Description of CAP-3031-S-2-0-L boiler drum water level gauge:
The importance of CAP-3031-S-2-0-L boiler drum water level measurement is evident to anyone, however long the boiler drum water level balance container for measuring technology with the type (differential) measurement method has many defects cannot be improved, mainly reflected in the following aspects:
1, not all conditions exist "false water level measurement, measurement, in the startup and stop, emptying, platoon accident, unstable operating conditions to establish a stable pressure condition time, recovery time is longer or simply cannot establish a normal differential pressure, the need for manual intervention and other issues.
2, under stable working conditions, due to the structural constraints, can not completely solve the water side due to the temperature caused by the system measurement error compensation. Under the condition of boiler shortage and full water, the excessive measurement error may bring serious consequences.
3, complex structure, static sealing point, large construction and winter insulation problems exist.
4, the measurement delay is longer, can not immediately reflect the boiler water level changes, poor quality measurement signal adjustment.
5, due to the existence of condensing cylinder heat release, the use of high cost.
These defects are caused by the differential pressure measurement principle and the unreasonable sampling structure of the system. Under the abnormal working conditions, the boiler safety operation has caused great hidden danger.
To solve the existing problems of drum level measurement, measurement and Control Technology Co. Ltd. Henan new rip for boiler drum level measurement and control conditions of patent design and production of CAP- 3031 intelligent capacitive liquid level meter of boiler drum.
CAP-3031-S-2-0-L intelligent capacitance boiler drum liquid level meter is made of advanced, automatic measuring technology with full measurement automatic compensation function. The utility model solves the problems that the traditional capacitance liquid level meter is difficult to overcome, such as the large temperature drift of the measurement system, the large variation of the dielectric constant of the measured medium on the measurement, the poor linearity of the test and the need for manual on-site calibration. It is important to realize the safe, reliable and accurate measurement and control of the boiler drum water level for the safe, efficient and energy-saving operation of the boiler. Can be widely used in all kinds of liquid level control of industrial drum, high and low, reformer and pressure containers.
Working principle
Using liquid level changes and to probe into the relationship between the changes of capacitance measurement produced, through the special mode of the system software will change detection by compensating capacitance calculation, two line output and the level change is proportional to the 4 ~ 20 m A analog current loop and four sets of S P S T (N O) solid state relay contact.
Technical characteristics
1, two wire current loop, measurement system and current loop isolation;
2, with all working conditions (boiler start, stop, sewage, accident conditions, etc.) under the liquid level accurate continuous measurement and control functions;
3, to the liquid medium dielectric constant change, vapor medium dielectric constant change at the same time automatic compensation, without on-site calibration;
4, to measure the system temperature drift automatic compensation, full temperature range measurement system temperature drift not more than 0.1 P F;
5, C E certified good electromagnetic compatibility characteristics;
6, high temperature, high pressure, long life;
7, high reliability, high precision, high stability;
8, there is no false water level measurement;
9, handheld calibration instrument for the Chinese operating environment, easy to set, with self diagnosis;
technical parameter
Working voltage: Max: 30V
Minimum: 18V (CAP-3031-R, output 3.5mA)
15V CAP-3031-S, output 3.5mA)
10V (output 22mA)
Current loop: two wire 3.5mA ~ 22mA
Fault alarm current: 3.5mA or 22mA can be set
Isolation performance: measurement system and current loop isolation
Explosion-proof grade: ExiaIICT6 (-40 C ~ 70 C)
ExiaIICT1~5 (-40 DEG C ~ 85 DEG C)
Explosion proof parameters:
Power input:
Ui=30V, Ii=100mA, Pi=0.75W
Ci=100pF, Li=10uH
Solid state relay (group):
Ui=30V, Ii=100mA, Pi=0.75W
Ci=150pF, Li=10uH
Measurement range: 0 ~ Max 1270mm
Measurement period: 0.5 seconds
Resolution: 0.02mm
Temperature drift: + 0.5mm Max (-40 C ~ 85 C)
Working pressure: Max 23MPa
Linear deviation: + (1+0.05%FS) mm
Solid state relay (CAP-3031-R):
Configuration: four group SPST (NO) solid state relay
Load voltage: 220V AC/300V DC (non explosion proof place)
DC/AC 30V (ex site)
Load current: 100mA (-40 C ~ 40 C)
50mA (-40 C ~ 85 C)
Alarm mode: "on, off alarm" optional
Five alarm modes are optional
Delay: 1 ~ 60 seconds, can be programmed independently
Medium temperature: 450 degrees C Max.
Ambient temperature: -40 DEG C ~ 85 DEG C (ExiaIICT1-T5)
-40 degrees Celsius to 70 degrees C (ExiaIICT6)
Storage temperature: -55 C ~ 100 C
Communication protocol: HART
Protection level: IP65
Electromagnetic compatibility: through the CE certification
Associated device: CAP-3000S manipulator
Typical applications
A variety of industrial drum, high-pressure, plus low pressure vessel
Liquid level measurement and control of converter liquid level measurement and control