71M6521DE-IMR/F Maxim Integrated Products, 71M6521DE-IMR/F Datasheet - Page 88
71M6521DE-IMR/F
Manufacturer Part Number
71M6521DE-IMR/F
Description
IC ENERGY METER 16K FLASH 68-QFN
Manufacturer
Maxim Integrated Products
Datasheet
1.71M6521DE-IMRF.pdf
(107 pages)
Specifications of 71M6521DE-IMR/F
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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The table below lists the parameters that are typically entered to effect calibration of meter accuracy.
The table below shows CE parameters used for suppression of noise due to scaling and truncation effects.
Page: 88 of 107
Address
Address
0x0C
0x0D
0x0A
0x0B
0x1B
0x08
0x09
0x13
0x18
0x15
0x16
CE
CE
QUANT_VARA
QUANT_VARB
PHADJ_A
PHADJ_B
CAL_VA
CAL_VB
QUANT_I
CAL_IA
CAL_IB
QUANTA
QUANTB
Name
Name
Default
16384
16384
16384
16384
Default
0
0
0
0
0
0
0
CE Calibration Parameters
Description
These constants control the gain of their respective channels. The nominal
value for each parameters is 2
proportional to its CAL parameter. Thus, if the gain of a channel is 1% slow,
CAL should be scaled by 1/(1 – 0.01).
These two constants control the CT phase compensation. No compensation
occurs when PHADJ_X = 0. As PHADJ_X is increased, more compensation
(lag) is introduced. Range: ±2
angle Φ:
PHADJ
PHADJ
Other CE Parameters
Description
This parameter is added to the Watt calculation for element 0 to compensate
for input noise and truncation.
LSB = (VMAX*IMAX / In_8) *7.4162*10
This parameter is added to the Watt calculation for element 1 to compensate
for input noise and truncation. Same LSB as QUANTA.
This parameter is added to the VAR calculation for element A to compensate
for input noise and truncation.
LSB = (VMAX*IMAX / In_8) * 7.4162*10
This parameter is added to the VAR calculation for element B to compensate
for input noise and truncation. Same LSB as for QUANT_VARA.
This parameter is added to compensate for input noise and truncation in the
squaring calculations for I
LSB = (IMAX
_
_
X
X
=
=
2
/In_8
2
2
20
20
. 0
2
. 0
)*7.4162*10
1241
1487
. 0
. 0
02229
−
0155
2
−
. QUANT_I affects only I0SQSUM and I1SQSUM.
. 0
. 0
009695
15
14
0131
⋅
TAN
-10
– 1. If it is desired to delay the current by the
⋅
= 16384. The gain of each channel is directly
TAN
A
⋅
2
Φ
⋅
71M6521DE/DH/FE Data Sheet
TAN
TAN
Φ
-10
-10
Φ
W
Φ
W
at 60Hz
at 50Hz
Rev 2
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