| |
|
|
| |
HENZ3-HR型电子式互感器校验仪 |
|
| |
装置的简介:
数字（光电式、电子式）互感器作为模拟世界到数字世界的桥梁，在数字化变电站中占有举足轻重的地位，可以认为数字（光电式、电子式）互感器是数字化变电站的基石，所有的数字量都是来源于它。因此数字（光电式、电子式）互感器的准确精密度和性能非常重要。我国计量法规定所有的计量器具都必须得到量传，也就是说所有的计量器具都必须能够实现量值朔源。因此在实际应用中需要对数字（光电式、电子式）互感器进行量传，在现场安装使用后也需要对其进行定期校验，验证其测量精度和稳定性，以及对IEC61850国际电工标准协议和规约的支持的正确性。
HENZ3-HR型电子式互感器校验仪内核采用双CPU架构，功能强，以24Bit
AD芯片和512倍过采样技术大大扩展了带宽，提高了测量精度。同时，采用多档位自动切换和FIR滤波器提高动态范围和信噪比。使用LabView开发管理软件，界面美观，使用方便。电源和采样输入采取了大量的电磁兼容措施，能够适应复杂的现场测试环境。采用便携式设计方案，方便实验室和现场检测。
HENZ3-HR型电子式互感器校验仪是我公司互感器研发中心研发生产的一款新型的电子式互感器校验仪，校验仪采用数据采集卡＋工控机结构。数据采集卡采用高精度数据采集卡，配合
NI 公司的全新虚拟仪器界面设计软件 LabView，基于 WINDOWS 操作系统，软件界面友好，功能强。适用于电子互感器模拟输出和数字输出的校验和调试，可用于电子互感器基本准确度测试和复合误差测试，是一款综合功能的校验仪。本装置具有强大的软件分析功能，可以直观的显示波形和各种有效数据，并具有数据存储、离线分析等功能。
HENZ3-HR型电子式互感器数字输出校验系统由：1）标准互感器、2）标准信号转换装置、3）标准A/D转换器、4）同步信号发生装置、5）误差管理计算单元组成。HENZ3-HR型电子式互感器校验仪仪器自身具备有第2）～第5）项的功能，它还具备模拟输出校验功能，是一款测试电子式互感器数字输出和模拟输出误差的综合测试仪。全自动智能型测试检定校验仪器(全自动智能型电子式互感器检定校验系统含工控计算机测控误差管理软件及主机与校准的测试硬件设备配置)。
装置参考执行的标准及规范：
JJG313-94《测量用电流互感器检定规程》
JJG314-94《测量用电压互感器检定规程》
JJG169-93《互感器校验仪检定规程》
GB/T 20840-7《互感器第 7 部分：电子式电压互感器》
GB/T 20840-8《互感器第 8 部分：电子式电流互感器》
IEC61850《变电站的通信网络和系统》
DL/T668-1999《测量用互感器检验装置》
装置使用操作的环境条件：
本系统装置满足而且是专用于各电压等级的数字（光电式、电子式）电压（电流）互感器的试验检测及检定校验工作任务的。
1 海拔高度不超过1500m
2 环境温度：-15~+55℃
3 空气相对湿度：≤90%
4 使用地点：户内/现场使用，可移动
5 必须设有一个可靠接地点，接地电阻<1Ω!
6 工作电源：AC 220V±10%，约800VA，电源电压的波形为实际正弦波。
7 电源频率：50/60 Hz。
8 无导电尘埃，无火灾及爆炸危险，不含有腐蚀金属和绝缘的气体存在。
主要用途:
对符合IEC61850（-9-1、-9-2、-9-2LE）标准的电子式互感器进行校验；对电子式互感器的极性和延时进行校验；对小信号输出的电子式互感器进行校验；对小信号输入的合并单元进行校验；可输出两路0.05级0~7V的精密电压信号，无需升大电压大电流即可；对小信号输入的合并单元进行校验（扩展精密标准源模块）；能够输出数字信号源（FT3格式），无需升大电压大电流即可对支持FT3输入的合并单元进行校验。（扩展数字信号源模块）；能够对FT3输出的电子式互感器进行校验(扩展FT3转换模块)；能够对传统互感器进行校验（扩展模拟信号转换模块）。
主要特点：
HENZ3-HR型电子式互感器校验仪主要用于对符合IEC61850（-9-1、-9-2、-9-2LE）标准输出的电子式互感器进行校验。校验项目包括：比值差、相位差、延时、极性等。同时配置有小信号输入端子，可对小信号输出的电子式互感器进行校验以及对小信号输入的合并单元进行校验等。
主要功能：
1. 使用传统互感器校验装置（BHE型）和Agilent 3458A数字多用表实现量值传递。
2. 可使用内置的GPS或高稳定度的晶体输出脉冲同步信号。
3. 能对IEC61850（-9-1、-9-2、-9-2LE）的协议包进行全帧解析,自动分析ASDU个数,
采样点数等，可显示所有通道波形图，无需抓包即可直观，查看所有通道数据。
4. 具有ST/SC双光纤以太网接口和双RJ45以太网接口,提高可靠性,
同时方便接入不同接口的电子式互感器。
5. 阶准同步算法使得非同步采样的算法误差逼近于零。
6. 采用24Bit AD芯片和512倍过采样技术,大大扩展带宽提高精度。
7. 采用多档位自动切换和FIR滤波器提高动态范围和降低信噪比。
8. 实时显示波形、频率、幅度、相位等数据便于综合分析互感器性能。
9. 带有工控机，800*600触摸屏。更能方便操作。
10. 配有功能强，操作简便的操作软件，可运行于工控机或笔记本
11. 可统计比值差及相位差的均值、变差、极值、多次误差等数据，
可对电子式互感器的稳定性及线性进行全面检定。
12. 可进行多次谐波分析及对电子式互感器的各次谐波精度进行校验。
13. 可对测试过程全程录制及回放。
14. 可进行丢帧测试，实时的统计丢帧数。
主要技术指标：
1. 准确度等级：0.05级(比差误差：≤0.02%，相差误差：≤0.02°(即：角差< 2'))。
内置标准转换装置：准确精度级别0.05%级、0.02%级、0.01%级。
可依据标准互感器和被校互感器的精密度级别而定，选择匹配对应调节转换装置即可检定校验了。
被校验等级：5、3、1、0.5、0.2、0.1、0.5S、0.2S；
2. 通信协议和规约: IEC61850-9-1/ IEC61850-9-2/ IEC61850-9-2LE
3. 标准信号输入范围：
1）额定电压输入量程：100V和100/√3V、100/3V
2）额定电流输入量程：1A、5A
3) 小信号输入量程 150mV、200mV、225mV、4V、1.625V、1V、2V、3.25V、4V、6.5V
4）模拟量输入：信号类型100V和1A/5A。
数字量输入：采用ST型光纤连接器，使用62.5/125多模光纤接口。
4. 精确度测量范围
电压(V):5%-120%Un (有效值 0.05%RD Un =100/√3V或100V)
电流(A):1%-120%In (有效值 0.05%RD In=1A 和 5A)
小信号输入：1V以上量程：1%-120%Un 0.05S级(用于检计量互感器 )
1V以下量程：100%~2000%Un 0.05%级(用于检保护互感器)
5. 谐波测试精度：比差 0.1%Uh 或 0.1%Ih 角差: 10分
6. AD采样精度：在额定量程幅度测量不确定度优于 0.01%
7. 小信号输出（选配，另外付费的功能）
输出电压: 0~ 7V
输出谐波: 2~ 40次
输出精度: 0.05~5V 0.05%RD
谐波精度: 0.05%
8. 输入回路功耗
输入电压回路功耗 < 0.2VA (100V、57.7V)
输入电流回路功耗 < 1VA (5A)
输入电流回路功耗 < 0.2VA (1A)
9. 以太网接口
SC光纤接口: 1个(多模光纤波长820nm～860nm)
ST光纤接口: 1个(多模光纤波长820nm～860nm)
RJ45 接口 2个
光信号工作波长为820nm～860nm，光纤用62.5/125 多模玻璃光纤接口。
10. 同步
光B码同步输入(秒脉冲和B码可配置 ) 1个
光B码同步输出(秒脉冲和B码可配置 ) 1个
电同步输入1个，电同步输出1个
11. 人机接口
显示: TFT液晶分辨率800*600
操作: 触摸屏操作，工控机有USB口，可连接USB的鼠标键盘。
12. 整机重量 ≤12.8kg
13. 供电电源电压220V±10%，50/60Hz
14. 外部空气温度(-15℃ ~ 55℃)
15. 最大相对湿度:<90%
|
|
| |
|
|
| |
产品实物图片： |
|
| |
|
|
| |
装置功能及软件功能： |
|
| |
|
|
| |
电子式互感器数字输出校验的原理图如图1数字输出校验系统框图
|
|
| |
|
|
| |
|
|
| |
电子式互感器数字输出校验系统的软件开发界面如图3所示，其软件功能和操作说明介绍如下： |
|
| |
.jpg) |
|
| |
|
|
| |
电子式互感器模拟输出校验系统的软件开发界面如图 4 所示，其软件功能和操作说明与数字量输出校验系统类似，设置相对简单。测试时，模拟信号通过面板上三芯航插UxA连接至被校测的互感器。 |
|
| |
.jpg) |
|
| |
|
|
| |
电子式互感器模拟输出校验系统
校验系统软件分三个功能界面，分别是误差检定、参数设置、通讯设置。电子式互感器校验仪的软件使用labview开发，界面简洁易用，设计时尽量减少了用户需要设置的环节。一般情况下用户几乎不用设置参数。这样方便用户在现场校验时提高效率。 |
|
| |
|
|
| |
电子式互感器模拟输出校验系统 校验系统软件满足能够实时显示被校测的互感器的比差和角差，以及电网系统的系统常规电气参数、标准互感器与被校测的互感器输出的实时数据及波形，并具有全自动测量、记录和自动存储功能，波形及数据的存储格式是可以依据自己的工作习惯和喜好选择多种方式进行保存的。 |
|
| |
|
|
| |
该校验系统既可以完成电子式电流互感器的校验也可以完成电子式电压互感器的校验。模拟电子式互感器校验系统组成框图如图2所示，该系统分为电流标准通道，电压标准通道，电流被测通道，电压被测通道，校验仪数据处理平台。电流标准通道由升流器、标准电流互感器、标准转换器组成。电流被测通道由升流器、被校互感器组成。校验仪通过采集器获取标准电流传感器和被校电流传感器的电参量，并将这些电参量以标准格式上传给计算机，计算机数据处理平台将同一时刻的两个信号进行比对处理，计算出被校电流传感器的误差情况，显示并记录测量结果。电压标准通道由升压器、标准电压互感器、标准转换器组成。电压被测通道由升压器、被校互感器组成。工作原理与电流校验系统相同。 |
|
| |
|
|
| |
基于虚拟仪器，可实现电子式互感器模拟和数字量输出的比差、相差的测量，记录，及电子式互感器的在线测量比对。为广大电力试验、计量、施工单位提供一种可移动的电子式互感器校验装置。 |
|
| |
|
|
| |
●配置灵活，可根据不同的需要配置/电子式电流互感器校验/电子式电压互感器校验；
●计算被校互感器与标准互感器电流/电压有效值的比差、相差；
●显示当前一次导线的电流、电压、频率等相关信息，便于综合评估被校参数；
●显示被校互感器输出的实时波形，以及相关设置，并自动保存校验数据，生成报表；
●灵活配置试验参数，测试范围，测试次数，采样点数等相关信息。
●准确度高、可靠性强。准确度等级达到0.05级，可用于对0.2S级电子式电流互感器和0.2级电子式电压互感器进行比对和校验。
●采用高精度插值法进行同步，保证被校互感器和标准互感器采集的数据以严格的时序同步，可靠性、实用性大为提高。 |
|
| |
|
|
| |
质量要求(供方对质量负责的条件和期限):
质保期24个月，期内质量“三包”，终身维护。对客户所购产品的使用情况进行全程跟踪服务，并提供二十四小时服务和响应。以上仪器设备无需安装调试，依照使用说明书可直接就地使用。含国内交货到指定港口运费。 |
|
| |
|
|
| |
HENZ3-HR
Electronic Transformer Calibrator
Automatic intelligent Calibration System
|
|
| |
About
this Device: |
|
| |
Digital
(photovoltaic, electronic) transformer as an analog to the
bridge of the world to the digital world, occupies a pivotal
position in the digital substation, digital (photovoltaic,
electronic) transformer that is the cornerstone of the digital
substation, all digital are derived from it. Therefore,
accurate precision and performance of digital (photovoltaic,
electronic) transformer is very important. Our metering
law all the measuring instruments must be the amount of
the pass, which means that all measuring instruments must
be able to realize the magnitude of antedating. Therefore,
the practical application of digital (optoelectronic, electronic)
transformer amount biography installation at the scene also
need regular check, to verify the measurement accuracy and
stability, as well as the standard protocol IEC61850 International
Electrotechnical supported and the Statute of correctness. |
|
| |
|
|
| |
HENZ3-HR
electronic transformer calibrator kernel, has Dual CPU architecture,
24Bit AD chip and 512 times over-sampling techniques greatly
expand the bandwidth, to improve the measurement accuracy.
At the same time, the use of multi-gear automatic switching
and FIR filter to improve the dynamic range and signal-to-noise
ratio. Use the Labview development of management software,
beautiful interface, easy to use. Power and sample input
to take a large number of electromagnetic compatibility
measures, to be able to adapt to the complex field test
environment. With portable design, convenient laboratory
and field testing. |
|
| |
|
|
| |
The
calibrator HENZ3-HR electronic transformer tester, is Researched
and Developed in our R & D Center, produced by our company.
This is a new electronic transformer calibrator calibrator
using the data acquisition card + IPC structure. Using high-precision
data acquisition card, data acquisition card with the new
virtual instrument interface design software NI LabView,
based on the WINDOWS operating system, the software interface
is friendly, powerful. Apply to check and debug electronic
transformer analog output and digital output can be used
for electronic transformer basic accuracy of the test and
the composite error test is a comprehensive function calibrator.
This device has a powerful software analysis capabilities,
intuitive display waveform and valid data, and data storage,
offline analysis. |
|
| |
|
|
| |
HENZ3-HR
type electronic transformer digital output calibration system
consists of: 1) a standard transformer 2) standard signal
conversion apparatus, 3) standard A / D converter, 4) synchronizing
signal generating means, 5) error calculating unit composition.
HENZ3-HR-type electronic transformer calibrator instrument
itself has 2) to 5) function, it also has analog output
calibration function is a test electronic transformer digital
output and analog output error Integrated Tester. Automatic
intelligent tests or calibration equipment(Automatic intelligent
electronic transformer test calibration system the industrial
computer monitoring and control error management software
and host the calibration test hardware configuration)。 |
|
| |
|
|
| |
Device
reference implementation of the standards and specifications:
JJG313-94 "Measuring the current transformer rule".
JJG314-94 "Measuring the voltage transformer rule".
JJG169-93 "transformer calibrator rule.
GB / T 20840-7 "transformers - Part 7: Electronic Voltage
Transformer.
GB / T 20840-8 "Transformers Part 8: Electronic current
transformer.
IEC61850 "substation communication networks and systems."
DL/T668-1999 "measuring transformer testing device. |
|
| |
|
|
| |
Apparatus
uses the operation environmental conditions:
This system unit to meet and dedicated to the voltage level
of the digital (optoelectronic, electronic) transformer
voltage (current) test detection and test verification tasks.
1. Altitude not exceed 1500m.
2. Ambient temperature: -15 ~ +55 ℃.
3. Air relative humidity: ≤ 90%.
4. Use Location: indoor / field use, removable.
5. Must have a reliable ground point grounding resistance
<1Ω.
6. Working power: AC 220V ± 10%, about 800VA, as the actual
sine wave supply
voltage waveform.
7. Power frequency: 50/60 Hz.
8. No conductive dust, no fire and explosion hazard exists
does not corrode metal and
insulation-containing gas. |
|
| |
|
|
| |
Main
Usage:
Meet IEC61850 the (-9-1 -9-2-9-2LE have been added) standard
electronic transformers verify; electronic check electronic
transformer polarity and delay; small signal output transformer
check; parity of the merger of the small-signal input unit;
0.05 0 ~ 7V output two precision voltage signal, without
l large voltage and high current can be; merger of small
signal input unit school experience (extended precision
standard source module); able to output a digital signal
source (FT3 format), do not need to verify liter large voltage
and high current can support the FT3 input merged unit.
(Extended digital signal source module); electronic transformer
output FT3 check (Extended FT3 conversion module); to traditional
transformer parity (the extended analog signal conversion
module). |
|
| |
|
|
| |
Main
features:
HENZ3-HR electronic transformer calibrator for electronic
transformer to meet IEC61850 (-9-1, -9-2,-9-2LE) standard
output checksum. Check project include: the ratio difference,
phase difference, delay, polarity. At the same time small
signal input terminals, electronic transformer small signal
output part as well as the merger of the small-signal input
unit check. |
|
| |
|
|
| |
Main
functions:
1. Using the traditional transformer calibrating device
(BHE type) and Agilent 3458A Digital Multimeter value transfer.
2. Use the built-in GPS or high stability the crystal output
pulse synchronization signal.
3. IEC61850 (-9-1, -9-2,-9-2LE) protocol packets full frame
resolution automatic analysis ASDU data,Sampling points,
all channel waveform diagram, no need to get caught you
can visually view all channel data.
4. ST / SC dual fiber Ethernet interfaces and dual RJ45
Ethernet interface, improve reliability, and convenient
access interface electronic transformer.
5. order quasi-synchronization algorithm makes non-synchronous
sampling algorithm error is
approaching zero.
6. 24Bit AD chip and 512 times oversampling technique, greatly
expand the bandwidth to improve the accuracy.
7 multi-gear automatic switching and FIR filter to improve
the dynamic range and reduce the signal-to-noise ratio.
8. Real-time display of the waveform, frequency, amplitude,
phase, and other data to facilitate
comprehensive analysis of transformer performance.
9. with IPC, 800 * 600 touch screen. More convenient operation.
10. with a powerful, easy operating software can be run
on industrial computer or laptop
11. Statistical ratio difference and phase difference between
the mean, worse, extrema, multiple error data, a comprehensive
test of the stability and linearity of the electronic transformer.
12. Multiple harmonics analysis and electronic transformer
harmonic accuracy check.
13. throughout the testing process. Recording and playback.
14. drop-frame test, real-time statistics of dropped frames. |
|
| |
|
|
| |
The
main technical indicators:
1. Accuracy grade: 0.05 (worse than the error: ≤ 0.02%,
a difference of error: ≤ 0.02 °
(ie: angle difference <2 ')).
Built-in standards conversion devices: the accurate precision
level of 0.05% level, 0.02% level, the 0.01% level.
Precision level in accordance with the standard transformer
transformers and school may be chosen to match the corresponding
adjustment conversion device to test parity.
Parity level: 5,3,1,0.5,0.2,0.1,0.5 S, 0.2S;
2. Communicate protocols and Statute: IEC61850-9-1/IEC61850-9-2/IEC61850-9-2LE
have been add.
3. The input range of the standard signal input range:
1) Rated voltage: 100V and 100 / √ 3V, 100/3V.
2) Rated current input range: 1A, 5A.
3) small signal input range 150mV, 200mV, 225mV, 4V, 1.625V
, 1V, 2V, 3.25V, 4V, 6.5V.
4) Analog Input: the signal types 100V and 1A/5A.
The digital Input: ST type fiber optic connectors, 62.5/125
multimode fiber interface.
4. Accuracy measurement range:
Voltage (V): 5% -120% Un (rms 0.05% RD Un = 100 / √ 3V
or 100V)
Current (A): 1% -120% In (RMS 0.05% RD In = 1A and 5A)
Signal input: 1V above range: 1% -120% Un 0.05S level (for
check metering transformer)
Range 1V following: 100% to 2000% Un 0.05% level (for inspection
protection transformer )
5. The harmonic test accuracy: worse than 0.1% Uh, or 0.1%
Ih angle difference: 10 points
6. AD sampling precision: better than 0.01% measure uncertainty
in the magnitude of rated range.
7. Small signal output (optional, additional charge function)
Output voltage: 0 ~ 7V
Output harmonic: 2 to 40 times
The output accuracy: 0.05 to 5V 0.05%
RD harmonic accuracy: 0.05%.
8. Input circuit power consumption
Input voltage circuit power consumption <0.2VA (100V,
57.7V)
Input current loop power consumption <1VA (5A)
Input current loop power consumption <0.2VA (1A)
9. Ethernet interface
SC fiber interface: 1 (multitude mode fiber wavelength 820nm
to 860nm)
ST fiber interface: 1 (multitude mode fiber wavelength 820nm
to 860nm)
RJ45 interface 2
The optical signal has a wavelength of 820nm ~ 860nm, the
optical fiber with 62.5/125 multimode glass fiber interface.
10. Synchronous
Light B code synchronization input (second pulse and B code
can be configured) one
Light the code synchronization output B (second pulse and
B code can configure) one
A synchronization input electric, electric synchronous output
one
11. Human Interface
Display: TFT LCD Resolution 800 * 600
Operation: touch-screen operation, IPC USB port, you can
connect a USB mouse and keyboard.
12. Whole weight ≤ 12.8kg.
13. Power supply voltage 220V ± 10%, 50/60Hz.
14. Outside air temperature (-15 ℃ ~ 55 ℃).
15. Maximum relative humidity: <90%.
|
|
| |
|
|
| |
|
|
| |
Device
functions and software features:
The schematic diagram of the the electronic transformer
digital output check system block diagram shown in Figure
1 digital output checksum as follow:
|
|
| |
|
|
| |
The
schematic diagram of the the electronic transformer analog
output check test block diagram in Figure 2 is analog output
checksum. |
|
| |
|
|
| |
|
|
| |
The
electronic transformer digital output calibration system
software development interface is shown in Figure 3, its
software features and operating instructions are described
as below: |
|
| |
|
|
| |
|
|
| |
The
electronic transformer analog output calibration system
software development interface is shown in Figure 4, the
software features and instructions with digital output calibration
system similar set is relatively simple. Test, the analog
signal is inserted through the panel on three core flight
UxA connected to the transformer was measured by the school. |
|
| |
|
|
| |
|
|
| |
|
|
| |
The
Electronic transformer analog output calibration system
calibration system software is divided into three functional
interface, error test parameter settings, communication
settings. The electronic transformer calibrator software
using labview development, the interface is simple and easy
to use, designed to minimize the user needs to set the link.
Almost no general set of parameters. This user-friendly
to improve efficiency in field calibration.
The electronic transformer analog output calibration system
calibration system software to meet the real-time display
conventional electrical parameters of the school measured
the ratio of the transformer differential and angle, as
well as the grid system, standard transformer and measured
by school transformer output real-time data and waveforms,
and has a fully automated measurement, recording and automatic
storage function, waveform and data storage format can be
selected in accordance with their own work habits and preferences
of a variety of ways to be saved.
The calibration system either completed the calibration
of electronic current transformers can also complete electronic
voltage transformer checksum. Analog electronic transformer
calibration system block diagram shown in Figure 2, the
system is divided into the current standard channel, voltage
standard channel, the measured current channel, voltage
measured channel calibrator data processing platform. The
current standard channels by the up-flow, standard current
transformer, standard converter. Current measured channels
by the up-flow, composed of school transformer. Calibrator
through the collector obtain the standards current sensor
and the current sensor to be calibrated electrical parameters
and electrical parameters in a standard format to upload
to the computer, computer data processing platform than
dealing with the same time the two signals, calculated the
school current sensor error, display and record the measurement
results. Voltage standard channel booster, standard voltage
transformers, converter standard. The voltage measured channel
booster, composed of school transformer. The working principle
is the same as the current calibration system.
Based virtual instruments, electronic transformer analog
and digital output than the poor, the online measurement
of the difference between the measurement, recording, and
electronic transformers. For the majority of power test,
measurement, construction units to provide a mobile electronic
transformer calibrating device.
● flexible configuration and can be configured depending
on the needs / electronic current transformer calibrator
/ electronic voltage transformer check;
● calculate school transformers with standard transformer
current / voltage rms than the difference, a difference;
● display the current conductor of current, voltage, frequency
and other relevant information to facilitate a comprehensive
assessment of school parameters;
● display the a school transformer output real-time waveform,
and related settings, and automatically save the calibration
data, generate reports;
● flexibility to configure the test parameters, test range,
the number of tests, the number of samples, and other related
information.
● high accuracy and reliability. The accuracy level of
0.05, can be used to compare and check the 0.2S level electronic
current transformers and 0.2 electronic voltage transformer.
● synchronized, ensure that the data collected by the school
transformer and standard transformer stringent timing synchronization,
reliability, practicality greatly improved using high-precision
interpolation. |
|
| |
|
|
| |
Quality requirements: (supply-side responsible for the quality
and duration):
warranty period is 24 months, during this period the quality
of "three guarantees", and all life-long maintenance.
Tracking service the customer purchased the product's use,
and provide 24-hour service and response. Without installation
and commissioning of the above equipment, in accordance
with users' instruction books, can use it directly. The
fees including domestic delivery to the designated port
freight.
|
|
| |
|
|
| |
|
|
| |
|
|
| |
|
|
| |
|
|
|
.jpg)
.jpg)