78M6612 Data Sheet
DS_6612_001
4.4.7.5 CE Calibration Parameters
The table below lists the parameters that are typically entered to effect calibration of measurement
accuracy.
CE
Address
Name
Default Description
0x08
CAL_IA
CAL_IB
CAL_VA
CAL_VB
16384
16384
16384
16384
These constants control the gain of their respective channels.
The nominal value for each parameters is 214 = 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 scaled by 1/(1 – 0.01).
0x09
0x0A
0x0B
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:
±215 – 1. If it is desired to delay the current by the angle Φ:
PHADJ_A
PHADJ_B
0x0C
0x0D
0
0
0.02229⋅TANΦ
0.1487 − 0.0131⋅TANΦ
0.0155⋅TANΦ
PHADJ _ X = 220
at 60 Hz
PHADJ _ X = 220
at 50 Hz
0.1241− 0.009695⋅TANΦ
4.4.7.6 Other CE Parameters
The table below shows CE parameters used for suppression of noise due to scaling and truncation
effects.
CE
Address
Name
Default
Description
This parameter is added to the Watt calculation for element 1
to compensate for input noise and truncation.
LSB = VMAX * IMAX * 1.8541*10-10 W
0x12
QUANTA
0
This parameter is added to the Watt calculation for element 2
to compensate for input noise and truncation. Same LSB as
QUANTA.
0x13
0x14
0x15
QUANTB
0
0
0
This parameter is added to the VAR calculation for element 1
to compensate for input noise and truncation.
LSB = VMAX * IMAX * 1.8541*10-10 W
QUANT_VARA
QUANT_VARB
This parameter is added to the VAR calculation for element 2
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 I2. QUANT_IA
affects only I1SQSUM.
LSB = IMAX2 * 4.6351 * 10-11 A2
QUANT_IA
QUANT_IB
0x16
0x17
0
0
This parameter is added to compensate for input noise and
truncation in the squaring calculations for I2. QUANT_IB
affects only I2SQSUM.
Same LSB as for QUANT_IA.
88
Rev. 1.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
