PW系列智能溫度/壓力表包括：PW800壓力表、PW300雙功能溫度/壓力表、PW300、PW600、PW800、PW900，是我公司研制生產并在國內最先推出的雙功能控制儀表，該產品吸收了國外九十年代同類產品的優點，同時還增加了具有我公司的特點，特別適用于高溫熔體同點溫度壓力的測量與控制。該系列產品外形美觀、功能齊全、極好的抗干擾性能使系統可靠工作。
該表采用雙層四位數碼管分別顯示實際壓力值、溫度值；具有壓力、溫度上限報警，可由繼電器觸點輸出、電壓脈沖輸出、雙向可控硅驅動觸發器輸出；兩路恒流（或恒壓）輸出，全自動面板調試程序，使系統校準只需輕輕一按；該表采用三種抗干擾措施，使控制儀可靠工作：第一、采用光電隔離電路使輸入與微處理器隔離，微處理器與輸出隔離，電源與輸入、微處理器、輸出隔離；第二、采用軟件抗干擾措施，使軟件可靠工作；第三、采用硬件程序監視系統，使系統程序受到干擾后能自動恢復正常工作。經實踐應用表明采用以上抗干擾措施可使系統軟件具有很高的可靠性。確保系統工作穩定、可靠。
該產品廣泛應用于石油、化纖、塑料等行業對高溫熔體溫度壓力的測量與控制。
技術指標
數字顯示：雙層四位。上層壓力顯示，下層溫度顯示；
內分辨率：32000
外分辨率：
壓力： 0.01MPa、0.02MPa、0.05MPa面板切換(斷電保護設置≥40年)
溫度：0.1℃、0.2℃、0.5℃、1℃；
非線性：0.5%±1個字、0.2%±1個字、0.1%±1個字、0.05%±1個字。
報警設置：
壓力上限：0～99.99Mpa
溫度上限：0～408℃(或滿量程)
PID輸出：4-20mA、0-10V、1-5V、0-10mA、0-20mA(可選)
繼電器額定值：250VAC、5A
使用環境：-10～+50℃、80%RH
電源：85～265VAC
連續工作時間：長期
開口及安裝尺寸：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