8842 데이터 시트보기 (PDF) - ASM GmbH

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8842

MEMORY HiCORDER

ASM GmbH 

5

High-Speed Response for Capturing Transient Events

- Function Details -

Large memory capacity allows long-term

recording of high- speed data

In the standard configuration, the 8841 and 8842 can store a

total of 8 mega-words, and with memory expansion 32 mega-

words, using internal solid-state memory. This provides ample

capacity to store data for all 16 channels. The table at right

shows possible recording times, according to the time axis

setting and the number of channels in use. A reduction in the

number of channels prolongs the recording time.

* The table applies to the standard memory configuration. When the optional

MEMORY BOARD 9608 is installed, recording times are extended by a

factor of 4 (from 16 mega-words/channel, 160,000 divisions for 2 channels to

2 mega-words/channel, 20,000 divisions for 16 channels).

■ Memory segmentation function

When using the memory recorder function, the data memory can

be divided into a maximum of 255 blocks. Data can be written

sequentially to the memory blocks, and the waveform in a reference

block and any other block can be superimposed and compared.

* In the standard memory configuration (8 mega-words), the maximum

number of blocks using the 16 channel setting is 127. When the memory

expansion is installed, or when the channel setting is 2 to 8, the maximum

number of blocks is 255.

Recording length using 16 channels

Segmentation into 3 blocks

Segmentation

Segmentation into 127 blocks

A/D

conversion

Input voltage

Insulation

Function outline of memory recorder

Write on memory

Thermal printer

A/D

conversion

Insulation

Input voltage

Input waveform

Sampling period

Time

Output waveform

Time axis

100μs/DIV

200μs/DIV

500μs/DIV

1ms/DIV

2ms/DIV

5ms/DIV

10ms/DIV

20ms/DIV

50ms/DIV

100ms/DIV

200ms/DIV

500ms/DIV

1s/DIV

2s/DIV

5s/DIV

10s/DIV

30s/DIV

1min/DIV

2min/DIV

5min/DIV

Sampling

period

1μs

2μs

5μs

10μs

20μs

50μs

100μs

200μs

500μs

1ms

2ms

5ms

10ms

20ms

50ms

100ms

300ms

0.6s

1.2s

3.0s

2-channel setting

4 MW/channel 40,000 DIV

4s

8s

20 s

40 s

1 m 20 s

3 m 20 s

6 m 40 s

13 m 20 s

33 m 20 s

1 h 6 m 40 s

2 h 13 m 20 s

5 h 33 m 20 s

11 h 6 m 40 s

22 h 13 m 20 s

2 days 7 h 33 m 20 s

4 days 15 h 6 m 40 s

13 days 21 h 20 m

27 days 18 h 40 m

55 days 13 h 20 m

138 days 21 h 20 m

16-channel setting

500 kW/channel 5,000 DIV

0.5 s

1s

2.5 s

5s

10 s

25 s

50 s

1 m 40 s

4 m 10 s

8 m 20 s

16 m 40 s

41 m 40 s

1 h 23 m 20 s

2 h 46 m 40 s

6 h 56 m 40 s

13 h 53 m 20 s

1 day 17 h 40 m

3 days 11 h 20 m

6 days 22 h 40 m

17 days 8 h 40 m

■ Zoom function *In memory recorder function

To make the most of the large-capacity memory, it is possible

to display a compressed waveform simultaneously with a

magnified waveform. Since the 8841 and 8842 are capable

of storing a large amount of data, high-speed sampling is also

possible for waveforms with a long duration. Accordingly,

while observing the compressed image of the entire waveform,

it is also possible to observe the magnified details of desired

parts. Compressed display of a part of the entire waveform is

also possible.

■ Clock input for external sampling *In memory recorder function

The sampling rate for the memory recorder can be controlled by

the timing of an external clock signal. This is useful for example to

collect data synchronized to the running cycle of an engine.

Sampling controlled by external

clock signal

Input waveform

Maximum frequency 500kHz

Sampling period

Time

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