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參數(shù)資料
| 型號： | SA9109B |
| 廠商： | SAMES |
| 元件分類： | 電能質量分析儀 |
| 英文描述： | MONOCHIP SINGLE PHASE BIDIRECTIONAL KILOWATT HOUR METERING IC |
| 中文描述： | MONOCHIP單相雙向千瓦小時計量IC |
| 文件頁數(shù)： | 9/18頁 |
| 文件大?。?/td> | 183K |
| 代理商： | SA9109B |
SA9109B
sames
9/18
The kWh values of the LCD display digits, are given in the table below. The
resolution of the Least Significant Digit is normally programmed to 0.1kWh:
10
5
10
4
10
3
10
2
10
1
10
0
10
-1
kWh
4.
Device Programming
The SA9109B contains on-chip registers which enables the meter manufacturer to
store various data:
Slope Adjustment
The slope of the device may be adjusted by programming a slope constant (K
) into
the device during calibration. The output frequency at SDO (f
P
) is calculated by
means of the following formula:
f
P
= 11.16 *
*
3.5795MHz I
R
Where
FOSC
= Oscillator frequency (2MHz ...... 4MHz)
I
I
= Input current for current sensor input (16μA at rated line current)
I
V
= Input current for voltage sensor input (14μA at rated line voltage)
I
R
= Reference current (typically 50μA)
K
S
= Slope constant (1025 ... 16384))
(The default value is 11389)
FOSC
I
I
.I
V
* 40062.5
2
K
S
By changing the slope of the device the resolution of the LCD, together with the
pulse rate on SDO may be changed by up to an order. The block diagram below
illustrates the display update rate.
Programmable slope divider
* At rated conditions
The display is incremented after every 64th pulse on SDO.
40062.5*
Pulses / s
D R -01256
1 / K
s
Display
Increm ent
1 / 64
f
p
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| SA9109BFA | 制造商:SAMES 制造商全稱:SAMES 功能描述:MONOCHIP SINGLE PHASE BIDIRECTIONAL KILOWATT HOUR METERING IC |
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