PW系列智能温度/压力表包括：PW800压力表、PW300双功能温度/压力表、PW300、PW600、PW800、PW900，是我公司研制生产并在国内最先推出的双功能控制仪表，该产品吸收了国外九十年代同类产品的优点，同时还增加了具有我公司的特点，特别适用于高温熔体同点温度压力的测量与控制。该系列产品外形美观、功能齐全、极好的抗干扰性能使系统可靠工作。
该表采用双层四位数码管分别显示实际压力值、温度值；具有压力、温度上限报警，可由继电器触点输出、电压脉冲输出、双向可控硅驱动触发器输出；两路恒流（或恒压）输出，全自动面板调试程序，使系统校准只需轻轻一按；该表采用三种抗干扰措施，使控制仪可靠工作：第一、采用光电隔离电路使输入与微处理器隔离，微处理器与输出隔离，电源与输入、微处理器、输出隔离；第二、采用软件抗干扰措施，使软件可靠工作；第三、采用硬件程序监视系统，使系统程序受到干扰后能自动恢复正常工作。经实践应用表明采用以上抗干扰措施可使系统软件具有很高的可靠性。确保系统工作稳定、可靠。
该产品广泛应用于石油、化纤、塑料等行业对高温熔体温度压力的测量与控制。
技术指标
数字显示：双层四位。上层压力显示，下层温度显示；
内分辨率：32000
外分辨率：
压力： 0.01MPa、0.02MPa、0.05MPa面板切换(断电保护设置≥40年)
温度：0.1℃、0.2℃、0.5℃、1℃；
非线性：0.5%±1个字、0.2%±1个字、0.1%±1个字、0.05%±1个字。
报警设置：
压力上限：0～99.99Mpa
温度上限：0～408℃(或满量程)
PID输出：4-20mA、0-10V、1-5V、0-10mA、0-20mA(可选)
继电器额定值：250VAC、5A
使用环境：-10～+50℃、80%RH
电源：85～265VAC
连续工作时间：长期
开口及安装尺寸：90×90×110mm、45×45×110mm、45×90×110mm、90×45×110mm
PW series of intelligent temp and pressure digital instruments are the products of our company. We are the initial designers and vendors of the double-function digital instruments. PW series consist of PW300, PW300dual, PW600, PW800 and PW900. They incorporate the advantages of the same products from foreign countries in 1990s, as well as new features are added. Actually, they are quite suitable for measurement and control at one point for temp and pressure. PW series are good-looking and of excellent EMC performance.
New features:
Two-layer digital LEDs with four-bit for each layer display actual pressure value and temp value;
Pressure and temp alarms can be easily set;
The output can be generated by relay, voltage pulse or silicon via constant voltage or constant current;
System operation is controlled by the key panel;
Calibration can be easily completed just by pressing CAL key on the key panel.
Three new technical methods are introduced to enhance the EMC performance:
Photoelectric modules insulate the microprocessor from input and output interface;
New anti-jamming methods are used in the system program;
A hardware monitor runs all the time, which can reset the system to normal operation from abnormal operation after distortion.
PW series can be widely used in petrol devices, fiber devices and plastic devices.
Parameters
Item
Description
Display
Two-layer structure, top for pressure and bottom for temp
Internal resolution
32,000
External resolution
0.01Mpa、0.02MPa、0.05Mpa
Pressure
0.01MPa, 0.02MPa and 0.05MPa can be automatically switched by key panel
Temp
0.1℃, 0.2℃, 0.5℃, 1℃,
Non-linearity
0.5%±1 point, 0.2%±1point, 0.1%±1point, 0.05%±1 point
Alarm range
0~99.99MPa for pressure; 0~408℃ for temp
PID output
4~20mA, 0~10V, 1~5V, 0~10mA, 0~20mA
Default value of Relay
250V AC, 5A
Operating condition
-10~+50℃, 80%RH
Power supply
85~265V AC
Operation time
Continuously
Outer dimension
90×90×110mm, 45×45×110mm
Mounting dimension
45×90×110mm, 90×45×110mm
