Hioki 8841 - Auxiliary Functions

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18.9 Au xiliary Functions
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Computation functions
(MEM)
1. Waveform processing calculations (MEM)
Arithmetic operations, absolute value, exponents, common logarithms,
square roots, moving average, 1st and 2nd derivatives, 1st and 2nd integrals,
parallel displacement on time axis, trigonometric functions, reverse
trigonometric functions
16 arbitrary operational equations: Calculations are possible up to a
recording length that corresponds to one fourth of the memory capacity.
2. Waveform parameter calculations (MEM)
Average value, RMS value, peak-to-peak value, maximum value, time to
maximum value, minimum value, time to minimum value, period,
frequency, rise time, fall time, area value, XY area value, standard deviation
（
parameter calculation result can be saved on floppy disk, MO disk, and so
on.)
3. Averaging function
Additive average, exponential average (2, 4, 8 to 256 samples) (MEM)
Simple average, exponential average , peakhold (2, 4, 8 to 4096 samples)
(FFT)
Memory segmentation
Memory can be segmented among channels.
Number of segments: Maximum 255
Batch saving of all blocks can be selected.
Sequential saving
(MEM, REC&MEM)
Input signal capture is carried out continuously using the trigger, storing
waveform data successively in each block.
Displaying waveform ON or OFF can be selected.
Multi-block
(MEM)
Recording the waveform data in an arbitrary block.
Displaying two arbitrary blocks in duplicate.
Waveform evaluation
1. Waveform area evaluation (MEM, FFT):
Waveform evaluation based on evaluation area for Y-T waveform, X-Y
waveform, or FFT*
1
results
Evaluation modes:
Out: fail if any part of waveform is outside evaluation area
All out: fail if whole of waveform is outside evaluation area
Stop modes:
GO (pass) stop, NG (fail) stop, GO & NG stop
Printer output or waveform save at stop
Decision time: Approx. 20 ms max
Decision period: Approx. 150 ms (MEM) With input 1 Vp-p sin wave, 1
kHz, to 1 channel, used channel ch1 to 4, 100
μ
s/DIV
×
1, 25DIV
（
depend
on time-axis compression, recording length)
Approx. 490 ms (FFT)
1000 points, linear spectrum, window function - rectangular
（
depend on
frequency-axis, FFT analysis type, FFT points)
Graphics editor (Provided, used for defining an arbitrary evaluation area for
waveform evaluations): Line, paint, storage, erase, parallel, reverse, clear, all
clr, undo, save, end
2. Waveform parameter evaluation (MEM)
Decision based on setting minimum and maximum values for waveform
parameter calculation results.
3. Decision output (REC, FFT)
GO and NG outputs on right side panel: open collector outputs (with 5 V
output, active low, pulse width 70 ms min.)
18.9 Auxiliary Functions