16-8
IM 253421-01E
16.12 External Contorol and Input Signals (in
combination with the D/A converter and
comparator options)
Item
Specification
External Control and Input/Output signals
EXT-HOLD, EXT-TRIG, EXT-START, EXT-STOP, EXT-RESET, INTEG-BUSY
(However, the /DA4 option must be installed. Only EXT-HOLD and EXT-TRIG are available if the /
CMP option is installed.)
Input level
TTL negative pulse
16.13 Total Harmonic Analysis Function (optional)
Item
Specification
Method:
synchronization to the fundamental frequency by using a phase locked loop (PLL) circuit
Frequency range:
Fundamental frequency between 40 Hz and 440 Hz
Maximum reading:
9999
Items to be analyzed:
V, A, W, deg
Each harmonic components, Total Vrms, Total Arms, Total effective power, PF of the fundamental,
Phase-angle of fundamental, For each harmonic phase-angle related to the fundamental, Total
harmonic distortion ratio in %, and contents ratio in %.
However, a simultaneous analysis can be made for a specified input module.
Sampling speed/method:
The sampling speed depends on the fundamental frequency to be input:
Input frequency range
Sampling frequency
Window up to the n’th harmonic
Order
40
≤
f<70 Hz
f
×
512 Hz
1 period of f
50
70
≤
f<130 Hz
f
×
256 Hz
2 period of f
50
130
≤
f<250 Hz
f
×
128 Hz
4 period of f
50
250
≤
f<440 Hz
f
×
64 Hz
8 period of f
30
FFT number of points :
512 points FFT
FFT calculation accuracy:
32 bits
Window:
Rectangular window
Display update interval:
Approx. 3 s
Accuracy:
±
0.2% of range is added to the normal display accuracy.
