8841 查看數據表（PDF） - ASM GmbH

零件编号

产品描述 (功能)

比赛名单

8841

MEMORY HiCORDER

ASM GmbH 

4

- Application -

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.

■ 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.

Rotation frequency

■ 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.

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)

Load shutdown tests in power generation plants and inspection of

electric systems

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. In the field of electricity, the recorders have many applications, such

as recording of rush current frequency, recording of breaker activation timing, and

monitoring of power lines for irregularities.

■ 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.

Memory recorder function

The input signal is converted to digital form and

stored in the internal memory. It can then be

displayed on the screen or printed out on paper.

Since the recordable signal speed is determined by

the sampling rate and the memory saving rate, it is

simple to capture even very fast transient events that

escape normal recorders.

■ CB timing measurement

For inspection of the shutdown timing of circuit

breakers for electrical circuits, the relations

between logic signals and analog waveforms of

multiple points can be analyzed.

close command

Phase R

Phase S

All channel inputs isolated

Each channel has its own dedicated A/D

converter, allowing simultaneous sampling

in all 16 analog channels and in all 16 logic

channels.

■ 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.

Phase T

■ 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.

100 V power line

waveform

RMS recorder function

This function is exclusively for use on 50/60 Hz power-

supply lines and DC. High-speed sampling is applied to

calculate the rms value from the waveform data, and the

result is recorded as a graph.

Chart of Recorder

function

*Using 200 μs high-speed sampling, data for

two waveforms are captured for calculating the

rms value. This process is repeated 20 times

per second, resulting in high-speed response

that is 10 times faster than that of a digital

tester or similar (using a 2-second update rate).

Chart of RMS recorder

function

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