参数资料
型号: 71M6542G-IGTR/F
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP100
封装: LEAD FREE, LQFP-100
文件页数: 41/165页
文件大小: 2208K
代理商: 71M6542G-IGTR/F
v1.1
2008–2011 Teridian Semiconductor Corporation
135
5.3.11 CE Calibration Parameters
Table 92 lists the parameters that are typically entered to effect calibration of meter accuracy.
Table 92: CE Calibration Parameters
CE
Address
Name
Default
Description
0x10
CAL_IA
16384
These constants control the gain of their respective channels. The
nominal value for each parameter is 2
14 = 16384. The gain of each
channel is directly proportional to its CAL parameter. Thus, if the
gain of a channel is 1% slow, CAL should be increased by 1%.
Refer to the 71M6541 Demo Board User’s Manual for the equations
to calculate these calibration parameters.
71M6542 only.
0x11
CAL_VA
16384
0x13
CAL_IB
16384
0x14
CAL_VB
16384
0x12
PHADJ_A
0
These constants control the CT phase compensation. Compensation
does not occur when PHADJ_X = 0. As PHADJ_X is increased,
more compensation (lag) is introduced. The range is
± 215 – 1. If
it is desired to delay the current by the angle
Φ, the equations are:
Φ
Φ
=
TAN
X
PHADJ
0131
.
0
1487
.
0
02229
.
0
2
_
20
at 60Hz
Φ
Φ
=
TAN
X
PHADJ
009695
.
0
1241
.
0
0155
.
0
2
_
20
at 50Hz
0x15
PHADJ_B
0
0x12
DLYADJ_A
0
The shunt delay compensation is obtained using the equation
provided below:
(
)
+
+
+
=
s
rees
f
c
b
f
ab
f
a
X
DLYADJ
π
2
sin
2
cos
2
cos
360
2
1
.
0
1
_
2
14
deg
where:
A
a
2
=
1
2
+
= A
b
=22+42+2
Where, f is the mains frequency and fs is the sampling frequency.
The table below provides the value of A for each current channel:
Channel
Value of A
(decimal)
Eq. 0 or 2
Eq. 1
DLYADJ_A
15811 / 2
14
6811 / 2
14
DLYADJ_B
-1384 / 2
14
-1384 / 2
14
0x15
DLYADJ_B
0
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