订购注意事项
PT500-503H产品订购注意事项
1、产品量程选择：
为了使产品精度、寿命、稳定性等功能达到最佳效果，产品的量程选择参照以下公式计算：
量程 = 系统最大压力 X （1.2-1.5）倍；
产品的实际测量压力范围，应该在量程范围的15%-80%；
2、产品供电及输出：
供电范围的选择按产品的个输出规格确定：
常规4-20mA/0-20mA、0-5V/10V输出，直流12-30VDC供电；
通用RS485-RTU输出，直流12-30VDC供电；
0.5-4.5VDC输出，直流5VDC；
3、用户要了解产品的测量介质特性：
介质规格、介质温度、介质纯度（是否含有杂质或颗粒等）；
4、用户要了解产品的安装环境及安装方式：
室内或室外安装；
环境温度；
要求的密封等级；
设备的振动范围；
安装方式：螺纹、法兰、特殊结构；
安装空间是否满足产品外形尺寸；
Precautions for ordering PT500-503H products
1. Product range selection:
In order to achieve the best effect of product accuracy, life, stability and other functions, the range selection of the product is calculated by referring to the
following formula:
Range = x (1.2-1.5) times of the maximum system pressure;
The actual measuring pressure range of the product should be 15% - 80% of the range;
2. Product power supply and output:
The selection of power supply range is determined according to the output specifications of the product:
Conventional 4-20mA / 0-20mA, 0-5V / 10V output, DC 12-30vdc power supply;
General rs485-rtu output, DC 12-30vdc power supply;
0.5-4.5vdc output, DC 5VDC;
3. The user should understand the measurement medium characteristics of the product:
Medium specification, medium temperature, medium purity (whether containing impurities or particles, etc.);
4. Users should understand the installation environment and installation method of the product:
Indoor or outdoor installation;
Ambient temperature;
Required sealing level;
Vibration range of equipment;
Installation method: thread, flange, special structure;
Whether the installation space meets the overall dimension of the product;
使用注意事项
严禁产品供电范围超过产品规定标准；
严禁使用硬物（如：螺丝刀、手指、铁钉等）去使得压力膜片受压力测量输出；
电源和信号线按订购产品规格要求，正确接线；
产品安装时，受力部位为“过程连接六方扳手位”，扳手规格与六方相对应；
严禁被测系统的介质温度、压力量程、激励电压超过变送器的额定使用范围；
注意保护变送器引出电缆，现场使用跨度过大时，建议使用金属管保护或架空；
压力变送器属精密计量仪器，切勿强加冲击、摔打，以免损坏芯体
产品安装于通风、干燥、无强腐蚀环境，露天安装加防护装置，避免阳光直接照射；
产品仪表严禁进水/漏水/泡水情况，露天安装加防护装置，避免阳光直接照射；
It is strictly prohibited that the power supply scope of the product exceeds the product standard;
It is forbidden to use hard objects (such as: screwdrivers, fingers, nails, etc.) to make the pressure diaphragm output by pressure measurement;
The power supply and signal lines shall be correctly connected according to the product specifications;
When the product is installed, the stress part is "process connection hexagonal wrench", and the wrench size is corresponding to the hexagonal wrench;
It is strictly prohibited that the medium temperature, pressure range and excitation voltage of the measured system exceed the rated range of the transmitter;
Pay attention to protect the outgoing cable of transmitter. When the span is too large, it is recommended to use metal tube for protection or overhead;
Pressure transmitter is a kind of precision measuring instrument. Do not force impact and fall to avoid damaging the core
The product is installed in a ventilated, dry and non corrosive environment. It is installed in the open air with protective devices to avoid direct sunlight;
Water / water leakage / soaking is strictly prohibited in the instrument of the product. Protective devices are installed in the open air to avoid direct sunlight;
