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參數(shù)資料
| 型號： | 90E32ERGI |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封裝： | TQFP-48 |
| 文件頁數(shù)： | 21/67頁 |
| 文件大?。?/td> | 777K |
| 代理商： | 90E32ERGI |
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90E32
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Calibration Method
28
August 24, 2011
5
CALIBRATION METHOD
5.1
NORMAL MODE OPERATION CALIBRATION
Calibration is done per phase and there is no need to calibrate for the
all-phase-sum (total) parameters. The calibration method is as follows:
Step-1: Register configuration for calibration
-
Start to configure the System configuration Registers by writing
5678H to the ConfigStart register.
-
The 90E32 automatically reset the configuration registers to their
default value.
-
Program all the system configuration registers.
-
Calculate and write the checksum to the CS0 register.
-
Write 8765H to the ConfigStart register (enable checksum check-
ing).
-
System may check the WarnOut pin to see if there is a checksum
error.
The start register and checksum handling scheme is the same
throughout the calibration process, so the following section does not
describe the start and checksum operation.
Step-2: Measurement calibration (per-phase)
-
First calibrate offset at I = 0, U = 0 for current or/and voltage;
Configure calculated channel Gain (The user needs to program
the PGA gain and DPGA gain properly in order to get the calcu-
lated gain within 0 to 2 in step-1).
Read Irms/ Urms value.
Calculate the compensation value.
Write the calculated value to the offset register.
-
Then calibrate gain at I = In (Ib), U = Un for current and voltage;
Read Irms/ Urms value.
Calculate the compensation value.
Write the calculated value to the Gain register.
Step-3: Metering calibration (per phase)
-
First calibrate the Power/ Energy offset.
U = Un, I = 0.
Read full 32 bits (or lower 16 bits) Active and Reactive Power
Calculate the compensation values
Write the calculated values to the offset registers respectively.
-
Then calibrate Energy gain at unity power factor:
PF=1.0, U = Un, I = In (Ib).
Connect CF1 to the calibration bench;
User/ PC calculate the energy gain according to the data got
from calibration bench
Write the calculated value to the Energy Gain register.
-
Then calibrate the phase angle compensation at 0.5 inductive
power factor.
PF=0.5L, U = Un, I = In (Ib), Rated frequency = 50Hz, or 60Hz
according to the application;
CF1 connected to the calibration bench;
User/ PC calculate the phase angle according to the data got
from calibration bench;
Write the calculated value to the Phase angle register.
5.2
PARTIAL MEASUREMENT MODE CALIBRA-
TION
The calibration method is as follows:
Step-1: Set the input current to zero and measure the current mean
value (set MeasureType = 1, write 1 to the ReMeasure bit (b14, PMCon-
the result register (the PMIrmsA/PMIrmsB/PMIrmsC registers) reading
(16-bit) and then write the result to the offset register.
Step-2: The output of Partial Measurement result =
ADC_input_voltage *PGA_gain*DPGA_gain*65536 / 1.2. For instance,
a 150 mVrms signal (from CT) with PGA = 1 gets 8192 in the RMS result
register.
Step-3: The user needs to do its own conversion to get meaningful
result. The scaling factor in user's software could be calibrated device
per device.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 90E32ERGI8 | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| 90E36 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:Poly-Phase High-Performance Wide-Span Energy Metering IC |
| 90E36AERGI | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| 90E36AERGI8 | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| 90E36ERGI | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
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