STEVAL-IPE008V1 STMicroelectronics, STEVAL-IPE008V1 Datasheet - Page 50

• Manufacturer Part Number: STEVAL-IPE008V1
• Description: BOARD EVAL STPM01/STR715FR0
• Manufacturer: STMicroelectronics
• Type: Other Power Managementr

Specifications of STEVAL-IPE008V1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, ARM7
• Utilized Ic / Part: STPM01, STR715FR0
• Primary Attributes: 3-Ph Energy Meter (or Single Phase)
• Secondary Attributes: Measures Active, Reactive, Apparent Power
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STPM01, STR715FR0
• Other names: 497-6412; STEVAL-IPE008V1

STPM01 calibration
9
Table 18.
Table 19.
50/60
Line RMS voltage
Line RMS current
Power sensitivity
Shunt sensor
Internal reference voltage
Internal calculation frequency
Amplification of voltage ADC
Amplification of current ADC
Gain of differentiator
Gain of integrator
Gain of decimation filter
RMS voltage register length
RMS current register length
Constant
STPM01 calibration
Energy meters based on STPM01 device are calibrated in a fast and easy way. The
calibration is essentially based on the single calibration of the voltage and current channel
considering their RMS values rather than on the frequency of output pulse signal. When the
two channel are calibrated all the other measurement are calibrated too. This allows the
calibration to be performed in only one point shortening the production time of the meter.
This procedure is possible due to the below key points:
Let’s consider the basic information needed to start the calibration procedure:
Working point settings
The following typical STPM01 parameters and constants are also known:
Device constants
– Device is compound of two independent meter channels for line voltage and current
– Device computes different kind of energies: active, reactive and apparent. The active
– Device produces an energy output pulse signal but information can also be read
– Device has an embedded memory, 56 bits, used for configuration and calibration
respectively. Each channel includes its own digital calibrator, to adjust the RMS in the
range of ±12.5 % in 256 steps, and digital filter, to remove any signal DC component.
All final results are not subject to calibration procedure because they are achieved
from such corrected signals by mathematical modules implemented by hardwired
DSP.
energy is produced without 2nd harmonic of line frequency. It also computes RMS
values of measured voltage and current.
through serial port interface, SPI, and communication channel.
purposes. The value of these bits can be read or they can be changed temporarily or
permanently through SPI communication channel.
Parameter
K
V
I
P
n
n
S
(230V)
(5A)
(LED: P=128000 pulses/kWh, stepper motor: PM=P/64= 2000 pulses/kWh)
0,42 mv/A
Doc ID 10853 Rev 7
G
G
V
G
D
A
B
f
A
B
BG
DIF
INT
UD
M
DF
V
V
I
I
8, 16, 24, 32
0,6135
1.23 V
2
Value
0,815
1.004
23
2
2
2
4
11
16
17
Hz
Tolerance
± 50 ppm
± 2%
± 1%
± 2%
STPM01