of the pressure regulator before and after load
shutdown can be performed.
FFT analysis function
FFT capability includes single-signal FFT for analyzing frequency
components, two-signal FFT for transfer function analysis, and octave analysis
for acoustic analysis. The source signal can be selected from waveform data
captured by the memory recorder, and isolating required sections is also
possible. (Number of data points: 1000 - 10000)
Vibration analysis
When installing rotating machinery, such as agitators, that create many
vibrations, damping precautions are normally taken to ensure that the
vibrations are not propagated directly to the floor surface. Analysis of the
vibration damping measures and effects can be conducted by measuring
the natural frequency and the transfer function.
■ Ground fault line detection
To identify the ground fault line of transmission lines, measurement can
be conducted using the trigger that combines a leak current meter and the
recorder. This allows observation and recording of the waveform before and
after ground faulting to identify the line.
Load shutdown tests in power generation plants
For load shutdown tests in power generation plants, the pre-
trigger function can be used to measure and record waveforms
before and after the test, enabling accurate analysis. The vernier
function, which can be used to perform fine adjustment of
amplitudes, is also a useful tool.
■ Momentary loss of power
recording
Momentary loss of power in power-supply
circuits can be recorded by using the voltage drop
detection trigger, thus enabling accurate waveform
recording of unexpected events.
■ Recording of motor rush current
The rush current occurring when the power to a motor
or a relay is turned on can be accurately measured as a
waveform.
Research and development of
automobiles
In vehicle and engine running tests,
the relationship among various
parameters must be examined.
Multi-channel recorders are necessary to
accomplish this.
Plant maintenance
In plants, memory recorders are used to measure and
record the operation of solenoid and control valves.
Since the MEMORY HiCORDER 8826
can simultaneously create X-Y plots, the
relationship between flow and valve lift
can also be observed.
■ Analysis of engine characteristics
The pressure waveforms of injection pipes and fuel-
injection pumps, etc., can be recorded and stored in
the internal memory and then superimposed on a
reference waveform for analysis.
■ Measurement of the damping of vibrations
reaching the solid base from the rotating
machinery
By striking the agitator with an impulse hammer, the
vibrations propagated to the solid base can be measured by
the acceleration speed pick up. Finding the transfer function
can show to what extent specific frequencies are being
dampened.
■ Measurement of the natural frequency of
objects
Resonance phenomena can be avoided by ensuring that the natural
frequency of an object is different from the vibration frequency of
the surroundings. By striking the object with an impulse hammer
and finding the transfer function, the natural frequency of the
object can be found.
Rotation frequency